的Android onMeasure（）測量的寬度，但高度不

Question

我有一個SurfaceView，我需要知道的寬度和高度，代碼如下：

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
    super.onMeasure(widthMeasureSpec, heightMeasureSpec); 
    screenWidth = MeasureSpec.getSize(widthMeasureSpec); 
    screenHeight = MeasureSpec.getSize(heightMeasureSpec); 
} 

對於它管理來衡量的寬度某種原因這個視圖，但不是它的高度，我試着把高度測量放在寬度之前，看看它是不是快速調用onMeasure（）方法，但它沒有工作。

編輯：

繼承人全部代碼：

public class GameView extends SurfaceView { 
GameLoopThread gameLoopThread; 
Integer screenWidth, screenHeight; 
static Integer score; 
long lastTime = 0; 
byte speed = 5; 

static Boolean mute; 
static String textureUsed = "space"; 

public GameView(Context context) { 
    super(context); 
    mute = MainMenu.getMute(); 
    score = 0; 
    gameLoopThread = new GameLoopThread(this); 
    SurfaceHolder holder = getHolder(); 
    holder.addCallback(new Callback() { 

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

     public void surfaceCreated(SurfaceHolder holder) { 
      gameLoopThread.setRunning(true); 
      gameLoopThread.start(); 
     } 

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

// graphics are drawn here 
@Override 
protected void onDraw(Canvas canvas) { 
    //covers the whole canvas in white to clear previouslly draw graphics 
    canvas.drawColor(Color.WHITE); 
    //set the location of the players selected texture pack 
    int resID = getResources().getIdentifier(textureUsed, "drawable", "com.unreturnablestudios.FlipSide"); 
    //loads this texture pack 
    Bitmap graphics = BitmapFactory.decodeResource(getResources(), resID); 

    //src and dst are used to detarmine which parts of the image are 
    //going to be used and where abouts on the screen they are going 
    //to be displayed 
    Rect src = new Rect(0, 0, 640, 480); 
    Rect dst = new Rect(0, 0, screenWidth, screenHeight); 
    canvas.drawBitmap(graphics, src, dst, null); 

    // sets the style of the text up 
    String scoreString = Integer.toString(score); 
    Paint paint = new Paint(); 
    paint.setColor(Color.RED);//red font 
    paint.setTypeface(Typeface.DEFAULT);//Uses the players default font 
    paint.setTextSize(screenWidth/10);//font size 
    //draws the text 
    canvas.drawText(scoreString,0, 0, paint); 
    score -= speed; 
} 

// deals with user touching the screen 
@Override 
public boolean onTouchEvent(MotionEvent event) { 
    double X = event.getX(); 

    long currentTime = System.currentTimeMillis(); 

    if (currentTime > lastTime + 100) { 
     if (X < (screenWidth/2) && X != 0) { 

     } else { 

     } 
    } 
    lastTime = System.currentTimeMillis(); 
    return super.onTouchEvent(event); 
} 

public void launchEnd() { 
    Context context = getContext(); 
    Intent openEnd = new Intent("com.unreturnablestudios.FlipSide.END"); 
    context.startActivity(openEnd); 
    gameLoopThread.setRunning(false); 
} 

public static Integer getScore() { 
    // called by the End class and returns the score. 
    return score; 
} 

public static boolean getMute() { 
    // called by the End class and returns the boolean that is in control of 
    // sound 
    return mute; 
} 

// gets the measurements of the screen (width and height) 
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
    super.onMeasure(widthMeasureSpec, heightMeasureSpec); 
    screenWidth = MeasureSpec.getSize(widthMeasureSpec); 
    screenHeight = MeasureSpec.getSize(heightMeasureSpec); 
} 
} 

奇怪的是我在以前版本的應用程序的使用onMeasure（）之前，它的工作很好，但我決定改變大多數代碼嘗試使它運行得更快，現在它不能工作。

Answer 1

OnMeasure通常會在佈局過程中被多次調用，您是否檢查過它不會被多次調用？

通常我所看到的是，對於某些佈局來說，它被稱爲第一次測量視圖的寬度，然後一旦所有視圖寬度都被鎖定，則稱其爲第二次測量高度。