Volley请求

最新推荐文章于 2021-05-28 18:00:30 发布

原创最新推荐文章于 2021-05-28 18:00:30 发布 · 141 阅读

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CC 4.0 BY-SA版权

本文介绍了一个基于Android平台的应用程序，该程序利用Volley网络库从百度API获取天气数据，并通过ProgressDialog显示加载状态。应用程序包括输入城市名进行天气查询的功能。

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public class MainActivity extends AppCompatActivity {
    private EditText et ;
    private ProgressDialog dialog = null;
    private static final String MY_API_KEY = "362f70e78638efc3cc58370799e50883";
    private TextView weather_content;
    String httpUrl = " http://apis.baidu.com/heweather/weather/free";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        weather_content  = (TextView)findViewById(R.id.weather_content);
        et = (EditText)findViewById(R.id.edit_request);
        Button button = (Button)findViewById(R.id.button_search);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String city = et.getText().toString();
                if (city.isEmpty()){
                    return;
                }else {
                    String cityName = "city="+city;
                    dialog = ProgressDialog.show(MainActivity.this,"请等待....","获取数据中....",true);
                    netRequest(httpUrl+"?"+cityName);
                }
            }
        });

    }

    private void netRequest(String datas ) {
        RequestQueue queue = Volley.newRequestQueue(this);
        Log.d("city=：",""+datas);
        JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, datas, null, new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject jsonObject) {
                dialog.dismiss();
                weather_content.setText(jsonObject.toString());
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {

            }
        }){
            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                Map<String,String> mHeaders = new HashMap<>();
                mHeaders.put("apikey",MY_API_KEY);
                return mHeaders;

            }


        };
        queue.add(request);
    }
}