更改图像上的图像按钮单击android

我正在为页面布局控件显示动态图像以显示页数，现在我将默认焦点放在第一个图像按钮上，现在当我单击下一个图像按钮时，我想用简单的图像按钮替换第一个，用可聚焦图像按钮替换单击的一个，我也使用了无效方法，但尚未解决，请帮助

if(i==0){
    Drawable dr = getResources().getDrawable(R.drawable.bullet_2);
    Bitmap bitmap = ((BitmapDrawable) dr).getBitmap();
    Drawable d = new BitmapDrawable(Bitmap.createScaledBitmap(bitmap, 10, 10, true));
    b1.setImageDrawable(d);
    flag = false;
}
else {
    Drawable dr = getResources().getDrawable(R.drawable.bullet_1);
    Bitmap bitmap = ((BitmapDrawable) dr).getBitmap();
    // Scale it to 50 x 50
    Drawable d = new BitmapDrawable(Bitmap.createScaledBitmap(bitmap, 10, 10, true));
    // Set your new, scaled drawable "d"
    b1.setImageDrawable(d);
}
b1.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        //Object id = b1.getTag();
        Object tag = b1.getTag();
        System.out.println("value of id:::" +tag.toString());
        Global.tagvalue = tag.toString();

        flag = true;

        if(flag == true){
            Drawable dr = getResources().getDrawable(R.drawable.bullet_2);
            Bitmap bitmap = ((BitmapDrawable) dr).getBitmap();
            // Scale it to 50 x 50
            Drawable d = new BitmapDrawable(Bitmap.createScaledBitmap(bitmap, 10, 10, true));
            // Set your new, scaled drawable "d"
            b1.setImageDrawable(d);
            b1.invalidate();
            WindowManager w = getWindowManager(); 
            Display dis = w.getDefaultDisplay(); 
            int width = dis.getWidth(); 
            int height = dis.getHeight(); 
            System.out.println("value of width of screen::" +width);

            horlist.mNextX = width*Integer.parseInt(tag.toString());
        }
        else {
            Drawable dr = getResources().getDrawable(R.drawable.bullet_1);
            Bitmap bitmap = ((BitmapDrawable) dr).getBitmap();
            // Scale it to 50 x 50
            Drawable d = new BitmapDrawable(Bitmap.createScaledBitmap(bitmap, 10, 10, true));
            // Set your new, scaled drawable "d"
            b1.setImageDrawable(d);
            b1.invalidate();
        }

您可以将图像设置为空

imgBtn.setImageBitmapnull

---

b1.setImageDrawable0

尝试b1.setImageDrawablenull；或b1.setImageDrawable0；null将删除图像，我不想删除图像我只想在图像上更改图像的焦点单击我在您的Que中找到了这个。。。。。我想用简单的imagebutton替换第一个