[Android] 螢幕保護

Want To

就像電腦的螢幕保護程式，當手機閒置一段時間，不會鎖螢幕或是螢幕暗下來

而是顯示我們想要的內容，例如輪播照片之類的


Try To

[Lock Screen/Keyguard]

• 取代系統原有的 Lock Screen/Keyguard
• May Relative API
• DevicePolicyManager
• KeyguardManager
• WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED, WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
• Issues:
• What is the different between Lock Screen and Keyguard means?
• Keyguard includes 螢幕鎖和圖案解鎖等。(refer. 1)
• Many events should be considered, ex:
• Screen off/on, Incoming call/SMS, Alert Message.....
• 是否可以在原有的 Lock Screen/Keyguard 上再執行自己的 application?
• Disable Lock Screen/Keyguard and using Service or Thread to record touch event. 如果事件間隔超過設定，則啟動 Activity。
  
  • Events handler problems.
  • Start Activity in Service is allowed?

// Using KeyguardManager can disable/re-enable keyguard
KeyguardManager mKeyguardManager = (KeyguardManager)getSystemService(Context.KEYGUARD_SERVICE); 
KeyguardLock mKeyguardLock = mKeyguardManager.newKeyguardLock("Activity1"); 
mKeyguardLock.disableKeyguard(); 

[Live Wallpaper]

• Live wallpaper still showing when screen is locked，所以若是僅顯示在螢幕鎖之下即可...
• 動態設定 live wallpaper，也就是當螢幕鎖了，才設定(因為應該要不影響 user 原有的桌步設定)，取消後恢復 user 原有設定。
• 但沒有正式官方的相官 method。

* Reference

1. android的KeyGuard_谢彦_新浪博客
2. [Android]替换系统的Lock Screen - sunny09290的专栏 - 博客频道 - CSDN.NET
3. Handling Screen OFF and Screen ON Intents