Android截屏事件监听

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1、Android截屏事件监听1.前言Android系统没有直接对截屏事件监听的接口，也没有广播，只能自己动手来丰衣足食，一般有三种方法。利用FileObserver监听某个目录中资源变化情况利用ContentObserver监听全部资源的变化监听截屏快捷按键由于厂商自定义Android系统的多样性，再加上快捷键的不同以及第三方应用，监听截屏快捷键这事基本不靠谱，可以直接忽略。本文使用的测试手机，一加2（OnePlus2)。2.FileObserver添加权限：

2、ission.READ_EXTERNAL_STORAGE"/>代码示例：publicclassScreenshotActivityextendsAppCompatActivity{privatefinalStringTAG="Screenshot";privatestaticfinalStringPATH=Environment.getExternalStorageDirectory()+File.separator+Environment.DIRECTORY_PICTURES+File.separator+"Screenshots"+Fi

3、le.separator;protectedvoidonCreate(@NullableBundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_screenshot);mFileObserver=newCustomFileObserver(PATH);}@OverrideprotectedvoidonResume(){super.onResume();mFileObserver.startWatching();

4、Log.d(TAG,PATH);}@OverrideprotectedvoidonStop(){super.onStop();mFileObserver.stopWatching();}/***目录监听器*/privateclassCustomFileObserverextendsFileObserver{privateStringmPath;publicCustomFileObserver(Stringpath){super(path);this.mPath=path;}publicCustomFileObserver(Stringpat

5、h,intmask){super(path,mask);this.mPath=path;}@OverridepublicvoidonEvent(intevent,Stringpath){Log.d(TAG,path+""+event);//监听到事件，做一些过滤去重处理操作}}}打印的日志：一加2D/Screenshot:Screenshot_2016-12-16-17-49-18.png256D/Screenshot:Screenshot_2016-12-16-17-49-18.png32D/Screenshot:Screenshot_2

6、016-12-16-17-49-18.png2D/Screenshot:Screenshot_2016-12-16-17-49-18.png2D/Screenshot:Screenshot_2016-12-16-17-49-18.png2D/Screenshot:Screenshot_2016-12-16-17-49-18.png2D/Screenshot:Screenshot_2016-12-16-17-49-18.png2D/Screenshot:Screenshot_2016-12-16-17-49-18.png2D/Screensh

7、ot:Screenshot_2016-12-16-17-49-18.png2D/Screenshot:Screenshot_2016-12-16-17-49-18.png2D/Screenshot:Screenshot_2016-12-16-17-49-18.png2D/Screenshot:Screenshot_2016-12-16-17-49-18.png2D/Screenshot:Screenshot_2016-12-16-17-49-18.png2D/Screenshot:Screenshot_2016-12-16-17-49-18

8、.png2D/Screenshot:Screenshot_2016-12-16-17-49-18.png2D/Screenshot:Screenshot_2016-12-16-1