Android模仿用戶設(shè)置密碼實(shí)例

<?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="設(shè)置密碼" 
    android:padding="10dp" 
    /> 
  <EditText  
    android:id="@+id/et_password" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:inputType="textPassword" 
    android:hint="請(qǐng)輸入密碼" 
    /> 
  <EditText  
    android:id="@+id/et_password_confirm" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:inputType="textPassword" 
    android:hint="請(qǐng)?jiān)俅屋斎朊艽a" 
    /> 
  <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="確定" /> 
    <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> 

<?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="輸入密碼" 
    android:padding="10dp" 
    /> 
  <EditText  
    android:id="@+id/et_password" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:inputType="textPassword" 
    android:hint="請(qǐng)輸入密碼" 
    /> 
  <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="確定" /> 
    <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> 

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[] {"手機(jī)防盜", "通訊衛(wèi)士", "軟件管理", "進(jìn)程管理", "流量統(tǒng)計(jì)", "手機(jī)殺毒", "緩存清理", "高級(jí)工具", "設(shè)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()); 
    //監(jiān)聽(tīng)gridview點(diǎn)擊事件 
    gv_home.setOnItemClickListener(new OnItemClickListener(){ 
      @Override 
      public void onItemClick(AdapterView<?> parent, View view, 
          int position, long id) { 
        switch(position){ 
        case 0: 
          //手機(jī)防盜 
          showPasswordDialog(); 
          break; 
        case 8: 
          //設(shè)置中心 
          startActivity(new Intent(HomeActivity.this, SettingActivity.class)); 
          break; 
        default: 
          break; 
        } 
      } 
    }); 
  } 
  /* 
   * 顯示密碼的彈窗 
   */ 
  protected void showPasswordDialog(){ 
    //判斷是否設(shè)置密碼 
    String savePassword = mPref.getString("password", null); 
    if(!TextUtils.isEmpty(savePassword)){ 
      //輸入密碼的彈窗 
      showPasswordInputDialog(); 
    }else{ 
      //如果沒(méi)有設(shè)置過(guò)，彈出密碼設(shè)置的彈窗 
      showPasswordSetDialog(); 
    } 
  } 
  /* 
   * 輸入密碼框，設(shè)置過(guò)密碼只需要登陸 
   */ 
  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);//自定義的view設(shè)置到dialog 
    dialog.setView(view, 0, 0, 0, 0);//設(shè)置邊距為0，兼容android2.3 
    final EditText etPassword = (EditText) view.findViewById(R.id.et_password); 
    //獲取2個(gè)按鍵 
    Button btnOk = (Button)view.findViewById(R.id.btn_ok); 
    Button btnCancle = (Button)view.findViewById(R.id.btn_cancle); 
    //監(jiān)聽(tīng)ok按鍵 
    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, "登陸成功", Toast.LENGTH_SHORT).show(); 
            //對(duì)話框消失 
            dialog.dismiss(); 
            //跳轉(zhuǎn)到手機(jī)防盜界面 
            startActivity(new Intent(HomeActivity.this, LostAndFind.class)); 
          }else{ 
            Toast.makeText(HomeActivity.this, "登陸失敗", Toast.LENGTH_SHORT).show(); 
          } 
        }else{ 
          Toast.makeText(HomeActivity.this, "輸入框不能是空的", Toast.LENGTH_SHORT).show(); 
        } 
      } 
    }); 
    //監(jiān)聽(tīng)取消按鍵 
    btnCancle.setOnClickListener(new OnClickListener(){ 
      @Override 
      public void onClick(View v) { 
        dialog.dismiss(); 
      } 
    }); 
    dialog.show(); 
  } 
  /* 
   * 設(shè)置密碼的彈窗,以前沒(méi)有設(shè)置密碼 
   */ 
  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);//自定義的view設(shè)置到dialog 
    dialog.setView(view, 0, 0, 0, 0);//設(shè)置邊距為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); 
    //獲取2個(gè)按鍵 
    Button btnOk = (Button)view.findViewById(R.id.btn_ok); 
    Button btnCancle = (Button)view.findViewById(R.id.btn_cancle); 
    //監(jiān)聽(tīng)ok按鍵 
    btnOk.setOnClickListener(new OnClickListener(){ 
      @Override 
      public void onClick(View v) { 
        String password = etPassword.getText().toString(); 
        String passwordConfirm = etPasswordConfirm.getText().toString(); 
        //TextUtils.isEmpty(password)判斷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, "登陸成功", Toast.LENGTH_SHORT).show(); 
            //保存密碼到mPref 
            mPref.edit().putString("password", MD5Utils.encode(password)).commit(); 
            //對(duì)話框消失 
            dialog.dismiss(); 
            //跳轉(zhuǎn)到手機(jī)防盜界面 
            startActivity(new Intent(HomeActivity.this, LostAndFind.class)); 
          }else{ 
            Toast.makeText(HomeActivity.this, "兩次密碼不一致", Toast.LENGTH_SHORT).show(); 
          } 
        }else{ 
          Toast.makeText(HomeActivity.this, "輸入框不能是空的", Toast.LENGTH_SHORT).show(); 
        } 
      } 
    }); 
    //監(jiān)聽(tīng)取消按鍵 
    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; 
    } 
  } 
}