In my android app, I am using transition scenes. On the Emulator, it works fine but on a physical device the more times a transition happens, the time between the transition grows, slowing down the app. I need to clear the device cache memory to stop this from happening.
I tried a code to clear the cache memory, but the android studio gives out a warning that the delete code will be ignored. I have not found any other way to do this.
public void clearCache() {
Log.i(TAG, "Clearing Cache.");
File[] dir = mContext.getCacheDir().listFiles();
if(dir != null){
for (File f : dir){
f.delete();
}
}
}
The delete() method call is ignored by the system so the code doesn't work. I need to clear the device cache can someone help.
android studio gives out a warning that the delete code will be ignored
that's wrong, it does not give such warning.
It says that the result of f.delete()
is ignored.
f.delete()
returns true
/ false
as the result, which means
true
if file has been deleted false
if file deletion failed. You may ignore this warning, if you don't care about the delete()
result, or check it like
for (File f : dir){
if(!f.delete()) {
//deletion failed. Do something about it
}
}
If you just want the warning to disappear, you can do something like
for (File f : dir){
boolean ignored = f.delete();
}
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