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.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，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对我们网站的支持！