package com.gaozewen.qqloginpost;


import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;

import com.gaozewen.qqloginpost.utils.StreamUtils;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

public class MainActivity extends AppCompatActivity {

    private static final int GET_SERVER_RESP = 1;
    private static final int GET_ERROR = 2;

    private EditText mEt_qqNumber;
    private EditText mEt_password;
    private CheckBox mCb_remember;
    private Button mBt_login;

    /**
     * 1.定義一個共享引數（存放資料方便的 api）
     */
    private SharedPreferences sp;

    // 新建 res/drawable-hdpi
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 2. 通過上下文得到一個共享引數的例項物件
        sp = this.getSharedPreferences("config", MODE_PRIVATE);

        mEt_qqNumber = findViewById(R.id.et_qqnumber);
        mEt_password = findViewById(R.id.et_password);
        mCb_remember = findViewById(R.id.cb_remember);
        mBt_login = findViewById(R.id.bt_login);
        readStore();
    }

    /**
     * 從 sp 檔案中讀取資訊
     */
    private void readStore() {
        // data/data/包名/shared_prefs
        String qq = sp.getString("qq", "");
        String password = sp.getString("password", "");
        mEt_qqNumber.setText(qq);
        mEt_password.setText(password);
        mCb_remember.setChecked(true);

    }

    // 登陸按鈕的點選事件
    public void login(View view) {
        final String qq = mEt_qqNumber.getText().toString().trim();
        final String password = mEt_password.getText().toString().trim();

        if (TextUtils.isEmpty(qq) || TextUtils.isEmpty(password)) {
            Toast.makeText(this, "使用者名稱和密碼不能為空", Toast.LENGTH_SHORT).show();
        } else {
            // 判斷是否要記錄使用者名稱和密碼
            if (mCb_remember.isChecked()) {
                // 被選中狀態需要記錄使用者名稱和密碼
                // 3. 將資料儲存到 sp 檔案中
                SharedPreferences.Editor edit = sp.edit();
                edit.putString("qq", qq);
                edit.putString("password", password);
                edit.apply(); // apply() 非同步開個執行緒執行 commit() 同步 立即執行
            }

            // 發請求時禁用 button
            mBt_login.setEnabled(false);
            new Thread() {
                @Override
                public void run() {
                    try {
                        Thread.sleep(5000);
                        String path = String.format("http://192.168.1.102:8080/login?username=%s&password=%s", qq, password);
                        URL url = new URL(path);
                        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                        conn.setRequestMethod("POST");
                        conn.setConnectTimeout(5000);

                        // 設定傳送資料為表單型別，會被新增到 HTTP body 中
                        conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
                        String data = String.format("username=%s&password=%s",URLEncoder.encode(qq,"utf-8"),URLEncoder.encode(password,"utf-8"));
                        conn.setRequestProperty("Content-Length", String.valueOf(data.length()));
                        // 指定請求輸出模式
                        conn.setDoOutput(true); // 運行當前的應用程式給伺服器寫資料
                        conn.getOutputStream().write(data.getBytes());

                        int code = conn.getResponseCode();
                        if (code == 200) {
                            InputStream is = conn.getInputStream();
                            String result = StreamUtils.readStream(is);

                            showToastInAnyThread(result);
                        } else {
                            showToastInAnyThread("請求失敗");
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                        showToastInAnyThread("請求失敗");
                    }
                }
            }.start();
        }


    }

    /**
     * 在任何執行緒中都可以呼叫 函式 Toast 方法
     * @param result
     */
    private void showToastInAnyThread(final String result) {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                Toast.makeText(getApplicationContext(),result, Toast.LENGTH_SHORT).show();
            }
        });
    }
}
 

第三方庫

import com.gaozewen.qqloginother.loopj.android.http.AsyncHttpClient;
import com.gaozewen.qqloginother.loopj.android.http.AsyncHttpResponseHandler;
import com.gaozewen.qqloginother.loopj.android.http.RequestParams;

import org.apache.http.Header;