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SystemUiHiderBase.java

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * 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.example.android.visualgamecontroller.util;

import android.app.Activity;
import android.view.View;
import android.view.WindowManager;

/**
 * A base implementation of {@link SystemUiHider}. Uses APIs available in all
 * API levels to show and hide the status bar.
 */
public class SystemUiHiderBase extends SystemUiHider {
    /**
     * Whether or not the system UI is currently visible. This is a cached value
     * from calls to {@link #hide()} and {@link #show()}.
     */
    private boolean mVisible = true;

/**
     * Constructor not intended to be called by clients. Use
     * {@link SystemUiHider#getInstance} to obtain an instance.
     */
    protected SystemUiHiderBase(Activity activity, View anchorView, int flags) {
        super(activity, anchorView, flags);
    }

@Override
    public void setup() {
        if ((mFlags & FLAG_LAYOUT_IN_SCREEN_OLDER_DEVICES) == 0) {
            mActivity.getWindow().setFlags(
                    WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
                            | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
                    WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
                            | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
        }
    }

@Override
    public boolean isVisible() {
        return mVisible;
    }

@Override
    public void hide() {
        if ((mFlags & FLAG_FULLSCREEN) != 0) {
            mActivity.getWindow().setFlags(
                    WindowManager.LayoutParams.FLAG_FULLSCREEN,
                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
        }
        mOnVisibilityChangeListener.onVisibilityChange(false);
        mVisible = false;
    }

@Override
    public void show() {
        if ((mFlags & FLAG_FULLSCREEN) != 0) {
            mActivity.getWindow().setFlags(
                    0,
                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
        }
        mOnVisibilityChangeListener.onVisibilityChange(true);
        mVisible = true;
    }
}