Question

是的，我所拥有的是“Game”，“GridView”和“TokenView”这三个类（虽然我只需要帮助的第一个也是最后一个类：D）我想在这里做的是使用onTouch方法获取在我的'TokenView'类中触摸的列（getY）。

游戏：

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

    int[][] pos = new int[mColumn][mRow];

    /*Setting ball movement frame*/
    FrameLayout tokenFrame = (FrameLayout) findViewById(R.id.widget39);
    TokenView token = new TokenView(this);
    tokenFrame.addView(token);


    /*Setting drop area*/
    FrameLayout gridFrame = (FrameLayout) findViewById(R.id.widget41);
    GridView gridArea = new GridView(this);
    gridFrame.addView(gridArea);
}
public int getPlayer(){
    return player;
}

public boolean onTouch(View v, MotionEvent event){

    if(){
        //where I need help :D
    }

    return false;
}

TokenView：

public class TokenView extends View {

int Columns = 7;
public TokenView(Context context) {
    super(context);
    // TODO Auto-generated constructor stub
}

protected void onDraw(Canvas canvas)
{
    super.onDraw(canvas);

    Paint col = new Paint();
    col.setColor(Color.rgb(0,103,231));
    col.setStyle(Paint.Style.FILL);

    Paint red = new Paint();
    red.setAntiAlias(true); // smoothens edge
    red.setColor(Color.RED);
    red.setStyle(Paint.Style.FILL);

    Paint yellow = new Paint();
    yellow.setAntiAlias(true); // smoothens edge
    yellow.setColor(Color.YELLOW);
    yellow.setStyle(Paint.Style.FILL);
    Rect myRect = new Rect();

    canvas.drawRect(0, 0, getWidth(), getHeight(), col);
    int columnWidth = canvas.getWidth() / 7;
    int rowHeight = (canvas.getHeight() / 17);
    int circleRadius = (canvas.getHeight() / 6) - 163;

    Game game = new Game();
    int player = game.getPlayer();


    for(int column = 0; column < Columns; column++)
    {
        if(player == 1){
            canvas.drawCircle((columnWidth*column)+55, (rowHeight)+10, circleRadius, red);
        }
        else if(player == 2){
            canvas.drawCircle((columnWidth*column)+55, (rowHeight)+10, circleRadius, yellow);
        }
        else if(player == 0){
            canvas.drawCircle((columnWidth*column)+55, (rowHeight*1)+10, circleRadius, col);
        }
    }
}

非常感谢提前

Answer 1

您应该改写TokenView类中的onTouch方法画布就是绘制视图内容的地方您应该在TokenView类中编写类似的内容：

private Cell bufferCell;

@Override
public boolean onTouchEvent(MotionEvent event)
{
  Cell cell = getCell(event);
  if (cell != null)
  {
    switch (event.getAction())
    {
      case MotionEvent.ACTION_DOWN:
        if (cell != bufferCell)
          bufferCell = cell;

        // DO STUFF HERE.
        // THE PLAYER HAS JUST TOUCHED A CELL.
        // invalidate();
        break;
      case MotionEvent.ACTION_MOVE:
        if (cell != bufferCell)
        {
          bufferCell = cell;
          // Continue Pan
          // DO STUFF HERE
          // THE PLAYER'S FINGER IS ON A DIFFERENT CELL NOW, AND MOVING
          // invalidate();
        }
        break;
      case MotionEvent.ACTION_UP:
        // Commit Pan
        bufferCell = null;
        // DO STUFF HERE
        // THE PLAYER HAS TAKEN HIS FINGER OFF THE VIEW
        // invalidate();
        break;
    }
  }
  return true;
}

private Cell getCell(MotionEvent event)
{
  int motionX = (int) event.getX();
  int motionY = (int) event.getY();
  if (motionX > 0 && motionX < sizeOfGrid && motionY > 0
      && motionY < sizeOfGrid)
  {
    int rowIndex = motionY / currentSizeOfCell % rowCount;
    int columnIndex = motionX / currentSizeOfCell % columnCount;
    return cellArray[rowIndex][columnIndex];
  }
  return null;
}

调用invalidate()以重绘视图在TokenView的Game game = new Game();方法中不要 onDraw()。
它会在您绘制内容时继续创建新游戏，并且您不会得到任何预期的行为。

我使用了bufferCell变量，这将有助于减少基于逻辑的方法被调用的时间，因为当玩家将手指移动到网格上时，单元格无需更改。只有当它改变时，如果你按照上面提到的代码设计，将触发对适当方法的调用。

另请阅读有关如何在Android中创建自定义视图的信息要覆盖的主要方法是onDraw()，onSizeChanged()和onMeasure()。

希望有所帮助。

Android canvas onTouch

1 个答案: