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，
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设置对话框dialog_set_password.xml
<?xml version="1.0" encoding="utf-8"?>
输入对话框dialog_input_password.xml，
<?xml version="1.0" encoding="utf-8"?>
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创新互联网站的支持！
