csdn:https://blog.csdn.net/panghaha12138/article/details/81479396

最近业务需求需要我们直播返回或者退出直播间时，开一个小窗口在全局继续直播视频，先看效果图。

webwxgetmsgimg (1).jpeg webwxgetmsgimg (2).jpeg webwxgetmsgimg (3).jpeg

调研了一下当下主流直播平台，斗鱼BiLiBiLi等app,都是用windowManger 做的(这个你可以在应用权限列表看看有没有悬浮窗权限，然后把斗鱼的权限禁止，这时候回到斗鱼直播间退出时候就会让你授权了)即通过windowManger add一个全局的view,可以申请权限悬浮在所有应用之上以此来实现全局悬浮窗

ok,分析完实现原理我们就开始撸代码了

实现悬浮窗难点

１：权限申请：一个是6.0及以后要用户手动授权，因为悬浮窗权限属于高危权限，二是因为MIUI,底层修改了权限，所以在小米手机上需要特殊处理，还有就是8.0以后权限的定义类型变了下面有代码会详解这块

２：对于悬浮窗touch 事件的监听，比如点击事件和touch事件，如果同事监听那么setOnclickListener就没有效果了，需要区别点击和touch,还有就是拖动小窗口移动位置，这里是指针对整个窗体即设置touch事件又设置点击事件会有冲突

３：直播组件的初始化，即全局单例的直播窗口，可以是自己封装一个自定义View,这个因各自的直播ＳＤＫ而定，我这用的sdk在插件里，所以实现起来比较麻烦，但是一般直播sdk(阿里云或者七牛)都可以用同一个直播组件对象，即在直播页面销毁或者返回时把对象传递到小窗口里，实现无缝衔接开启小窗口直播，不需要重新加载,这里用EventBus发个消息或者广播都可以实现

一：权限申请

首先要在清单文件即AndroidManifest文件声明　悬浮窗权限

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

然后我们悬浮窗触发的时机是在直播页面返回的时候，那也就是说可以在onDestory()或者finsh()时候去做权限申请

注：因为6.0以后是高危权限，所以代码是拿不到权限的，需要跳到权限申请列表让用户授权

      if (isLiveShow) {
                if (Build.VERSION.SDK_INT >= 23) {
                    if (!Settings.canDrawOverlays(getContext())) {
                        //没有悬浮窗权限,跳转申请
                        Toast.makeText(getApplicationContext(), "请开启悬浮窗权限", Toast.LENGTH_LONG).show();
                        Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION);
                        startActivity(intent);
                    } else {
                        initLiveWindow();
                    }
                } else {
                    //6.0以下　只有MUI会修改权限
                    if (MIUI.rom()) {
                        if (PermissionUtils.hasPermission(getContext())) {
                            initLiveWindow();
                        } else {
                            MIUI.req(getContext());
                        }
                    } else {
                        initLiveWindow();
                    }
                }
            }

而低版本一般是不需要用户授权的除了MIUI,所以我们需要先判断是否是MIUI系统，然后判断MIUI版本，然后不同的版本对应不同的权限申请姿势，如果你不这么做，那么恭喜你在低版本(低于6.0)的小米手机上不是返回跳转权限崩溃，因为底层改了授权列表类或者是根本不会跳授权没有反应，

  //6.0以下　只有MUI会修改权限
                    if (MIUI.rom()) {
                        if (PermissionUtils.hasPermission(getContext())) {
                            initLiveWindow();
                        } else {
                            MIUI.req(getContext());
                        }
                    } else {
                        initLiveWindow();
                    }

先判断是否是MIUI系统

  public static boolean rom() {     
   return Build.MANUFACTURER.equals("Xiaomi");    }

