扫二维码与项目经理沟通
我们在微信上24小时期待你的声音
解答本文疑问/技术咨询/运营咨询/技术建议/互联网交流
public class MainActivity extends Activity { private String url = "/upload/otherpic44/200000.jpg"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); testTask(); } public void testTask(){ DownloadPicTask task = new DownloadPicTask(); task.imgPath = url; task.img = (ImageView) findViewById(R.id.p_w_picpathView1); task.execute(url); } }
//任务类
10年积累的网站制作、成都网站设计经验,可以快速应对客户对网站的新想法和需求。提供各种问题对应的解决方案。让选择我们的客户得到更好、更有力的网络服务。我虽然不认识你,你也不认识我。但先网站设计后付款的网站建设流程,更有鹿泉免费网站建设让你可以放心的选择与我们合作。
package com.example.task; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.util.EntityUtils; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.AsyncTask; import android.util.Log; import android.widget.ImageView; public class DownloadPicTask extends AsyncTask{ public String imgPath; private byte[] data; public ImageView img; protected void onPrepareExecute(){ Log.v("task", "onPrepareExecute"); super.onPreExecute(); } // doInBackground方法内部执行后台任务,不可在此方法内修改UI @Override protected String doInBackground(String... arg0) { // TODO Auto-generated method stub Log.v("task", "doInBackground " + arg0); HttpClient httpClient = new DefaultHttpClient(); HttpGet httpGet = new HttpGet(imgPath); HttpResponse httpResponse = null; try { httpResponse = httpClient.execute(httpGet); if (httpResponse.getStatusLine().getStatusCode() == 200) { data = EntityUtils.toByteArray(httpResponse .getEntity()); } } catch (Exception e) { e.printStackTrace(); } return null; } // onProgressUpdate方法用于更新进度信息 @Override protected void onProgressUpdate(Integer... progresses) { Log.v("task", "onProgressUpdate"); super.onProgressUpdate(progresses); } // onPostExecute方法用于在执行完后台任务后更新UI,显示结果 @Override protected void onPostExecute(String result) { // progressDialog.dismiss(); Log.v("task", "onPostExecute"); Bitmap bmp=BitmapFactory.decodeByteArray(data, 0, data.length); img.setImageBitmap(bmp); } // onCancelled方法用于在取消执行中的任务时更改UI @Override protected void onCancelled() { Log.v("task", "onCancelled"); } }
//。xml中只有一个ImageView控件
我们在微信上24小时期待你的声音
解答本文疑问/技术咨询/运营咨询/技术建议/互联网交流