记住密码和自动登录

来源：互联网发布：外交知乎编辑：程序博客网时间：2024/04/30 06:45

1，在AndroidMainfest文件中注册activity；运行不成功

2，在MainActivity.java文件中的Intent intent = new Intent();
intent.setClass(MainActivity.this,
SuccessActivity1.class);
这两句后边加这一句 startActivity(intent);
3，替换文件，改包名：package com.example.minitwittersimulate;
4，创建home.xml文件
5，创建LoginActivity.java文件
6，将LoginActivity.java中的MainActivity改为LoginAvtivity 此时运行显示错误，因为没有在
AndroidMainfest.xml文件中注册LoginActivity

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7，在AndroidMainfest中注册Activity。  

8，运行，成功！

LoginActivity.java

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package com.example.minitwittersimulate;  
  
  
  
import android.os.Bundle;  
import android.app.Activity;  
import android.view.Menu;  
import android.view.Window;  
import android.app.Activity;  
import android.content.Intent;  
import android.content.SharedPreferences;  
import android.os.Bundle;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.widget.Button;  
import android.widget.CheckBox;  
import android.widget.EditText;  
import android.widget.Toast;  
  
  
public class LoginActivity extends Activity {  
      
      
      
    private EditText etUsername;  
    private EditText etPassword;  
    private CheckBox cbRememberPass;  
    private CheckBox autologin1;  
    private Button btnLogin ;  
    private SharedPreferences sp;  
    private String userNameValue,passwordValue;  
      
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        requestWindowFeature(Window.FEATURE_NO_TITLE);  
        setContentView(R.layout.activity_main);  
          
        // 初始化用户名、密码、记住密码、自动登录、登录按钮  
        etUsername = (EditText) findViewById(R.id.etUsername);  
        etPassword = (EditText) findViewById(R.id.etPassword);  
        cbRememberPass = (CheckBox) findViewById(R.id.cbRememberPass);  
        autologin1 = (CheckBox) findViewById(R.id.autologin1);  
        btnLogin = (Button) findViewById(R.id.btnLogin);  
  
        sp = getSharedPreferences("userInfo", 0);  
        String name=sp.getString("USER_NAME", "");  
        String pass =sp.getString("PASSWORD", "");  
                  
  
        boolean choseRemember =sp.getBoolean("cbRememberPass", false);  
        boolean choseAutoLogin =sp.getBoolean("autologin1", false);  
          
          
        //如果上次选了记住密码，那进入登录页面也自动勾选记住密码，并填上用户名和密码  
        if(choseRemember){  
            etUsername.setText(name);  
            etPassword.setText(pass);  
            cbRememberPass.setChecked(true);  
        }  
        //如果上次登录选了自动登录，那进入登录页面也自动勾选自动登录  
        if(choseAutoLogin){  
            autologin1.setChecked(true);  
        }  
          
          
          
        btnLogin.setOnClickListener(new OnClickListener() {  
              
            // 默认可登录帐号xs,密码123  
            @Override  
            public void onClick(View arg0) {  
                userNameValue = etUsername.getText().toString();  
                passwordValue = etPassword.getText().toString();  
                SharedPreferences.Editor editor =sp.edit();  
                  
                // TODO Auto-generated method stub  
                if (userNameValue.equals("xs")  
                        && passwordValue.equals("123")) {  
                    Toast.makeText(LoginActivity.this, "登录成功",  
                            Toast.LENGTH_SHORT).show();  
                      
                    //保存用户名和密码  
                    editor.putString("USER_NAME", userNameValue);  
                    editor.putString("PASSWORD", passwordValue);  
                      
                    //是否记住密码  
                    if(cbRememberPass.isChecked()){                       
                        editor.putBoolean("cbRememberPass", true);                        
                    }else{  
                        editor.putBoolean("cbRememberPass", false);               
                    }  
  
