android imageview.setBackgroundResource() 不起作用 [英] android imageview.setBackgroundResource() doesn't work

问题描述

我有一个应该在点击时更改的图像视图

public class Settings extends Activity implements OnClickListener
{
     private ImageView im1;
     @Override
     public void onCreate(Bundle savedInstanceState)
     {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.settings);
         im1 = (ImageView) findViewById( R.id.imageView1 );
         im1.setOnClickListener(this);
     }
     @Override
     public void onClick(View v)
     {
         // TODO Auto-generated method stub
         if (v == im1 )
         {
             Log.d("test", "hey!");
             v.setBackgroundResource(R.drawable.img1);
         }
     }
}

当点击该方法时会运行并打印出嘿！"但图像不会改变?

EDIT:忘记提到 imageview 包含另一个由 xml 布局文件提供的图像

EDIT: forgot to mention that imageview contains another image provided by xml layout file

推荐答案

按照惯例，你应该使用 setImageResource(R.drawable.img1); (或 setImageDrawable(getResources().getDrawable(R.drawable.img1));) 而不是 setBackgroundResource(R.drawable.img1);.

By convention, you should be using setImageResource(R.drawable.img1); (or setImageDrawable(getResources().getDrawable(R.drawable.img1));) instead of setBackgroundResource(R.drawable.img1);.

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