前提是要导入Asynchttpclient lib包

public class MainActivity extends Activity {

    private EditText et_username;
    private EditText et_password;
     String path;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // [1]找到我们关心的控件
        
        et_username = (EditText) findViewById(R.id.et_username);
        et_password = (EditText) findViewById(R.id.et_password);

    }

    // 点击按钮 进行get方式提交数据
    public void click1(View v) {
        
        String name = et_username.getText().toString().trim();
        String pwd = et_password.getText().toString().trim();
        //[2.1]定义get方式要提交的路径    小细节 如果提交中文要对name 和 pwd 进行一个urlencode 编码 
       
        try {
            path = "http://192.168.11.73:8080/login/LoginServlet?username="+URLEncoder.encode(name, "utf-8")+"&password="+URLEncoder.encode(pwd, "utf-8")+"";
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
            
        //[3]使用开源项目进行get请求 
        //[3.1]创建asynchttpclient 
        AsyncHttpClient client  = new AsyncHttpClient();
        //[3.2]进行get 请求 
        client.get(path, new AsyncHttpResponseHandler() {
            //请求成功的回调方法
            @Override
            public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
                
                try {
                    Toast.makeText(getApplicationContext(), new String(responseBody,"gbk"), 1).show();
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
                
            }
            
            //请求失败
            @Override
            public void onFailure(int statusCode, Header[] headers,
                    byte[] responseBody, Throwable error) {
                
            }
        });
        
        
        
        
        
        
        
    }

    // [1]点击按钮 进行post方式提交数据
    public void click2(View v) {
        //[2]获取用户名和密码 
        String name = et_username.getText().toString().trim();
        String pwd = et_password.getText().toString().trim();
        String path = "http://192.168.11.73:8080/login/LoginServlet";
        //[3.1]创建asynchttpclient 
        AsyncHttpClient client  = new AsyncHttpClient();
        
        //[3.1.0]准备请求体的内容
        RequestParams params = new RequestParams();
        params.put("username", name);
        params.put("password", pwd);
        //[3.2]进行post请求 params 请求的参数封装 
        client.post(path, params, new AsyncHttpResponseHandler() {
            //请求成功     登录成功
            @Override
            public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {

                try {
                    Toast.makeText(getApplicationContext(), new String(responseBody,"gbk"), 1).show();
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
            }
            
            @Override
            public void onFailure(int statusCode, Header[] headers,
                    byte[] responseBody, Throwable error) {
                
            }
        });
        
        
        
    }
    


}