Android模仿用户设置密码实例

首先有2个对话框，没有设置过密码，需要设置dialog_set_password.xml，用户设置过密码，不需要设置，直接输入密码dialog_input_password.xml，

设置对话框dialog_set_password.xml

<?xml version="1.0" encoding="utf-8"?> 
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  android:orientation="vertical" > 
  <textview  
    android:id="@+id/textview1" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:gravity="center" 
    android:textcolor="@color/black" 
    android:textsize="20sp" 
    android:background="#66ff00" 
    android:text="设置密码" 
    android:padding="10dp" 
    /> 
  <edittext  
    android:id="@+id/et_password" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:inputtype="textpassword" 
    android:hint="请输入密码" 
    /> 
  <edittext  
    android:id="@+id/et_password_confirm" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:inputtype="textpassword" 
    android:hint="请再次输入密码" 
    /> 
  <linearlayout  
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    > 
    <button 
      android:id="@+id/btn_ok" 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="1" 
      android:text="确定" /> 
    <button 
      android:id="@+id/btn_cancle" 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="1" 
      android:text="取消" /> 
  </linearlayout> 
</linearlayout> 

输入对话框dialog_input_password.xml，

<?xml version="1.0" encoding="utf-8"?> 
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  android:orientation="vertical" > 
  <textview  
    android:id="@+id/textview1" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:gravity="center" 
    android:textcolor="@color/black" 
    android:textsize="20sp" 
    android:background="#66ff00" 
    android:text="输入密码" 
    android:padding="10dp" 
    /> 
  <edittext  
    android:id="@+id/et_password" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:inputtype="textpassword" 
    android:hint="请输入密码" 
    /> 
  <linearlayout  
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    > 
    <button 
      android:id="@+id/btn_ok" 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="1" 
      android:text="确定" /> 
    <button 
      android:id="@+id/btn_cancle" 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="1" 
      android:text="取消" /> 
  </linearlayout> 
</linearlayout> 

