Button如何在Android中使用

  mButtonBack.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View arg0) {
        Log.e("================", "MenuBackBtnListen");
        MenuimageView.setVisibility(View.INVISIBLE);
        mButtonBack.setVisibility(View.INVISIBLE);
        buttonCmdLl.setVisibility(View.INVISIBLE);
        mLabel.setVisibility(View.INVISIBLE);
      }
    });

   mButtonBack.setOnTouchListener(new View.OnTouchListener() {
      InputStream is = null;
      @Override
      public boolean onTouch(View arg0, MotionEvent event) {
        if(event.getAction() == MotionEvent.ACTION_DOWN){
          try {
            is = asm.open("ReturnBtnPress.png");
          } catch (IOException e) {
            e.printStackTrace();
          }
        }else if(event.getAction() == MotionEvent.ACTION_UP){
          try {
            is = asm.open("ReturnBtnNormal.png");
          } catch (IOException e) {
            e.printStackTrace();
          }
        }
        mButtonBack.setBackground(Drawable.createFromStream(is, null));
        return false;
      }
    });

private AssetManager asm;
asm=getAssets();