                                                              
                    //是否自动登录  
                        if(autologin1.isChecked()){                           
                            editor.putBoolean("autologin1", true);                            
                        }else{  
                            editor.putBoolean("autologin1", false);  
                        }  
                    editor.commit();  
                          
                    //跳转  
                    //Intent intent =new Intent(MainActivity.this,SuccessActivity1.class);  
                    //startActivity(intent);  
                      
                    Intent intent = new Intent();  
                    intent.setClass(LoginActivity.this, SuccessActivity.class);  
                    startActivity(intent);  
                      
                      
                      
                      
                } else {  
                    Toast.makeText(LoginActivity.this, "用户名或密码错误，请重新登录!",  
                            Toast.LENGTH_SHORT).show();  
                }  
  
            }  
  
        });  
         
  
    }  
  
          
          
      
  
    @Override  
    public boolean onCreateOptionsMenu(Menu menu) {  
        // Inflate the menu; this adds items to the action bar if it is present.  
        getMenuInflater().inflate(R.menu.main, menu);  
        return true;  
    }  
  
}  

MainActivity.java

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package com.example.minitwittersimulate;  
  
import android.app.Activity;  
import android.content.Intent;  
import android.content.SharedPreferences;  
import android.os.Bundle;  
import android.view.View;  
import android.widget.TextView;  
import android.widget.Toast;  
  
public class MainActivity extends Activity {  
    private SharedPreferences sp;  
    private TextView talk;  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.home);       
          
        talk =(TextView) findViewById(R.id.talk);  
          
        sp=getSharedPreferences("userInfo", 0);  
        String name =sp.getString("USER_NAME", "");  
        boolean choseAutoLogin =sp.getBoolean("autologin1", false);  
        if(choseAutoLogin){  
            talk.setVisibility(0);  
            talk.setText(name+"自动登录成功");  
              
            Intent intent = new Intent();  
            intent.setClass(MainActivity.this, SuccessActivity.class);  
            startActivity(intent);  
        }  
  
    }  
    //跳转到登录页面  
    public void go(View v){  
        //Intent intent =new Intent(this, LoginActivity.class);  
        //startActivity(intent);  
        Intent intent = new Intent();  
        intent.setClass(MainActivity.this, LoginActivity.class);  
        startActivity(intent);  
    }  
      
    //点击退出销毁登录记录  
    public void out(View v){  
        SharedPreferences spout =getSharedPreferences("userInfo", 0);  
        SharedPreferences.Editor ed =spout.edit();  
        ed.clear();  
        ed.commit();  
        Toast.makeText(this, "销毁记录", Toast.LENGTH_SHORT).show();  
    }  
}  

SuccessActiviy.java

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package com.example.minitwittersimulate;  
  
  
import android.app.Activity;  
import android.os.Bundle;  
import android.view.View;  
  
public class SuccessActivity extends Activity {  
      
  
      
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.sucess);  
    }  
    public void outactivity(View v){  
          
        System.exit(0);  
    }  
}  

activity_main.xml

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<LinearLayout 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"  
    android:orientation="vertical"  
    android:background="@drawable/loginbg"  
    android:paddingBottom="@dimen/activity_vertical_margin"  
    android:paddingLeft="@dimen/activity_horizontal_margin"  
    android:paddingRight="@dimen/activity_horizontal_margin"  
    android:paddingTop="@dimen/activity_vertical_margin"  
    tools:context=".MainActivity" >  
  
  <include layout="@layout/login_top"/>   
  <include layout="@layout/login_bottom"/>"  
  
</LinearLayout>  

home.xml

<?xml version="1.0" encoding="utf-8"?>

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
    android:background="@drawable/loginbg"  
    android:orientation="vertical" >  
  
    <TextView  
        android:id="@+id/talk"  
        android:layout_width="match_parent"  
        android:layout_height="30dp"  
        android:text="文本"   
        android:gravity="center"  
        android:visibility="gone"  
        />  
      
