我有一个图像库,我正在尝试对其进行缩放缩放。另外,他们工作得很好。问题是,我不能为我的生活把他们两个绑在一起!我试图在ImageAdapter中绑定ImageZoomView,但无济于事。我应该在用户点击图片时尝试这样做吗?有没有人有任何其他想法? 这是ImageAdapter.class中返回gallery元素的代码:
public View getView(int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(mContext);
Bitmap bitmap = BitmapFactory.decodeResource(mContext.getResources(),mImageIds[position]);
i.setLayoutParams(new Gallery.LayoutParams(300, 450));
i.setScaleType(ImageView.ScaleType.FIT_XY);
i.setBackgroundResource(mGalleryItemBackground);
i.setImageBitmap(bitmap);
return i;
}
这就是我在MainActivity.class中处理它的方式:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gallery);
Gallery g = (Gallery) findViewById(R.id.gallery);
g.setAdapter(new ImageAdapter(this));
Log.i("blah","e ok");
g.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
// mBitmap = ImageAdapter.mImageIds[position];
// mZoomView = (ImageZoomView)findViewById(R.id.zoomview);
// mZoomView.setZoomState(mZoomControl.getZoomState());
// mZoomView.setImage(mBitmap);
// Toast.makeText(MainActivity.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
正如你所看到的,我尝试了一些东西,但我的应用程序总是崩溃。 :(这里的任何帮助将不胜感激。
答案 0 :(得分:2)
您应该在ImageZoomView
方法中创建getView
,假设ImageZoomView是您自己子类化ImageView小部件的小部件。
答案 1 :(得分:1)
我处理它的方式是通过子类化库并重写OnScroll,OnFling和OnTouch将事件提供给scaledetector,并在im在图片的边缘时将它们发送到超类,并在im not时翻译图片。 请记住,这仍然在进行中,但这是我目前对工作解决方案最接近的事情。
Aka可行,但它“古怪”。
private class ScaleListener extends
ScaleGestureDetector.SimpleOnScaleGestureListener {
@Override
public boolean onScale(ScaleGestureDetector detector) {
mScaleFactor = detector.getScaleFactor();
mScaleFactor = Math.max(0.1f, Math.min(mScaleFactor, 5.0f));
Log.d(TAG, "" + mScaleFactor);
scale(mScaleFactor, detector.getFocusX(), detector.getFocusY());
return true;
}
}
和
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
if (matrix == null)
matrix = new Matrix();
matrix.set(getSelectedImageView().getImageMatrix());
} else if (event.getAction() == MotionEvent.ACTION_UP
&& event.getPointerCount() == 0) {
scrolling = 0;
}
mScaleDetector.onTouchEvent(event);
mGestureDetector.onTouchEvent(event);
return super.onTouchEvent(event);
}
和
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
float distanceY) {
if (mScaleDetector.isInProgress()) {
scrolling = 0;
return true;
} else if (isAtRightEdge() && distanceX > 1) {
matrix.postTranslate(0, -distanceY);
getSelectedImageView().setImageMatrix(matrix);
scrolling += distanceX;
return super.onScroll(e1, e2, distanceX, distanceY);
} else if (isAtLeftEdge() && distanceX < -1) {
matrix.postTranslate(0, -distanceY);
getSelectedImageView().setImageMatrix(matrix);
scrolling += distanceX;
return super.onScroll(e1, e2, distanceX, distanceY);
} else {
if (scrolling < 0.1 && scrolling > -0.1) {
matrix.postTranslate(-distanceX, -distanceY);
getSelectedImageView().setImageMatrix(matrix);
return false;
} else {
matrix.postTranslate(0, -distanceY);
getSelectedImageView().setImageMatrix(matrix);
scrolling += distanceX;
return super.onScroll(e1, e2, distanceX, distanceY);
}
}
}