然后根据不同版本，不同的授权姿势

/**
 * Description:
 * Created by PangHaHa on 18-7-25.
 * Copyright (c) 2018 PangHaHa All rights reserved.
 *
 *  /**
 * <p>
 * 需要清楚：一个MIUI版本对应小米各种机型，基于不同的安卓版本，但是权限设置页跟MIUI版本有关
 * 测试TYPE_TOAST类型：
 * 7.0：
 * 小米      5        MIUI8         -------------------- 失败
 * 小米   Note2       MIUI9         -------------------- 失败
 * 6.0.1
 * 小米   5                         -------------------- 失败
 * 小米   红米note3                  -------------------- 失败
 * 6.0：
 * 小米   5                         -------------------- 成功
 * 小米   红米4A      MIUI8         -------------------- 成功
 * 小米   红米Pro     MIUI7         -------------------- 成功
 * 小米   红米Note4   MIUI8         -------------------- 失败
 * <p>
 * 经过各种横向纵向测试对比，得出一个结论，就是小米对TYPE_TOAST的处理机制毫无规律可言！
 * 跟Android版本无关，跟MIUI版本无关，addView方法也不报错
 * 所以最后对小米6.0以上的适配方法是：不使用 TYPE_TOAST 类型，统一申请权限
 */

public class MIUI {

    private static final String miui = "ro.miui.ui.version.name";
    private static final String miui5 = "V5";
    private static final String miui6 = "V6";
    private static final String miui7 = "V7";
    private static final String miui8 = "V8";
    private static final String miui9 = "V9";



    public static boolean rom() {
        return Build.MANUFACTURER.equals("Xiaomi");
    }

    private static String getProp() {
        return Rom.getProp(miui);
    }


    public static void req(final Context context) {
        switch (getProp()) {
            case miui5:
                reqForMiui5(context);
                break;
            case miui6:
            case miui7:
                reqForMiui67(context);
                break;
            case miui8:
            case miui9:
                reqForMiui89(context);
                break;
        }

    }


    private static void reqForMiui5(Context context) {
        String packageName = context.getPackageName();
        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
        Uri uri = Uri.fromParts("package", packageName, null);
        intent.setData(uri);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        if (isIntentAvailable(intent, context)) {
            context.startActivity(intent);
        }
    }

    private static void reqForMiui67(Context context) {
        Intent intent = new Intent("miui.intent.action.APP_PERM_EDITOR");
        intent.setClassName("com.miui.securitycenter",
                "com.miui.permcenter.permissions.AppPermissionsEditorActivity");
        intent.putExtra("extra_pkgname", context.getPackageName());
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        if (isIntentAvailable(intent, context)) {
            context.startActivity(intent);
        }
    }

    private static void reqForMiui89(Context context) {
        Intent intent = new Intent("miui.intent.action.APP_PERM_EDITOR");
        intent.setClassName("com.miui.securitycenter", "com.miui.permcenter.permissions.PermissionsEditorActivity");
        intent.putExtra("extra_pkgname", context.getPackageName());
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        if (isIntentAvailable(intent, context)) {
            context.startActivity(intent);
        } else {
            intent = new Intent("miui.intent.action.APP_PERM_EDITOR");
            intent.setPackage("com.miui.securitycenter");
            intent.putExtra("extra_pkgname", context.getPackageName());
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            if (isIntentAvailable(intent, context)) {
                context.startActivity(intent);
            }
        }
    }


    /**
     * 有些机型在添加TYPE-TOAST类型时会自动改为TYPE_SYSTEM_ALERT，通过此方法可以屏蔽修改
     * 但是...即使成功显示出悬浮窗，移动的话也会崩溃
     */
    private static void addViewToWindow(WindowManager wm, View view, WindowManager.LayoutParams params) {
        setMiUI_International(true);
        wm.addView(view, params);
        setMiUI_International(false);
    }


    private static void setMiUI_International(boolean flag) {
        try {
            Class BuildForMi = Class.forName("miui.os.Build");
            Field isInternational = BuildForMi.getDeclaredField("IS_INTERNATIONAL_BUILD");
            isInternational.setAccessible(true);
            isInternational.setBoolean(null, flag);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

