Android点亮屏幕功能，关于屏幕是否亮屏和是否解锁的判断

野性酷女 2022-12-23 07:07 237阅读 0赞

## 1.点亮屏幕功能 ##

工具类：WakeLockUtil，相关代码如下：

public class WakeLockUtil { 
     
        /** * 点亮屏幕 * * @param timeout The timeout after which to release the wake lock, in milliseconds. */
        @Nullable
        public static PowerManager.WakeLock acquireWakeLock(@NonNull Context context, long timeout) { 
            PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
            if (pm == null)
                return null;
            PowerManager.WakeLock wakeLock = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP |
                            PowerManager.FULL_WAKE_LOCK |
                            PowerManager.ON_AFTER_RELEASE,
                    context.getClass().getName());
            wakeLock.acquire(timeout);
            return wakeLock;
        }
     
        public static void release(@Nullable PowerManager.WakeLock wakeLock) { 
            if (wakeLock != null && wakeLock.isHeld()) { 
                wakeLock.release();
            }
        }
    }

使用类：WakeLockActivity，相关代码如下：

public class WakeLockActivity extends AppCompatActivity { 
        private PowerManager.WakeLock mWakeLock;
     
        @Override
        protected void onCreate(Bundle savedInstanceState) { 
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            //点亮屏幕2分钟，2分钟后此方法会自动释放PowerManager.WakeLock
            mWakeLock = WakeLockUtil.acquireWakeLock(this, 2 * 60 * 1000);
        }
     
        @Override
        protected void onDestroy() { 
            super.onDestroy();
            WakeLockUtil.release(mWakeLock);
        }
    }

## 2.关于屏幕是否亮屏和是否解锁的判断 ##

### 1.屏幕是否亮屏： ###

PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
    //true为打开，false为关闭
    boolean ifOpen = powerManager.isScreenOn();

### 2.屏幕是否解锁： ###

KeyguardManager mKeyguardManager = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
    boolean flag = mKeyguardManager.inKeyguardRestrictedInputMode();

#### 当前的屏幕锁有五种设置，分别是没有设置屏幕锁，滑动解锁，图案解锁，PIN码解锁，密码解锁。如果没有设置屏幕锁，返回值会一直为FALSE。如果用户设置了屏幕锁（包括后四种锁中的任何一种），屏幕不亮时返回TRUE，屏幕亮时，解锁前返回TRUE，解锁后返回FALSE。 ####