Question

我有一个游戏类

我这样做的地方

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d(TAG, "onCreate");
    int diff = getIntent().getIntExtra(KEY_DIFFICULTY, DIFFICULTY_EASY);
    puzzle = getPuzzle(diff);
    calculateUsedTiles();
    puzzleView = new PuzzleView(this);
    Log.d(TAG,"new Puxxle");
    setContentView(puzzleView);
    Log.d(TAG,"setContent");
    puzzleView.requestFocus();
}

我有我的PuzzleView类

public PuzzleView(Context context) {
    super(context);
    Log.d(TAG, "puzzleview");
    this.game = (Game) context;
    setFocusable(true);
    setFocusableInTouchMode(true);
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    // TODO Auto-generated method stub
    super.onSizeChanged(w, h, oldw, oldh);
    Log.d(TAG, "w and h" + w + " " + h);
    width = w / 9f;
    height = h / 9f;
    Log.d(TAG, "selY and x" + selX + " " + selY);
    getRect(selX, selY, selRect);
    Log.d(TAG, "selY and x" + selX + " " + selY);
    Log.d(TAG, "onSizeChanged: width " + width + ", height " + height);
    super.onSizeChanged(w, h, oldw, oldh);
}

private void getRect(int x, int y, Rect rect) {
    rect.set((int) (x * width), (int) (y * height),
            (int) (x * width + width), (int) (y * height + height));
}

@Override
protected void onDraw(Canvas canvas) {
    Log.d(TAG,"drawing");
    Paint background = new Paint();
    background.setColor(getResources().getColor(R.color.puzzle_background));
    canvas.drawRect(0, 0, getWidth(), getHeight(), background);
}

现在我的理解是，在Game类中，我们执行setContentView时会调用所有onsizeChanged和onDraw，但是在调用setContent之后会发生这种情况。

这是我的日志序列

  D/Game    ( 4175): onCreate 
  D/PuzzleView( 4175): puzzleview
  D/Game    ( 4175): new Puxxle
  D/Game    ( 4175): setContent
  D/PuzzleView( 4175): w and h320 430
  D/PuzzleView( 4175): selY and x0 0
  D/PuzzleView( 4175): selY and x0 0
  D/PuzzleView( 4175): onSizeChanged: width 35.555557, height 47.77778
  D/PuzzleView( 4175): drawing

Answer 1

当一个Activity获得焦点时，将要求它绘制其布局。 Android框架将处理绘制过程，但Activity必须提供根节点其布局层次结构。

setContentView()只设置根节点，但视图的绘制发生在onCreate()之后的其他位置。

在android中创建新视图时的调用顺序是什么

1 个答案: