activity_main.xml:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.gaoyue20180521.MainActivity"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/et_username" android:layout_alignBottom="@+id/et_username" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginLeft="21dp" android:layout_marginStart="21dp" android:text="手机号" android:id="@+id/textView2" /> <EditText android:id="@+id/et_username" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="40dp" android:ems="10" android:hint="请输入手机号" /> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/et_password" android:layout_alignBottom="@+id/et_password" android:layout_alignLeft="@+id/textView2" android:layout_alignStart="@+id/textView2" android:text="密码" /> <EditText android:id="@+id/et_password" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/et_username" android:layout_alignStart="@+id/et_username" android:layout_below="@+id/et_username" android:layout_marginTop="47dp" android:ems="10" android:hint="请输入密码" android:password="true" /> <CheckBox android:id="@+id/ck_pwd" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView" android:layout_alignStart="@+id/textView" android:layout_below="@+id/et_password" android:layout_marginTop="44dp" android:text="记住密码" /> <CheckBox android:id="@+id/ck_login" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/ck_pwd" android:layout_alignBottom="@+id/ck_pwd" android:layout_alignEnd="@+id/et_password" android:layout_alignRight="@+id/et_password" android:text="自动登录" /> <Button android:id="@+id/btn_login" android:layout_width="300dp" android:layout_height="wrap_content" android:layout_below="@+id/ck_pwd" android:layout_centerHorizontal="true" android:layout_marginTop="71dp" android:text="提交" /> </RelativeLayout>
MainActivity:
package com.example.gaoyue20180521; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private EditText et_username; private EditText et_password; private CheckBox ck_pwd; private CheckBox ck_login; private Button btn_login; private SharedPreferences sp; private String userNameValue; private String passwordValue; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); sp = this.getSharedPreferences("userInfo", Context.MODE_WORLD_READABLE); et_username = (EditText) findViewById(R.id.et_username); et_password = (EditText) findViewById(R.id.et_password); ck_pwd = (CheckBox) findViewById(R.id.ck_pwd); ck_login = (CheckBox) findViewById(R.id.ck_login); btn_login = (Button) findViewById(R.id.btn_login); //判断记住密码多选框的状态 if (sp.getBoolean("ISCHECK", false)) { //设置默认是记录密码状态 ck_pwd.setChecked(true); et_username.setText(sp.getString("USER_NAME", "")); et_password.setText(sp.getString("PASSWORD", "")); //判断自动登陆多选框状态 if (sp.getBoolean("AUTO_ISCHECK", false)) { //设置默认是自动登录状态 ck_login.setChecked(true); //跳转界面 Intent intent = new Intent(MainActivity.this, Main2Activity.class); MainActivity.this.startActivity(intent); finish(); } } // 登录监听事件 现在默认为用户名为:liu 密码:123 btn_login.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { userNameValue = et_username.getText().toString(); passwordValue = et_password.getText().toString(); if (userNameValue.equals("13800138000") && passwordValue.equals("123456")) { Toast.makeText(MainActivity.this, "登录成功", Toast.LENGTH_SHORT).show(); //登录成功和记住密码框为选中状态才保存用户信息 if (ck_pwd.isChecked()) { //记住用户名、密码、 SharedPreferences.Editor editor = sp.edit(); editor.putString("USER_NAME", userNameValue); editor.putString("PASSWORD", passwordValue); editor.commit(); } //跳转界面 Intent intent = new Intent(MainActivity.this, Main2Activity.class); MainActivity.this.startActivity(intent); finish(); } else { Toast.makeText(MainActivity.this, "用户名或密码错误,请重新登录", Toast.LENGTH_LONG).show(); } } }); //监听记住密码多选框按钮事件 ck_pwd.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (ck_pwd.isChecked()) { System.out.println("记住密码已选中"); sp.edit().putBoolean("ISCHECK", true).commit(); } else { System.out.println("记住密码没有选中"); sp.edit().putBoolean("ISCHECK", false).commit(); } } }); //监听自动登录多选框事件 ck_login.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (ck_login.isChecked()) { System.out.println("自动登录已选中"); sp.edit().putBoolean("AUTO_ISCHECK", true).commit(); } else { System.out.println("自动登录没有选中"); sp.edit().putBoolean("AUTO_ISCHECK", false).commit(); } } }); } }