当我触摸屏幕的左侧或右侧时,我想在ImageView中更改图像(我从网址获取的图像)。我尝试使用TouchListener但是我收到有关dispatchTouchEvent的错误。
使用图库视图不是解决方案,因为我希望图像以全屏显示。
这是我使用的代码。
public class Prova4Activity extends Activity implements OnTouchListener {
/** Called when the activity is first created. */
ImageView image;
Bitmap trash = loadImageFromUrl("http://www.televideo.rai.it/televideo/pub/tt4web/Nazionale/16_9_page-100.6.png");
ImageView imgpag;
@Override
public boolean onTouch(View v, MotionEvent event) {
if(event.getAction() == MotionEvent.EDGE_RIGHT){
trash.recycle();
trash = null;
trash = loadImageFromUrl("http://www.televideo.rai.it/televideo/pub/tt4web/Nazionale/16_9_page-100.6.png");
image.setImageBitmap(trash);
}else if(event.getAction() == MotionEvent.EDGE_LEFT){
trash.recycle();
trash = null;
trash = loadImageFromUrl("http://www.televideo.rai.it/televideo/pub/tt4web/Nazionale/16_9_page-100.5.png");
imgpag.setImageBitmap(trash);
}
imgpag.setScaleType(ScaleType.FIT_XY);
return false;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
imgpag = (ImageView)findViewById (R.id.imgpag);
imgpag.setImageBitmap(trash);
imgpag.setOnTouchListener(this);
}
}
在logcat中,我多次看到以下消息:
Key dispatching timed out sending to com.namemyapp Current state {{null Window{439f0e10 com.namemyapp Continuing to wait for key to be dispatched