如何启动设备的活动，即使屏幕locked.i尝试如下，但它不工作。

广播接收器 -

 意图alarmIntent =新的意向书（android.intent.action.MAIN）;
        alarmIntent.setClass（背景下，Alarm.class）;
        alarmIntent.setFlags（Intent.FLAG_ACTIVITY_NEW_TASK）;
        alarmIntent.addFlags（WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED + WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD + WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON + WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON）;
        context.startActivity（alarmIntent）;
 

解决方案

您需要在的Andr​​oidManifest.xml 文件以下权限：

 ＆LT;使用-权限的Andr​​oid：名称=android.permission.WAKE_LOCK/＆GT;
＆LT;使用-权限的Andr​​oid：名称=android.permission.DISABLE_KEYGUARD/＆GT;
 

检查清单的详细信息here.您可以检查此link你查询。

How to start activity on device even if screen is locked.i tried as below but its not working.

broadcast receiver-

Intent alarmIntent = new Intent("android.intent.action.MAIN");
        alarmIntent.setClass(context, Alarm.class);
        alarmIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        alarmIntent.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED + WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD + WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON + WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
        context.startActivity(alarmIntent);

You need the following permission in AndroidManifest.xml file:

<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.DISABLE_KEYGUARD" />

Check the manifest details here. You can check this link on you query.