Kiosk-app 重启后只显示黑屏
Kiosk-app shows only black screen after reboot
我正在按照这两个类似的教程使用信息亭应用程序创建专用设备:
Tutorial 1 and Tutorial 2。
我设法创建了一个可用的应用程序,但是当设备(Android 5.1,API 22)重新启动时出现问题,我可以通过记录器看到该应用程序在后台运行,但主要 activity 没有出现,只有黑屏。
我所遵循的步骤在两个教程中都有描述,我更改最多的代码是以下关于主应用程序(称为 VmLoaderActivity)的代码:
private ComponentName mAdminComponentName = null;
private DevicePolicyManager mDevicePolicyManager = null;
private String thisAppPackageName = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mAdminComponentName = VmDeviceAdminReceiver.getComponentName(this);
mDevicePolicyManager = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
thisAppPackageName = getApplicationContext().getPackageName();
if (mDevicePolicyManager.isDeviceOwnerApp(thisAppPackageName)) {
setKioskPolicies();
}
}
private void setKioskPolicies() {
/*
* Allow only this package
*/
String[] allowedPackages = new String[] {
thisAppPackageName
};
mDevicePolicyManager.setLockTaskPackages(mAdminComponentName, allowedPackages);
/*
* Set our app as the default application.
*/
IntentFilter intentFilter = new IntentFilter(Intent.ACTION_MAIN);
intentFilter.addCategory(Intent.CATEGORY_HOME);
intentFilter.addCategory(Intent.CATEGORY_DEFAULT);
mDevicePolicyManager.addPersistentPreferredActivity(mAdminComponentName,
intentFilter, new ComponentName(thisAppPackageName, VmLoaderActivity.class.getName()));
/*
* Disable Keyguard so that when the device boots, our application will start immediately
* without the lock screen appearing.
*/
mDevicePolicyManager.setKeyguardDisabledFeatures(mAdminComponentName, KEYGUARD_DISABLE_FEATURES_ALL);
//mDevicePolicyManager.setKeyguardDisabled(mAdminComponentName, true); //for newer APIs
/*
* Keep our application awake
*/
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
/*
* Enable our app to be in fullscreen mode.
*/
int uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
View.SYSTEM_UI_FLAG_FULLSCREEN |
View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
getWindow().getDecorView().setSystemUiVisibility(uiOptions);
//Starts the lock task
startLockTask();
}
此外,这是清单的相关部分:
<activity
android:name="VmLoaderActivity"
android:screenOrientation="portrait">
<intent-filter>
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.DEFAULT" />
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity>
我已通过删除以下行解决了问题:
mDevicePolicyManager.setKeyguardDisabledFeatures(mAdminComponentName, KEYGUARD_DISABLE_FEATURES_ALL);
可能我插入了这个方法来代替教程 1 中的以下行:
mDevicePolicyManager.setKeyguardDisabled(mAdminComponentName, true);
因为后一种方法只适用于>23的API我的项目无法使用因为目标API是22的所以我一直在想直接替代是前一种,而不是我是"blocking" 必要的东西。
我正在按照这两个类似的教程使用信息亭应用程序创建专用设备: Tutorial 1 and Tutorial 2。 我设法创建了一个可用的应用程序,但是当设备(Android 5.1,API 22)重新启动时出现问题,我可以通过记录器看到该应用程序在后台运行,但主要 activity 没有出现,只有黑屏。
我所遵循的步骤在两个教程中都有描述,我更改最多的代码是以下关于主应用程序(称为 VmLoaderActivity)的代码:
private ComponentName mAdminComponentName = null;
private DevicePolicyManager mDevicePolicyManager = null;
private String thisAppPackageName = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mAdminComponentName = VmDeviceAdminReceiver.getComponentName(this);
mDevicePolicyManager = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
thisAppPackageName = getApplicationContext().getPackageName();
if (mDevicePolicyManager.isDeviceOwnerApp(thisAppPackageName)) {
setKioskPolicies();
}
}
private void setKioskPolicies() {
/*
* Allow only this package
*/
String[] allowedPackages = new String[] {
thisAppPackageName
};
mDevicePolicyManager.setLockTaskPackages(mAdminComponentName, allowedPackages);
/*
* Set our app as the default application.
*/
IntentFilter intentFilter = new IntentFilter(Intent.ACTION_MAIN);
intentFilter.addCategory(Intent.CATEGORY_HOME);
intentFilter.addCategory(Intent.CATEGORY_DEFAULT);
mDevicePolicyManager.addPersistentPreferredActivity(mAdminComponentName,
intentFilter, new ComponentName(thisAppPackageName, VmLoaderActivity.class.getName()));
/*
* Disable Keyguard so that when the device boots, our application will start immediately
* without the lock screen appearing.
*/
mDevicePolicyManager.setKeyguardDisabledFeatures(mAdminComponentName, KEYGUARD_DISABLE_FEATURES_ALL);
//mDevicePolicyManager.setKeyguardDisabled(mAdminComponentName, true); //for newer APIs
/*
* Keep our application awake
*/
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
/*
* Enable our app to be in fullscreen mode.
*/
int uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
View.SYSTEM_UI_FLAG_FULLSCREEN |
View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
getWindow().getDecorView().setSystemUiVisibility(uiOptions);
//Starts the lock task
startLockTask();
}
此外,这是清单的相关部分:
<activity
android:name="VmLoaderActivity"
android:screenOrientation="portrait">
<intent-filter>
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.DEFAULT" />
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity>
我已通过删除以下行解决了问题:
mDevicePolicyManager.setKeyguardDisabledFeatures(mAdminComponentName, KEYGUARD_DISABLE_FEATURES_ALL);
可能我插入了这个方法来代替教程 1 中的以下行:
mDevicePolicyManager.setKeyguardDisabled(mAdminComponentName, true);
因为后一种方法只适用于>23的API我的项目无法使用因为目标API是22的所以我一直在想直接替代是前一种,而不是我是"blocking" 必要的东西。