需求描述：锁屏软件就是点击应用然后直接锁屏，不会弹出任何界面
设计思路：应用启动以后通过getSystemService获取系统的服务，调用安卓系统的DevicePolicyManager和ComponentName来对系统进行操作，先判断用户是否有相应的权限，如果有，直接锁屏，如果没有就先获取系统权限，再锁屏
废话不说，直接上代码
Main.java(主页面)
1 package com.example.wangshibang.screenlock;
2
3 import android.app.Activity;
4 import android.app.admin.DevicePolicyManager;
5 import android.content.ComponentName;
6 import android.content.Context;
7 import android.content.Intent;
8 import android.os.Bundle;
9
10 /**
11 * Created by wangshibang on 2016-11-8.
12 */
13 public class Main extends Activity {
14 private DevicePolicyManager policyManager;//管理和操作设备的API
15 private ComponentName componentName;//打开其他应用程序中的Activity或服务
16
17 @Override
18 protected void onCreate(Bundle savedInstanceState) {
19 super.onCreate(savedInstanceState);
20 setContentView(R.layout.activity_main);
21
22 //获取设备管理服务
23 policyManager = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);
24 //AdminReceiver 继承自 DeviceAdminReceiver
25 componentName = new ComponentName(this, AdminReceiver.class);
26
27 //主方法
28 myLock();
29
30 //killMyself ，锁屏之后就立即kill掉我们的Activity，避免资源的浪费
31 android.os.Process.killProcess(android.os.Process.myPid());
32 }
33
34 private void myLock(){
35 boolean isActive = policyManager.isAdminActive(componentName);
36 if(!isActive){
37 //若没有权限就去获取权限
38 activeManage();
39
40 return;
41 //锁屏
42 //policyManager.lockNow();
43 }
44 else {
45 policyManager.lockNow();
46 }
47 }
48
49 private void activeManage(){
50 //启动设备管理(隐式Intent) - 在AndroidManifest.xml中设定相应过滤器
51 Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
52 //权限列表
53 intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, componentName);
54 //描述(additional explanation)
55 intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "----Other Description----");
56 startActivityForResult(intent, 0);
57 }
58 }
AdminReceiver.java
1 package com.example.wangshibang.screenlock;
2
3 import android.app.admin.DeviceAdminReceiver;
4 import android.content.Context;
5 import android.content.Intent;
6 import android.content.SharedPreferences;
7 import android.widget.Toast;
8
9 /**
10 * Created by wangshibang on 2016-11-8.
11 */
12 public class AdminReceiver extends DeviceAdminReceiver {
13
14 public static SharedPreferences getDevicePreference(Context context){
15 //获取设备存储的数值
16 return context.getSharedPreferences(DeviceAdminReceiver.class.getName(),0);
17 }
18
19 // 密码的特点
20 public static String PREF_PASSWORD_QUALITY = "password_quality";
21 // 密码的长度
22 public static String PREF_PASSWORD_LENGTH = "password_length";
23
24 public static String PREF_MAX_FAILED_PW = "max_failed_pw";
25
26 void showToast(Context context, CharSequence text) {
27 Toast.makeText(context, text, Toast.LENGTH_SHORT).show();
28 }
29
30 @Override
31 public void onEnabled(Context context, Intent intent) {
32 // TODO Auto-generated method stub
33 showToast(context, "设备管理：可用");
34 }
35
36 @Override
37 public void onDisabled(Context context, Intent intent) {
38 // TODO Auto-generated method stub
39 showToast(context, "Deactive successful!");
40 }
41
42 @Override
43 public CharSequence onDisableRequested(Context context, Intent intent) {
44 // TODO Auto-generated method stub
45 return "Are you sure want to Deactive？";
46 }
47
48 @Override
49 public void onPasswordChanged(Context context, Intent intent) {
50 // TODO Auto-generated method stub
51 showToast(context, "设备管理：密码己经改变");
52 }
53
54 @Override
55 public void onPasswordFailed(Context context, Intent intent) {
56 // TODO Auto-generated method stub
57 showToast(context, "设备管理：改变密码失败");
58 }
59
60 @Override
61 public void onPasswordSucceeded(Context context, Intent intent) {
62 // TODO Auto-generated method stub
63 showToast(context, "设备管理：改变密码成功");
64 }
65 }
AndroidManifest.xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 3 package="com.example.wangshibang.screenlock"> 4 5 <application 6 android:allowBackup="true" 7 android:icon="@mipmap/lock" 8 android:label="@string/app_name" 9 android:supportsRtl="true" 10 android:theme="@style/AppTheme"> 11 <activity android:name=".Main" 12 android:label="@string/app_name" 13 android:theme="@android:style/Theme.NoDisplay"> 14 <intent-filter> 15 <action android:name="android.intent.action.MAIN" /> 16 <category android:name="android.intent.category.LAUNCHER" /> 17 </intent-filter> 18 </activity> 19 <!-- 设备管理 --> 20 <receiver 21 android:name=".AdminReceiver" 22 android:label="ScreenLock" 23 android:permission="android.permission.BIND_DEVICE_ADMIN"> 24 <meta-data 25 android:name="android.app.device_admin" 26 android:resource="@xml/lock_screen" /> 27 <intent-filter> 28 <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" /> 29 </intent-filter> 30 </receiver> 31 </application> 32 33 </manifest>
res文件夹下建一个xml文件夹，里面有个lock_screen.xml文件
lock_screen.xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <device-admin xmlns:android="http://schemas.android.com/apk/res/android"> 3 <uses-policies> 4 <!-- 强行锁定 在里仅这个是需要的--> 5 <force-lock /> 6 <!-- 清除所有数据（恢复出厂设置） --> 7 <wipe-data /> 8 <!-- 重置密码 --> 9 <reset-password /> 10 <!-- 限制密码选择 --> 11 <limit-password /> 12 <!-- 监控登录尝试 --> 13 <watch-login /> 14 </uses-policies> 15 </device-admin>
最后是什么都没有的activity_main.xml文件
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 android:orientation="vertical" android:layout_width="match_parent" 4 android:layout_height="match_parent"> 5 6 </LinearLayout>
楼主才疏学浅，不喜勿喷
最后附上源码的链接：链接：http://pan.baidu.com/s/1i5x5s6x 密码：es42
时间： 2024-10-08 19:35:18