android 使用Http的POST方式读取网络数据

Post方式需要向网络传输一部分数据，同时具有输入流和输出流。
public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button btn=(Button)findViewById(R.id.btn);        btn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {               //异步加载                new AsyncTask<String,Void,Void>(){                    @Override                    protected Void doInBackground(String... strings) {                        try {                            URL url=new URL(strings[0]);                            HttpURLConnection connection=(HttpURLConnection)url.openConnection();//获取互联网连接                            connection.setDoOutput(true);                            connection.setDoInput(true);                            connection.setRequestMethod("POST");//设置请求方式                            OutputStreamWriter osw=new OutputStreamWriter(connection.getOutputStream(),"utf-8");//输出流                            BufferedWriter bw=new BufferedWriter(osw);//通过BufferedWriter可以写入字符串                            bw.write("keyfrom=testdemoHttpGet&key=660196743&type=data&doctype=xml&version=1.1&q=good");                            bw.flush();//强制输出                            InputStream is=connection.getInputStream();//获取输入流                            InputStreamReader isr=new InputStreamReader(is,"utf-8");//字节转字符，字符集是utf-8                            BufferedReader bufferedReader=new BufferedReader(isr);//通过BufferedReader可以读取一行字符串                            String line;                            while ((line=bufferedReader.readLine())!=null){                                Log.i("输出：",""+line);                            }                            bufferedReader.close();                            isr.close();                            is.close();                        } catch (MalformedURLException e) {                            e.printStackTrace();                        } catch (IOException e) {                            e.printStackTrace();                        }                        return null;                    }                    //使用api的数据接口                }.execute(" http://fanyi.youdao.com/openapi.do ");            }        });    }}
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