android-studio - Android Studio、信息亭模式、单一用途设备、锁定任务模式

Question

我正在尝试创建一个单一用途的应用程序。
所以我创建了一个 BaseActivity，我的所有事件都继承自它。

它看起来像

public class LockDeviceActivity extends AppCompatActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


    }

    private void startLock() {


        if(mDevicePolicyManager.isLockTaskPermitted(getPackageName())) {
            /**
             * If lock task is permitted, we can lock the task. We can use an external DPM like
             * TestDPC provided by Google to manage lock task list.
             *
             * If the lock is obtained using TestDPC, features like status bar, home button, recent
             * apps, etc is disabled.
             *
             * To unlock we can programatically call stopLockTask() when users taps a button. But
             * in practice this should be done using a separate admin console or Confirm Credential.
             *
             * For API 23+ you can check if the lock is active by checking if
             * activityManager.getLockTaskModeState() == ActivityManager.LOCK_TASK_MODE_NONE
             */
            Log.d(TAG, "startLock() called");
            this.startLockTask();
        } else {
            /**
             * The device is not whitelisted.
             */
            Toast.makeText(this, "The app is not whitelisted for lock", Toast.LENGTH_SHORT).show();
        //    Timber.d("The app is not whitelisted for lock task");


            /**
             * We can still pin the app but it will not be locked.
             *
             * We can simply unlock by pressing recent and back button together.
             *
             * Unlocking by calling stopLockTask() on button click can be achieved as well.
             */
         //   Timber.d("just pinning the app");
            this.startLockTask();
        }

    }

所以当我第一次进入应用程序时，我可以看到一些固定的消息，我没问题。
问题是，当我从一个事件到另一个包含 Fragment 的事件执行意图时，我得到以下图像:



另外，我收到了一些系统 toast 消息:
“该应用程序未列入锁定白名单”

我怎样才能避免这种行为？
谢谢你们 。

Answer 1

1) 将设备重置为出厂默认设置
2) 跳过账户注册
3)安装应用程序然后关闭它
4) 运行 adb shell dpm set-device-owner <app-package-name>/.<AppAdminReceiver>5)确保你得到一个成功的结果。
6) 重新启动应用程序。

必须满足以下条件:
AndroidManifest.xml内application标签

<activity
            android:name=".AppActivity"
            android:label="Locked Activity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER" />
                <category android:name="android.intent.category.HOME"/>
                <category android:name="android.intent.category.DEFAULT"/>
            </intent-filter>
</activity>


<receiver
            android:name=".AppAdminReceiver"
            android:description="@string/app_name"
            android:label="@string/app_name"
            android:permission="android.permission.BIND_DEVICE_ADMIN">
            <meta-data
                android:name="android.app.device_admin"
                android:resource="@xml/device_admin_receiver" />
            <intent-filter>
                <action android:name="android.intent.action.DEVICE_ADMIN_ENABLED"/>
                <action android:name="android.intent.action.PROFILE_PROVISIONING_COMPLETE"/>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
            </intent-filter>
</receiver>

创建一个名为 AppAdminReceiver.java 的新 Java 类(留空就好)

public class AppAdminReceiver extends android.app.admin.DeviceAdminReceiver {
    
}

添加 device_admin_receiver.xml在 /res/xml目录

<?xml version="1.0" encoding="utf-8"?>
<device-admin>
    <uses-policies>
        <disable-keyguard-features/>
    </uses-policies>
</device-admin>

在 AppActivity.java调用 startLockTask()和 stopLockTask()

private ComponentName mAdminComponentName;
private DevicePolicyManager mDevicePolicyManager;
...

... onCreate(){

// Retrieve Device Policy Manager so that we can check whether we can
// lock to screen later
  mAdminComponentName = new ComponentName(this,AppAdminReceiver.class);
  mDevicePolicyManager = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
  if(mDevicePolicyManager.isDeviceOwnerApp(getPackageName())){
            // App is whitelisted
            setDefaultCosuPolicies(true);
  }
  else {
           // did you provision the app using <adb shell dpm set-device-owner ...> ?
  }
}

... onStart(){
// Consider locking your app here or by some other mechanism
// Active Manager is supported on Android M
  if(mDevicePolicyManager.isLockTaskPermitted(this.getPackageName())){
            ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
            if (am.getLockTaskModeState() == ActivityManager.LOCK_TASK_MODE_NONE) {
                setDefaultCosuPolicies(true);
                startLockTask();
            }
    }
}


... unlockApp(){
  ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);

  if (am.getLockTaskModeState() == ActivityManager.LOCK_TASK_MODE_LOCKED) {
    stopLockTask();
  }
  setDefaultCosuPolicies(false);

}

private void setDefaultCosuPolicies(boolean active){

        // Set user restrictions
        setUserRestriction(UserManager.DISALLOW_SAFE_BOOT, active);
        setUserRestriction(UserManager.DISALLOW_FACTORY_RESET, active);
        setUserRestriction(UserManager.DISALLOW_ADD_USER, active);
        setUserRestriction(UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA, active);
        setUserRestriction(UserManager.DISALLOW_ADJUST_VOLUME, active);

        // Disable keyguard and status bar
        mDevicePolicyManager.setKeyguardDisabled(mAdminComponentName, active);
        mDevicePolicyManager.setStatusBarDisabled(mAdminComponentName, active);

        // Enable STAY_ON_WHILE_PLUGGED_IN
        enableStayOnWhilePluggedIn(active);

        // Set system update policy
        if (active){
            mDevicePolicyManager.setSystemUpdatePolicy(mAdminComponentName,SystemUpdatePolicy.createWindowedInstallPolicy(60, 120));
        } else {
            mDevicePolicyManager.setSystemUpdatePolicy(mAdminComponentName,null);
        }

        // set this Activity as a lock task package
        mDevicePolicyManager.setLockTaskPackages(mAdminComponentName,active ? new String[]{getPackageName()} : new String[]{});

        IntentFilter intentFilter = new IntentFilter(Intent.ACTION_MAIN);
        intentFilter.addCategory(Intent.CATEGORY_HOME);
        intentFilter.addCategory(Intent.CATEGORY_DEFAULT);

        if (active) {
            // set Cosu activity as home intent receiver so that it is started
            // on reboot
            mDevicePolicyManager.addPersistentPreferredActivity(mAdminComponentName, intentFilter, new ComponentName(getPackageName(), AppActivity.class.getName()));
        } else {
            mDevicePolicyManager.clearPackagePersistentPreferredActivities(mAdminComponentName, getPackageName());
        }
    }

    private void setUserRestriction(String restriction, boolean disallow){
        if (disallow) {
            mDevicePolicyManager.addUserRestriction(mAdminComponentName,restriction);
        } else {
            mDevicePolicyManager.clearUserRestriction(mAdminComponentName,restriction);
        }
    }

    private void enableStayOnWhilePluggedIn(boolean enabled){
        if (enabled) {
            mDevicePolicyManager.setGlobalSetting(mAdminComponentName,Settings.Global.STAY_ON_WHILE_PLUGGED_IN,Integer.toString(BatteryManager.BATTERY_PLUGGED_AC| BatteryManager.BATTERY_PLUGGED_USB| BatteryManager.BATTERY_PLUGGED_WIRELESS));
        } else {
            mDevicePolicyManager.setGlobalSetting(mAdminComponentName,Settings.Global.STAY_ON_WHILE_PLUGGED_IN,"0");
        }
    }
}

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