SharedPreferences自动登录判断

来源：互联网发布：淘宝店铺怎么投诉编辑：程序博客网时间：2024/06/07 05:22

登录页面

package com.bw.sharedpreferences;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;

public class LoginActivity extends Activity {
private EditText name_ed, pass_ed;
private CheckBox jz_check, zd_check;
private Button login;
private SharedPreferences preferences;

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_login);    // 1.获取资源ID    name_ed = (EditText) findViewById(R.id.name_ed);    pass_ed = (EditText) findViewById(R.id.pass_ed);    jz_check = (CheckBox) findViewById(R.id.jz_check);    zd_check = (CheckBox) findViewById(R.id.zd_check);    login = (Button) findViewById(R.id.login);    preferences = getSharedPreferences("User", MODE_PRIVATE);    // 自动登录    boolean isChecked = preferences.getBoolean("isChecked", false);    if (isChecked) {        String name = preferences.getString("name", null);        String pass = preferences.getString("pass", null);        name_ed.setText(name);        pass_ed.setText(pass);        jz_check.setChecked(true);    }    // 记住密码    boolean zd_isChecked = preferences.getBoolean("zd_isChecked", false);    if (zd_isChecked) {        Intent intent = new Intent(LoginActivity.this, MainActivity.class);        startActivity(intent);        finish();    }    // 两者同时勾选    zd_check.setOnCheckedChangeListener(new OnCheckedChangeListener() {        @Override        public void onCheckedChanged(CompoundButton buttonView,                boolean isChecked) {            if (isChecked) {                jz_check.setChecked(true);            }        }    });    // 记住密码取消勾选 自动登录也取消    jz_check.setOnCheckedChangeListener(new OnCheckedChangeListener() {        @Override        public void onCheckedChanged(CompoundButton buttonView,                boolean isChecked) {            if (isChecked == false) {                zd_check.setChecked(false);            }        }    });    // 登录判断    login.setOnClickListener(new OnClickListener() {        @Override        public void onClick(View v) {            if (jz_check.isChecked()) {                String name = name_ed.getText().toString();// 用户名                String pass = pass_ed.getText().toString();// 密码                Editor edit = preferences.edit();                edit.putString("name", name);                edit.putString("pass", pass);                edit.putBoolean("isChecked", true);                edit.commit();            }            if (zd_check.isChecked()) {                Editor edit = preferences.edit();                edit.putBoolean("zd_isChecked", true);                edit.commit();            }            Intent intent = new Intent(LoginActivity.this, MainActivity.class);            startActivity(intent);            finish();            }        });    }}

布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent" ><EditText    android:id="@+id/name_ed"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_alignParentTop="true"    android:layout_centerHorizontal="true"    android:layout_marginTop="42dp"    android:ems="10"    android:hint="请输入账号" ></EditText><EditText    android:id="@+id/pass_ed"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_below="@+id/name_ed"    android:layout_centerHorizontal="true"    android:layout_marginTop="40dp"    android:ems="10"    android:hint="请输入密码" ></EditText><CheckBox    android:id="@+id/jz_check"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_alignLeft="@+id/pass_ed"    android:layout_centerVertical="true"    android:text="记住密码" /><CheckBox    android:id="@+id/zd_check"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_alignBottom="@+id/jz_check"    android:layout_alignRight="@+id/pass_ed"    android:text="自动登录" /><Button    android:id="@+id/login"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_alignParentBottom="true"    android:layout_centerHorizontal="true"    android:layout_marginBottom="82dp"    android:text="登录" /></RelativeLayout>

主界面

package com.bw.sharedpreferences;

public class MainActivity extends Activity {private Button button;private SharedPreferences preferences;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    button = (Button) findViewById(R.id.button1);    // 点击清空    button.setOnClickListener(new OnClickListener() {        @Override        public void onClick(View v) {            preferences = getSharedPreferences("User", MODE_PRIVATE);            Editor edit = preferences.edit();            edit.clear();            edit.commit();            Intent intent = new Intent(MainActivity.this,LoginActivity.class);            startActivity(intent);            finish();            }        });    }}

布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent" ><TextView    android:id="@+id/textView1"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_centerHorizontal="true"    android:layout_centerVertical="true"    android:text="登录成功"    android:textSize="20sp" /><Button    android:id="@+id/button1"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_alignLeft="@+id/textView1"    android:layout_alignParentBottom="true"    android:layout_marginBottom="57dp"    android:text="注销" /></RelativeLayout>

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