AndroidカスタムView横ページ
5953 ワード
原理見:ページをめくる効果原理実現のページをめくる試み
自分のカスタムViewプロジェクトアドレス:https://github.com/aa86799/MyCustomView(start&forkへようこそ)
本住所:https://github.com/aa86799/MyCustomView/tree/master/turnpage
package com.stone.turnpage.view;
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
/**
* author : stone
* email : [email protected]
* time : 16/7/8 10 35
*/
public class HorizonTurnPageView extends View {
private List mBitmaps;
private float mClipX; //
private float mCurPointX;// X
private float mAutoAreaLeft, mAutoAreaRight; //
private boolean mIsLastPage; //
private boolean mIsNextPage; //
private int mPageIndex;
private Runnable mMsgCallback;
private Handler mHandler = new Handler();
public HorizonTurnPageView(Context context) {
super(context);
// ViewConfiguration.get(context).getScaledTouchSlop()
}
public void setBitmaps(List bitmaps) {
if (null == bitmaps || bitmaps.size() == 0) return;
this.mBitmaps = bitmaps;
System.out.println("setBitmaps");
invalidate();
}
/**
* : ( )
*/
private void initBitmaps() {
if (mBitmaps == null) {
return;
}
List temp = new ArrayList();
for (int i = mBitmaps.size() - 1; i >= 0; i--) {
Bitmap bitmap = Bitmap.createScaledBitmap(mBitmaps.get(i), getWidth(), getHeight(), true);
temp.add(bitmap);
}
mBitmaps = temp;
}
private void drawBitmaps(Canvas canvas) {
/* for (int i = 0; i < mBitmaps.size(); i++) {
// canvas.save();
if (i == mBitmaps.size() - 1) {// ( )
canvas.clipRect(0, 0, mClipX, getHeight());
}
canvas.drawBitmap(mBitmaps.get(i), 0, 0, null);
// canvas.restore();
}*/
/*
, ,
*/
mIsLastPage = false;
mPageIndex = mPageIndex < 0 ? 0 : mPageIndex;
mPageIndex = mPageIndex > mBitmaps.size() ? mBitmaps.size() : mPageIndex;
//
int start = mBitmaps.size() - 2 - mPageIndex;//mBitmaps.size() - 2
int end = mBitmaps.size() - mPageIndex; // end - start = 2
/*
* 0
*/
if (start < 0) {
mIsLastPage = true; // mPageIndex = size - 1
showToast(" ");
//
start = 0;
end = 1;
}
for (int i = start; i < end; i++) {//end - start = 2
if (!mIsLastPage && i == end - 1) {
canvas.clipRect(0, 0, mClipX, getHeight()); //
}
canvas.drawBitmap(mBitmaps.get(i), 0, 0, null);
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
mIsNextPage = true;
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
mCurPointX = event.getX();
if (mCurPointX < mAutoAreaLeft) {
mIsNextPage = false; //
mPageIndex--;
mClipX = mCurPointX;
invalidate();
}
break;
case MotionEvent.ACTION_MOVE:
mClipX = event.getX();
invalidate();
break;
case MotionEvent.ACTION_UP:
judgeSlideAuto();
/*
*
*
* clip , judgeSlideAuto
*/
if (!mIsLastPage && mIsNextPage && mClipX <= 0) {
mPageIndex++;
mClipX = getWidth();
invalidate();
}
break;
}
return true;
}
/**
* :
*/
private void judgeSlideAuto() {
if (mClipX < mAutoAreaLeft) {// 1/5 w
while (mClipX > 0) {
mClipX--;
invalidate();
}
} else if (mClipX > mAutoAreaRight) {// 4/5 w
while (mClipX < getWidth()) {
mClipX++;
invalidate();
}
}
}
/*
onMeasure , ViewGroup , onLayout
*/
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
System.out.println("onSizeChanged");
initBitmaps();
mClipX = getWidth();
mAutoAreaLeft = getWidth() / 5f;
mAutoAreaRight = getWidth() / 5f * 4;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (null == mBitmaps || mBitmaps.size() == 0) {
return;
}
drawBitmaps(canvas);
}
private void showToast(final Object msg) {
mHandler.removeCallbacksAndMessages(null);
mMsgCallback = new Runnable() {
@Override
public void run() {
Toast.makeText(getContext(), msg.toString(), Toast.LENGTH_SHORT).show();
}
};
mHandler.postDelayed(mMsgCallback, 200);
}
}
自分のカスタムViewプロジェクトアドレス:https://github.com/aa86799/MyCustomView(start&forkへようこそ)
本住所:https://github.com/aa86799/MyCustomView/tree/master/turnpage