业务逻辑并实现md5加密

package com.ldw.safe.activity; 
import android.app.activity; 
import android.app.alertdialog; 
import android.content.intent; 
import android.content.sharedpreferences; 
import android.os.bundle; 
import android.text.textutils; 
import android.view.view; 
import android.view.view.onclicklistener; 
import android.view.viewgroup; 
import android.widget.adapterview; 
import android.widget.adapterview.onitemclicklistener; 
import android.widget.baseadapter; 
import android.widget.button; 
import android.widget.edittext; 
import android.widget.gridview; 
import android.widget.imageview; 
import android.widget.textview; 
import android.widget.toast; 
import com.ldw.safe.r; 
import com.ldw.safe.utils.md5utils; 
public class homeactivity extends activity{ 
  private gridview gv_home; 
  private string[] mitems = new string[] {"手机防盗", "通讯卫士", "软件管理", "进程管理", "流量统计", "手机杀毒", "缓存清理", "高级工具", "设置中心"}; 
  private int[] mpics = new int[] {r.drawable.safe, r.drawable.callmsgsafe, r.drawable.app,  
      r.drawable.taskmanager, r.drawable.netmanager, r.drawable.sysoptimize,  
      r.drawable.*, r.drawable.atools, r.drawable.settings}; 
  private sharedpreferences mpref; 
  @override 
  protected void oncreate(bundle savedinstancestate) { 
    super.oncreate(savedinstancestate); 
    setcontentview(r.layout.activity_home); 
    mpref = getsharedpreferences("config", mode_private); 
    gv_home = (gridview) findviewbyid(r.id.gv_home); 
    gv_home.setadapter(new homeadapter()); 
    //监听gridview点击事件 
    gv_home.setonitemclicklistener(new onitemclicklistener(){ 
      @override 
      public void onitemclick(adapterview<?> parent, view view, 
          int position, long id) { 
        switch(position){ 
        case 0: 
          //手机防盗 
          showpassworddialog(); 
          break; 
        case 8: 
          //设置中心 
          startactivity(new intent(homeactivity.this, settingactivity.class)); 
          break; 
        default: 
          break; 
        } 
      } 
    }); 
  } 
  /* 
   * 显示密码的弹窗 
   */ 
  protected void showpassworddialog(){ 
    //判断是否设置密码 
    string savepassword = mpref.getstring("password", null); 
    if(!textutils.isempty(savepassword)){ 
      //输入密码的弹窗 
      showpasswordinputdialog(); 
    }else{ 
      //如果没有设置过，弹出密码设置的弹窗 
      showpasswordsetdialog(); 
    } 
  } 
  /* 
   * 输入密码框，设置过密码只需要登陆 
   */ 
  protected void showpasswordinputdialog(){ 
    alertdialog.builder builder = new alertdialog.builder(this); 
    final alertdialog dialog = builder.create(); 
    view view = view.inflate(this, r.layout.dialog_input_password, null); 
    //dialog.setview(view);//自定义的view设置到dialog 
    dialog.setview(view, 0, 0, 0, 0);//设置边距为0，兼容android2.3 
    final edittext etpassword = (edittext) view.findviewbyid(r.id.et_password); 
    //获取2个按键 
    button btnok = (button)view.findviewbyid(r.id.btn_ok); 
    button btncancle = (button)view.findviewbyid(r.id.btn_cancle); 
    //监听ok按键 
    btnok.setonclicklistener(new onclicklistener(){ 
      @override 
      public void onclick(view v) { 
        string password = etpassword.gettext().tostring(); 
        if(!textutils.isempty(password)){ 
          string savepassword = mpref.getstring("password", null); 
          if(md5utils.encode(password).equals(savepassword)){ 
            toast.maketext(homeactivity.this, "登陆成功", toast.length_short).show(); 
            //对话框消失 
            dialog.dismiss(); 
            //跳转到手机防盗界面 
            startactivity(new intent(homeactivity.this, lostandfind.class)); 
          }else{ 
            toast.maketext(homeactivity.this, "登陆失败", toast.length_short).show(); 
          } 
        }else{ 
          toast.maketext(homeactivity.this, "输入框不能是空的", toast.length_short).show(); 
        } 
      } 
    }); 
    //监听取消按键 
    btncancle.setonclicklistener(new onclicklistener(){ 
      @override 
      public void onclick(view v) { 
        dialog.dismiss(); 
      } 
    }); 
    dialog.show(); 
  } 
  /* 
   * 设置密码的弹窗,以前没有设置密码 
   */ 
  protected void showpasswordsetdialog(){ 
    alertdialog.builder builder = new alertdialog.builder(this); 
    final alertdialog dialog = builder.create(); 
    view view = view.inflate(this, r.layout.dialog_set_password, null); 
    //dialog.setview(view);//自定义的view设置到dialog 
    dialog.setview(view, 0, 0, 0, 0);//设置边距为0，兼容android2.3 
    final edittext etpassword = (edittext) view.findviewbyid(r.id.et_password); 
    final edittext etpasswordconfirm = (edittext) view.findviewbyid(r.id.et_password_confirm); 
    //获取2个按键 
    button btnok = (button)view.findviewbyid(r.id.btn_ok); 
    button btncancle = (button)view.findviewbyid(r.id.btn_cancle); 
    //监听ok按键 
    btnok.setonclicklistener(new onclicklistener(){ 
      @override 
      public void onclick(view v) { 
        string password = etpassword.gettext().tostring(); 
        string passwordconfirm = etpasswordconfirm.gettext().tostring(); 
        //textutils.isempty(password)判断password是不是空，可以避免都是空格 
        if(!textutils.isempty(password) && !passwordconfirm.isempty()){ 
          if(password.equals(passwordconfirm)){ 
            toast.maketext(homeactivity.this, "登陆成功", toast.length_short).show(); 
            //保存密码到mpref 
            mpref.edit().putstring("password", md5utils.encode(password)).commit(); 
            //对话框消失 
            dialog.dismiss(); 
            //跳转到手机防盗界面 
            startactivity(new intent(homeactivity.this, lostandfind.class)); 
          }else{ 
            toast.maketext(homeactivity.this, "两次密码不一致", toast.length_short).show(); 
          } 
        }else{ 
          toast.maketext(homeactivity.this, "输入框不能是空的", toast.length_short).show(); 
        } 
      } 
    }); 
    //监听取消按键 
    btncancle.setonclicklistener(new onclicklistener(){ 
      @override 
      public void onclick(view v) { 
        dialog.dismiss(); 
      } 
    }); 
    dialog.show(); 
  } 
  class homeadapter extends baseadapter{ 
    @override 
    public int getcount() { 
      // todo auto-generated method stub 
      return mitems.length; 
    } 
    @override 
    public object getitem(int position) { 
      // todo auto-generated method stub 
      return mitems[position]; 
    } 
    @override 
    public long getitemid(int position) { 
      // todo auto-generated method stub 
      return position; 
    } 
    @override 
    public view getview(int position, view convertview, viewgroup parent) { 
      view view = view.inflate(homeactivity.this, r.layout.home_list_item, null); 
      imageview iv_item = (imageview) view.findviewbyid(r.id.iv_item); 
      textview tv_item = (textview) view.findviewbyid(r.id.tv_item); 
      iv_item.setimageresource(mpics[position]); 
      tv_item.settext(mitems[position]); 
      return view; 
    } 
  } 
} 

以上所述是小编给大家介绍的android模仿用户设置密码实例，希望对大家有所帮助