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最新推荐文章于 2025-05-14 17:47:45 发布

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本文介绍了一个简单的Android应用示例，该应用使用OkHttp 3.8.0从远程服务器获取天气数据，并将结果显示在一个ListView中。示例代码展示了如何创建OkHttp客户端，构建请求并异步获取响应。

//添加一个okhttp3.8.0jar包

MainActivity:

public class MainActivity extends AppCompatActivity {


    private ListView listView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView = (ListView) findViewById(R.id.listView);
        getDataforServer();
    }



    private void getDataforServer() {
        OkHttpClient okHttpClient = new OkHttpClient();
        Request request = new Request.Builder().url("http://v.juhe.cn/weather/index?format=2&cityname=北京&key=e7a94c85b65930fdb88bc0698416287c").build();
        Call call = okHttpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                if (response.code() == 200) {
                    String str = response.body().string();
                    Log.d("haha",""+str);
                    Gson gson = new Gson();
                    Bean bean = gson.fromJson(str, Bean.class);
                    final List<Bean.ResultBean.FutureBean> future = bean.getResult().getFuture();


                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {

                            listView.setAdapter(new ArrayAdapter<Bean.ResultBean.FutureBean>(MainActivity.this,android.R.layout.simple_list_item_1,future));

                        }
                    });

                } else {
                    Log.d("myMessage", "" + response.message());
                }
            }
        });

    }
}

Myadapter:

public class Myadapter extends BaseAdapter {
    private Context context;
    private TextView textView;

    public Myadapter(Context context){
        this.context=context;
    }
    private List<Bean.ResultBean.FutureBean> list=new ArrayList<>();

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        convertView=View.inflate(context,android.R.layout.simple_list_item_1,null);
        textView = (TextView) convertView.findViewById(android.R.id.text1);
        textView.setText(list.get(position).getDate());
        return convertView;
    }
}