一个切换button背景的方法：getBackground()，setBackgroundDrawable

来源：互联网发布：海洋cms模板怎么用编辑：程序博客网时间：2024/06/03 16:33

场景：假设页面中有多个button，点击其中一个button1，button1背景改变并保持，其他button则会默认状态。

方法：通过getBackground()获取控件的默认drawable，通过setBackgroundDrawable设置给其他控件。

代码实例：

     //
    setRed = new Button(mContext);
    setRed.setText(R.string.set_red);
    setRed.setX(xBtn);
    setRed.setY(yBtn);
    setRed.setBackgroundColor(Color.RED);
    setRed.setOnClickListener(new View.OnClickListener() {

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    graffitiView.setPaintColor(Color.RED);


    setGreen.setBackgroundDrawable(drawable);
    setBlue.setBackgroundDrawable(drawable);
    setRed.setBackgroundColor(Color.RED);

    setRed.setFocusable(false);
    setGreen.setFocusable(false);
    setBlue.setFocusable(false);

   }
  });
    this.addView(setRed, mLayoutParamsBtn);

    //
    setGreen = new Button(mContext);
    setGreen.setText(R.string.set_green);
    setGreen.setX(wBtn + xBtn*2);
    setGreen.setY(yBtn);
    drawable = setGreen.getBackground();
    setGreen.setOnClickListener(new View.OnClickListener() {

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    graffitiView.setPaintColor(Color.GREEN);

    setRed.setFocusable(false);
    setGreen.setFocusable(false);
    setBlue.setFocusable(false);

    setRed.setBackgroundDrawable(drawable);
    setBlue.setBackgroundDrawable(drawable);
    setGreen.setBackgroundColor(Color.GREEN);
   }
  });
    this.addView(setGreen, mLayoutParamsBtn);

    //
    setBlue = new Button(mContext);
    setBlue.setText(R.string.set_blue);
    setBlue.setX(wBtn*2 + xBtn*3);
    setBlue.setY(yBtn);
    setBlue.setOnClickListener(new View.OnClickListener() {

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    graffitiView.setPaintColor(Color.BLUE);

    setRed.setFocusable(false);
    setGreen.setFocusable(false);
    setBlue.setFocusable(false);

    setRed.setBackgroundDrawable(drawable);
    setGreen.setBackgroundDrawable(drawable);
    setBlue.setBackgroundColor(Color.BLUE);

   }
  });
    this.addView(setBlue, mLayoutParamsBtn);

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