Java tutorial
/* * Copyright(c) 2017 lizhaotailang * * 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 io.github.marktony.espresso.ui; import android.content.Intent; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.support.v4.content.ContextCompat; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.transition.Explode; import android.view.MenuItem; import android.view.animation.AccelerateDecelerateInterpolator; import io.github.marktony.espresso.R; /** * Created by lizhaotailang on 2017/3/15. */ public class PrefsActivity extends AppCompatActivity { public static final String EXTRA_FLAG = "EXTRA_FLAG"; public static final int FLAG_SETTINGS = 0, FLAG_ABOUT = 1, FLAG_LICENSES = 2; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_prefs); // Set the navigation bar color if (PreferenceManager.getDefaultSharedPreferences(this).getBoolean("navigation_bar_tint", true)) { getWindow().setNavigationBarColor(ContextCompat.getColor(this, R.color.colorPrimaryDark)); } Explode explode = new Explode(); explode.setDuration(500); explode.setInterpolator(new AccelerateDecelerateInterpolator()); getWindow().setEnterTransition(explode); initViews(); Intent intent = getIntent(); Fragment fragment; if (intent.getIntExtra(EXTRA_FLAG, 0) == FLAG_SETTINGS) { setTitle(R.string.nav_settings); fragment = new SettingsFragment(); } else if (intent.getIntExtra(EXTRA_FLAG, 0) == FLAG_ABOUT) { setTitle(R.string.nav_about); fragment = new AboutFragment(); } else if (intent.getIntExtra(EXTRA_FLAG, 0) == FLAG_LICENSES) { setTitle(R.string.licenses); fragment = new LicensesFragment(); } else { throw new RuntimeException("Please set flag when launching PrefsActivity."); } getSupportFragmentManager().beginTransaction().replace(R.id.container, fragment).commit(); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) { onBackPressed(); } return true; } private void initViews() { setSupportActionBar((Toolbar) findViewById(R.id.toolbar)); getSupportActionBar().setDisplayHomeAsUpEnabled(true); } }