Android核心技术-day04-04-Web方式类qq登陆

package com.gaozewen.qqloginweb;


import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
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.qqloginweb.utils.StreamUtils;

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

public class MainActivity extends AppCompatActivity {

    private static final int GET_SERVER_RESP = 1;
    private static final int GET_ERROR = 2;
    private Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case GET_SERVER_RESP:
                    Toast.makeText(MainActivity.this, (String)msg.obj, Toast.LENGTH_SHORT).show();
                    break;
                case GET_ERROR:
                    Toast.makeText(MainActivity.this, "登陆失败", Toast.LENGTH_SHORT).show();
                    break;
            }
            mBt_login.setEnabled(true);
        }
    };

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

    /**
     * 1.定义一个共享参数（存放数据方便的 api）
     */
    private SharedPreferences sp;

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

        // 2. 通过上下文得到一个共享参数的实例对象
        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();
    }

    /**
     * 从 sp 文件中读取信息
     */
    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);

    }

    // 登陆按钮的点击事件
    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, "用户名和密码不能为空", Toast.LENGTH_SHORT).show();
        } else {
            // 判断是否要记录用户名和密码
            if (mCb_remember.isChecked()) {
                // 被选中状态需要记录用户名和密码
                // 3. 将数据保存到 sp 文件中
                SharedPreferences.Editor edit = sp.edit();
                edit.putString("qq", qq);
                edit.putString("password", password);
                edit.apply(); // apply() 异步开个线程执行 commit() 同步 立即执行
            }

            // 发请求时禁用 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("GET");
                        conn.setConnectTimeout(5000);
                        int code = conn.getResponseCode();
                        if (code == 200) {
                            InputStream is = conn.getInputStream();
                            String result = StreamUtils.readStream(is);
                            Message msg = Message.obtain();
                            msg.what = GET_SERVER_RESP;
                            msg.obj = result;
                            mHandler.sendMessage(msg);
                        } else {
                            Message msg = Message.obtain();
                            msg.what = GET_ERROR;
                            mHandler.sendMessage(msg);
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                        Message msg = Message.obtain();
                        msg.what = GET_ERROR;
                        mHandler.sendMessage(msg);
                    }
                }
            }.start();
        }


    }
}