android - 1 つのアクティビティ内の複数の画像ビューでリスナーをタッチ

Question

アクティビティに複数の imageView を動的に追加し、各 imageView のタッチ イベントを個別に処理したいと考えています。次のような単一のimageViewでこれを行うことができます：

これは活動です：

public class Touch extends Activity implements OnTouchListener {
private static final String TAG = "Touch";
Matrix matrix = new Matrix();
Matrix savedMatrix = new Matrix();
 private PointF start = new PointF();
 private PointF mid = new PointF();
 private float oldDist = 1f;

// We can be in one of these 3 states
static final int NONE = 0; 
static final int DRAG = 1;
static final int ZOOM = 2;
int mode = NONE; 

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    ImageView view = (ImageView) findViewById(R.id.imageView);
    view.setOnTouchListener(this);
}

public boolean onTouch(View v, MotionEvent event)

{
    ImageView view = (ImageView) v;
    // Dump touch event to log
    dumpEvent(event);

    // Handle touch events here... 
    switch (event.getAction() & MotionEvent.ACTION_MASK)
    { 

    case MotionEvent.ACTION_DOWN:

        savedMatrix.set(matrix);
        start.set(event.getX(), event.getY());
        Log.d(TAG, "mode=DRAG" );
        mode = DRAG;
        break;

        case MotionEvent.ACTION_UP:
        case MotionEvent.ACTION_POINTER_UP:
        mode = NONE;
        Log.d(TAG, "mode=NONE" );
        break;

        case MotionEvent.ACTION_MOVE:
        if (mode == DRAG) {
        matrix.set(savedMatrix);
        matrix.postTranslate(event.getX() - start.x,
        event.getY() - start.y);
        }

        else if (mode == ZOOM) {
            float newDist = spacing(event);
            Log.d(TAG, "newDist=" + newDist);
            if (newDist > 10f) {
            matrix.set(savedMatrix);
            float scale = newDist / oldDist;
            matrix.postScale(scale, scale, mid.x, mid.y);
            }
            }
        break;

        case MotionEvent.ACTION_POINTER_DOWN:
            oldDist = spacing(event);
            Log.d(TAG, "oldDist=" + oldDist);
            if (oldDist > 10f) {
            savedMatrix.set(matrix);
            midPoint(mid, event);
            mode = ZOOM;
            Log.d(TAG, "mode=ZOOM" );
            }
            break;
    }

    view.setImageMatrix(matrix); 
    return true; // indicate event was handled
}

/** Show an event in the LogCat view, for debugging */
private void dumpEvent(MotionEvent event) {
    String names[] = { "DOWN", "UP", "MOVE", "CANCEL", "OUTSIDE",
            "POINTER_DOWN", "POINTER_UP", "7?", "8?", "9?" };
    StringBuilder sb = new StringBuilder();
    int action = event.getAction();
    int actionCode = action & MotionEvent.ACTION_MASK;
    sb.append("event ACTION_").append(names[actionCode]);
    if (actionCode == MotionEvent.ACTION_POINTER_DOWN
            || actionCode == MotionEvent.ACTION_POINTER_UP) {
        sb.append("(pid ").append(
                action >> MotionEvent.ACTION_POINTER_ID_SHIFT);
        sb.append(")");
    }
    sb.append("[");
    for (int i = 0; i < event.getPointerCount(); i++) {
        sb.append("#").append(i);
        sb.append("(pid ").append(event.getPointerId(i));
        sb.append(")=").append((int) event.getX(i));
        sb.append(",").append((int) event.getY(i));
        if (i + 1 < event.getPointerCount())
            sb.append(";");
    }
    sb.append("]");
    Log.d(TAG, sb.toString());
}

private float spacing(MotionEvent event) {
    float x = event.getX(0) - event.getX(1);
    float y = event.getY(0) - event.getY(1);
    return FloatMath.sqrt(x * x + y * y);
    }

private void midPoint(PointF point, MotionEvent event) {
    float x = event.getX(0) + event.getX(1);
    float y = event.getY(0) + event.getY(1);
    point.set(x / 2, y / 2);
    }

}

これは main.xml です。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout`xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ImageView android:id="@+id/imageView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:src="@drawable/basketball"
android:scaleType="matrix"/>
</LinearLayout>

しかし、その下に別の画像を追加して幅と高さを「wrap_content」にすると、指定された領域に移動するだけです。以下は、複数のタッチイベントを追加しようとしたときに得られる結果の画像のリンクです:

https://www.dropbox.com/s/vymbsv88fqm26xx/SC20121118-231359.png