com.andryr.guitartuner.SettingsActivity.java Source code

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Here is the source code for com.andryr.guitartuner.SettingsActivity.java

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/*
 * Copyright 2016 andryr
 *
 * 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.andryr.guitartuner;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.Preference;
import android.support.v4.app.NavUtils;
import android.support.v7.app.ActionBar;
import android.view.MenuItem;

public class SettingsActivity extends AppCompatPreferenceActivity {

    private boolean mShouldRestart = false;

    private SharedPreferences.OnSharedPreferenceChangeListener mOnPreferenceChangeListener = new SharedPreferences.OnSharedPreferenceChangeListener() {
        @Override
        public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
            if (key.equals(getString(R.string.pref_tuning_key))
                    || key.equals(getString(R.string.pref_dark_theme_key))) {
                mShouldRestart = true;
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setupActionBar();
        addPreferencesFromResource(R.xml.preferences);
        getPreferenceScreen().getSharedPreferences()
                .registerOnSharedPreferenceChangeListener(mOnPreferenceChangeListener);
    }

    @Override
    protected void onPause() {
        super.onPause();
        getPreferenceScreen().getSharedPreferences()
                .unregisterOnSharedPreferenceChangeListener(mOnPreferenceChangeListener);
    }

    private void setupActionBar() {
        ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            // Show the Up button in the action bar.
            actionBar.setDisplayHomeAsUpEnabled(true);
        }
    }

    @Override
    public boolean onMenuItemSelected(int featureId, MenuItem item) {
        int id = item.getItemId();
        if (id == android.R.id.home) {
            if (!super.onMenuItemSelected(featureId, item)) {
                NavUtils.navigateUpFromSameTask(this);
            }
            return true;
        }
        return super.onMenuItemSelected(featureId, item);
    }

    @Override
    public void onBackPressed() {
        if (mShouldRestart) {
            Intent i = getPackageManager().getLaunchIntentForPackage(getPackageName());
            i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            startActivity(i);
        } else {
            super.onBackPressed();
        }
    }
}