Android中异步任务请求网络数据

来源：互联网发布：苹果6s怎么开4g网络编辑：程序博客网时间：2024/05/16 06:53
public class MainActivity extends AppCompatActivity {    private TextView text_title;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //获取控件        text_title = (TextView) findViewById(R.id.text_title);        Mytask mytask = new Mytask();        mytask.execute();    }    class Mytask extends AsyncTask<Void,Void,String>{        @Override        protected String doInBackground(Void... voids) {            try {                //创建httpclient对象                DefaultHttpClient client = new DefaultHttpClient();                //路径                String path = "http://apis.juhe.cn/cook/query?key=?&menu=%E8%A5%BF%E7%BA%A2%E6%9F%BF&rn=10&pn=3";                //创建请求方式                HttpGet httpGet = new HttpGet(path);                //用对象执行                HttpResponse execute = client.execute(httpGet);                //获取状态码,要先获取状态行                int statusCode = execute.getStatusLine().getStatusCode();                if (statusCode == 200) {                    //获取实体内容                    InputStream content = execute.getEntity().getContent();                    //把实体内容转为字符串                    InputStreamReader inputStreamReader = new InputStreamReader(content);                    BufferedReader bufferedReader = new BufferedReader(inputStreamReader);                    //创建字符串缓冲区                    StringBuilder builder = new StringBuilder();                    //创建变量,用来存储读取的内容                    String string = null;                    //循环读取内容                    while ((string = bufferedReader.readLine()) != null) {                        builder.append(string);                    }                    bufferedReader.close();                    return builder.toString();                }            } catch (Exception e) {                e.printStackTrace();            }            return null;        }        //此方法接收doinbackground方法的返回值        @Override        protected void onPostExecute(String s) {            text_title.setText(s);        }    }}
阅读全文
0 0