Java Android：onTouchListener无法正常工作

Question

我是新编写Apps for Java。我设法构建了一个小测试应用程序，其中一个SurfaceView不断在基于线程的循环中重绘。

现在我设法将所有这些图形化的东西都处理出来，尽管我想实现一个onTouchListener。我没有，因为我被谷歌告知，并把它写进我的执行OnTouchListener和我SurfaceView设置为OnTouchListener（直接主要活动：Panel.p.setOnTouchListener和间接：查看view = findViewById(R.id.SurfaceView01);view.setOnTouchListener(this);)

我得到了在两种情况下的结果，虽然我的应用程序设置。到'Fullscreen'只包含一个对Panel的引用

我不知道在那里的错误可能是，一切正常，但onTouchListener。我要添加所有的文件是相关的这里的问题希望有人知道我做错了什么。

XML：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" > 


<com.example.test.Panel android:id="@+id/SurfaceView01" android:layout_width="wrap_content" 
android:layout_height="wrap_content" android:maxHeight="40dip"> 
</com.example.test.Panel> 

主要活动：

//'Constructor' 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); 
    setContentView(R.layout.activity_main); 
    //View view = findViewById(R.id.SurfaceView01); 
    //view.setOnTouchListener(this); 
    Panel.p.setOnTouchListener(this); 
} 

//Called when App's being closed 
@Override 
public void onPause(){ 
    super.onPause(); 
    CanvasThread._run = false; 
} 

//Touching - Somehow doesn't seem to want to do anything :(
@Override 
public boolean onTouch (View v, MotionEvent event){ 
    int x = (int)event.getX(); 
    int y = (int)event.getY(); 
    CanvasThread.scene.bird.setDestination(x, y); 
    //Pressing 
    if(event.getAction()==MotionEvent.ACTION_DOWN){} 
    //Releasing 
    if(event.getAction()==MotionEvent.ACTION_UP){} 
    //Moving 
    if(event.getAction()==MotionEvent.ACTION_MOVE){} 
    return false; 
} 


@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    getMenuInflater().inflate(R.menu.activity_main, menu); 
    return true; 
} 

面板（SurfaceView）：

CanvasThread canvasthread; 
public static Panel p; 

@Override 
public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) { 
} 


@Override 
public void surfaceCreated(SurfaceHolder holder) { 
    canvasthread.setRunning(true); 
    canvasthread.start(); 
} 


@Override 
public void surfaceDestroyed(SurfaceHolder holder) { 
     boolean retry = true; 
     canvasthread.setRunning(false); 
     while (retry) { 
       try { 
         canvasthread.join(); 
         retry = false; 
       } catch (InterruptedException e) {} 
     } 

} 


public Panel(Context context, AttributeSet attrs) { 
    super(context, attrs); 
    getHolder().addCallback(this); 
    canvasthread = new CanvasThread(getHolder(), this); 
    setFocusable(true); 
    p = this; 
} 


public void onDraw(Canvas canvas, Bitmap img, int x, int y) { 
    Paint paint = new Paint(); 
    canvas.drawBitmap(img, x, y, null); 
} 

public void setBlack(Canvas canvas){ 
    canvas.drawColor(Color.BLACK); 
} 


//-----------Image Management---------------------- 
public Bitmap chest = BitmapFactory.decodeResource(getResources(), R.drawable.chest); 
public Bitmap stairs = BitmapFactory.decodeResource(getResources(), R.drawable.stairs); 
public Bitmap[][] blueBird = doubleCrop(BitmapFactory.decodeResource(getResources(), R.drawable.bluebird), 4, 2); 
public Bitmap[] tileset = cropIt(BitmapFactory.decodeResource(getResources(), R.drawable.tileset), 10); 

public Bitmap[] cropIt(Bitmap set, int length){ 
    int width = set.getWidth()/length; 
    int height = set.getHeight(); 
    Bitmap[] array = new Bitmap[length]; 
    for(int c=0; c<length; c++){ 
     array[c] = Bitmap.createBitmap(set, c*width, 0, width, height); 
    } 
    return array; 
} 

public Bitmap[][] doubleCrop(Bitmap set, int yLength, int xLength){ 
    int width = set.getWidth()/xLength; 
    int height = set.getHeight()/yLength; 
    Bitmap[][] array = new Bitmap[yLength][xLength]; 
    for(int cy=0; cy<yLength; cy++){ 
     for(int cx=0; cx<xLength; cx++){ 
      array[cy][cx] = Bitmap.createBitmap(set, cx*width, cy*height, width, height); 
     } 
    } 
    return array; 
} 

CanvasThread：

_surfaceHolder = surfaceHolder; 
    _panel = panel; 
    scene = new Scene(_panel); 
} 

public void setRunning(boolean run) { 
    _run = run; 
} 

@Override 
public void run() { 
    Canvas c; 
    while (_run) { 
     try{Thread.sleep(FRAMEWAIT);}catch(Exception ex){} 
     c = null; 
     try { 
      c = _surfaceHolder.lockCanvas(null); 
      synchronized (_surfaceHolder) { 
       scene.circle(_panel, c); 
      } 
     } finally { 
      if (c != null) { 
       _surfaceHolder.unlockCanvasAndPost(c); 
      } 
     } 
    } 
} 

有些建议非常感谢。

非常感谢您。

Answer 1

您可以直接申报onTouchListener到Panel的构造函数：

public class Panel extends SurfaceView{ 
     Panel(final Context context, AttributeSet attrs){ 

      setOnTouchListener(new View.OnTouchListener() { 

      @Override 
      public boolean onTouch(View v, MotionEvent event) { 
       //put your logics here 
      } 
      } 
     } 
} 

而且我认为既然CanvasThread照顾只有在面板图纸 - 没有什么不同之处的面板应该知道CanvasThread。

顺便说一句：在你的例子中，你只需要设置return false到return true到Activity的onTouch方法。我认为它应该解决问题。

@Override 
public boolean onTouch (View v, MotionEvent event){ 
    //.... 
    return true; //not false 
}