Android onDoupleTap不会开火
我想制作一个对双击做出响应的地图视图,并获取单击位置的地理点,然后将其返回给调用方活动。。我在eclipse emulator中测试我的应用程序,但当我双击映射时,什么都没有发生,我的onDoubleTap()方法也没有进入 这是我的密码Android onDoupleTap不会开火,android,android-mapview,gesture,double-click,Android,Android Mapview,Gesture,Double Click,我想制作一个对双击做出响应的地图视图,并获取单击位置的地理点,然后将其返回给调用方活动。。我在eclipse emulator中测试我的应用程序,但当我双击映射时,什么都没有发生,我的onDoubleTap()方法也没有进入 这是我的密码 public class MYMapActivity extends MapActivity implements GestureDetector.OnGestureListener, GestureDetector.OnDoubleTapListener{
public class MYMapActivity extends MapActivity implements GestureDetector.OnGestureListener, GestureDetector.OnDoubleTapListener{
GestureDetector gestureDetector;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mymapview);
MapView mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
gestureDetector = new GestureDetector(getApplicationContext(), this);
gestureDetector.setOnDoubleTapListener(this);
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
@Override
public boolean onDoubleTap(MotionEvent mev) {
MapView mapView = (MapView) findViewById(R.id.mapview);
Projection p = mapView.getProjection();
GeoPoint geoPoint = p.fromPixels((int) mev.getX(), (int) mev.getY());
int latitude = geoPoint.getLatitudeE6();
int longitude = geoPoint.getLongitudeE6();
Intent resultIntent = new Intent();
resultIntent.putExtra("latitude", latitude);
resultIntent.putExtra("longitude", longitude);
setResult(Activity.RESULT_OK, resultIntent);
finish();
return true;
}
@Override
public boolean onDoubleTapEvent(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// TODO Auto-generated method stub
return false;
}
@Override
public void onLongPress(MotionEvent e) {
// TODO Auto-generated method stub
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
float distanceY) {
// TODO Auto-generated method stub
return false;
}
@Override
public void onShowPress(MotionEvent e) {
// TODO Auto-generated method stub
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
}
有什么错误或遗漏了什么使我的双击永远不会触发???让您的活动只在TestureListener中实现
onCreate()
,然后在onCreate()中执行
gd.setOnDoubleTapListener(new OnDoubleTapListener()
{ //all the override functions of the listener go here //
});
在onCreate()
之后是所有您想要为onTestureListener
覆盖的函数,包括您忘记的这个函数:
@Override
public boolean onTouchEvent(MotionEvent event)
{
return gd.onTouchEvent(event);//return the double tap events
}
我找出了我的代码中缺少的东西,我在这里为任何一个可能遇到同样问题的人编写
第一:
我必须在初始化gestureDetector对象后添加此行
gestureDetector = new GestureDetector(this, this);
gestureDetector.setOnDoubleTapListener(this);
mapView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
});
第二:
我必须在onDown方法中返回true,因为每次单击和双击都会调用它
@Override
public boolean onDown(MotionEvent e) {
return true;
}
这就是在活动中实现doubleTap listener所需的全部内容。抱歉,但也不起作用:(…您的代码和我的代码有什么区别