AsyncTask GET请求

布局


实现代码

/** * 使用异步任务下载网络数据

* 使用gson解析

* 注:有时间看看我讲的原生json解析

*/

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

  public static final String KAI_YAN_URL = "http://baobab.kaiyanapp.com/api/v4/tabs/selected?udid=11111&vc=168&vn=3.3.1&deviceModel=Huawei%36&first_channel=eyepetizer_baidu_market&last_channel=eyepetizer_baidu_market&system_version_code=20"; protected Button mGetNetworkDataBtn;

  protected Button mGetPicBtn;

  protected ImageView mImageView;

   @Override protected void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       super.setContentView(R.layout.activity_main);

       initView();

  }

  @Override public void onClick(View view) {

      if (view.getId() == R.id.get_network_data_btn) {

           getDatas();

       } else if (view.getId() == R.id.get_pic_btn) {

           getPicture();

      }

  }

 private void getDatas() {

       MyTask task = new MyTask();

       task.execute(KAI_YAN_URL);

   }

  private void getPicture() {

      String imgUrl = "http://img.kaiyanapp.com/1699f3946ccd281230a1d887d169439f.pngimageMogr2/quality/60/format/jpg";

       Picasso .with(this) .load(imgUrl) .into(mImageView);

  }

  private void initView() {

       mGetNetworkDataBtn = (Button) findViewById(R.id.get_network_data_btn);   

       mGetNetworkDataBtn.setOnClickListener(MainActivity.this);

       mGetPicBtn = (Button) findViewById(R.id.get_pic_btn);

       mGetPicBtn.setOnClickListener(MainActivity.this);

       mImageView = (ImageView) findViewById(R.id.image_view);

   }

   private class MyTask extends AsyncTask> {

      @Override protected ListdoInBackground(String... params) {

           String requestUrl = params[0];

           // 使用HTTPUrlConnection

           try {

              URL url = new URL(requestUrl);

              HttpURLConnection connection = (HttpURLConnection) url.openConnection();

              // 配置connection

              connection.setRequestMethod("GET");  // GET或POST必须大写

              // 连接网络 connection.connect();

              // 判断是否连接成功 if (connection.getResponseCode() == 200) {

              // 获取来自网络的输入流

              // 使用缓冲字符输入流

              // 字节流转字符流

              BufferedReader br = null;

              br = new BufferedReader(new InputStreamReader(connection.getInputStream()));

              // 最终接收的json字符串

             String json = "";

             // 使用缓冲流读取到的每一行数据

             String line = "";

             while ((line = br.readLine()) != null) {

                  json += line.trim();

              }

             // json数据产生完毕,该解析了

             Gson gson = new Gson();

             KaiYan kaiYan = gson.fromJson(json, KaiYan.class);

             ListitemList = kaiYan.getItemList();

             return itemList;

          }

    } catch (Exception e) {

           e.printStackTrace();

          Toast.makeText(MainActivity.this, "下载错误", Toast.LENGTH_SHORT).show();

       }

           return null;

       }

       @Override protected void onPostExecute(ListitemList) {

            super.onPostExecute(itemList);

             // 可以使用RecyclerView或ListView展示数据

            for (KaiYan.ItemBean itemBean : itemList) {

            Log.d("1507", "type: " + itemBean.getType() +

            ", title: " + itemBean.getData().getTitle() +

            ", url" + itemBean.getData().getPlayUrl());

            }

      }

  }

}

Bean

package net.bwie.network.bean;

import java.util.List;public class KaiYan {

   private ListitemList; public ListgetItemList() {

      return itemList;

   }

  public void setItemList(ListitemList) {

this.itemList = itemList;

}

public static class ItemBean {

private String type = "";

private DataBean data;

public String getType() {

return type;

}

public void setType(String type) {

this.type = type;

}

public DataBean getData() {

return data;

}

public void setData(DataBean data) {

this.data = data;

}

public static class DataBean {

private String playUrl = "";

private String title = "";

public String getPlayUrl() {

return playUrl;

}

public void setPlayUrl(String playUrl) {

this.playUrl = playUrl;

}

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

}

}

}

最重要的是记得加上网络权限


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