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ImageTask.java
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ImageTask.java
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import android.app.ProgressDialog;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.widget.ImageView;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import java.io.IOException;
/**
* Created by JohnVenn on 2015/12/12.
*/
class ImageTask extends AsyncTask<String,Void,Bitmap> {
private ProgressDialog dialog;
private Context context;
private ImageView imageView;
ImageTask(Context context,ImageView imageView) {
this.context = context;
this.imageView = imageView;
}
@Override
protected Bitmap doInBackground(String... params) {
Bitmap bitmap = null;
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpRequest = new HttpGet(params[0]);
try {
HttpResponse httpResponse = httpClient.execute(httpRequest);
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
bitmap = BitmapFactory.decodeStream(httpResponse.getEntity().getContent());
}
} catch (IOException e) {
e.printStackTrace();
}
return bitmap;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(context);
dialog.setTitle("图片正在下载");
dialog.setMessage("正在为您玩命下载中......");
dialog.setCancelable(false);
dialog.show();
}
@Override
protected void onPostExecute(Bitmap bitmap) {
super.onPostExecute(bitmap);
imageView.setImageBitmap(bitmap);
dialog.dismiss();
}
}