Android SharedPreferences实现记住密码和自动登录界面

package com.liu.activity;  import android.app.Activity; import android.app.backup.SharedPreferencesBackupHelper; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; import android.os.Bundle; import android.text.Spannable; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.EditText; import android.widget.ImageButton; import android.widget.Toast;  public class LoginActivity extends Activity {   private EditText userName, password;  private CheckBox rem_pw, auto_login;  private Button btn_login;  private ImageButton btnQuit;  private String userNameValue,passwordValue;  private SharedPreferences sp;   public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);    //去除标题  this.requestWindowFeature(Window.FEATURE_NO_TITLE);  setContentView(R.layout.login);    //获得实例对象  sp = this.getSharedPreferences("userInfo", Context.MODE_WORLD_READABLE);  userName = (EditText) findViewById(R.id.et_zh);  password = (EditText) findViewById(R.id.et_mima);  rem_pw = (CheckBox) findViewById(R.id.cb_mima);  auto_login = (CheckBox) findViewById(R.id.cb_auto);  btn_login = (Button) findViewById(R.id.btn_login);  btnQuit = (ImageButton)findViewById(R.id.img_btn);      //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   rem_pw.setChecked(true);   userName.setText(sp.getString("USER_NAME", ""));   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    auto_login.setChecked(true);   //跳转界面   Intent intent = new Intent(LoginActivity.this,LogoActivity.class);   LoginActivity.this.startActivity(intent);      }  }    // 登录监听事件 现在默认为用户名为：liu 密码：123  btn_login.setOnClickListener(new OnClickListener() {    public void onClick(View v) {   userNameValue = userName.getText().toString();   passwordValue = password.getText().toString();      if(userNameValue.equals("liu")&&passwordValue.equals("123"))   {    Toast.makeText(LoginActivity.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(rem_pw.isChecked())    {    //记住用户名、密码、    Editor editor = sp.edit();    editor.putString("USER_NAME", userNameValue);    editor.putString("PASSWORD",passwordValue);    editor.commit();    }    //跳转界面    Intent intent = new Intent(LoginActivity.this,LogoActivity.class);    LoginActivity.this.startActivity(intent);    //finish();      }else{       Toast.makeText(LoginActivity.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  rem_pw.setOnCheckedChangeListener(new OnCheckedChangeListener() {   public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {   if (rem_pw.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  auto_login.setOnCheckedChangeListener(new OnCheckedChangeListener() {   public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {   if (auto_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();   }   }  });    btnQuit.setOnClickListener(new OnClickListener() {     @Override   public void onClick(View v) {   finish();   }  });   } }

package com.liu.activity; import android.app.Activity; import android.content.Intent; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; import android.opengl.ETC1; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.view.animation.AlphaAnimation; import android.view.animation.Animation; import android.view.animation.Animation.AnimationListener; import android.widget.Button; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.ProgressBar;  public class LogoActivity extends Activity {  private ProgressBar progressBar;  private Button backButton;   protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  // 去除标题  this.requestWindowFeature(Window.FEATURE_NO_TITLE);  setContentView(R.layout.logo);   progressBar = (ProgressBar) findViewById(R.id.pgBar);  backButton = (Button) findViewById(R.id.btn_back);   Intent intent = new Intent(this, WelcomeAvtivity.class);  LogoActivity.this.startActivity(intent);   backButton.setOnClickListener(new OnClickListener() {    @Override   public void onClick(View v) {   finish();    }  });   }  } 

package com.liu.activity;import android.app.Activity; import android.os.Bundle;  public class WelcomeAvtivity extends Activity {   @Override  protected void onCreate(Bundle savedInstanceState) {  // TODO Auto-generated method stub  super.onCreate(savedInstanceState);  setContentView(R.layout.welcome);  }  }

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:background="@drawable/logo_bg"  android:orientation="vertical" >   <RelativeLayout  android:layout_width="fill_parent"  android:layout_height="wrap_content" >  <ImageButton   android:id="@+id/img_btn"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_alignParentRight="true"   android:background="@drawable/quit"/>   <TextView   android:id="@+id/tv_zh"   android:layout_width="wrap_content"   android:layout_height="35dip"   android:layout_marginLeft="12dip"   android:layout_marginTop="10dip"   android:gravity="bottom"   android:text="帐号:"   android:textColor="#000000"   android:textSize="18sp" />   <EditText   android:id="@+id/et_zh"   android:layout_width="fill_parent"   android:layout_height="40dip"   android:layout_below="@id/tv_zh"   android:layout_marginLeft="12dip"   android:layout_marginRight="10dip" />   <TextView   android:id="@+id/tv_mima"   android:layout_width="wrap_content"   android:layout_height="35dip"   android:layout_below="@id/et_zh"   android:layout_marginLeft="12dip"   android:layout_marginTop="10dip"   android:gravity="bottom"   android:text="密码:"   android:textColor="#000000"   android:textSize="18sp" />   <EditText   android:id="@+id/et_mima"   android:layout_width="fill_parent"   android:layout_height="40dip"   android:layout_below="@id/tv_mima"   android:layout_marginLeft="12dip"   android:layout_marginRight="10dip"   android:maxLines="200"   android:password="true"   android:scrollHorizontally="true" />   <CheckBox   android:id="@+id/cb_mima"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_below="@id/et_mima"   android:layout_marginLeft="12dip"   android:text="记住密码"   android:textColor="#000000" />   <CheckBox   android:id="@+id/cb_auto"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_below="@id/cb_mima"   android:layout_marginLeft="12dip"   android:text="自动登录"   android:textColor="#000000" />  <Button   android:id="@+id/btn_login"   android:layout_width="80dip"   android:layout_height="40dip"   android:layout_below="@id/et_mima"   android:layout_alignParentRight="true"   android:layout_alignTop="@id/cb_auto"   android:layout_marginRight="10dip"   android:gravity="center"   android:text="登录"   android:textColor="#000000"   android:textSize="18sp"/>     </RelativeLayout>    </LinearLayout> 

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:background="@drawable/logo_bg"  android:orientation="vertical" >   <RelativeLayout  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:layout_weight="3">   <ProgressBar   android:id="@+id/pgBar"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_centerInParent="true" />   <TextView   android:id="@+id/tv1"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_below="@id/pgBar"   android:layout_centerHorizontal="true"   android:text="正在登录..."   android:textColor="#000000"   android:textSize="18sp" />  </RelativeLayout>   <LinearLayout  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:layout_weight="1"  android:gravity="center"  android:orientation="vertical" >   <Button   android:id="@+id/btn_back"   android:layout_width="70dip"   android:layout_height="35dip"   android:text="取消"   android:textColor="#000000"   android:textSize="12sp" />  </LinearLayout>   </LinearLayout> 

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:layout_gravity="center"  android:background="@drawable/login_bg"  android:orientation="vertical" >   <TextView  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:gravity="center"  android:text="登陆成功，进入用户界面"  android:textColor="#000000"  android:textSize="20sp" />  </LinearLayout>