Java tutorial
/* Copyright (C) 2016-2017 Andreas Shimokawa, Carsten Pfeiffer, Daniele Gobbetti This file is part of Gadgetbridge. Gadgetbridge is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Gadgetbridge is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ package nodomain.freeyourgadget.gadgetbridge.activities; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.IntentFilter; import android.content.SharedPreferences; import android.database.sqlite.SQLiteOpenHelper; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.app.NavUtils; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.File; import java.io.IOException; import nodomain.freeyourgadget.gadgetbridge.GBApplication; import nodomain.freeyourgadget.gadgetbridge.R; import nodomain.freeyourgadget.gadgetbridge.database.DBHandler; import nodomain.freeyourgadget.gadgetbridge.database.DBHelper; import nodomain.freeyourgadget.gadgetbridge.util.FileUtils; import nodomain.freeyourgadget.gadgetbridge.util.GB; import nodomain.freeyourgadget.gadgetbridge.util.ImportExportSharedPreferences; public class DbManagementActivity extends GBActivity { private static final Logger LOG = LoggerFactory.getLogger(DbManagementActivity.class); private static SharedPreferences sharedPrefs; private ImportExportSharedPreferences shared_file = new ImportExportSharedPreferences(); private Button exportDBButton; private Button importDBButton; private Button deleteOldActivityDBButton; private Button deleteDBButton; private TextView dbPath; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_db_management); IntentFilter filter = new IntentFilter(); filter.addAction(GBApplication.ACTION_QUIT); dbPath = (TextView) findViewById(R.id.activity_db_management_path); dbPath.setText(getExternalPath()); exportDBButton = (Button) findViewById(R.id.exportDBButton); exportDBButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { exportDB(); } }); importDBButton = (Button) findViewById(R.id.importDBButton); importDBButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { importDB(); } }); int oldDBVisibility = hasOldActivityDatabase() ? View.VISIBLE : View.GONE; deleteOldActivityDBButton = (Button) findViewById(R.id.deleteOldActivityDB); deleteOldActivityDBButton.setVisibility(oldDBVisibility); deleteOldActivityDBButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { deleteOldActivityDbFile(); } }); deleteDBButton = (Button) findViewById(R.id.emptyDBButton); deleteDBButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { deleteActivityDatabase(); } }); sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this); } private boolean hasOldActivityDatabase() { return new DBHelper(this).existsDB("ActivityDatabase"); } private String getExternalPath() { try { return FileUtils.getExternalFilesDir().getAbsolutePath(); } catch (Exception ex) { LOG.warn("Unable to get external files dir", ex); } return getString(R.string.dbmanagementactivvity_cannot_access_export_path); } private void exportShared() { // BEGIN EXAMPLE File myPath = null; try { myPath = FileUtils.getExternalFilesDir(); File myFile = new File(myPath, "Export_preference"); shared_file.exportToFile(sharedPrefs, myFile, null); } catch (IOException ex) { GB.toast(this, getString(R.string.dbmanagementactivity_error_exporting_shared, ex.getMessage()), Toast.LENGTH_LONG, GB.ERROR, ex); } } private void importShared() { // BEGIN EXAMPLE File myPath = null; try { myPath = FileUtils.getExternalFilesDir(); File myFile = new File(myPath, "Export_preference"); shared_file.importFromFile(sharedPrefs, myFile); } catch (Exception ex) { GB.toast(DbManagementActivity.this, getString(R.string.dbmanagementactivity_error_importing_db, ex.getMessage()), Toast.LENGTH_LONG, GB.ERROR, ex); } } private void exportDB() { try (DBHandler dbHandler = GBApplication.acquireDB()) { exportShared(); DBHelper helper = new DBHelper(this); File dir = FileUtils.getExternalFilesDir(); File destFile = helper.exportDB(dbHandler, dir); GB.toast(this, getString(R.string.dbmanagementactivity_exported_to, destFile.getAbsolutePath()), Toast.LENGTH_LONG, GB.INFO); } catch (Exception ex) { GB.toast(this, getString(R.string.dbmanagementactivity_error_exporting_db, ex.getMessage()), Toast.LENGTH_LONG, GB.ERROR, ex); } } private void importDB() { new AlertDialog.Builder(this).setCancelable(true).setTitle(R.string.dbmanagementactivity_import_data_title) .setMessage(R.string.dbmanagementactivity_overwrite_database_confirmation) .setPositiveButton(R.string.dbmanagementactivity_overwrite, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { try (DBHandler dbHandler = GBApplication.acquireDB()) { importShared(); DBHelper helper = new DBHelper(DbManagementActivity.this); File dir = FileUtils.getExternalFilesDir(); SQLiteOpenHelper sqLiteOpenHelper = dbHandler.getHelper(); File sourceFile = new File(dir, sqLiteOpenHelper.getDatabaseName()); helper.importDB(dbHandler, sourceFile); helper.validateDB(sqLiteOpenHelper); GB.toast(DbManagementActivity.this, getString(R.string.dbmanagementactivity_import_successful), Toast.LENGTH_LONG, GB.INFO); } catch (Exception ex) { GB.toast(DbManagementActivity.this, getString(R.string.dbmanagementactivity_error_importing_db, ex.getMessage()), Toast.LENGTH_LONG, GB.ERROR, ex); } } }).setNegativeButton(R.string.Cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }).show(); } private void deleteActivityDatabase() { new AlertDialog.Builder(this).setCancelable(true) .setTitle(R.string.dbmanagementactivity_delete_activity_data_title) .setMessage(R.string.dbmanagementactivity_really_delete_entire_db) .setPositiveButton(R.string.Delete, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { if (GBApplication.deleteActivityDatabase(DbManagementActivity.this)) { GB.toast(DbManagementActivity.this, getString(R.string.dbmanagementactivity_database_successfully_deleted), Toast.LENGTH_SHORT, GB.INFO); } else { GB.toast(DbManagementActivity.this, getString(R.string.dbmanagementactivity_db_deletion_failed), Toast.LENGTH_SHORT, GB.INFO); } } }).setNegativeButton(R.string.Cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }).show(); } private void deleteOldActivityDbFile() { new AlertDialog.Builder(this).setCancelable(true); new AlertDialog.Builder(this).setTitle(R.string.dbmanagementactivity_delete_old_activity_db); new AlertDialog.Builder(this).setMessage(R.string.dbmanagementactivity_delete_old_activitydb_confirmation); new AlertDialog.Builder(this).setPositiveButton(R.string.Delete, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { if (GBApplication.deleteOldActivityDatabase(DbManagementActivity.this)) { GB.toast(DbManagementActivity.this, getString(R.string.dbmanagementactivity_old_activity_db_successfully_deleted), Toast.LENGTH_SHORT, GB.INFO); } else { GB.toast(DbManagementActivity.this, getString(R.string.dbmanagementactivity_old_activity_db_deletion_failed), Toast.LENGTH_SHORT, GB.INFO); } } }); new AlertDialog.Builder(this).setNegativeButton(R.string.Cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }); new AlertDialog.Builder(this).show(); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: NavUtils.navigateUpFromSameTask(this); return true; } return super.onOptionsItemSelected(item); } }