画面を切り替えた後、SwipeRefreshLayoutのアニメーション効果を一時停止し、消えないソリューション
の原因となる
SwipeRefreshLayoutは一般的なアニメーションアニメーションを使用しているため、インタフェースが非表示になるとアニメーションは停止します.
アトリビュートアニメーションアニメーションアニメーションアニメーションに変更する必要があります
3つのファイルSwipeRefreshLayout、MaterialProgressDrawable、CircleImageViewを変更
修正後のSwipeRefreshLayout
修正されたCircleImageViewは、実は何も変更されていません.
修正後のMaterialProgressDrawable
SwipeRefreshLayoutは一般的なアニメーションアニメーションを使用しているため、インタフェースが非表示になるとアニメーションは停止します.
アトリビュートアニメーションアニメーションアニメーションアニメーションに変更する必要があります
3つのファイルSwipeRefreshLayout、MaterialProgressDrawable、CircleImageViewを変更
修正後のSwipeRefreshLayout
/* * Copyright (C) 2013 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.support.v4.view.MotionEventCompat;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.view.animation.DecelerateInterpolator;
import android.widget.AbsListView;
/** * The SwipeRefreshLayout should be used whenever the user can refresh the * contents of a view via a vertical swipe gesture. The activity that * instantiates this view should add an OnRefreshListener to be notified * whenever the swipe to refresh gesture is completed. The SwipeRefreshLayout * will notify the listener each and every time the gesture is completed again; * the listener is responsible for correctly determining when to actually * initiate a refresh of its content. If the listener determines there should * not be a refresh, it must call setRefreshing(false) to cancel any visual * indication of a refresh. If an activity wishes to show just the progress * animation, it should call setRefreshing(true). To disable the gesture and * progress animation, call setEnabled(false) on the view. * <p> * This layout should be made the parent of the view that will be refreshed as a * result of the gesture and can only support one direct child. This view will * also be made the target of the gesture and will be forced to match both the * width and the height supplied in this layout. The SwipeRefreshLayout does not * provide accessibility events; instead, a menu item must be provided to allow * refresh of the content wherever this gesture is used. * </p> */
public class SwipeRefreshLayout extends ViewGroup {
// Maps to ProgressBar.Large style
public static final int LARGE = MaterialProgressDrawable.LARGE;
// Maps to ProgressBar default style
public static final int DEFAULT = MaterialProgressDrawable.DEFAULT;
private static final String LOG_TAG = SwipeRefreshLayout.class.getSimpleName();
private static final int MAX_ALPHA = 255;
private static final int STARTING_PROGRESS_ALPHA = (int) (.3f * MAX_ALPHA);
private static final int CIRCLE_DIAMETER = 40;
private static final int CIRCLE_DIAMETER_LARGE = 56;
private static final float DECELERATE_INTERPOLATION_FACTOR = 2f;
private static final int INVALID_POINTER = -1;
private static final float DRAG_RATE = .5f;
// Max amount of circle that can be filled by progress during swipe gesture,
// where 1.0 is a full circle
private static final float MAX_PROGRESS_ANGLE = .8f;
private static final int SCALE_DOWN_DURATION = 150;
private static final int ALPHA_ANIMATION_DURATION = 300;
private static final int ANIMATE_TO_TRIGGER_DURATION = 200;
private static final int ANIMATE_TO_START_DURATION = 200;
// Default background for the progress spinner
private static final int CIRCLE_BG_LIGHT = 0xFFFAFAFA;
// Default offset in dips from the top of the view to where the progress spinner should stop
private static final int DEFAULT_CIRCLE_TARGET = 64;
private View mTarget; // the target of the gesture
private OnRefreshListener mListener;
private boolean mRefreshing = false;
private int mTouchSlop;
private float mTotalDragDistance = -1;
private int mMediumAnimationDuration;
private int mCurrentTargetOffsetTop;
// Whether or not the starting offset has been determined.
private boolean mOriginalOffsetCalculated = false;
private float mInitialMotionY;
private float mInitialDownY;
private boolean mIsBeingDragged;
private int mActivePointerId = INVALID_POINTER;
// Whether this item is scaled up rather than clipped
private boolean mScale;
// Target is returning to its start offset because it was cancelled or a
// refresh was triggered.
private boolean mReturningToStart;
private final DecelerateInterpolator mDecelerateInterpolator;
private static final int[] LAYOUT_ATTRS = new int[]{
android.R.attr.enabled
};
private CircleImageView mCircleView;
private int mCircleViewIndex = -1;
protected int mFrom;
private float mStartingScale;
protected int mOriginalOffsetTop;
private MaterialProgressDrawable mProgress;
private ValueAnimator mScaleAnimation;
private ValueAnimator mScaleDownAnimation;
private ValueAnimator mAlphaStartAnimation;
private ValueAnimator mAlphaMaxAnimation;
private ValueAnimator mScaleDownToStartAnimation;
private float mSpinnerFinalOffset;
private boolean mNotify;
private int mCircleWidth;
private int mCircleHeight;
// Whether the client has set a custom starting position;
private boolean mUsingCustomStart;
private AnimatorListenerAdapter mRefreshListener = new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
animation.removeListener(this);
if (mRefreshing) {
// Make sure the progress view is fully visible
mProgress.setAlpha(MAX_ALPHA);
mProgress.start();
if (mNotify) {
if (mListener != null) {
mListener.onRefresh();
}
}
} else {
mProgress.stop();
mCircleView.setVisibility(View.GONE);
setColorViewAlpha(MAX_ALPHA);
// Return the circle to its start position
if (mScale) {
setAnimationProgress(0 /* animation complete and view is hidden */);
} else {
setTargetOffsetTopAndBottom(mOriginalOffsetTop - mCurrentTargetOffsetTop,
true /* requires update */);
}
}
mCurrentTargetOffsetTop = mCircleView.getTop();
}
};
private void setColorViewAlpha(int targetAlpha) {
mCircleView.getBackground().setAlpha(targetAlpha);
mProgress.setAlpha(targetAlpha);
}
/** * The refresh indicator starting and resting position is always positioned * near the top of the refreshing content. This position is a consistent * location, but can be adjusted in either direction based on whether or not * there is a toolbar or actionbar present. * * @param scale Set to true if there is no view at a higher z-order than * where the progress spinner is set to appear. * @param start The offset in pixels from the top of this view at which the * progress spinner should appear. * @param end The offset in pixels from the top of this view at which the * progress spinner should come to rest after a successful swipe * gesture. */
