放大Harism页面卷曲库Android

我正在尝试在harism页面上添加缩放手势

---

我已经重写了onTouchEventMotionEvent事件，并创建了scalegestruedetector.OnScaleGestureListener的实例来检测缩放事件。这一部分已经成功实现，如我的示例代码中的1个SimpleOnScaleGetStureListener类所示。现在我需要根据缩放比例绘制位图，但我无法实现它，因为日志显示2 java.lang.IllegalArgumentException:x+宽度必须尝试在此处添加任何数字以进行缩放

int imageWidth=r.width-边框*2+**30**；

我给结果加了30个look

---

我希望它能对您有所帮助。

我通过将边距设置为负值来处理下面的代码

private class SizeChangedObserver implements CurlView.SizeChangedObserver {
    @Override
    public void onSizeChanged(int w, int h) {
        if (w > h) {
            mCurlView.setViewMode(CurlView.SHOW_TWO_PAGES);
            mCurlView.setMargins(-.5f, -.5f, -.5f, -.5f);//Zoom in
            //mCurlView.setMargins(.01f, .01f, .01f, .01f); //zoom Out
        } else {
            mCurlView.setViewMode(CurlView.SHOW_ONE_PAGE);
            mCurlView.setMargins(.01f, .01f, .01f, .01f);
        }
    }
}

---

嘿，放大后我无法滚动页面您有任何输入吗？嘿，放大后我无法滚动页面您有任何输入吗？

  12-09 14:26:02.770: E/AndroidRuntime(7470): java.lang.IllegalArgumentException: x + width must be <= bitmap.width()
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.graphics.Bitmap.createBitmap(Bitmap.java:533)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at projectname.LPMagHome$simpleOnScaleGestureListener.onScale(LPMagHome.java:620)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.ScaleGestureDetector.onTouchEvent(ScaleGestureDetector.java:300)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at projectname.LPMagHome.onTouchEvent(LPMagHome.java:592)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.app.Activity.dispatchTouchEvent(Activity.java:2494)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2063)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.View.dispatchPointerEvent(View.java:7520)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3376)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3308)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4402)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4380)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4484)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:163)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:4452)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:4503)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.Choreographer.doCallbacks(Choreographer.java:555)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.Choreographer.doFrame(Choreographer.java:523)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.os.Handler.handleCallback(Handler.java:615)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.os.Handler.dispatchMessage(Handler.java:92)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.os.Looper.loop(Looper.java:137)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at android.app.ActivityThread.main(ActivityThread.java:4898)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at java.lang.reflect.Method.invokeNative(Native Method)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at java.lang.reflect.Method.invoke(Method.java:511)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
    12-09 14:26:02.770: E/AndroidRuntime(7470):     at dalvik.system.NativeStart.main(Native Method)

public class Touch extends Activity implements OnTouchListener {
private static final String TAG = "Touch";

private static final float MIN_ZOOM = 1.0f;
private static final float MAX_ZOOM = 5.0f;

// These matrices will be used to move and zoom image
Matrix matrix = new Matrix();
Matrix savedMatrix = new Matrix();

// 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;

// Remember some things for zooming
PointF start = new PointF();
PointF mid = new PointF();
float oldDist = 1f;

@Override
public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.main);
   ImageView view = (ImageView) findViewById(R.id.image);
   //view.setLayoutParams(new GridView.LayoutParams(85, 85));
  // view.setScaleType(ImageView.ScaleType.FIT_CENTER);
   view.setOnTouchListener(this);   
}

public boolean onTouch(View v, MotionEvent event) {
   ImageView view = (ImageView) v;
   view.setScaleType(ImageView.ScaleType.MATRIX);
   float scale;

   // Dump touch event to log
   dumpEvent(event);

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

   case MotionEvent.ACTION_DOWN: //first finger down only
      savedMatrix.set(matrix);
      start.set(event.getX(), event.getY());
      Log.d(TAG, "mode=DRAG" );
      mode = DRAG;
      Log.i("saran","mode === drag");
      break;
   case MotionEvent.ACTION_UP: //first finger lifted
       Log.i("saran","action up");
   case MotionEvent.ACTION_POINTER_UP: //second finger lifted
      mode = NONE;
      Log.i("saran", "mode=NONE" );
      break;
   case MotionEvent.ACTION_POINTER_DOWN: //second finger down
      oldDist = spacing(event);
      Log.i("saran", "oldDist=" + oldDist);
      if (oldDist > 5f) {
         savedMatrix.set(matrix);
         midPoint(mid, event);
         mode = ZOOM;
         Log.i("saran", "mode=ZOOM" );
      }
      break;

   case MotionEvent.ACTION_MOVE: 
      if (mode == DRAG) { //movement of first finger
         matrix.set(savedMatrix);
         if (view.getLeft() >= -392){
            matrix.postTranslate(event.getX() - start.x, event.getY() - start.y);
         }
         Log.i("saran", "action move.....");
      }
      else if (mode == ZOOM) { //pinch zooming
         float newDist = spacing(event);
         Log.d(TAG, "newDist=" + newDist);
         if (newDist > 5f) {
            matrix.set(savedMatrix);
            scale = newDist / oldDist; //**//thinking i need to play around with this value to limit it**
            matrix.postScale(scale, scale, mid.x, mid.y);
         }
         Log.i("saran", "zoom.......");
      }
      break;
   }

   // Perform the transformation
   view.setImageMatrix(matrix);

   return true; // indicate event was handled
}

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);
}

/** 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 class SizeChangedObserver implements CurlView.SizeChangedObserver {
    @Override
    public void onSizeChanged(int w, int h) {
        if (w > h) {
            mCurlView.setViewMode(CurlView.SHOW_TWO_PAGES);
            mCurlView.setMargins(-.5f, -.5f, -.5f, -.5f);//Zoom in
            //mCurlView.setMargins(.01f, .01f, .01f, .01f); //zoom Out
        } else {
            mCurlView.setViewMode(CurlView.SHOW_ONE_PAGE);
            mCurlView.setMargins(.01f, .01f, .01f, .01f);
        }
    }
}