方法は、私はこのエラーを持っているonTouch

Question

とスーパータイプからメソッドをオーバーライドまたは実装していません。 は私がなぜ...

を理解していないこれは私のTouchListenerImpl.javaです：

class TouchListenerImpl implements View.OnTouchListener { 

    private boolean movingDownL, movingDownR, movingLeft, movingRight, movingSuccessL, movingSuccessR = false; 
    private Point oldCoordsL, oldCoordsR, startPointL, startPointR = new Point(0, 0); 
    private boolean admin_touch = false; 
    private OnLTouch callback; 

    void setCallback(OnLTouch c) { 
     callback = c; 
    } 

    interface OnLTouch { 
     void lTouchSuccess(); 
    } 

    @Override 
    public boolean onTouch(View v, MotionEvent event) { 

     Log.d("debugTouch", "onTouch"); 

     int pIndexL = event.findPointerIndex(event.getPointerId(0)); 
     int pIndexR = 0; 

     if(event.getPointerCount() > 1) pIndexR = event.findPointerIndex(event.getPointerId(1)); 

     if(event.getPointerCount() > 1 && event.getX(pIndexL) > event.getX(pIndexR)) { 
      int tmp = pIndexR; 
      pIndexR = pIndexL; 
      pIndexL = tmp; 
     } 

     switch (event.getAction()) { 
      case MotionEvent.ACTION_DOWN: 
       movingDownL = true; 
       movingDownR = true; 
       movingSuccessL = false; 
       movingSuccessR = false; 

       if(event.getPointerCount() > 1) { 
        startPointR = new Point((int) event.getX(pIndexR), (int) event.getY(pIndexR)); 
        oldCoordsR = new Point((int) event.getX(pIndexR), (int) event.getY(pIndexR)); 
       } 

       startPointL = new Point((int) event.getX(pIndexL), (int) event.getY(pIndexL)); 
       oldCoordsL = new Point((int) event.getX(pIndexL), (int) event.getY(pIndexL)); 
       break; 
      case MotionEvent.ACTION_MOVE: 
       int downMinDistance = 300; 
       int lnrInaccuracy = 10; 
       int downInaccuracy = 30; 
       if(event.getPointerCount() > 1) { 
        if(!movingDownR) { 
         if(Math.abs(oldCoordsR.x - event.getX(pIndexR)) < downInaccuracy && 
           oldCoordsR.y < event.getY(pIndexR)) break; 
         if(Math.abs(oldCoordsR.y - event.getY(pIndexR)) < lnrInaccuracy && 
           oldCoordsR.x > event.getX(pIndexR) && !movingRight) { 
          movingRight = true; 
          startPointR = new Point(new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR))); 
         } 
        } else { 
         if (Math.abs(oldCoordsR.x - event.getX(pIndexR)) > downInaccuracy || 
           oldCoordsR.y < event.getY(pIndexR)) { 
          movingDownR = false; 
          break; 
         } else if(findDistance(startPointR, 
           new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR))) >= downMinDistance){ 
          movingDownR = false; 
         } 
        } 
       } 

       if(!movingDownL) { 
        if(Math.abs(oldCoordsL.x - event.getX(pIndexL)) < downInaccuracy && 
          oldCoordsL.y < event.getY(pIndexL)) break; 
        if(Math.abs(oldCoordsL.y - event.getY(pIndexL)) < lnrInaccuracy && 
          oldCoordsL.x < event.getX(pIndexL) && !movingLeft) { 
         movingLeft = true; 
         startPointL = new Point(new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL))); 
        } 
       }else { 
        if (Math.abs(oldCoordsL.x - event.getX(pIndexL)) > downInaccuracy || 
          oldCoordsL.y > event.getY(pIndexL)) { 
         movingDownL = false; 
         break; 
        } else if(findDistance(startPointL, 
          new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL))) >= downMinDistance){ 
         movingDownL = false; 
        } 
       } 

       int lnrMinDistance = 50; 
       if(movingLeft) { 
        if (Math.abs(oldCoordsL.y - event.getY(pIndexL)) > lnrInaccuracy || 
          oldCoordsL.x > event.getX(pIndexL)) { 
         movingLeft = false; 
         break; 
        } else if(findDistance(startPointL, 
          new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL))) >= lnrMinDistance) { 
         movingLeft = false; 
         movingSuccessL = true; 
        } 
       } 

       if(movingRight) { 
        if (Math.abs(oldCoordsR.y - event.getY(pIndexR)) > lnrInaccuracy || 
          oldCoordsR.x < event.getX(pIndexR)) { 
         movingRight = false; 
         break; 
        } else if(findDistance(startPointR, 
          new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR))) >= lnrMinDistance) { 
         movingRight = false; 
         movingSuccessR = true; 
        } 
       } 

       if(movingSuccessL && movingSuccessR) { 
        if (!admin_touch) 
        { 
         admin_touch = true; 

         if (callback != null) 
          callback.lTouchSuccess(); 
        } 
       } 

       oldCoordsL = new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL)); 
       oldCoordsR = new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR)); 

       break; 
      case MotionEvent.ACTION_UP: 
       movingDownL = false; 
       movingDownR = false; 
       movingLeft = false; 
       movingRight = false; 
       break; 
      default: 
       return false; 
     } 
     return true; 
    } 

    private double findDistance(Point p1, Point p2) { 
     return Math.sqrt(Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2)); 
    } 
} 

私はTouchListenerImpl（TESTActivity.java）を呼び出す場所です：

public class TESTActivity extends AppCompatActivity { 

    TouchListenerImpl imp = new TouchListenerImpl(); 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_test); 

     imp.setCallback(new TouchListenerImpl.OnLTouch() { 
      @Override 
      public void lTouchSuccess() { 
       Log.d("debug", "success"); 
      } 
     }); 
    } 

    @Override 
    public boolean onTouch(View v, MotionEvent event) { 
     return imp.onTouch(v, event); 
    } 


} 

Answer 1

@Overrideを告げるためですIDE "このメソッドは、私のスーパータイプのメソッドを置き換える、または拡張するだけです" しかし、onTouchは存在しませんActivityまたはAppCompatActivity。存在する場合OnTouchListener

TestActivity implements View.OnTouchListenerに変更すると問題が解決します。

しかし、これは新たな問題を作成することになるでしょう - onTouchは何をやろうとしていますか？このメソッドのコードは呼び出されない限り決して実行されませんが、TestActivity.thisはタッチリスナーとして使用されることはありません。