以及利用Runtime　执行命令　getprop 来获取手机的版本型号，因为MIUI不同的版本对应的底层都不一样，毫无规律可言！

/**
 * Description: getprop 命令获取手机版本型号
 * Created by PangHaHa on 18-7-25.
 * Copyright (c) 2018 PangHaHa All rights reserved.
 */
public class Rom {

    static boolean isIntentAvailable(Intent intent, Context context) {
        return intent != null && context.getPackageManager().queryIntentActivities(
                intent, PackageManager.MATCH_DEFAULT_ONLY).size() > 0;
    }


    static String getProp(String name) {
        BufferedReader input = null;
        try {
            Process p = Runtime.getRuntime().exec("getprop " + name);
            input = new BufferedReader(new InputStreamReader(p.getInputStream()), 1024);
            String line = input.readLine();
            input.close();
            return line;
        } catch (IOException ex) {
            return null;
        } finally {
            if (input != null) {
                try {
                    input.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

权限申请的工具类

/**
 * Description:
 * Created by PangHaHa on 18-7-25.
 * Copyright (c) 2018 PangHaHa All rights reserved.
 */
public class PermissionUtils {

    public static boolean hasPermission(Context context) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            return Settings.canDrawOverlays(context);
        } else {
            return hasPermissionBelowMarshmallow(context);
        }
    }

    public static boolean hasPermissionOnActivityResult(Context context) {
        if (Build.VERSION.SDK_INT == Build.VERSION_CODES.O) {
            return hasPermissionForO(context);
        }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            return Settings.canDrawOverlays(context);
        } else {
            return hasPermissionBelowMarshmallow(context);
        }
    }

    /**
     * 6.0以下判断是否有权限
     * 理论上6.0以上才需处理权限，但有的国内rom在6.0以下就添加了权限
     * 其实此方式也可以用于判断6.0以上版本，只不过有更简单的canDrawOverlays代替
     */
    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    static boolean hasPermissionBelowMarshmallow(Context context) {
        try {
            AppOpsManager manager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
            Method dispatchMethod = AppOpsManager.class.getMethod("checkOp", int.class, int.class, String.class);
            //AppOpsManager.OP_SYSTEM_ALERT_WINDOW = 24
            return AppOpsManager.MODE_ALLOWED == (Integer) dispatchMethod.invoke(
                    manager, 24, Binder.getCallingUid(), context.getApplicationContext().getPackageName());
        } catch (Exception e) {
            return false;
        }
    }


    /**
     * 用于判断8.0时是否有权限，仅用于OnActivityResult
     * 针对8.0官方bug:在用户授予权限后Settings.canDrawOverlays或checkOp方法判断仍然返回false
     */
    @RequiresApi(api = Build.VERSION_CODES.M)
    private static boolean hasPermissionForO(Context context) {
        try {
            WindowManager mgr = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
            if (mgr == null) return false;
            View viewToAdd = new View(context);
            WindowManager.LayoutParams params = new WindowManager.LayoutParams(0, 0,
                    Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ?
                            WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY : WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
                    WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
                    PixelFormat.TRANSPARENT);
            viewToAdd.setLayoutParams(params);
            mgr.addView(viewToAdd, params);
            mgr.removeView(viewToAdd);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }

}

二：弹窗的初始化，以及touch事件的监听

首先我们需要明白一点 windowManger的源码，只有三个方法

package android.view;

/** Interface to let you add and remove child views to an Activity. To get an instance
  * of this class, call {@link android.content.Context#getSystemService(java.lang.String) Context.getSystemService()}.
  */
public interface ViewManager
{
    /**
     * Assign the passed LayoutParams to the passed View and add the view to the window.
     * <p>Throws {@link android.view.WindowManager.BadTokenException} for certain programming
     * errors, such as adding a second view to a window without removing the first view.
     * <p>Throws {@link android.view.WindowManager.InvalidDisplayException} if the window is on a
     * secondary {@link Display} and the specified display can't be found
     * (see {@link android.app.Presentation}).
     * @param view The view to be added to this window.
     * @param params The LayoutParams to assign to view.
     */
    public void addView(View view, ViewGroup.LayoutParams params);
    public void updateViewLayout(View view, ViewGroup.LayoutParams params);
    public void removeView(View view);
}

