import android.widget.ZoomButtonsController.OnZoomListener; //导入依赖的package包/类
public void createZoomControls() {
	ZoomButtonsController zoomButtonsController = new ZoomButtonsController(
			imageView);
	zoomButtonsController.setVisible(true);
	zoomButtonsController.setAutoDismissed(false);
	zoomButtonsController.setOnZoomListener(new OnZoomListener() {

		public void onZoom(boolean zoomIn) {
			matrix = imageView.getImageMatrix();
			if (zoomIn) {
				matrix.postScale(1.05f, 1.05f, 0.5f * size, 0.5f * size);
				imageView.setImageMatrix(matrix);
			} else {
				matrix.postScale(0.95f, 0.95f, 0.5f * size, 0.5f * size);
				imageView.setImageMatrix(matrix);
			}
			imageView.invalidate();
		}

		public void onVisibilityChanged(boolean visible) {
		}
	});
	RelativeLayout.LayoutParams zoomLayoutParams = new RelativeLayout.LayoutParams(
			LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
	zoomLayoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
	zoomLayoutParams.addRule(RelativeLayout.BELOW, R.id.imageViewCrop);
	viewManager.addView(zoomButtonsController.getContainer(),
			zoomLayoutParams);
}