每日总结2023-05-16

今天对Android记住密码以及自动登录做出了处理

首先进行了对与login页面的优化：

package com.example.math;
/*
 * 登录界面
 * */

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.preference.PreferenceManager;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.example.math.repositiory.user_res;

public class LoginActivity extends AppCompatActivity implements View.OnClickListener {

    private SharedPreferences pref;

    private SharedPreferences.Editor editor;

    private  CheckBox rememberCb;

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

        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);

        initData();
        savePassword();


    }

    private void savePassword() {
        pref = PreferenceManager.getDefaultSharedPreferences(this);
        EditText user_name = findViewById(R.id.userName);
        EditText user_password = findViewById(R.id.userPassword);

        rememberCb = findViewById(R.id.login_cb_ji);
        boolean isRemember = pref.getBoolean("remember",true);
        if(isRemember){
            String account = pref.getString("account","");
            String password = pref.getString("password","");
            user_name.setText(account);
            user_password.setText(password);
            rememberCb.setChecked(true);

        }
    }

    private void initData() {
        Button login_l = findViewById(R.id.login);
        TextView bt_zhu = findViewById(R.id.login_zhu);
        TextView bt_xiu = findViewById(R.id.login_xiu);
        login_l.setOnClickListener(this);
        bt_zhu.setOnClickListener(this);
        bt_xiu.setOnClickListener(this);
    }


    @SuppressLint("HandlerLeak")
    public Handler myHandler = new Handler(Looper.myLooper()) {
        @Override
        public void handleMessage(@NonNull Message msg) {

            if (msg.what == 1) {
                Intent intent1 = new Intent(getApplicationContext(), UserMainActivity.class);
                startActivity(intent1);
                finish();

                Toast.makeText(getApplicationContext(), "登录成功", Toast.LENGTH_LONG).show();
            } else {
                Toast.makeText(getApplicationContext(), "登录失败", Toast.LENGTH_LONG).show();
            }
        }
    };


    @SuppressLint("NonConstantResourceId")
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.login:
                EditText user_name = findViewById(R.id.userName);
                EditText user_password = findViewById(R.id.userPassword);
                rememberCb = findViewById(R.id.login_cb_ji);

                String userName = user_name.getText().toString();
                CustomApplication app = (CustomApplication) getApplication();
                app.setValue(userName);

                login(user_name.getText().toString(), user_password.getText().toString());
                editor = pref.edit();
                if (rememberCb.isChecked()) {
                    editor.putBoolean("remember", true);
                    editor.putString("account", userName);
                    editor.putString("password", user_password.getText().toString());
                } else {
                    editor.apply();
                }
                break;
            case R.id.login_zhu:
                startActivity(new Intent(getApplicationContext(), register_Activity.class));
                break;
            case R.id.login_xiu:
                startActivity(new Intent(getApplicationContext(), retrieve_Activity.class));
                break;
        }
    }

    /**
     * 登录功能
     */
    public void login(String name, String password) {
        new Thread() {
            @Override
            public void run() {


                boolean aa;
                try {
                    aa = user_res.user_login(name, password);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
                int msg = 0;
                if (aa) {
                    msg = 1;
                }
                myHandler.sendEmptyMessage(msg);
            }
        }.start();
    }
}

对于记住密码以及通过手机唯一标识自动登录还在研究中。