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//onCreate裡面
    setContentView(R.layout.activity_alarm);
	if(Build.VERSION.SDK_INT >= 27){
        setShowWhenLocked(true);
        setTurnScreenOn(true);
    }
    else {
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
    }
 

Main.java:2: error: class, interface, or enum expected
    setContentView(R.layout.activity_alarm);
    ^
Main.java:3: error: class, interface, or enum expected
	if(Build.VERSION.SDK_INT >= 27){
	^
Main.java:5: error: class, interface, or enum expected
        setTurnScreenOn(true);
        ^
Main.java:6: error: class, interface, or enum expected
    }
    ^
Main.java:9: error: class, interface, or enum expected
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
        ^
Main.java:10: error: class, interface, or enum expected
    }
    ^
6 errors

Standard output is empty