我想在使用 intentService 下载图像时显示进度条而不是进度对话框。我已经成功下载了图像，但现在我想在下载过程中显示进度条。有人请告诉我逻辑我该怎么做，给我一个例子。提前致谢。
我目前的代码是。主要活动
public class MainActivity extends Activity {
private ResponseReceiver receiver;
public ProgressBar mprogressbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
IntentFilter filter = new IntentFilter(ResponseReceiver.ACTION_RESP);
filter.addCategory(Intent.CATEGORY_DEFAULT);
receiver = new ResponseReceiver();
registerReceiver(receiver, filter);
Button download=(Button)findViewById(R.id.downloadImge);
// mprogressbar=(ProgressBar) findViewById(R.id.progressBar1);
download.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent msgIntent = new Intent(MainActivity.this,SimpleIntentService.class);
startService(msgIntent);
}
});
}
@Override
public void onDestroy() {
this.unregisterReceiver(receiver);
super.onDestroy();
}
public class ResponseReceiver extends BroadcastReceiver {
public static final String ACTION_RESP = "com.example.intent.action.MESSAGE_PROCESSED";
@Override
public void onReceive(Context context, Intent intent) {
byte[] bitmapdata=intent.getByteArrayExtra("byteArray");
Bitmap bitmap = BitmapFactory.decodeByteArray(bitmapdata , 0, bitmapdata .length);
ImageView displyImg=(ImageView) findViewById(R.id.displayImge);
// mprogressbar.setVisibility(View.GONE);
displyImg.setImageBitmap(bitmap);
//result.setText(text);
}
}
}
这是我的 IntentService.class
public class SimpleIntentService extends IntentService {
Bitmap myBitmap;
byte[] byteArray;
public SimpleIntentService() {
super("SimpleIntentService");
}
@Override
protected void onHandleIntent(Intent intent) {
String imgurl="http://daertube.files.wordpress.com/2012/06/islamic-wallpaper-15.jpg";
try {
URL url = new URL(imgurl);
HttpURLConnection connection = (HttpURLConnection) url
.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
//path=input.toString();
myBitmap = BitmapFactory.decodeStream(input);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
myBitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byteArray = stream.toByteArray();
} catch (IOException e) {
e.printStackTrace();
Log.e("error in geting url ", e.getMessage().toString());
}
Intent broadcastIntent = new Intent();
broadcastIntent.setAction(ResponseReceiver.ACTION_RESP);
broadcastIntent.addCategory(Intent.CATEGORY_DEFAULT);
broadcastIntent.putExtra("byteArray",byteArray );
sendBroadcast(broadcastIntent);
}
}