ListViewソース学習ノート[オリジナル]

public class ListView extends AbsListView {
    /**
     * Used to indicate a no preference for a position type.
　　　*  
     */
    static final int NO_POSITION = -1;

    /**
     * Normal list that does not indicate choices
　　　*  ( )
 */

    public static final int CHOICE_MODE_NONE = 0;

    /**
     * The list allows up to one choice
　　　*  
     */
    public static final int CHOICE_MODE_SINGLE = 1;

    /**
     * The list allows multiple choices
　　　*  
     */
    public static final int CHOICE_MODE_MULTIPLE = 2;

    /**
     * When arrow scrolling, ListView will never scroll more than this factor times the height of the list.
     * 
     */
    private static final float MAX_SCROLL_FACTOR = 0.33f;

    /**
     * When arrow scrolling, need a certain amount of pixels to preview next items. This is usually the fading edge,
     * but if that is small enough, we want to make sure we preview at least this many pixels.
     * 
     */
    private static final int MIN_SCROLL_PREVIEW_PIXELS = 2;

public void setSelection(int position)

public void setCacheColorHint(int color)

public void setChoiceMode(int choiceMode)

public boolean performItemClick(View view, int position, long id)

public void setItemChecked(int position, boolean value)

private boolean mIsCacheColorOpaque;

@Override
public boolean isOpaque() {
　　return (mCachingStarted && mIsCacheColorOpaque && mDividerIsOpaque &&
　　　　hasOpaqueScrollbars()) || super.isOpaque();
}

@Override
public void setCacheColorHint(int color) {
　　final boolean opaque = (color >>> 24) == 0xFF;
　　mIsCacheColorOpaque = opaque;
　　if (opaque) {
　　　　if (mDividerPaint == null) {
　　　　　　mDividerPaint = new Paint();
　　　　}
　　　　mDividerPaint.setColor(color);
　　}
　　super.setCacheColorHint(color);
}

/**
 * SparseBooleanArrays map integers to booleans. Unlike a normal array of booleans there can be gaps in the indices.
 * It is intended to be more efficient than using a HashMap to map Integers to Booleans.
 *   Integer   Boolean  ,   SparseBooleanArrays   HashMap  .
 */
private SparseBooleanArray mCheckStates;
private LongSparseArray<Boolean> mCheckedIdStates;

public void setChoiceMode(int choiceMode) {
　　mChoiceMode = choiceMode;
　　if (mChoiceMode != CHOICE_MODE_NONE) {
　　　　if (mCheckStates == null) {
　　　　　　mCheckStates = new SparseBooleanArray();
　　　　}
　　　　if (mCheckedIdStates == null && mAdapter != null && mAdapter.hasStableIds()) {
　　　　　　mCheckedIdStates = new LongSparseArray<Boolean>();
　　　　}
　　}
}