    <Button  
        android:id="@+id/gologin"  
        android:layout_width="match_parent"  
        android:layout_height="wrap_content"  
        android:text="登录"   
        android:onClick="go"  
        />  
    <Button  
        android:id="@+id/out"  
        android:layout_width="match_parent"  
        android:layout_height="wrap_content"  
        android:text="注销"   
         android:onClick="out"  
        />  
</LinearLayout>  

login_bottom.xml

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<?xml version="1.0" encoding="utf-8"?>  
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:layout_width="match_parent"  
    android:layout_height="wrap_content" >  
  
    <TextView  
        android:id="@+id/tvRegist"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignParentLeft="true"  
        android:layout_alignParentTop="true"  
        android:layout_marginLeft="21dp"  
        android:layout_marginTop="18dp"  
        android:text="@string/tvRegister"  
        android:autoLink="all"  
        android:textColorLink="#FF0066CC" />  
  
    <ImageView  
        android:id="@+id/imageView1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignParentBottom="true"  
        android:layout_alignParentRight="true"  
        android:layout_marginBottom="24dp"  
        android:src="@drawable/panda" />  
  
    <ImageView  
        android:id="@+id/imageView2"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignParentBottom="true"  
        android:layout_centerHorizontal="true"  
        android:layout_marginBottom="28dp"  
        android:src="@drawable/icon" />  
  
</RelativeLayout>  

login_bottom.xml

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<?xml version="1.0" encoding="utf-8"?>  
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:layout_width="match_parent"  
    android:layout_height="wrap_content"  
    android:background="@drawable/btnbg_roundcorner"  
    android:paddingBottom="@dimen/activity_vertical_margin"  
    android:paddingLeft="@dimen/activity_horizontal_margin"  
    android:paddingRight="@dimen/activity_horizontal_margin"  
    android:paddingTop="@dimen/activity_vertical_margin" >  
  
    <TextView  
        android:id="@+id/tvUsername"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignParentLeft="true"  
        android:layout_alignParentTop="true"  
        android:text="@string/tvName"  
        android:textAppearance="?android:attr/textAppearanceMedium" />  
  
    <EditText  
        android:id="@+id/etUsername"  
        android:layout_width="match_parent"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/tvUsername"  
        android:layout_below="@+id/tvUsername"  
        android:background="@android:drawable/edit_text"  
        android:ems="10" >  
  
        <requestFocus />  
    </EditText>  
  
    <TextView  
        android:id="@+id/tvPassword"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/etUsername"  
        android:layout_below="@+id/etUsername"  
        android:text="@string/tvPassword"  
        android:textAppearance="?android:attr/textAppearanceMedium" />  
  
    <EditText  
        android:id="@+id/etPassword"  
        android:layout_width="match_parent"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/tvPassword"  
        android:layout_below="@+id/tvPassword"  
        android:layout_marginTop="16dp"  
        android:background="@android:drawable/edit_text"  
        android:ems="10"  
        android:inputType="textPassword" />  
  
    <Button  
        android:id="@+id/btnLogin"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignRight="@+id/etPassword"  
        android:layout_below="@+id/etPassword"  
        android:layout_marginTop="20dp"  
        android:background="#FF72CAE1"  
        android:text="@string/btnLogin" />  
  
    <CheckBox  
        android:id="@+id/cbRememberPass"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/etPassword"  
        android:layout_alignTop="@+id/btnLogin"  
        android:text="记住密码" />  
  
    <CheckBox  
        android:id="@+id/autologin1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/cbRememberPass"  
        android:layout_below="@+id/cbRememberPass"  
        android:text="自动登录" />  
  
</RelativeLayout>  

success.xml

<?xml version="1.0" encoding="utf-8"?>

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
    android:background="@drawable/loginbg"  
    android:orientation="vertical" >  
  
    <TextView  
        android:id="@+id/textView1"  
        android:layout_width="match_parent"  
        android:layout_height="30dp"  
        android:gravity="center"  
        android:text="登录成功，重启程序才可以看到效果哦~" />  
      
</LinearLayout>  

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