常用的android访问路径
//Environment.getDataDirectory()--->/data
//Environment.getDownloadCacheDirectory()--->/cache
//Environment.getExternalStorageDirectory()--->/storage/emulated/0
// Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC)--->/storage/emulated/0/Music
//Environment.getRootDirectory()--->/system
//getApplication().getExternalCacheDir()--->/storage/emulated/0/Android/data/com.zopodo.terminal/cache
//getApplication().getExternalFilesDir(android.os.Environment.DIRECTORY_MUSIC)--->/storage/emulated/0/Android/data/com.zopodo.terminal/files/Music
//getApplication().getCacheDir()--->/data/data/com.zopodo.terminal/cache
//getApplication().getFilesDir()--->/data/data/com.zopodo.terminal/files
//下面这个方法受限于api 24
//Log.d("Q_M", " getApplication().getDataDir()--->" + getApplication().getDataDir());
//getApplication().getFileStreamPath("yourfile")--->/data/data/com.zopodo.terminal/files/yourfile
//getApplication().getObbDir()--->/storage/emulated/0/Android/obb/com.zopodo.terminal
//getApplicationInfo().dataDir--->/data/data/co.zopodo.terminal
//getApplicationInfo().publicSourceDir--->/data/app/com.zopodo.terminal/base.apk
//getApplicationInfo().sourceDir--->/data/app/me.febsky.debug-1/base.apk
///data/data/me.febsky.debug/app_yourfile 执行这行代码会 创建名为app_yourfile 的文件夹
Log.d("Q_M", "getBaseContext().getDir--->" + getBaseContext().getDir("yourfile", MODE_PRIVATE));
//下面省略和getApplication 中相同的方法,Application也是间接继承自Context类