Java tutorial
/* * Copyright 2014 Uwe Trottmann * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.battlelancer.seriesguide.dataliberation; import android.content.Context; import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.app.Fragment; import android.text.format.DateUtils; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.ProgressBar; import android.widget.TextView; import com.battlelancer.seriesguide.R; import com.battlelancer.seriesguide.interfaces.OnTaskFinishedListener; import com.battlelancer.seriesguide.interfaces.OnTaskProgressListener; import com.battlelancer.seriesguide.provider.SeriesGuideDatabase; import com.battlelancer.seriesguide.settings.AdvancedSettings; import com.battlelancer.seriesguide.util.Utils; import com.uwetrottmann.androidutils.AndroidUtils; /** * One button export or import of the show database using a JSON file on * external storage. */ public class DataLiberationFragment extends Fragment implements OnTaskFinishedListener, OnTaskProgressListener { private Button mButtonExport; private Button mButtonImport; private Button mButtonImportAutoBackup; private ProgressBar mProgressBar; private CheckBox mCheckBoxFullDump; private CheckBox mCheckBoxImportWarning; private AsyncTask<Void, Integer, Integer> mTask; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); /* * Try to keep the fragment around on config changes so the backup task * does not have to be finished. */ setRetainInstance(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.fragment_data_liberation, container, false); mProgressBar = (ProgressBar) v.findViewById(R.id.progressBarDataLiberation); mProgressBar.setVisibility(View.GONE); mButtonExport = (Button) v.findViewById(R.id.buttonExport); mButtonImport = (Button) v.findViewById(R.id.buttonImport); mButtonImportAutoBackup = (Button) v.findViewById(R.id.buttonBackupRestoreAutoBackup); mCheckBoxFullDump = (CheckBox) v.findViewById(R.id.checkBoxFullDump); mCheckBoxImportWarning = (CheckBox) v.findViewById(R.id.checkBoxImportWarning); // display backup path TextView backuppath = (TextView) v.findViewById(R.id.textViewBackupPath); String path = JsonExportTask.getExportPath(false).toString(); backuppath.setText(getString(R.string.backup_path) + ": " + path); // display current db version TextView dbVersion = (TextView) v.findViewById(R.id.textViewBackupDatabaseVersion); dbVersion.setText(getString(R.string.backup_version) + ": " + SeriesGuideDatabase.DATABASE_VERSION); // display last auto-backup date TextView lastAutoBackup = (TextView) v.findViewById(R.id.textViewBackupLastAutoBackup); long lastAutoBackupTime = AdvancedSettings.getLastAutoBackupTime(getActivity()); lastAutoBackup.setText(getString(R.string.last_auto_backup, DataLiberationTools.isAutoBackupAvailable() ? DateUtils.getRelativeDateTimeString(getActivity(), lastAutoBackupTime, DateUtils.SECOND_IN_MILLIS, DateUtils.DAY_IN_MILLIS, 0) : "n/a")); return v; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); final Context context = getActivity().getApplicationContext(); mButtonExport.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { setProgressLock(true); mTask = new JsonExportTask(context, DataLiberationFragment.this, DataLiberationFragment.this, mCheckBoxFullDump.isChecked(), false); AndroidUtils.executeOnPool(mTask); } }); mCheckBoxImportWarning.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { mButtonImport.setEnabled(isChecked); mButtonImportAutoBackup.setEnabled(isChecked); } }); mButtonImport.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { setProgressLock(true); mTask = new JsonImportTask(context, DataLiberationFragment.this, false); Utils.executeInOrder(mTask); } }); mButtonImportAutoBackup.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { setProgressLock(true); mTask = new JsonImportTask(context, DataLiberationFragment.this, true); Utils.executeInOrder(mTask); } }); // restore UI state if (mTask != null && mTask.getStatus() != AsyncTask.Status.FINISHED) { setProgressLock(true); } } @Override public void onDestroy() { if (mTask != null && mTask.getStatus() != AsyncTask.Status.FINISHED) { mTask.cancel(true); } mTask = null; super.onDestroy(); } @Override public void onProgressUpdate(Integer... values) { if (mProgressBar == null) { return; } mProgressBar.setIndeterminate(values[0].equals(values[1])); mProgressBar.setMax(values[0]); mProgressBar.setProgress(values[1]); } @Override public void onTaskFinished() { setProgressLock(false); } private void setProgressLock(boolean isLocked) { if (isLocked) { mButtonImport.setEnabled(false); mButtonImportAutoBackup.setEnabled(false); } else { mButtonImport.setEnabled(mCheckBoxImportWarning.isChecked()); mButtonImportAutoBackup.setEnabled(mCheckBoxImportWarning.isChecked()); } mButtonExport.setEnabled(!isLocked); mProgressBar.setVisibility(isLocked ? View.VISIBLE : View.GONE); mCheckBoxFullDump.setEnabled(!isLocked); mCheckBoxImportWarning.setEnabled(!isLocked); } }