实现应用中全屏切换功能

2017-08-23  本文已影响0人  颜崔

公司新立了个浏览器项目,所有界面和功能基本上时仿UC做的,我负责的工具箱模块中有全屏功能,实现实时切换全屏状态不难,难的是如何实现所有界面统一切换全屏功能,忽然想起前几天研究换肤功能时看到过的项目,项目中实现日间/夜间模式切换功能所用的逻辑正式我需要的,没错,在借鉴(Copy)代码后完美实现了自己项目的全屏切换功能,特此记录分享。

1.新建ScreenStateChangeObserver接口,即全屏状态改变观察者接口

/**
 * ====================================
 * 作    者:Ares(颜崔)
 * 地    址:https://github.com/Ares-yc
 * 描    述:屏幕状态改变观察者接口
 * 版    本:1.0.0
 * 创建时间:2017/8/23/023.
 * 修改时间:2017/8/23/023.
 * ====================================
 */

public interface ScreenStateChangeObserver {

    /**
     * 加载当前屏幕状态(全屏或者非全屏)
     * */
    void loadingCurrentScreenState();

    /**
     * 更新屏幕状态(全屏或者非全屏)
     * */
    void notifyByScreenStateChanged();
}

2.创建自定义的BrowserApplication,以便于全局管理,记得要改清单文件哦!

/**
 * ====================================
 * 作    者:Ares(颜崔)
 * 地    址:https://github.com/Ares-yc
 * 描    述:
 * 版    本:1.0.0
 * 创建时间:2017/8/17/017.
 * 修改时间:2017/8/17/017.
 * ====================================
 */

public class BrowserApplication extends Application {

    private static Context mContext;
    /**  屏幕全屏切换监听栈 */
    private static List<ScreenStateChangeObserver> mScreenStateChangeObserverStack;

    @Override
    public void onCreate() {
        super.onCreate();
        mContext = this.getApplicationContext();
    }

    public static Context getContext(){
        return mContext;
    }

    /**
     * 获得observer堆栈
     * */
    private static List<ScreenStateChangeObserver> obtainScreenStateChangeObserverStack() {
        if (mScreenStateChangeObserverStack == null) mScreenStateChangeObserverStack = new ArrayList<>();
        return mScreenStateChangeObserverStack;
    }

    /**
     * 向堆栈中添加observer
     * */
    public static void registerObserver(ScreenStateChangeObserver observer) {
        if (observer == null || obtainScreenStateChangeObserverStack().contains(observer)) return ;
        obtainScreenStateChangeObserverStack().add(observer);
    }

    /**
     * 从堆栈中移除observer
     * */
    public static void unregisterObserver(ScreenStateChangeObserver observer) {
        if (observer == null || !(obtainScreenStateChangeObserverStack().contains(observer))) return ;
        obtainScreenStateChangeObserverStack().remove(observer);
    }

    /**
     * 向堆栈中所有对象发送更新屏幕切换全屏的指令
     * */
    public static void notifyByThemeChanged() {
        List<ScreenStateChangeObserver> observers = obtainScreenStateChangeObserverStack();
        for (ScreenStateChangeObserver observer : observers) {
            observer.notifyByScreenStateChanged(); //通知栈内所有实现类更新全屏状态
        }
        boolean isFulllScreen = SPUtil.getInstance(mContext).getBoolean(Constant.IS_FULL_SCREEN,false);
        SPUtil.getInstance(mContext).putBoolean(Constant.IS_FULL_SCREEN,!isFulllScreen);
    }
}

3.创建基类BaseActivity,实现ScreenStateChangeObserver接口,任何想要实现全屏切换的Activity只需继承BaseActivity即可

/**
 * ====================================
 * 作    者:Ares(颜崔)
 * 地    址:https://github.com/Ares-yc
 * 描    述:Activity的抽象基类
 * 版    本:a1.0.0
 * 创建时间:2017/8/14/014.
 * 修改时间:2017/8/14/014.
 * ====================================
 */

public abstract class BaseActivity extends AppCompatActivity implements ScreenStateChangeObserver{

    //可在子类中直接使用,例如:在MainActivity中可替代MainActivity.this使用
    protected Context mContext;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(setLayoutId());
        BrowserApplication.registerObserver(this);
        loadingCurrentScreenState();
        ButterKnife.bind(this);
        this.mContext = this;
        initView();
        initData();
    }

    //通过继承关系,获取子类设置的布局Id
    protected abstract int setLayoutId();

    //初始化必要的控件
    protected abstract void initView();

    //初始化数据
    protected abstract void initData();

    //加载当前屏幕状态(全屏或者非全屏)
    @Override
    public void loadingCurrentScreenState() {
        SetBoxUtil.loadingCurrentScreenState(this);
    }

    //更新屏幕状态(全屏或者非全屏)
    @Override
    public void notifyByScreenStateChanged() {
        SetBoxUtil.notifyByScreenStateChanged(this);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        BrowserApplication.unregisterObserver(this);
    }
}

4.附上SetBoxUtil代码

/**
 * ====================================
 * 作    者:Ares(颜崔)
 * 地    址:https://github.com/Ares-yc
 * 描    述:工具箱方法方法实现类
 * 版    本:1.0.0
 * 创建时间:2017/8/23/023.
 * 修改时间:2017/8/23/023.
 * ====================================
 */

public class SetBoxUtil {

    //加载当前全屏状态
    public static void loadingCurrentScreenState(Activity mContext){
        boolean isFulllScreen = SPUtil.getInstance(mContext).getBoolean(Constant.IS_FULL_SCREEN,false);
        if (isFulllScreen) {
            WindowManager.LayoutParams params = mContext.getWindow().getAttributes();
            params.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
            mContext.getWindow().setAttributes(params);
        } else {
            WindowManager.LayoutParams params = mContext.getWindow().getAttributes();
            params.flags &= (~WindowManager.LayoutParams.FLAG_FULLSCREEN);
            mContext.getWindow().setAttributes(params);
        }
    }

    //更新全屏状态
    public static void notifyByScreenStateChanged(Activity mContext){
        boolean isFulllScreen = SPUtil.getInstance(mContext).getBoolean(Constant.IS_FULL_SCREEN,false);
        if (!isFulllScreen) {
            WindowManager.LayoutParams params = mContext.getWindow().getAttributes();
            params.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
            mContext.getWindow().setAttributes(params);
        } else {
            WindowManager.LayoutParams params = mContext.getWindow().getAttributes();
            params.flags &= (~WindowManager.LayoutParams.FLAG_FULLSCREEN);
            mContext.getWindow().setAttributes(params);
        }
    }
}

5.需要切换全屏状态时,只需调用BrowserApplication.notifyByThemeChanged()即可!感谢GitHub上的前辈WuLiFei,该功能实现主要借鉴(Copy)WuLiFeiDayNightModeSwitch项目,大家有时间的话可以去瞧瞧,很优雅的实现日间/夜间模式切换功能哦!

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