贴出来代码：
public class MainActivity extends Activity {
private ImageView ima;
private MemoryCache lruCache;
String path="http://android.apkbus.com/images/172034140lit.jpg";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lruCache=new MemoryCache();
ima= (ImageView) findViewById(R.id.imageView1);
// new ImageTask().execute();
Bitmap b= getBit(path);
ima.setImageBitmap(b);
}
class ImageTask extends AsyncTask<String, Void, Bitmap>{
@Override
protected Bitmap doInBackground(String... arg0) {
try {
URL url=new URL(path);
try {
HttpURLConnection conn= (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
InputStream in=conn.getInputStream();
Bitmap bit=BitmapFactory.decodeStream(in);
return bit;
} catch (IOException e) {
e.printStackTrace();
}
} catch (MalformedURLException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Bitmap result) {
ima.setImageBitmap(result);
lruCache.addBitmapToMemoryCache(path, result);
}
}
public Bitmap getBit(String path){
Bitmap bb= lruCache.getBitmapFromMemCache(path);
if(bb==null){
new ImageTask().execute();
}
return bb;
}
}
