我试图检测一个TextView对象的onFling事件。下面的代码可以完美地处理onDown事件,但是它无法获取onScroll或onFling事件。指针吗?
感谢package rob.testapp;
import android.app.Activity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends Activity
{
private GestureDetector myGestDetector;
private TextView mainTextView;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myGestDetector = new GestureDetector(this, new SimpleOnGestureListener()
{
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
{
mainTextView.setText("just scroll'n");
return false;
}
@Override
public boolean onDown(MotionEvent e1)
{
mainTextView.setText("on down");
return false;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
{
mainTextView.setText("on fling");
return false;
}
});
mainTextView = (TextView)findViewById(R.id.MainText);
mainTextView.setText("Starting app...");
mainTextView.setOnTouchListener(new View.OnTouchListener()
{
@Override
public boolean onTouch(View v, MotionEvent event)
{
myGestDetector.onTouchEvent(event);
return false;
}
});
}
}
布局只是一个TextView在一个LinearLayout
public boolean onTouch(View v, MotionEvent event)
{
myGestDetector.onTouchEvent(event);
return false;
}
我认为这里应该返回true。您的视图通过返回false来拒绝指针向下的事件,并且因此不接收任何后续事件。
但在我的情况下,它工作。我返回true在textView的内部类,但我从我的TouchEvent返回false。
public class FingureGesture extends Activity implements OnGestureListener,OnDoubleTapListener{
GestureDetector detector;
File sdcard = Environment.getExternalStorageDirectory();
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fingure_gesture);
detector = new GestureDetector(this,this);
textView = (TextView) findViewById(R.id.editText1);
textView.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
Log.i("OnTouch", "Im here ");
detector.onTouchEvent(event);
return false;
}
});
}//end of onCreate
public boolean onDown(MotionEvent e) {
Log.i("onDown ", "x:: "+e.getX()+"ny:: "+e.getY());
return false;
}
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
return false;
}
public boolean onTouchEvent(MotionEvent me){
Log.i(" onTouchEvent", me.toString());
this.detector.onTouchEvent(me);
// return super.onTouchEvent(me);
return true;
}
public void onLongPress(MotionEvent e) {
Log.i(" onLongPress", e.toString());
}
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
float distanceY) {
Log.i("On Scroll ","n#e1 :: "+ e1.getX()+"n#Histo e1.x"+"n#e2 :: "+e2.getX());
return false;
}
public void onShowPress(MotionEvent e) {
Log.i(" onShowPress", e.toString());
}
public boolean onSingleTapUp(MotionEvent e) {
Log.i("onSingleTapUp ", e.toString());
return false;
}
public boolean onDoubleTap(MotionEvent e) {
Log.i(" onDoubleTap", e.toString());
return false;
}
public boolean onDoubleTapEvent(MotionEvent e) {
Log.i(" onDoubleTapEvent", e.toString());
return false;
}
public boolean onSingleTapConfirmed(MotionEvent e) {
Log.i(" onSingleTapConfirmed", e.toString());
return false;
}