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

1.布局
<?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:orientation="vertical">

<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入用户名"
android:id="@+id/et_main_uanem"/>

<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入密码"
android:id="@+id/et_main_upwd"/>

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="loginGET"
android:text="登录(GET)"/>

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="loginPOST"
android:text="登录(POST)"/>
</LinearLayout>

<?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_post"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入用户名"
android:id="@+id/et_Async_uanem"/>

<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入密码"
android:id="@+id/et_Async_upwd"/>

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="loginAsyncHttpClient"
android:text="登录(AsyncHttpClient)"/>

</LinearLayout>

2.java代码
使用Android原生态提交数据（POST,GET）

public class MainActivity extends AppCompatActivity {

private EditText et_main_uanem;
private EditText et_main_upwd;
private HttpURLConnection connection;
private URL url;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et_main_uanem = (EditText) findViewById(R.id.et_main_uanem);
et_main_upwd = (EditText) findViewById(R.id.et_main_upwd);
}

public void loginGET(View view) {
String uname = et_main_uanem.getText().toString();
String upwd = et_main_upwd.getText().toString();
String path = "http://192.168.43.149:8080/Mysqldenglu.xhtml";
new MyTask().execute(uname, upwd, path, "GET");
}
public void loginPOST(View view) {
String uname = et_main_uanem.getText().toString();
String upwd = et_main_upwd.getText().toString();
String path = "http://192.168.43.149:8080/Mysqldenglu.xhtml";
new MyTask().execute(uname, upwd, path, "POST");
}

class MyTask extends AsyncTask {
@Override
protected Object doInBackground(Object[] params) {
//获取参数的值
String uname = params[0].toString();
String upwd = params[1].toString();
String path = params[2].toString();
String type = params[3].toString();
String str="sname=" + uname + "&spwd=" + upwd;
//判断提交方式是GET还是POST
try {
if ("GET".equals(type)) {
path = path + "?"+str;
Log.i("哈哈", path);
url = new URL(path);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod(type);
} else if ("POST".equals(type)) {
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));
Str
4000
ing result = br.readLine();
return result;
}
} catch (Exception 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_LONG).show();
}

}
}

使用第三方框架提交数据（AsyncHttpClient）
public class MainActivity extends AppCompatActivity {

private EditText et_main_uanem;
private EditText et_main_upwd;
private HttpURLConnection connection;
private URL url;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et_main_uanem = (EditText) findViewById(R.id.et_main_uanem);
et_main_upwd = (EditText) findViewById(R.id.et_main_upwd);
}

public void loginGET(View view) {
String uname = et_main_uanem.getText().toString();
String upwd = et_main_upwd.getText().toString();
String path = "http://192.168.43.149:8080/Mysqldenglu.xhtml";
new MyTask().execute(uname, upwd, path, "GET");
}
public void loginPOST(View view) {
String uname = et_main_uanem.getText().toString();
String upwd = et_main_upwd.getText().toString();
String path = "http://192.168.43.149:8080/Mysqldenglu.xhtml";
new MyTask().execute(uname, upwd, path, "POST");
}

class MyTask extends AsyncTask {
@Override
protected Object doInBackground(Object[] params) {
//获取参数的值
String uname = params[0].toString();
String upwd = params[1].toString();
String path = params[2].toString();
String type = params[3].toString();
String str="sname=" + uname + "&spwd=" + upwd;
//判断提交方式是GET还是POST
try {
if ("GET".equals(type)) {
path = path + "?"+str;
Log.i("哈哈", path);
url = new URL(path);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod(type);
} else if ("POST".equals(type)) {
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 result = br.readLine();
return result;
}
} catch (Exception 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_LONG).show();
}

}
}

3.清单文件添加权限
<!--添加联网的权限-->
<uses-permission android:name="android.permission.INTERNET" />