所需权限：

关闭系统锁屏服务：

KeyguardManager keyguardManager = (KeyguardManager)getSystemService(Activity.KEYGUARD_SERVICE); KeyguardManager.KeyguardLock lock = keyguardManager.newKeyguardLock(KEYGUARD_SERVICE); lock.disableKeyguard();//关闭系统锁屏

这样在屏幕关闭重新打开时就看不到锁屏界面了

--------------------------------------------------------------

如果要防止系统休眠：

所需权限：

代码实现：

PowerManager pm = (PowerManager) this     .getSystemService(Context.POWER_SERVICE); wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK     | PowerManager.ON_AFTER_RELEASE, "ZAK"); if (null != wakeLock) {
    wakeLock.acquire(); }

或者禁止系统自动关屏:

所需权限：

代码实现：

setLockPatternEnabled(false);

public void setLockPatternEnabled(boolean enabled) {
    setBoolean(android.provider.Settings.System.LOCK_PATTERN_ENABLED,       enabled); } private void setBoolean(String systemSettingKey, boolean enabled) {
    android.provider.Settings.System.putInt(getContentResolver(),       systemSettingKey, enabled ? 1 : 0); }