Android debug utilities to export SQLite, Realm, SharedPreferences and Logcat to external files directory.

DebugUtils.java

public class DebugUtils {
    private static final String TAG = LogUtils.makeLogTag("DebugUtils");

    private DebugUtils() {
    }

    /**
     * Export SQLite DB to external files directory.
     *
     * @param context The context to use.
     * @param name    SQLite DB name.
     */
    public static void exportSQLite(Context context, String name) {
        LogUtils.LOGD(TAG, "exportSQLite");
        try {
            File srcDB = context.getDatabasePath(name);
            File destDB = new File(context.getExternalFilesDir(null), name);
            copyFileUsingFileChannels(srcDB, destDB);
            if (destDB.exists()) {
                scanFile(context, destDB);
                Toast.makeText(context, "SQLite Exported!", Toast.LENGTH_SHORT).show();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * Export Realm DB to external files directory.
     *
     * @param context The context to use.
     * @param name    Realm DB name, or null for default Realm DB.
     */
    public static void exportRealm(Context context, String name) {
        LogUtils.LOGD(TAG, "exportRealm");
        try {
            if (name == null) {
                name = "default.realm";
            }
            File srcDB = new File(context.getFilesDir(), name);
            File destDB = new File(context.getExternalFilesDir(null), name);
            copyFileUsingFileChannels(srcDB, destDB);
            if (destDB.exists()) {
                scanFile(context, destDB);
                Toast.makeText(context, "Realm Exported!", Toast.LENGTH_SHORT).show();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * Export SharedPreferences to external files directory.
     *
     * @param context The context to use.
     * @param name    SharedPreferences name (without .xml), or null for default SharedPreferences.
     */
    public static void exportSharedPreferences(Context context, String name) {
        LogUtils.LOGD(TAG, "exportSharedPreferences");
        try {
            if (name == null) {
                name = context.getPackageName() + "_preferences.xml";
            } else {
                name += ".xml";
            }
            File srcSP = new File(ContextCompat.getDataDir(context) + "/shared_prefs", name);
            File destSP = new File(context.getExternalFilesDir(null), name);
            copyFileUsingFileChannels(srcSP, destSP);
            if (destSP.exists()) {
                scanFile(context, destSP);
                Toast.makeText(context, "SharedPreferences Exported!", Toast.LENGTH_SHORT).show();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * Export log to external files directory.
     *
     * @param context The context to use.
     * @param name    Output log name.
     */
    public static void exportLogcat(Context context, String name) {
        LogUtils.LOGD(TAG, "exportLogcat");
        try {
            File destLOG = new File(context.getExternalFilesDir(null), name);
            destLOG.createNewFile();
            // http://developer.android.com/tools/help/logcat.html
            String cmd = "logcat -d -f " + destLOG.getAbsolutePath();
            Runtime.getRuntime().exec(cmd);
            if (destLOG.exists()) {
                scanFile(context, destLOG);
                Toast.makeText(context, "Logcat Exported!", Toast.LENGTH_SHORT).show();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static void copyFileUsingFileChannels(File source, File dest) throws IOException {
        FileChannel inputChannel = null;
        FileChannel outputChannel = null;

        try {
            inputChannel = new FileInputStream(source).getChannel();
            outputChannel = new FileOutputStream(dest).getChannel();
            outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
        } finally {
            if (inputChannel != null) {
                inputChannel.close();
            }
            if (outputChannel != null) {
                outputChannel.close();
            }
        }
    }

    private static void scanFile(Context context, File file) {
        Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
        intent.setData(Uri.fromFile(file));
        context.sendBroadcast(intent);
    }
}