User input I. Detection Common gestures (1), gestures

User input I. Detection Common gestures (1), gestures

Refer:

Http://blog.csdn.net/qq418716640/article/details/8508973
Http://www.cnblogs.com/mengdd/p/3335508.html

Effect: one finger (all gesture events) and (partial events );

A. All gestures

Activity_main.xml

<TextView
Android: id = "@ + id/gesture"
Android: layout_width = "match_parent"
Android: layout_height = "150dp"
Android: gravity = "center"
Android: text = "Click gesture changes"/>


<TextView
Android: id = "@ + id/doubleTap"
Android: layout_width = "match_parent"
Android: layout_height = "150dp"
Android: gravity = "center"
Android: text = "double-click gesture changes"/>

 

MainActivity. java

Public class MainActivity extends Activity {

Private static final String LOG_TAG = "HelloGesture ";
Private GestureDetector mGestureDetector = null;
Private TextView mGestureTextView = null;
Private TextView mDoubleTapTextView = null;

@ Override
Protected void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. activity_main );
MGestureTextView = (TextView) findViewById (R. id. gesture );
MDoubleTapTextView = (TextView) findViewById (R. id. doubleTap );
// Construct the GestureDetector object and pass in the listener object
MGestureDetector = new GestureDetector (this, mOnGestureListener );
// Input the listener object by double-clicking
MGestureDetector. setOnDoubleTapListener (mDoubleTapListener );

}

@ Override
Public boolean onTouchEvent (MotionEvent event ){
// Pass the event to the gesture detection object in the onTouchEvent method. Otherwise, the callback function in the gesture listening object will not be called.
MGestureDetector. onTouchEvent (event );
Return super. onTouchEvent (event );
}

Private OnGestureListener mOnGestureListener = new OnGestureListener (){

@ Override
Public boolean onSingleTapUp (MotionEvent e ){
Log. I (LOG_TAG, "onSingleTapUp:" + e. toString ());
MGestureTextView. setText ("onSingleTapUp :");
Return false;

}

@ Override
Public void onShowPress (MotionEvent e ){
Log. I (LOG_TAG, "onShowPress:" + e. toString ());
MGestureTextView. setText ("onShowPress :");
}

@ Override
Public boolean onScroll (MotionEvent e1, MotionEvent e2,
Float distanceX, float distanceY ){
Log. I (LOG_TAG, "onScroll:" + e1.toString () + "," + e2.toString ());
MGestureTextView. setText ("onScroll ");
Return false;
}

@ Override
Public void onLongPress (MotionEvent e ){
Log. I (LOG_TAG, "onLongPress:" + e. toString ());
MGestureTextView. setText ("onLongPress :");
}

@ Override
Public boolean onFling (MotionEvent e1, MotionEvent e2, float velocityX,
Float velocityY ){
Log. I (LOG_TAG, "onFling:" + e1.toString () + "," + e2.toString ());
MGestureTextView. setText ("onFling ");
Return false;
}

@ Override
Public boolean onDown (MotionEvent e ){

Log. I (LOG_TAG, "onDown:" + e. toString ());
MGestureTextView. setText ("onDown :");

Return false;

}
};

private OnDoubleTapListener mDoubleTapListener = new OnDoubleTapListener() {

        @Override
        public boolean onSingleTapConfirmed(MotionEvent e) {
            Log.i("LOG_TAG", "onSingleTapConfirmed: " + e.toString());
            mDoubleTapTextView.setText("onSingleTapConfirmed: ");
            return false;
        }

        @Override
        public boolean onDoubleTapEvent(MotionEvent e) {
            Log.i("LOG_TAG", "onDoubleTapEvent: " + e.toString());
            mDoubleTapTextView.setText("onDoubleTapEvent: ");
            return false;
        }

        @Override
        public boolean onDoubleTap(MotionEvent e) {
            Log.i("LOG_TAG", "onDoubleTap: " + e.toString());
            mDoubleTapTextView.setText("onDoubleTap: ");
            return false;
        }
    };
}

 

B. Some gestures

If you only want to handle a few gestures, You can inherit the GestureDetector. SimpleOnGestureListener class instead of implementing
GestureDetector. OnGestureListener Interface

MainActivity. java

Public class MainActivity extends Activity {


Private GestureDetector mGestureDetector = null;
Private TextView mGestureTextView = null;
Private TextView mDoubleTapTextView = null;

@ Override
Protected void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. activity_main );
MGestureTextView = (TextView) findViewById (R. id. gesture );
MDoubleTapTextView = (TextView) findViewById (R. id. doubleTap );
// Construct the GestureDetector object and pass in the listener object
MGestureDetector = new GestureDetector (this, new MyGestureListener ());
// Input the listener object by double-clicking


}

@ Override
Public boolean onTouchEvent (MotionEvent event ){
// Pass the event to the gesture detection object in the onTouchEvent method. Otherwise, the callback function in the gesture listening object will not be called.
This. mGestureDetector. onTouchEvent (event );
Return super. onTouchEvent (event );
}
Class MyGestureListener extends GestureDetector. SimpleOnGestureListener {
Private static final String DEBUG_TAG = "Gestures ";

@ Override
Public boolean onFling (MotionEvent e1, MotionEvent e2, float velocityX,
Float velocityY ){
Log. d (DEBUG_TAG, "onFling:" + e1.toString () + "," + e2.toString ());
MGestureTextView. setText ("onFling ");
Return false;
}

@ Override
Public boolean onDown (MotionEvent e ){
Log. d (DEBUG_TAG, "onDown:" + e. toString ());
MGestureTextView. setText ("onDown :");
Return false;

}
}

}