File externalFile = getApplicationContext().getExternalFilesDir( null );///storage/emulated/0/Android/data/com.example.testnativecplusplus/files
File externalFile1 = getApplicationContext().getExternalFilesDir( null ).getParentFile();
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File externalFile = getApplicationContext().getExternalFilesDir( null );///storage/emulated/0/Android/data/com.example.testnativecplusplus/files
File externalFile1 = getApplicationContext().getExternalFilesDir( null ).getParentFile();
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