android USES gesturedetector gesture recognition examples to share
- 2020-05-24 06:05:52
- OfStack
public class MyGestureLintener extends SimpleOnGestureListener {
private Context context;
public MyGestureLintener(Context context) {
super();
this.context = context;
}
// Click, the touch screen will trigger immediately when pressed
/*@Override
public boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
Toast.makeText(context, "Down " + e.getAction(), Toast.LENGTH_SHORT)
.show();
return true;
}*/
// Double - click, finger on the touch screen quickly click 2 When the trigger
@Override
public boolean onDoubleTap(MotionEvent e) {
// TODO Auto-generated method stub
return super.onDoubleTap(e);
}
// Double-click the press down and lift each trigger 1 time
@Override
public boolean onDoubleTapEvent(MotionEvent e) {
// TODO Auto-generated method stub
return super.onDoubleTapEvent(e);
}
// Sliding, pressing the touch screen and then moving quickly and lifting, will first trigger the rolling gesture, followed by the trigger 1 A sliding gesture
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// TODO Auto-generated method stub
return super.onFling(e1, e2, velocityX, velocityY);
}
// Long press, touch screen press after neither lifting nor moving, over 1 Triggered after a period of time
@Override
public void onLongPress(MotionEvent e) {
// TODO Auto-generated method stub
Toast.makeText(context, "LONG " + e.getAction(), Toast.LENGTH_SHORT)
.show();
}
// Scroll, touch screen press and move
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
float distanceY) {
Toast.makeText(context, "onScroll " + e2.getAction(), Toast.LENGTH_SHORT)
.show();
return true;
}
// A short press, which is held down by the touch screen for a moment and then raised, triggers the gesture, but not if it is raised quickly
@Override
public void onShowPress(MotionEvent e) {
// TODO Auto-generated method stub
Toast.makeText(context, "Show " + e.getAction(), Toast.LENGTH_SHORT)
.show();
}
// Click ok, and press down and up quickly, but not continuously click first 2 Under the
/*@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
// TODO Auto-generated method stub
Toast.makeText(context, "onSingleTapConfirmed " + e.getAction(), Toast.LENGTH_SHORT)
.show();
return true;
}*/
// Lift and trigger when finger leaves touch screen ( Long presses, rolls, and slides will not trigger this gesture )
/*@Override
public boolean onSingleTapUp(MotionEvent e) {
// TODO Auto-generated method stub
Toast.makeText(context, "onSingleTapUp " + e.getAction(), Toast.LENGTH_SHORT)
.show();
return true;
}*/
public class MainActivity extends Activity {
private GestureDetector mGestureDetector;// Gestures object
private MyGestureLintener myGestureLintener;// Interface object for gesture listening
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myGestureLintener = new MyGestureLintener(this);
// The construction of gesture objects
mGestureDetector = new GestureDetector(this,
myGestureLintener);
}
/**GestureDetector Of the class onTouchEvent Methods are used to identify different gestures */
@Override
public boolean onTouchEvent(MotionEvent event) {
boolean b = false;
int i = event.getAction();
int j = MotionEvent.ACTION_MOVE;
System.out.println(i+"<----------------->"+j);
b = mGestureDetector.onTouchEvent(event);
if (b) {
Intent in = new Intent();
in.setClass(this, testActivity.class);
startActivity(in);
}
return b;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}