AppCompatPreferenceActivity.java

/*
 * Copyright 2015 Hippo Seven
 *
 * 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.hippo.nimingban.ui;

import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.support.annotation.CallSuper;
import android.support.annotation.LayoutRes;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.NavUtils;
import android.support.v4.app.TaskStackBuilder;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatCallback;
import android.support.v7.app.AppCompatDelegate;
import android.support.v7.view.ActionMode;
import android.support.v7.widget.Toolbar;
import android.view.MenuInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * A {@link android.preference.PreferenceActivity} which implements and proxies the necessary calls
 * to be used with AppCompat.
 *
 * This technique can be used with an {@link android.app.Activity} class, not just
 * {@link android.preference.PreferenceActivity}.
 */
public abstract class AppCompatPreferenceActivity extends PreferenceActivity
        implements AppCompatCallback, TaskStackBuilder.SupportParentable,
        ActionBarDrawerToggle.DelegateProvider {

    private AppCompatDelegate mDelegate;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        getDelegate().installViewFactory();
        getDelegate().onCreate(savedInstanceState);
        super.onCreate(savedInstanceState);
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        getDelegate().onPostCreate(savedInstanceState);
    }

    public ActionBar getSupportActionBar() {
        return getDelegate().getSupportActionBar();
    }

    public void setSupportActionBar(@Nullable Toolbar toolbar) {
        getDelegate().setSupportActionBar(toolbar);
    }

    @NonNull
    @Override
    public MenuInflater getMenuInflater() {
        return getDelegate().getMenuInflater();
    }

    @Override
    public void setContentView(@LayoutRes int layoutResID) {
        getDelegate().setContentView(layoutResID);
    }

    @Override
    public void setContentView(View view) {
        getDelegate().setContentView(view);
    }

    @Override
    public void setContentView(View view, ViewGroup.LayoutParams params) {
        getDelegate().setContentView(view, params);
    }

    @Override
    public void addContentView(View view, ViewGroup.LayoutParams params) {
        getDelegate().addContentView(view, params);
    }

    @Override
    protected void onPostResume() {
        super.onPostResume();
        getDelegate().onPostResume();
    }

    @Override
    protected void onTitleChanged(CharSequence title, int color) {
        super.onTitleChanged(title, color);
        getDelegate().setTitle(title);
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        getDelegate().onConfigurationChanged(newConfig);
    }

    @Override
    protected void onStop() {
        super.onStop();
        getDelegate().onStop();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        getDelegate().onDestroy();
    }

    @Override
    public void invalidateOptionsMenu() {
        getDelegate().invalidateOptionsMenu();
    }

    private AppCompatDelegate getDelegate() {
        if (mDelegate == null) {
            mDelegate = AppCompatDelegate.create(this, null);
        }
        return mDelegate;
    }

    @Nullable
    @Override
    public ActionBarDrawerToggle.Delegate getDrawerToggleDelegate() {
        return getDelegate().getDrawerToggleDelegate();
    }

    /**
     * Notifies the Activity that a support action mode has been started.
     * Activity subclasses overriding this method should call the superclass implementation.
     *
     * @param mode The new action mode.
     */
    @Override
    @CallSuper
    public void onSupportActionModeStarted(ActionMode mode) {
    }

    /**
     * Notifies the activity that a support action mode has finished.
     * Activity subclasses overriding this method should call the superclass implementation.
     *
     * @param mode The action mode that just finished.
     */
    @Override
    @CallSuper
    public void onSupportActionModeFinished(ActionMode mode) {
    }

    /**
     * Called when a support action mode is being started for this window. Gives the
     * callback an opportunity to handle the action mode in its own unique and
     * beautiful way. If this method returns null the system can choose a way
     * to present the mode or choose not to start the mode at all.
     *
     * @param callback Callback to control the lifecycle of this action mode
     * @return The ActionMode that was started, or null if the system should present it
     */
    @Nullable
    @Override
    public ActionMode onWindowStartingSupportActionMode(ActionMode.Callback callback) {
        return null;
    }

    /**
     * Obtain an {@link android.content.Intent} that will launch an explicit target activity
     * specified by sourceActivity's {@link android.support.v4.app.NavUtils#PARENT_ACTIVITY} <meta-data>
     * element in the application's manifest. If the device is running
     * Jellybean or newer, the android:parentActivityName attribute will be preferred
     * if it is present.
     *
     * @return a new Intent targeting the defined parent activity of sourceActivity
     */
    @Override
    @Nullable
    public Intent getSupportParentActivityIntent() {
        return NavUtils.getParentActivityIntent(this);
    }
}