public void setProgressViewOffset(boolean scale, int start, int end) {
mScale = scale;
mCircleView.setVisibility(View.GONE);
mOriginalOffsetTop = mCurrentTargetOffsetTop = start;
mSpinnerFinalOffset = end;
mUsingCustomStart = true;
mCircleView.invalidate();
}
/** * The refresh indicator resting position is always positioned near the top * of the refreshing content. This position is a consistent location, but * can be adjusted in either direction based on whether or not there is a * toolbar or actionbar present. * * @param scale Set to true if there is no view at a higher z-order than * where the progress spinner is set to appear. * @param end The offset in pixels from the top of this view at which the * progress spinner should come to rest after a successful swipe * gesture. */
public void setProgressViewEndTarget(boolean scale, int end) {
mSpinnerFinalOffset = end;
mScale = scale;
mCircleView.invalidate();
}
/** * One of DEFAULT, or LARGE. */
public void setSize(int size) {
if (size != MaterialProgressDrawable.LARGE && size != MaterialProgressDrawable.DEFAULT) {
return;
}
final DisplayMetrics metrics = getResources().getDisplayMetrics();
if (size == MaterialProgressDrawable.LARGE) {
mCircleHeight = mCircleWidth = (int) (CIRCLE_DIAMETER_LARGE * metrics.density);
} else {
mCircleHeight = mCircleWidth = (int) (CIRCLE_DIAMETER * metrics.density);
}
// force the bounds of the progress circle inside the circle view to
// update by setting it to null before updating its size and then
// re-setting it
mCircleView.setImageDrawable(null);
mProgress.updateSizes(size);
mCircleView.setImageDrawable(mProgress);
}
/** * Simple constructor to use when creating a SwipeRefreshLayout from code. * * @param context */
public SwipeRefreshLayout(Context context) {
this(context, null);
}
ValueAnimator mAnimateToStartPosition;
ValueAnimator mAnimateToCorrectPosition;
/** * Constructor that is called when inflating SwipeRefreshLayout from XML. * * @param context * @param attrs */
public SwipeRefreshLayout(Context context, AttributeSet attrs) {
super(context, attrs);
mAnimateToStartPosition = ObjectAnimator.ofFloat(0f, 1f);
mAnimateToStartPosition.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
moveToStart(Float.valueOf(animation.getAnimatedValue().toString()));
}
});
mAnimateToCorrectPosition = ObjectAnimator.ofFloat(0f, 1f);
mAnimateToCorrectPosition.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
int targetTop = 0;
int endTarget = 0;
if (!mUsingCustomStart) {
endTarget = (int) (mSpinnerFinalOffset - Math.abs(mOriginalOffsetTop));
} else {
endTarget = (int) mSpinnerFinalOffset;
}
targetTop = (mFrom + (int) ((endTarget - mFrom) * Float.valueOf(animation.getAnimatedValue().toString())));
int offset = targetTop - mCircleView.getTop();
setTargetOffsetTopAndBottom(offset, false /* requires update */);
mProgress.setArrowScale(1 - Float.valueOf(animation.getAnimatedValue().toString()));
}
});
mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
mMediumAnimationDuration = getResources().getInteger(
android.R.integer.config_mediumAnimTime);
setWillNotDraw(false);
mDecelerateInterpolator = new DecelerateInterpolator(DECELERATE_INTERPOLATION_FACTOR);
final TypedArray a = context.obtainStyledAttributes(attrs, LAYOUT_ATTRS);
setEnabled(a.getBoolean(0, true));
a.recycle();
final DisplayMetrics metrics = getResources().getDisplayMetrics();
mCircleWidth = (int) (CIRCLE_DIAMETER * metrics.density);
mCircleHeight = (int) (CIRCLE_DIAMETER * metrics.density);
createProgressView();
ViewCompat.setChildrenDrawingOrderEnabled(this, true);
// the absolute offset has to take into account that the circle starts at an offset
mSpinnerFinalOffset = DEFAULT_CIRCLE_TARGET * metrics.density;
mTotalDragDistance = mSpinnerFinalOffset;
setColorSchemeResources(R.color.nav_press_txt,
R.color.red_number,
R.color.holo_red_light);
}
protected int getChildDrawingOrder(int childCount, int i) {
if (mCircleViewIndex < 0) {
return i;
} else if (i == childCount - 1) {
// Draw the selected child last
return mCircleViewIndex;
} else if (i >= mCircleViewIndex) {
// Move the children after the selected child earlier one
return i + 1;
} else {
// Keep the children before the selected child the same
return i;
}
}
private void createProgressView() {
mCircleView = new CircleImageView(getContext(), CIRCLE_BG_LIGHT, CIRCLE_DIAMETER / 2);
mProgress = new MaterialProgressDrawable(getContext(), this);
mProgress.setBackgroundColor(CIRCLE_BG_LIGHT);
mCircleView.setImageDrawable(mProgress);
mCircleView.setVisibility(View.GONE);
addView(mCircleView);
}
/** * Set the listener to be notified when a refresh is triggered via the swipe * gesture. */
public void setOnRefreshListener(OnRefreshListener listener) {
mListener = listener;
}
/** * Pre API 11, alpha is used to make the progress circle appear instead of scale. */
private boolean isAlphaUsedForScale() {
return android.os.Build.VERSION.SDK_INT < 11;
}
/** * Notify the widget that refresh state has changed. Do not call this when * refresh is triggered by a swipe gesture. * * @param refreshing Whether or not the view should show refresh progress. */
public void setRefreshing(boolean refreshing) {
if (refreshing && mRefreshing != refreshing) {
// scale and show
mRefreshing = refreshing;
int endTarget = 0;
if (!mUsingCustomStart) {
endTarget = (int) (mSpinnerFinalOffset + mOriginalOffsetTop);
} else {
endTarget = (int) mSpinnerFinalOffset;
}
setTargetOffsetTopAndBottom(endTarget - mCurrentTargetOffsetTop,
true /* requires update */);
mNotify = true;
startScaleUpAnimation(mRefreshListener);
} else {
setRefreshing(refreshing, false /* notify */);
}
}
private void startScaleUpAnimation(AnimatorListenerAdapter listener) {
mCircleView.setVisibility(View.VISIBLE);
if (android.os.Build.VERSION.SDK_INT >= 11) {
// Pre API 11, alpha is used in place of scale up to show the
// progress circle appearing.
