Android

安卓黑屏与锁屏 

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KeyguardManager km = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
boolean a = km.isKeyguardLocked(); // 锁屏（可能亮屏解锁中）
boolean b = km.inKeyguardRestrictedInputMode(); // 无锁屏（可能黑屏）或者已解锁

PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
boolean c = pm.isScreenOn(); // 黑屏