Android 向服务器提交数据（GET-POST-AsyncHttpClient）

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"
android:layout_width="match_parent" android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context="com.example.android31_commitdatatoserver.MainActivity">

<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="admin"
android:id="@+id/tv_main_name"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="123456"
android:id="@+id/tv_main_pass"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="登录(GET)"
android:onClick="loginByGet"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="登录(POST)"
android:onClick="loginByPost"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="登录(AcyncHttpClient)"
android:onClick="loginByAcyncHttpClient"
/>
</LinearLayout>

public class MainActivity extends AppCompatActivity {

private EditText tv_main_name;
private EditText tv_main_pass;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv_main_name = (EditText) findViewById(R.id.tv_main_name);
tv_main_pass = (EditText) findViewById(R.id.tv_main_pass);
}
public void loginByGet(View view){
String uname=tv_main_name.getText().toString();
String upwd=tv_main_pass.getText().toString();
String path=getString(R.string.login)+"getlogin.xhtml";
//可变数组
new MyTask().execute(uname, upwd, path, "GET");

Log.i("test",uname+"==get=="+upwd);
}
public void loginByPost(View view){
String uname=tv_main_name.getText().toString();
String upwd=tv_main_pass.getText().toString();
String path=getString(R.string.login)+"/getlogin.xhtml";
//可变数组
new MyTask().execute(uname, upwd, path, "POST");
Log.i("test",uname+"==post=="+upwd);
}
public void loginByAcyncHttpClient(View view){
String uname=tv_main_name.getText().toString();
String upwd=tv_main_pass.getText().toString();
String path=getString(R.string.login)+"/getlogin.xhtml";

AsyncHttpClient asyncHttpClient=new AsyncHttpClient();
RequestParams requestParams=new RequestParams();
requestParams.put("uname",uname);
requestParams.put("upwd",upwd);
//       用post提交  路径     参数         响应
asyncHttpClient.post(path,requestParams,new TextHttpResponseHandler(){
@Override   //成功
public void onSuccess(int statusCode, Header[] headers, String responseBody) {
super.onSuccess(statusCode, headers, responseBody);
//会自动把值封装好
Toast.makeText(MainActivity.this, "=="+responseBody, Toast.LENGTH_SHORT).show();
}

@Override    //失败
public void onFailure(int statusCode, Header[] headers, String responseBody, Throwable error) {
super.onFailure(statusCode, headers, responseBody, error);
}
});

}
class MyTask extends AsyncTask{

private HttpURLConnection connection;
private URL url;

@Override
protected Object doInBackground(Object[] objects) {
//获取参数的值
String uname =
98c3
objects[0].toString();
String upass = objects[1].toString();
String path = objects[2].toString();
String type = objects[3].toString();

String str="uname="+uname+"&upwd="+upwd;
try {
if ("GET".equals(type)){
//用GET方式提交
path=path+"?"+str;
url = new URL(path);
connection= (HttpURLConnection) url.openConnection();
connection.setRequestMethod(type);
}
else if ("POST".equals(type)){
//用POST方式提交
url = new URL(path);
connection =  (HttpURLConnection) url.openConnection();
connection.setRequestMethod(type);
//设置contentType   contentLength
connection.setRequestProperty("Content-Length",str.length()+"");
connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
//设置允许对外输出数据
connection.setDoOutput(true);
//将用户名和密码提交到服务器
connection.getOutputStream().write(str.getBytes());
}
connection.setConnectTimeout(5000);
if(connection.getResponseCode()==200){
InputStream is= connection.getInputStream();
BufferedReader br=new BufferedReader(new InputStreamReader(is));
String reault=br.readLine();
return reault;
}

} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}

@Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
String s= (String) o;
Toast.makeText(MainActivity.this, "==="+s, Toast.LENGTH_SHORT).show();
}
}

}