android路径获取

//内部路径
 
Environment.getDataDirectory()=/data
 
Environment.getDownloadCacheDirectory()=/cache
 
Environment.getRootDirectory()=/system
 
context.getCacheDir()=/data/data/com.penngo.test/cache
 
context.getFilesDir()=/data/data/com.penngo.test/files
 
 
// 存储卡路径
 
Environment.getExternalStorageDirectory()=/storage/sdcard0
 
 
// 可选值DIRECTORY_MUSIC, DIRECTORY_PODCASTS, DIRECTORY_RINGTONES, 
 
// DIRECTORY_ALARMS, DIRECTORY_NOTIFICATIONS, DIRECTORY_PICTURES, 
 
// DIRECTORY_MOVIES, DIRECTORY_DOWNLOADS, or DIRECTORY_DCIM. 不能为null
 
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC)=/storage/sdcard0/Music
 
 
// 与context.getFilesDir(相似，删除应用时会同时删除
 
context.getExternalFilesDir()=/storage/sdcard0/Android/data/com.penngo.test/files
 
// 与context.getCacheDir()相似，删除应用时会同时删除
 
context.getExternalCacheDir()=/storage/sdcard0/Android/data/com.penngo.test/cache
 
 
System.getProperty("user.home")=
 
System.getProperty("java.io.tmpdir")=/data/data/com.penngo.test/cache
 
new File().getAbsolutePath()=/.
 
 
 
//判断存储卡是否存在
 
public static boolean isSdCardExist() {
 
  if (Environment.getExternalStorageState().equals(
 
    Environment.MEDIA_MOUNTED)) {//判断是否已经挂载
 
   return true;
 
  }
 
  return false;
 
 }