看名字就知道，增加，更新，删除

然后我们需要自定义一个View 通过addView　添加到windowManger 上，先上关键代码

 windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
            //赋值WindowManager&LayoutParam.
            params = new WindowManager.LayoutParams();
            //设置type.系统提示型窗口，一般都在应用程序窗口之上.
            if (Build.VERSION.SDK_INT >= 26) {//8.0新特性
                params.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
            } else {
                params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;
            }
            //设置效果为背景透明.
            params.format = PixelFormat.RGBA_8888;
            //设置flags.不可聚焦及不可使用按钮对悬浮窗进行操控.
            params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
            //设置窗口坐标参考系
            params.gravity = Gravity.LEFT | Gravity.TOP;
            //用于检测状态栏高度.
            int resourceId = context.getResources().getIdentifier("status_bar_height",
                    "dimen","android");
            if (resourceId > 0) {
                statusBarHeight = context.getResources().getDimensionPixelSize(resourceId);
            }
            offset = DimensionUtils.dp2px(context, 2);//移动偏移量
            //设置原点
            params.x = getScreenWidth(context) - DimensionUtils.dp2px(context, 170);
            params.y = getScreenHeight(context) - DimensionUtils.dp2px(context, 100+72) ;
            //设置悬浮窗口长宽数据.
            params.width = DimensionUtils.dp2px(context, 170);
            params.height = DimensionUtils.dp2px(context, 100);

            //获取浮动窗口视图所在布局.
            toucherLayout = new FrameLayout(context);

            mPlayer = new Player();
            gsVideoView = new GSVideoView(context);
/**
             * 设置视频View
             */
            mPlayer.setGSVideoView(gsVideoView);
            //加入直播房间
            mPlayer.join(context,mInitParam,playListener);

            toucherLayout.addView(gsVideoView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                    ViewGroup.LayoutParams.MATCH_PARENT));
 //添加toucherlayout
            if(isInit) {
                windowManager.addView(toucherLayout,params);
            } else {
                windowManager.updateViewLayout(toucherLayout,params);
            }

需要注意两点

一是　8.0以后权限定义变了　需要修改type

//设置type.系统提示型窗口，一般都在应用程序窗口之上.
            if (Build.VERSION.SDK_INT >= 26) {//8.0新特性
                params.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
            } else {
                params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;
            }

二是　参考系和初始坐标的概念，参考系Gravity 即以哪点为原点而不是初始化弹窗相对于屏幕的位置！

其中需要注意的是其Gravity属性: 
注意:Gravity不是说你添加到WindowManager中的View相对屏幕的几种放置,
而是说你可以设置你的 参 考 系 ! 
例如:mWinParams.gravity= Gravity.LEFT | Gravity.TOP;
意思是以屏幕左上角为参考系,那么屏幕左上角的坐标就是(0,0),
这是你后面摆放View位置的唯一依据.当你设置为mWinParams.gravity = Gravity.CENTER;
那么你的屏幕中心为参考系,坐标(0,0).一般我们用屏幕左上角为参考系.

