用移动手指激活视图

时间:2013-03-01 11:27:17

标签: android view

我正在尝试创建一个填充矩形的字段,如果移动手指,其下方的矩形会改变颜色。我尝试了很多方法,但我没有成功,我没有任何其他想法。现在我的代码看起来像这样,问题在于,只有当我的手指位于屏幕的左上角并且它为所有矩形着色时,着色(在ontouch中)才会激活。

public class MainActivity extends Activity implements OnTouchListener {
ImageView[][] buttons;
Button b;
TableLayout ButtonContainer; 
RelativeLayout linar;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);    
    buttons=new ImageView[5][5];
    linar=new RelativeLayout(this);
    linar.setOnTouchListener(this);

    setPos(0,0,100);
    setContentView(linar);
}

void setPos(float startX, float startY, int size)
{
    float actposX,actposY;
    actposX=startX;
    actposY=startY;
    for (int i=0;i<5;i++){

        for (int j=0;j<5;j++){
            buttons[i][j]=new ImageView(this);
            buttons[i][j].setLayoutParams(new RelativeLayout.LayoutParams(size, size));
            buttons[i][j].setX(actposX);
            buttons[i][j].setY(actposY);
            if (j % 2 ==0){
                buttons[i][j].setBackgroundColor(Color.YELLOW);
            }
            else
            {   buttons[i][j].setBackgroundColor(Color.BLUE);   }
            actposX+=size;
            linar.addView(buttons[i][j]);
        }
        actposY+=size;
        actposX=startX;
    }

}

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

    for(int i =0; i< 5; i++)
        {
           for (int j=0; j< 5; j++)
           {
               Rect outRect = new Rect(buttons[i][j].getLeft(), buttons[i][j].getTop(), buttons[i][j].getRight(), buttons[i][j].getBottom());
               if(outRect.contains((int)event.getX(), (int)event.getY()))
                {
                    buttons[i][j].setBackgroundColor(Color.RED);
                }
           }
        }

    return true;
}

}

2 个答案:

答案 0 :(得分:0)

你可以这样做,

     @Override
                public boolean onTouchEvent(MotionEvent event) {
                    // TODO Auto-generated method stub
                    final int action = event.getAction();

                    switch (action & MotionEventCompat.ACTION_MASK) {
                    case MotionEvent.ACTION_DOWN:
                        event.getX();
event.getY();

                        Log.d(TAG, "onTouchEvent DOWN: x " + selX + ", y " + selY);
                        break;

                    case MotionEvent.ACTION_MOVE:
                        event.getX();
                                event.getY();
                        Log.d(TAG, "onTouchEvent Move: x " + selX + ", y " + selY);
                        break;

                    case MotionEvent.ACTION_UP:
                        event.getX();
                                event.getY();
                        Log.d(TAG, "onTouchEvent UP: x " + selX + ", y " + selY);

                        break;
                    }

                    return true;
                }

MotionEvent.ACTION_MOVE 将检测指针移动。你可以得到指针并做你的颜色填充部分。还要检查logcat以便更好地理解..祝你好运!

答案 1 :(得分:0)

我想通了...... getLeft(),getTop()..给出了0值,所以我改变了它:

                   outRect.top=(int) (buttons[i][j].getY());
               outRect.bottom=(int) (buttons[i][j].getY()+buttons[i][j].getLayoutParams().height);
               outRect.left=(int) (buttons[i][j].getX());
               outRect.right=(int) (buttons[i][j].getX()+buttons[i][j].getLayoutParams().height);