安卓学习笔记之使用设备管理器(Administrator)

安卓学习笔记之使用设备管理器(Administrator)

设备管理器的作用：

.锁定屏幕
.擦除数据（或恢复出厂设置）
.设置密码状态（重置密码 、限制密码长度、密码过期时间等）
.监视登录状态
.禁用摄像头
.加密存储
.禁用锁屏相关特性
.等

使用设备管理器的步骤：

1、获取设备管理器

DevicePolicyManager = policyManager = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE); //获取设备管理器
ComponentName componentName = new ComponentName(this, AdminReceiver.class); //创建设备组件 需要创建AdminReceiver

2.创建AdminReceiver

public class AdminReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

    }

}

3.在src目录下创建xml文件夹 并创建device_admin.xml文件 详细如下

<device-admin xmlns:android="http://schemas.android.com/apk/res/android">
  <uses-policies>
    <limit-password />
    <watch-login />
    <reset-password />
    <force-lock />
    <wipe-data />
    <expire-password />
    <encrypted-storage />
    <disable-camera />
    <disable-keyguard-features />
  </uses-policies>
</device-admin>

4、在values目录的strings文件中创建设备名称与描述

<resources>
    <string name="admin_description">设备管理器功能描述string>
    <string name="admin">设备管理器名称string>
resources>

5、AndroidManifest.xml中声明AdminReceiver

<receiver
            android:name="com.yu.onekeylock.AdminReceiver"
            android:description="@string/admin_description"
            android:label="@string/admin"
            -声明需要的权限-->
            android:permission="android.permission.BIND_DEVICE_ADMIN" >
            <meta-data
                android:name="android.app.device_admin"
                android:resource="@xml/device_admin" />

            <intent-filter>
                <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
            intent-filter>
        receiver>

6、使用设备管理器
在使用之前，需要判断是否激活

public void doit(View view) {
// 判断设备管理器是否激活
  if (policyManager.isAdminActive(componentName)) {
                    policyManager.lockNow(); // 锁屏
//                  policyManager.resetPassword("123456", 0); //重置密码
//                  policyManager.wipeData(flags);
                    finish();
                }else{
                    Toast.makeText(MainActivity.this    , "必须先激活设备管理器！", 1).show();
                    activateManage();
                }
}

激活设备管理器：

private void activateManage() {
        // 隐式启动
        Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
        //附加数据
        intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, componentName);
        //描述
        intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "激活后可以方便锁屏等操作");

        startActivity(intent);
    }

激活设备管理器后就可以进行相关功能操作了

                    policyManager.lockNow(); // 锁屏
//                  policyManager.resetPassword("123456", 0); //重置密码
//                  policyManager.wipeData(flags);
                    ...

注：要卸载应用时，需先取消激活设备管理器

public void unInstall(View view) {
        // 取消激活
        policyManager.removeActiveAdmin(componentName);
        // 卸载程序
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.addCategory(Intent.CATEGORY_DEFAULT);
        intent.setData(Uri.parse("package:" + getPackageName()));
        startActivity(intent);
    }

Admin工具类：

/**
 * 
Author: pecuyu
 * 
Date: 2017/12/8
 * 
TODO:Admin工具类
 */

public class AdminUtil {
    private Context mContext;
    private final DevicePolicyManager policyManager;
    private final ComponentName componentName;

    public AdminUtil(Context context) {
        mContext = context;
        policyManager = (DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);
        componentName = new ComponentName(context, AdminReceiver.class);
    }

    public void activateAdmin() {
        // 隐式启动
        Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
        //附加数据
        intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, componentName);
        //描述
        intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "激活后可以方便锁屏等操作");

        mContext.startActivity(intent);
    }

    public void uninstall() {
        // 取消激活
        policyManager.removeActiveAdmin(componentName);
        // 卸载程序
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.addCategory(Intent.CATEGORY_DEFAULT);
        intent.setData(Uri.parse("package:" + mContext.getPackageName()));
        mContext.startActivity(intent);
    }

    // 判断设备管理器是否激活
    public boolean isAdminActive() {
        return policyManager.isAdminActive(componentName);
    }

    public void lockNow() {
        policyManager.lockNow(); // 锁屏
    }

    public void disableCamera(boolean enable) {
        policyManager.setCameraDisabled(componentName, enable);

    }

    /**
     *
     * @param flags
     * {@link DevicePolicyManager#WIPE_EXTERNAL_STORAGE} and {
     * @link DevicePolicyManager#WIPE_RESET_PROTECTION_DATA}.
     */
    public void wipeData(int flags) {
        policyManager.wipeData(flags);
    }

    /**
     * 关闭特性功能
     *
     * @param which  which feature to disable 

     * know features: 

     *            
{@link  DevicePolicyManager#KEYGUARD_DISABLE_FEATURES_NONE} (default),
     *            
{@link DevicePolicyManager#KEYGUARD_DISABLE_WIDGETS_ALL},
     *            
{@link DevicePolicyManager#KEYGUARD_DISABLE_TRUST_AGENTS},
     *            
{@link DevicePolicyManager#KEYGUARD_DISABLE_UNREDACTED_NOTIFICATIONS},
     *            
{@link DevicePolicyManager#KEYGUARD_DISABLE_SECURE_NOTIFICATIONS},
     *            
{@link DevicePolicyManager#KEYGUARD_DISABLE_FINGERPRINT},
     *            
{@link DevicePolicyManager#KEYGUARD_DISABLE_FEATURES_ALL}
     */
    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public void disableFeature(int which) {
        policyManager.setKeyguardDisabledFeatures(componentName, which);
    }
}