Android 通过HTTP POST请求互联网数据

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.btn).setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
new AsyncTask<String, Void, String>() {

@Override
protected String doInBackground(String... params) {
try {
URL url=new URL(params[0]);
HttpURLConnection connection=(HttpURLConnection)url.openConnection();

connection.setDoOutput(true);
connection.setRequestMethod("POST");

OutputStreamWriter osw=new OutputStreamWriter(connection.getOutputStream(),"UTF-8");
BufferedWriter bw=new BufferedWriter(osw);
bw.write("keyfrom=aiHttpGet&key=1989341286&type=data&doctype=json&version=1.1&q=post");
bw.flush();

InputStream iStream=connection.getInputStream();
InputStreamReader isr=new InputStreamReader(iStream,"UTF-8");
BufferedReader br=new BufferedReader(isr);
String line;
while ((line=br.readLine())!=null) {
Log.i("get", line);
}
br.close();
isr.close();
iStream.close();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}.execute("http://fanyi.youdao.com/openapi.do");
}
});
}