// Don't adjust the alpha during appearance otherwise.
mProgress.setAlpha(MAX_ALPHA);
}
mScaleAnimation = ObjectAnimator.ofFloat(0f, 1f).setDuration(mMediumAnimationDuration);
mScaleAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
setAnimationProgress(Float.valueOf(animation.getAnimatedValue().toString()));
}
});
if (listener != null)
mScaleAnimation.addListener(listener);
mScaleAnimation.start();
}
/** * Pre API 11, this does an alpha animation. * * @param progress */
private void setAnimationProgress(float progress) {
if (isAlphaUsedForScale()) {
setColorViewAlpha((int) (progress * MAX_ALPHA));
} else {
ViewCompat.setScaleX(mCircleView, progress);
ViewCompat.setScaleY(mCircleView, progress);
}
}
private void setRefreshing(boolean refreshing, final boolean notify) {
if (mRefreshing != refreshing) {
mNotify = notify;
ensureTarget();
mRefreshing = refreshing;
if (mRefreshing) {
animateOffsetToCorrectPosition(mCurrentTargetOffsetTop, mRefreshListener);
} else {
startScaleDownAnimation(mRefreshListener);
}
}
}
private void startScaleDownAnimation(AnimatorListenerAdapter listener) {
mScaleDownAnimation = ObjectAnimator.ofFloat(1f, 0f).setDuration(SCALE_DOWN_DURATION);
mScaleDownAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
setAnimationProgress(Float.valueOf(animation.getAnimatedValue().toString()));
}
});
if (listener != null)
mScaleDownAnimation.addListener(listener);
mScaleDownAnimation.start();
}
private void startProgressAlphaStartAnimation() {
mAlphaStartAnimation = startAlphaAnimation(mProgress.getAlpha(), STARTING_PROGRESS_ALPHA);
}
private void startProgressAlphaMaxAnimation() {
mAlphaMaxAnimation = startAlphaAnimation(mProgress.getAlpha(), MAX_ALPHA);
}
private ValueAnimator startAlphaAnimation(final int startingAlpha, final int endingAlpha) {
// Pre API 11, alpha is used in place of scale. Don't also use it to
// show the trigger point.
if (mScale && isAlphaUsedForScale()) {
return null;
}
ValueAnimator alpha = new ObjectAnimator().ofFloat(0f, 1f);
alpha.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mProgress
.setAlpha((int) (startingAlpha + ((endingAlpha - startingAlpha)
* Float.valueOf(animation.getAnimatedValue().toString()))));
}
});
alpha.setDuration(ALPHA_ANIMATION_DURATION);
alpha.start();
return alpha;
}
/** * @deprecated Use {@link #setProgressBackgroundColorSchemeResource(int)} */
@Deprecated
public void setProgressBackgroundColor(int colorRes) {
setProgressBackgroundColorSchemeResource(colorRes);
}
/** * Set the background color of the progress spinner disc. * * @param colorRes Resource id of the color. */
public void setProgressBackgroundColorSchemeResource(int colorRes) {
setProgressBackgroundColorSchemeColor(getResources().getColor(colorRes));
}
/** * Set the background color of the progress spinner disc. * * @param color */
public void setProgressBackgroundColorSchemeColor(int color) {
mCircleView.setBackgroundColor(color);
mProgress.setBackgroundColor(color);
}
/** * @deprecated Use {@link #setColorSchemeResources(int...)} */
@Deprecated
public void setColorScheme(int... colors) {
setColorSchemeResources(colors);
}
/** * Set the color resources used in the progress animation from color resources. * The first color will also be the color of the bar that grows in response * to a user swipe gesture. * * @param colorResIds */
public void setColorSchemeResources(int... colorResIds) {
final Resources res = getResources();
int[] colorRes = new int[colorResIds.length];
for (int i = 0; i < colorResIds.length; i++) {
colorRes[i] = res.getColor(colorResIds[i]);
}
setColorSchemeColors(colorRes);
}
/** * Set the colors used in the progress animation. The first * color will also be the color of the bar that grows in response to a user * swipe gesture. * * @param colors */
public void setColorSchemeColors(int... colors) {
ensureTarget();
mProgress.setColorSchemeColors(colors);
}
/** * @return Whether the SwipeRefreshWidget is actively showing refresh * progress. */
public boolean isRefreshing() {
return mRefreshing;
}
private void ensureTarget() {
// Don't bother getting the parent height if the parent hasn't been laid
// out yet.
if (mTarget == null) {
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
if (!child.equals(mCircleView)) {
mTarget = child;
break;
}
}
}
}
/** * Set the distance to trigger a sync in dips * * @param distance */
public void setDistanceToTriggerSync(int distance) {
mTotalDragDistance = distance;
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
final int width = getMeasuredWidth();
final int height = getMeasuredHeight();
if (getChildCount() == 0) {
return;
}
if (mTarget == null) {
ensureTarget();
}
if (mTarget == null) {
return;
}
final View child = mTarget;
final int childLeft = getPaddingLeft();
final int childTop = getPaddingTop();
final int childWidth = width - getPaddingLeft() - getPaddingRight();
final int childHeight = height - getPaddingTop() - getPaddingBottom();
child.layout(childLeft, childTop, childLeft + childWidth, childTop + childHeight);
int circleWidth = mCircleView.getMeasuredWidth();
int circleHeight = mCircleView.getMeasuredHeight();
mCircleView.layout((width / 2 - circleWidth / 2), mCurrentTargetOffsetTop,
(width / 2 + circleWidth / 2), mCurrentTargetOffsetTop + circleHeight);
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (mTarget == null) {
ensureTarget();
}
if (mTarget == null) {
return;
}
mTarget.measure(MeasureSpec.makeMeasureSpec(
getMeasuredWidth() - getPaddingLeft() - getPaddingRight(),
MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(
getMeasuredHeight() - getPaddingTop() - getPaddingBottom(), MeasureSpec.EXACTLY));
mCircleView.measure(MeasureSpec.makeMeasureSpec(mCircleWidth, MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(mCircleHeight, MeasureSpec.EXACTLY));
if (!mUsingCustomStart && !mOriginalOffsetCalculated) {
mOriginalOffsetCalculated = true;
mCurrentTargetOffsetTop = mOriginalOffsetTop = -mCircleView.getMeasuredHeight();
}
mCircleViewIndex = -1;
// Get the index of the circleview.
