Android 是否将文件从 SD 卡缓存到内部 memory？

Question

Have a situation.

1. MediaPlayer plays some file, in the end of the file it starts play next one.

2. All files stored on SD card(not emulated, but physical)

3. Android KitKat 4.4.4(if it's important)

So, when first file is done playing and second starts to play, I'm checking if previous file still exists(no matter why, it's just workaround some problem). And If I've to remove USB physically, than do File.exist it returns true but file is already not there. So it must be false.

So question is. Does Android cache SD card files(recently read) to internal memory(some cache)? And if yes, how do I clear this cache, or remove something from it?

PS Yes, File.exist checking goes after USB remove, in 2-3 seconds after.

Answer 1

No, Android doesn't cache files by default on internal memory.

You may have initialized your file before removing file so it return true on following code.

• What you need to do is run this code when you need at runtime . Hope it will fix your issue here.

File file = new File(filePath);

if(file.exists())      
//Do something
else
// Do something else.```