CheckStorageAndroid

public class MainActivity extends AppCompatActivity {

    public static final String TAG = "Main_Activity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Log.d(TAG, "onCreate: " + getAvailableSpaceInKB());
        Log.d(TAG, "onCreate: " + getAvailableSpaceInMB());
        Log.d(TAG, "onCreate: " + getAvailableSpaceInGB());
    }

    /**
     * @return Number of kilo bytes available on External storage
     */
    public static long getAvailableSpaceInKB() {
        final long SIZE_KB = 1024L;
        long availableSpace;
        StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath());
        availableSpace = (long) stat.getAvailableBlocks() * (long) stat.getBlockSize();
        return availableSpace / SIZE_KB;
    }

    /**
     * @return Number of Mega bytes available on External storage
     */
    public static long getAvailableSpaceInMB() {
        final long SIZE_KB = 1024L;
        final long SIZE_MB = SIZE_KB * SIZE_KB;
        long availableSpace;
        StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath());
        availableSpace = (long) stat.getAvailableBlocks() * (long) stat.getBlockSize();
        return availableSpace / SIZE_MB;
    }

    /**
     * @return Number of gega bytes available on External storage
     */
    public static long getAvailableSpaceInGB() {
        final long SIZE_KB = 1024L;
        final long SIZE_GB = SIZE_KB * SIZE_KB * SIZE_KB;
        long availableSpace;
        StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath());
        availableSpace = (long) stat.getAvailableBlocks() * (long) stat.getBlockSize();
        return availableSpace / SIZE_GB;
    }
}

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Copyright 2021 M. Fadli Zein