for (int index = 0; index < getChildCount(); index++) {
if (getChildAt(index) == mCircleView) {
mCircleViewIndex = index;
break;
}
}
}
/** * Get the diameter of the progress circle that is displayed as part of the * swipe to refresh layout. This is not valid until a measure pass has * completed. * * @return Diameter in pixels of the progress circle view. */
public int getProgressCircleDiameter() {
return mCircleView != null ? mCircleView.getMeasuredHeight() : 0;
}
/** * @return Whether it is possible for the child view of this layout to * scroll up. Override this if the child view is a custom view. */
public boolean canChildScrollUp() {
if (android.os.Build.VERSION.SDK_INT < 14) {
if (mTarget instanceof AbsListView) {
final AbsListView absListView = (AbsListView) mTarget;
return absListView.getChildCount() > 0
&& (absListView.getFirstVisiblePosition() > 0 || absListView.getChildAt(0)
.getTop() < absListView.getPaddingTop());
} else {
return ViewCompat.canScrollVertically(mTarget, -1) || mTarget.getScrollY() > 0;
}
} else {
return ViewCompat.canScrollVertically(mTarget, -1);
}
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
ensureTarget();
final int action = MotionEventCompat.getActionMasked(ev);
if (mReturningToStart && action == MotionEvent.ACTION_DOWN) {
mReturningToStart = false;
}
if (!isEnabled() || mReturningToStart || canChildScrollUp() || mRefreshing) {
// Fail fast if we're not in a state where a swipe is possible
return false;
}
switch (action) {
case MotionEvent.ACTION_DOWN:
setTargetOffsetTopAndBottom(mOriginalOffsetTop - mCircleView.getTop(), true);
mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
mIsBeingDragged = false;
final float initialDownY = getMotionEventY(ev, mActivePointerId);
if (initialDownY == -1) {
return false;
}
mInitialDownY = initialDownY;
break;
case MotionEvent.ACTION_MOVE:
if (mActivePointerId == INVALID_POINTER) {
Log.e(LOG_TAG, "Got ACTION_MOVE event but don't have an active pointer id.");
return false;
}
final float y = getMotionEventY(ev, mActivePointerId);
if (y == -1) {
return false;
}
final float yDiff = y - mInitialDownY;
if (yDiff > mTouchSlop && !mIsBeingDragged) {
mInitialMotionY = mInitialDownY + mTouchSlop;
mIsBeingDragged = true;
mProgress.setAlpha(STARTING_PROGRESS_ALPHA);
}
break;
case MotionEventCompat.ACTION_POINTER_UP:
onSecondaryPointerUp(ev);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
mIsBeingDragged = false;
mActivePointerId = INVALID_POINTER;
break;
}
return mIsBeingDragged;
}
private float getMotionEventY(MotionEvent ev, int activePointerId) {
final int index = MotionEventCompat.findPointerIndex(ev, activePointerId);
if (index < 0) {
return -1;
}
return MotionEventCompat.getY(ev, index);
}
@Override
public void requestDisallowInterceptTouchEvent(boolean b) {
// Nope.
}
private boolean isAnimationRunning(ValueAnimator animation) {
return animation != null && animation.isStarted() && animation.isRunning();
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
final int action = MotionEventCompat.getActionMasked(ev);
if (mReturningToStart && action == MotionEvent.ACTION_DOWN) {
mReturningToStart = false;
}
if (!isEnabled() || mReturningToStart || canChildScrollUp()) {
// Fail fast if we're not in a state where a swipe is possible
return false;
}
switch (action) {
case MotionEvent.ACTION_DOWN:
mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
mIsBeingDragged = false;
break;
case MotionEvent.ACTION_MOVE: {
final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
if (pointerIndex < 0) {
Log.e(LOG_TAG, "Got ACTION_MOVE event but have an invalid active pointer id.");
return false;
}
final float y = MotionEventCompat.getY(ev, pointerIndex);
final float overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
if (mIsBeingDragged) {
mProgress.showArrow(true);
float originalDragPercent = overscrollTop / mTotalDragDistance;
if (originalDragPercent < 0) {
return false;
}
float dragPercent = Math.min(1f, Math.abs(originalDragPercent));
float adjustedPercent = (float) Math.max(dragPercent - .4, 0) * 5 / 3;
float extraOS = Math.abs(overscrollTop) - mTotalDragDistance;
float slingshotDist = mUsingCustomStart ? mSpinnerFinalOffset
- mOriginalOffsetTop : mSpinnerFinalOffset;
float tensionSlingshotPercent = Math.max(0,
Math.min(extraOS, slingshotDist * 2) / slingshotDist);
float tensionPercent = (float) ((tensionSlingshotPercent / 4) - Math.pow(
(tensionSlingshotPercent / 4), 2)) * 2f;
float extraMove = (slingshotDist) * tensionPercent * 2;
int targetY = mOriginalOffsetTop
+ (int) ((slingshotDist * dragPercent) + extraMove);
// where 1.0f is a full circle
if (mCircleView.getVisibility() != View.VISIBLE) {
mCircleView.setVisibility(View.VISIBLE);
}
if (!mScale) {
ViewCompat.setScaleX(mCircleView, 1f);
ViewCompat.setScaleY(mCircleView, 1f);
}
if (overscrollTop < mTotalDragDistance) {
if (mScale) {
setAnimationProgress(overscrollTop / mTotalDragDistance);
}
if (mProgress.getAlpha() > STARTING_PROGRESS_ALPHA
&& !isAnimationRunning(mAlphaStartAnimation)) {
// Animate the alpha
startProgressAlphaStartAnimation();
}
float strokeStart = adjustedPercent * .8f;
mProgress.setStartEndTrim(0f, Math.min(MAX_PROGRESS_ANGLE, strokeStart));
mProgress.setArrowScale(Math.min(1f, adjustedPercent));
} else {
if (mProgress.getAlpha() < MAX_ALPHA
&& !isAnimationRunning(mAlphaMaxAnimation)) {
// Animate the alpha
startProgressAlphaMaxAnimation();
}
}
float rotation = (-0.25f + .4f * adjustedPercent + tensionPercent * 2) * .5f;
mProgress.setProgressRotation(rotation);
setTargetOffsetTopAndBottom(targetY - mCurrentTargetOffsetTop,
true /* requires update */);
}
break;
}
case MotionEventCompat.ACTION_POINTER_DOWN: {
