本文将带你了解Android应用开发之Android 请求网络接口实现方法，希望本文对大家学Android有所帮助。

public   class Fragment01 extends Fragment {

private static final String TAG =   "Fragment01----";

private MyHandler myHandler = new MyHandler();

//判断网络状态

private final static int SUCCESS = 0;

private final static int ERROR = 1;

private ListView listView;

@Nullable

@Override

public View onCreateView(@NonNull LayoutInflater   inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState)   {

View view =   inflater.inflate(R.layout.fragment01_layout, container, false);

listView =   view.findViewById(R.id.fragment01_listview);

return view;

}

@Override

public void onActivityCreated(@Nullable Bundle   savedInstanceState) {

super.onActivityCreated(savedInstanceState);

//4.获取网络数据

new Thread() {

@Override

public void run() {

try {

URL u = new URL(HttpConfig.ONE_URL);

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

connection.setConnectTimeout(5000);

if (connection.getResponseCode() == 200) {

InputStream inputStream =   connection.getInputStream();

//5.封装工具类

String json =   CommenUtils.inputStream2String(inputStream);

//6.使用Handler,发送数据

Message message = myHandler.obtainMessage();

message.what = SUCCESS;

message.obj = json;

myHandler.sendMessage(message);

}

} catch (Exception e) {

e.printStackTrace();

}

}

}.start();

}

class MyHandler extends Handler {

@Override

public void handleMessage(Message msg) {

switch (msg.what) {

case SUCCESS:

//成功

String json = (String) msg.obj;

Log.d(TAG, "handleMessage: " + json);

//导包Gson

Gson gson = new Gson();

//如果json就是一个纯数组的解析方式

Type listType = new TypeToken>(){}.getType();

LinkedList list = gson.fromJson(json,   listType);//7.根据接口，生成javabean

//8.书写Adapter进行显示

List item = list.get(0).getItem();

MyAdapter myAdapter = new   MyAdapter(getActivity(), item);

listView.setAdapter(myAdapter);

break;

}

}

}

}

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