Android 使用HttpClient方式提交POST请求

final String username = usernameEditText.getText().toString().trim();
final String password = passwrodEditText.getText().toString().trim();
//Android默认模拟器外部的地址为10.0.2.2，而不是localhost和127.0.0.1
final String serverPath = "http://10.0.2.2:8080/LoginServlet";
if (TextUtils.isEmpty(username) || TextUtils.isEmpty(password)) {
//给出提示：账号密码不许为空
} else {
new Thread(new Runnable() {
@Override
public void run() {
try {
//创建浏览器
HttpClient httpClient = new DefaultHttpClient();
//创建一个post请求对象
HttpPost httpPost = new HttpPost(serverPath);
//创建请求参数
List<NameValuePair> parameters = new ArrayList<NameValuePair>();
parameters.add(new BasicNameValuePair("username",username));
parameters.add(new BasicNameValuePair("password",password));
//请求参数设置到httpPost的实体里
httpPost.setEntity(new UrlEncodedFormEntity(parameters, "UTF-8"));
//浏览器提交这个请求，然后服务器返回一个HttpResponse
HttpResponse httpResponse = httpClient.execute(httpPost);
//通过返回信息获取返回的状态码
int statusCode = httpResponse.getStatusLine().getStatusCode();
if (200 == statusCode) {
InputStream inputStream = httpResponse.getEntity().getContent();
final String responseMsg = StreamTool.getString(inputStream);
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, responseMsg, Toast.LENGTH_LONG).show();
}
});
} else {
System.out.println("statusCode = " + statusCode);
//连接服务器出错，错误代码为：responseCode 根据代码值告诉用户出错的原因
//....
}
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}
}