final int index = MotionEventCompat.getActionIndex(ev);
mActivePointerId = MotionEventCompat.getPointerId(ev, index);
break;
}
case MotionEventCompat.ACTION_POINTER_UP:
onSecondaryPointerUp(ev);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL: {
if (mActivePointerId == INVALID_POINTER) {
if (action == MotionEvent.ACTION_UP) {
Log.e(LOG_TAG, "Got ACTION_UP event but don't have an active pointer id.");
}
return false;
}
final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
final float y = MotionEventCompat.getY(ev, pointerIndex);
final float overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
mIsBeingDragged = false;
if (overscrollTop > mTotalDragDistance) {
setRefreshing(true, true /* notify */);
} else {
// cancel refresh
mRefreshing = false;
mProgress.setStartEndTrim(0f, 0f);
AnimatorListenerAdapter listener = null;
if (!mScale) {
listener = new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
animation.removeListener(this);
if (!mScale) {
startScaleDownAnimation(null);
}
}
};
}
animateOffsetToStartPosition(mCurrentTargetOffsetTop, listener);
mProgress.showArrow(false);
}
mActivePointerId = INVALID_POINTER;
return false;
}
}
return true;
}
private void animateOffsetToCorrectPosition(int from, AnimatorListenerAdapter listener) {
mFrom = from;
mAnimateToCorrectPosition.cancel();
mAnimateToCorrectPosition.setDuration(ANIMATE_TO_TRIGGER_DURATION);
mAnimateToCorrectPosition.setInterpolator(mDecelerateInterpolator);
if (listener != null)
mAnimateToCorrectPosition.addListener(listener);
mAnimateToCorrectPosition.start();
}
private void animateOffsetToStartPosition(int from, AnimatorListenerAdapter listener) {
if (mScale) {
// Scale the item back down
startScaleDownReturnToStartAnimation(from, listener);
} else {
mFrom = from;
mAnimateToStartPosition.cancel();
mAnimateToStartPosition.setDuration(ANIMATE_TO_START_DURATION);
mAnimateToStartPosition.setInterpolator(mDecelerateInterpolator);
if (listener != null)
mAnimateToStartPosition.addListener(listener);
mAnimateToStartPosition.start();
}
}
private void moveToStart(float interpolatedTime) {
int targetTop = 0;
targetTop = (mFrom + (int) ((mOriginalOffsetTop - mFrom) * interpolatedTime));
int offset = targetTop - mCircleView.getTop();
setTargetOffsetTopAndBottom(offset, false /* requires update */);
}
private void startScaleDownReturnToStartAnimation(int from,
AnimatorListenerAdapter listener) {
mFrom = from;
if (isAlphaUsedForScale()) {
mStartingScale = mProgress.getAlpha();
} else {
mStartingScale = ViewCompat.getScaleX(mCircleView);
}
mScaleDownToStartAnimation = new ObjectAnimator().ofFloat(0f, 1f).setDuration(SCALE_DOWN_DURATION);
mScaleDownToStartAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float targetScale = (mStartingScale + (-mStartingScale * Float.valueOf(animation.getAnimatedValue().toString())));
setAnimationProgress(targetScale);
moveToStart(Float.valueOf(animation.getAnimatedValue().toString()));
}
});
if (listener != null)
mScaleDownToStartAnimation.addListener(listener);
mScaleDownToStartAnimation.start();
}
private void setTargetOffsetTopAndBottom(int offset, boolean requiresUpdate) {
mCircleView.bringToFront();
mCircleView.offsetTopAndBottom(offset);
mCurrentTargetOffsetTop = mCircleView.getTop();
if (requiresUpdate && android.os.Build.VERSION.SDK_INT < 11) {
invalidate();
}
}
private void onSecondaryPointerUp(MotionEvent ev) {
final int pointerIndex = MotionEventCompat.getActionIndex(ev);
final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex);
if (pointerId == mActivePointerId) {
// This was our active pointer going up. Choose a new
// active pointer and adjust accordingly.
final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex);
}
}
/** * Classes that wish to be notified when the swipe gesture correctly * triggers a refresh should implement this interface. */
public interface OnRefreshListener {
public void onRefresh();
}
}
修正されたCircleImageViewは、実は何も変更されていません.
/* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RadialGradient;
import android.graphics.Shader;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.support.v4.view.ViewCompat;
import android.widget.ImageView;
/** * Private class created to work around issues with AnimationListeners being * called before the animation is actually complete and support shadows on older * platforms. * * @hide */
class CircleImageView extends ImageView {
private static final int KEY_SHADOW_COLOR = 0x1E000000;
private static final int FILL_SHADOW_COLOR = 0x3D000000;
// PX
private static final float X_OFFSET = 0f;
private static final float Y_OFFSET = 1.75f;
private static final float SHADOW_RADIUS = 3.5f;
private static final int SHADOW_ELEVATION = 4;
private int mShadowRadius;
public CircleImageView(Context context, int color, final float radius) {
super(context);
final float density = getContext().getResources().getDisplayMetrics().density;
final int diameter = (int) (radius * density * 2);
final int shadowYOffset = (int) (density * Y_OFFSET);
final int shadowXOffset = (int) (density * X_OFFSET);
mShadowRadius = (int) (density * SHADOW_RADIUS);
ShapeDrawable circle;
if (elevationSupported()) {
circle = new ShapeDrawable(new OvalShape());
ViewCompat.setElevation(this, SHADOW_ELEVATION * density);
} else {
OvalShape oval = new OvalShadow(mShadowRadius, diameter);
circle = new ShapeDrawable(oval);
ViewCompat.setLayerType(this, ViewCompat.LAYER_TYPE_SOFTWARE, circle.getPaint());
circle.getPaint().setShadowLayer(mShadowRadius, shadowXOffset, shadowYOffset,
KEY_SHADOW_COLOR);
final int padding = mShadowRadius;
// set padding so the inner image sits correctly within the shadow.
