Android模仿用户设置密码实例

概述首先有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，

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.trojan,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d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d窗       showPasswordinputDialog();     }else{       //如果没有设置过，d出密码设置的d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);//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d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,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,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,"两次密码不一致",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;     }   } } 

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