该博客介绍了如何在Android应用程序中使用Asynchttpclient库进行GET和POST网络请求。首先，它展示了如何初始化EditText控件以获取用户输入的用户名和密码。接着，详细说明了GET请求的实现，包括URL编码和设置请求路径。然后，通过AsyncHttpClient创建实例并定义响应处理。对于POST请求，同样展示了如何构建请求参数和发起请求。最后，处理了请求成功和失败的情况，显示服务器返回的数据。
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) {
}
});
}
}
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