setPadding(padding, padding, padding, padding);
}
circle.getPaint().setColor(color);
setBackgroundDrawable(circle);
}
private boolean elevationSupported() {
return android.os.Build.VERSION.SDK_INT >= 21;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (!elevationSupported()) {
setMeasuredDimension(getMeasuredWidth() + mShadowRadius*2, getMeasuredHeight()
+ mShadowRadius*2);
}
}
/** * Update the background color of the circle image view. * * @param colorRes Id of a color resource. */
public void setBackgroundColorRes(int colorRes) {
setBackgroundColor(getContext().getResources().getColor(colorRes));
}
@Override
public void setBackgroundColor(int color) {
if (getBackground() instanceof ShapeDrawable) {
((ShapeDrawable) getBackground()).getPaint().setColor(color);
}
}
private class OvalShadow extends OvalShape {
private RadialGradient mRadialGradient;
private Paint mShadowPaint;
private int mCircleDiameter;
public OvalShadow(int shadowRadius, int circleDiameter) {
super();
mShadowPaint = new Paint();
mShadowRadius = shadowRadius;
mCircleDiameter = circleDiameter;
mRadialGradient = new RadialGradient(mCircleDiameter / 2, mCircleDiameter / 2,
mShadowRadius, new int[] {
FILL_SHADOW_COLOR, Color.TRANSPARENT
}, null, Shader.TileMode.CLAMP);
mShadowPaint.setShader(mRadialGradient);
}
@Override
public void draw(Canvas canvas, Paint paint) {
final int viewWidth = CircleImageView.this.getWidth();
final int viewHeight = CircleImageView.this.getHeight();
canvas.drawCircle(viewWidth / 2, viewHeight / 2, (mCircleDiameter / 2 + mShadowRadius),
mShadowPaint);
canvas.drawCircle(viewWidth / 2, viewHeight / 2, (mCircleDiameter / 2), paint);
}
}
}
修正後のMaterialProgressDrawable
/* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Path;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.Animatable;
import android.graphics.drawable.Drawable;
import android.support.annotation.IntDef;
import android.support.annotation.NonNull;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.ArrayList;
/** * Fancy progress indicator for Material theme. * * @hide */
class MaterialProgressDrawable extends Drawable implements Animatable {
private static final Interpolator LINEAR_INTERPOLATOR = new LinearInterpolator();
private static final Interpolator END_CURVE_INTERPOLATOR = new EndCurveInterpolator();
private static final Interpolator START_CURVE_INTERPOLATOR = new StartCurveInterpolator();
private static final Interpolator EASE_INTERPOLATOR = new AccelerateDecelerateInterpolator();
@Retention(RetentionPolicy.CLASS)
@IntDef({LARGE, DEFAULT})
public @interface ProgressDrawableSize {}
// Maps to ProgressBar.Large style
static final int LARGE = 0;
// Maps to ProgressBar default style
static final int DEFAULT = 1;
// Maps to ProgressBar default style
private static final int CIRCLE_DIAMETER = 40;
private static final float CENTER_RADIUS = 8.75f; //should add up to 10 when + stroke_width
private static final float STROKE_WIDTH = 2.5f;
// Maps to ProgressBar.Large style
private static final int CIRCLE_DIAMETER_LARGE = 56;
private static final float CENTER_RADIUS_LARGE = 12.5f;
private static final float STROKE_WIDTH_LARGE = 3f;
private final int[] COLORS = new int[] {
Color.BLACK
};
/** The duration of a single progress spin in milliseconds. */
private static final int ANIMATION_DURATION = 1000 * 80 / 60;
/** The number of points in the progress "star". */
private static final float NUM_POINTS = 5f;
/** The list of animators operating on this drawable. */
private final ArrayList<ValueAnimator> mAnimators = new ArrayList<>();
/** The indicator ring, used to manage animation state. */
private final Ring mRing;
/** Canvas rotation in degrees. */
private float mRotation;
/** Layout info for the arrowhead in dp */
private static final int ARROW_WIDTH = 10;
private static final int ARROW_HEIGHT = 5;
private static final float ARROW_OFFSET_ANGLE = 5;
/** Layout info for the arrowhead for the large spinner in dp */
private static final int ARROW_WIDTH_LARGE = 12;
private static final int ARROW_HEIGHT_LARGE = 6;
private static final float MAX_PROGRESS_ARC = .8f;
private Resources mResources;
private View mParent;
private ValueAnimator mAnimation;
private float mRotationCount;
private double mWidth;
private double mHeight;
boolean mFinishing;
public MaterialProgressDrawable(Context context, View parent) {
mParent = parent;
mResources = context.getResources();
mRing = new Ring(mCallback);
mRing.setColors(COLORS);
updateSizes(DEFAULT);
setupAnimators();
}
private void setSizeParameters(double progressCircleWidth, double progressCircleHeight,
double centerRadius, double strokeWidth, float arrowWidth, float arrowHeight) {
final Ring ring = mRing;
final DisplayMetrics metrics = mResources.getDisplayMetrics();
final float screenDensity = metrics.density;
mWidth = progressCircleWidth * screenDensity;
mHeight = progressCircleHeight * screenDensity;
ring.setStrokeWidth((float) strokeWidth * screenDensity);
ring.setCenterRadius(centerRadius * screenDensity);
ring.setColorIndex(0);
ring.setArrowDimensions(arrowWidth * screenDensity, arrowHeight * screenDensity);
ring.setInsets((int) mWidth, (int) mHeight);
}
/** * Set the overall size for the progress spinner. This updates the radius * and stroke width of the ring. * */
public void updateSizes(@ProgressDrawableSize int size) {
if (size == LARGE) {
setSizeParameters(CIRCLE_DIAMETER_LARGE, CIRCLE_DIAMETER_LARGE, CENTER_RADIUS_LARGE,
STROKE_WIDTH_LARGE, ARROW_WIDTH_LARGE, ARROW_HEIGHT_LARGE);
} else {
setSizeParameters(CIRCLE_DIAMETER, CIRCLE_DIAMETER, CENTER_RADIUS, STROKE_WIDTH,
ARROW_WIDTH, ARROW_HEIGHT);
}
}
/** * @param show Set to true to display the arrowhead on the progress spinner. */
public void showArrow(boolean show) {
mRing.setShowArrow(show);
}
/** * @param scale Set the scale of the arrowhead for the spinner. */
public void setArrowScale(float scale) {
mRing.setArrowScale(scale);
}
/** * Set the start and end trim for the progress spinner arc. * * @param startAngle start angle * @param endAngle end angle */
public void setStartEndTrim(float startAngle, float endAngle) {
mRing.setStartTrim(startAngle);
mRing.setEndTrim(endAngle);
}
/** * Set the amount of rotation to apply to the progress spinner. * * @param rotation Rotation is from [0..1] */
public void setProgressRotation(float rotation) {
mRing.setRotation(rotation);
}
/** * Update the background color of the circle image view. */
public void setBackgroundColor(int color) {
mRing.setBackgroundColor(color);
}
/** * Set the colors used in the progress animation from color resources. * The first color will also be the color of the bar that grows in response * to a user swipe gesture. * * @param colors */
public void setColorSchemeColors(int... colors) {
mRing.setColors(colors);
mRing.setColorIndex(0);
}
@Override
public int getIntrinsicHeight() {
return (int) mHeight;
}
@Override
public int getIntrinsicWidth() {
return (int) mWidth;
}
@Override
public void draw(Canvas c) {
final Rect bounds = getBounds();
final int saveCount = c.save();
c.rotate(mRotation, bounds.exactCenterX(), bounds.exactCenterY());
mRing.draw(c, bounds);
c.restoreToCount(saveCount);
}
@Override
public void setAlpha(int alpha) {
mRing.setAlpha(alpha);
}
public int getAlpha() {
return mRing.getAlpha();
}
@Override
public void setColorFilter(ColorFilter colorFilter) {
mRing.setColorFilter(colorFilter);
}
@SuppressWarnings("unused")
void setRotation(float rotation) {
mRotation = rotation;
invalidateSelf();
}
@SuppressWarnings("unused")
private float getRotation() {
return mRotation;
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
@Override
public boolean isRunning() {
final ArrayList<ValueAnimator> animators = mAnimators;
final int N = animators.size();
for (int i = 0; i < N; i++) {
final ValueAnimator animator = animators.get(i);
if (animator.isStarted() && animator.isRunning()) {
return true;
}
}
return false;
}
@Override
public void start() {
setupAnimators();
mAnimation.cancel();
mRing.storeOriginals();
// Already showing some part of the ring
if (mRing.getEndTrim() != mRing.getStartTrim()) {
mFinishing = true;
mAnimation.setDuration(ANIMATION_DURATION/2);
mAnimation.start();
} else {
mRing.setColorIndex(0);
mRing.resetOriginals();
mAnimation.setDuration(ANIMATION_DURATION);
mAnimation.start();
}
}
@Override
public void stop() {
mAnimation.cancel();
setRotation(0);
mRing.setShowArrow(false);
mRing.setColorIndex(0);
mRing.resetOriginals();
}
private void applyFinishTranslation(float interpolatedTime, Ring ring) {
// shrink back down and complete a full rotation before
// starting other circles
// Rotation goes between [0..1].
float targetRotation = (float) (Math.floor(ring.getStartingRotation() / MAX_PROGRESS_ARC)
+ 1f);
final float startTrim = ring.getStartingStartTrim()
+ (ring.getStartingEndTrim() - ring.getStartingStartTrim()) * interpolatedTime;
ring.setStartTrim(startTrim);
final float rotation = ring.getStartingRotation()
+ ((targetRotation - ring.getStartingRotation()) * interpolatedTime);
ring.setRotation(rotation);
}
private void setupAnimators() {
final Ring ring = mRing;
final ValueAnimator animation = ObjectAnimator.ofFloat(0f,1f);
animation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
if (mFinishing) {
applyFinishTranslation(Float.valueOf(animation.getAnimatedValue().toString()), ring);
} else {
// The minProgressArc is calculated from 0 to create an
// angle that
// matches the stroke width.
final float minProgressArc = (float) Math.toRadians(
ring.getStrokeWidth() / (2 * Math.PI * ring.getCenterRadius()));
final float startingEndTrim = ring.getStartingEndTrim();
final float startingTrim = ring.getStartingStartTrim();
final float startingRotation = ring.getStartingRotation();
// Offset the minProgressArc to where the endTrim is
// located.
final float minArc = MAX_PROGRESS_ARC - minProgressArc;
final float endTrim = startingEndTrim + (minArc
* START_CURVE_INTERPOLATOR.getInterpolation(Float.valueOf(animation.getAnimatedValue().toString())));
ring.setEndTrim(endTrim);
final float startTrim = startingTrim + (MAX_PROGRESS_ARC
* END_CURVE_INTERPOLATOR.getInterpolation(Float.valueOf(animation.getAnimatedValue().toString())));
ring.setStartTrim(startTrim);
final float rotation = startingRotation + (0.25f * Float.valueOf(animation.getAnimatedValue().toString()));
ring.setRotation(rotation);
float groupRotation = ((720.0f / NUM_POINTS) * Float.valueOf(animation.getAnimatedValue().toString()))
+ (720.0f * (mRotationCount / NUM_POINTS));
setRotation(groupRotation);
}
}
});
animation.setRepeatCount(Animation.INFINITE);
animation.setInterpolator(LINEAR_INTERPOLATOR);
animation.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(Animator animation) {
mRotationCount = 0;
}
@Override
public void onAnimationEnd(Animator animation) {
animation.removeListener(this);
}
@Override
public void onAnimationRepeat(Animator animation) {
ring.storeOriginals();
ring.goToNextColor();
ring.setStartTrim(ring.getEndTrim());
if (mFinishing) {
// finished closing the last ring from the swipe gesture; go
// into progress mode
mFinishing = false;
animation.setDuration(ANIMATION_DURATION);
ring.setShowArrow(false);
} else {
mRotationCount = (mRotationCount + 1) % (NUM_POINTS);
}
}
});
mAnimation = animation;
}
private final Callback mCallback = new Callback() {
@Override
public void invalidateDrawable(Drawable d) {
invalidateSelf();
}
@Override
public void scheduleDrawable(Drawable d, Runnable what, long when) {
scheduleSelf(what, when);
}
@Override
public void unscheduleDrawable(Drawable d, Runnable what) {
unscheduleSelf(what);
}
};
private static class Ring {
private final RectF mTempBounds = new RectF();
private final Paint mPaint = new Paint();
private final Paint mArrowPaint = new Paint();
private final Callback mCallback;
private float mStartTrim = 0.0f;
private float mEndTrim = 0.0f;
private float mRotation = 0.0f;
private float mStrokeWidth = 5.0f;
private float mStrokeInset = 2.5f;
private int[] mColors;
// mColorIndex represents the offset into the available mColors that the
// progress circle should currently display. As the progress circle is
// animating, the mColorIndex moves by one to the next available color.
private int mColorIndex;
private float mStartingStartTrim;
private float mStartingEndTrim;
private float mStartingRotation;
private boolean mShowArrow;
private Path mArrow;
private float mArrowScale;
private double mRingCenterRadius;
private int mArrowWidth;
private int mArrowHeight;
private int mAlpha;
private final Paint mCirclePaint = new Paint();
private int mBackgroundColor;
public Ring(Callback callback) {
mCallback = callback;
mPaint.setStrokeCap(Paint.Cap.SQUARE);
mPaint.setAntiAlias(true);
mPaint.setStyle(Style.STROKE);
mArrowPaint.setStyle(Style.FILL);
mArrowPaint.setAntiAlias(true);
}
public void setBackgroundColor(int color) {
mBackgroundColor = color;
}
/** * Set the dimensions of the arrowhead. * * @param width Width of the hypotenuse of the arrow head * @param height Height of the arrow point */
public void setArrowDimensions(float width, float height) {
mArrowWidth = (int) width;
mArrowHeight = (int) height;
}
/** * Draw the progress spinner */
public void draw(Canvas c, Rect bounds) {
final RectF arcBounds = mTempBounds;
arcBounds.set(bounds);
arcBounds.inset(mStrokeInset, mStrokeInset);
final float startAngle = (mStartTrim + mRotation) * 360;
final float endAngle = (mEndTrim + mRotation) * 360;
float sweepAngle = endAngle - startAngle;
mPaint.setColor(mColors[mColorIndex]);
c.drawArc(arcBounds, startAngle, sweepAngle, false, mPaint);
drawTriangle(c, startAngle, sweepAngle, bounds);
if (mAlpha < 255) {
mCirclePaint.setColor(mBackgroundColor);
mCirclePaint.setAlpha(255 - mAlpha);
c.drawCircle(bounds.exactCenterX(), bounds.exactCenterY(), bounds.width() / 2,
mCirclePaint);
}
}
private void drawTriangle(Canvas c, float startAngle, float sweepAngle, Rect bounds) {
if (mShowArrow) {
if (mArrow == null) {
mArrow = new Path();
mArrow.setFillType(Path.FillType.EVEN_ODD);
} else {
mArrow.reset();
}
// Adjust the position of the triangle so that it is inset as
// much as the arc, but also centered on the arc.
float inset = (int) mStrokeInset / 2 * mArrowScale;
float x = (float) (mRingCenterRadius * Math.cos(0) + bounds.exactCenterX());
float y = (float) (mRingCenterRadius * Math.sin(0) + bounds.exactCenterY());
// Update the path each time. This works around an issue in SKIA
// where concatenating a rotation matrix to a scale matrix
// ignored a starting negative rotation. This appears to have
// been fixed as of API 21.
mArrow.moveTo(0, 0);
mArrow.lineTo(mArrowWidth * mArrowScale, 0);
mArrow.lineTo((mArrowWidth * mArrowScale / 2), (mArrowHeight
* mArrowScale));
mArrow.offset(x - inset, y);
mArrow.close();
// draw a triangle
mArrowPaint.setColor(mColors[mColorIndex]);
c.rotate(startAngle + sweepAngle - ARROW_OFFSET_ANGLE, bounds.exactCenterX(),
bounds.exactCenterY());
c.drawPath(mArrow, mArrowPaint);
}
}
/** * Set the colors the progress spinner alternates between. * * @param colors Array of integers describing the colors. Must be non-<code>null</code>. */
public void setColors(@NonNull int[] colors) {
mColors = colors;
// if colors are reset, make sure to reset the color index as well
setColorIndex(0);
}
/** * @param index Index into the color array of the color to display in * the progress spinner. */
public void setColorIndex(int index) {
mColorIndex = index;
}
/** * Proceed to the next available ring color. This will automatically * wrap back to the beginning of colors. */
public void goToNextColor() {
mColorIndex = (mColorIndex + 1) % (mColors.length);
}
public void setColorFilter(ColorFilter filter) {
mPaint.setColorFilter(filter);
invalidateSelf();
}
/** * @param alpha Set the alpha of the progress spinner and associated arrowhead. */
public void setAlpha(int alpha) {
mAlpha = alpha;
}
/** * @return Current alpha of the progress spinner and arrowhead. */
public int getAlpha() {
return mAlpha;
}
/** * @param strokeWidth Set the stroke width of the progress spinner in pixels. */
public void setStrokeWidth(float strokeWidth) {
mStrokeWidth = strokeWidth;
mPaint.setStrokeWidth(strokeWidth);
invalidateSelf();
}
@SuppressWarnings("unused")
public float getStrokeWidth() {
return mStrokeWidth;
}
@SuppressWarnings("unused")
public void setStartTrim(float startTrim) {
mStartTrim = startTrim;
invalidateSelf();
}
@SuppressWarnings("unused")
public float getStartTrim() {
return mStartTrim;
}
public float getStartingStartTrim() {
return mStartingStartTrim;
}
public float getStartingEndTrim() {
return mStartingEndTrim;
}
@SuppressWarnings("unused")
public void setEndTrim(float endTrim) {
mEndTrim = endTrim;
invalidateSelf();
}
@SuppressWarnings("unused")
public float getEndTrim() {
return mEndTrim;
}
@SuppressWarnings("unused")
public void setRotation(float rotation) {
mRotation = rotation;
invalidateSelf();
}
@SuppressWarnings("unused")
public float getRotation() {
return mRotation;
}
public void setInsets(int width, int height) {
final float minEdge = (float) Math.min(width, height);
float insets;
if (mRingCenterRadius <= 0 || minEdge < 0) {
insets = (float) Math.ceil(mStrokeWidth / 2.0f);
} else {
insets = (float) (minEdge / 2.0f - mRingCenterRadius);
}
mStrokeInset = insets;
}
@SuppressWarnings("unused")
public float getInsets() {
return mStrokeInset;
}
/** * @param centerRadius Inner radius in px of the circle the progress * spinner arc traces. */
public void setCenterRadius(double centerRadius) {
mRingCenterRadius = centerRadius;
}
public double getCenterRadius() {
return mRingCenterRadius;
}
/** * @param show Set to true to show the arrow head on the progress spinner. */
public void setShowArrow(boolean show) {
if (mShowArrow != show) {
mShowArrow = show;
invalidateSelf();
}
}
/** * @param scale Set the scale of the arrowhead for the spinner. */
public void setArrowScale(float scale) {
if (scale != mArrowScale) {
mArrowScale = scale;
invalidateSelf();
}
}
/** * @return The amount the progress spinner is currently rotated, between [0..1]. */
public float getStartingRotation() {
return mStartingRotation;
}
/** * If the start / end trim are offset to begin with, store them so that * animation starts from that offset. */
public void storeOriginals() {
mStartingStartTrim = mStartTrim;
mStartingEndTrim = mEndTrim;
mStartingRotation = mRotation;
}
/** * Reset the progress spinner to default rotation, start and end angles. */
public void resetOriginals() {
mStartingStartTrim = 0;
mStartingEndTrim = 0;
mStartingRotation = 0;
setStartTrim(0);
setEndTrim(0);
setRotation(0);
}
private void invalidateSelf() {
mCallback.invalidateDrawable(null);
}
}
/** * Squishes the interpolation curve into the second half of the animation. */
private static class EndCurveInterpolator extends AccelerateDecelerateInterpolator {
@Override
public float getInterpolation(float input) {
return super.getInterpolation(Math.max(0, (input - 0.5f) * 2.0f));
}
}
/** * Squishes the interpolation curve into the first half of the animation. */
private static class StartCurveInterpolator extends AccelerateDecelerateInterpolator {
@Override
public float getInterpolation(float input) {
return super.getInterpolation(Math.min(1, input * 2.0f));
}
}
}