三是　touch事件的处理,由于我们View先相应touch事件，之后才会传递到onClick点击事件，如果touch拦截了就不会传递到下一级了

１，我们通过手指移动后的位置，添加偏移量，然后windowManger　调用　updateViewlayout　更新界面　达到实时拖动更改位置

２，通过计算上一次触碰屏幕位置和这一次触碰屏幕的偏移量，ｘ轴和y轴的偏移量都小于2像素，认定为点击事件，执行整个窗体的点击事件，否则执行整个窗体的touch事件

 //主动计算出当前View的宽高信息.
            toucherLayout.measure(View.MeasureSpec.UNSPECIFIED,View.MeasureSpec.UNSPECIFIED);

            //处理touch
            toucherLayout.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View view, MotionEvent event) {

                    switch (event.getAction()) {
                        case MotionEvent.ACTION_DOWN:
                            isMoved = false;
                            // 记录按下位置
                            lastX = event.getRawX();
                            lastY = event.getRawY();

                            start_X = event.getRawX();
                            start_Y = event.getRawY();
                            break;
                        case MotionEvent.ACTION_MOVE:
                            isMoved = true;
                            // 记录移动后的位置
                            float moveX = event.getRawX();
                            float moveY = event.getRawY();
                            // 获取当前窗口的布局属性, 添加偏移量, 并更新界面, 实现移动
                            params.x += (int) (moveX - lastX);
                            params.y += (int) (moveY - lastY);
                            windowManager.updateViewLayout(toucherLayout,params);

                            lastX = moveX;
                            lastY = moveY;
                            break;
                        case MotionEvent.ACTION_UP:

                            float fmoveX = event.getRawX();
                            float fmoveY = event.getRawY();

                            if (Math.abs(fmoveX-start_X)<offset && Math.abs(fmoveY-start_Y)<offset){
                                isMoved = false;
                                remove(context);
                                leaveCast(context);
                                String PARAM_CIRCLE_ID = "param_circle_id";
                                Intent intent = new Intent();
                                intent.putExtra(PARAM_CIRCLE_ID,circle_id);
                                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                                intent.setComponent(new ComponentName(RePlugin.getHostContext().getPackageName(),
                                        "com.sina.licaishicircle.sections.circledetail.CircleActivity"));
                                context.startActivity(intent);
                            }else {
                                isMoved = true;
                            }
                            break;
                    }
                        // 如果是移动事件, 则消费掉; 如果不是, 则由其他处理, 比如点击
                    return isMoved;
                }

            });

这里是直播初始化完整代码

/**
 * Description:初始化直播弹窗工具
 * Created by PangHaHa on 18-7-18.
 * Copyright (c) 2018 PangHaHa All rights reserved.
 */
public class LiveUtils {

    private InitParam mInitParam;
    private GSVideoView gsVideoView;//播放器
    private String circle_id,media_host,media_code,img_url,video_code;
    private Player mPlayer;
    private OnPlayListener playListener;
    //布局参数.
    private WindowManager.LayoutParams params;
    //实例化的WindowManager.
    private WindowManager windowManager;
    private int statusBarHeight =-1;
    private FrameLayout toucherLayout;
    private ImageView imageViewClose;

    private int count = 0;//点击次数
    private long firstClick = 0;//第一次点击时间
    private long secondClick = 0;//第二次点击时间

    private float start_X = 0;
    private float start_Y = 0;


    // 记录上次移动的位置
    private float lastX = 0;
    private float lastY = 0;
    private int offset;
    // 是否是移动事件
    boolean isMoved = false;
    /**
     * 两次点击时间间隔，单位毫秒
     */
    private final int totalTime = 1000;

    private boolean isInit = true;


    public void initLive(final Context context, Map<String,String> map){
        try {
            circle_id = map.get("circle_id");
            media_host = map.get("media_host");
            media_code = map.get("media_code");
            img_url = map.get("img_url");
            video_code = map.get("video_code");

            windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
            //赋值WindowManager&LayoutParam.
            params = new WindowManager.LayoutParams();
            //设置type.系统提示型窗口，一般都在应用程序窗口之上.
            if (Build.VERSION.SDK_INT >= 26) {//8.0新特性
                params.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
            } else {
                params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;
            }
            //设置效果为背景透明.
            params.format = PixelFormat.RGBA_8888;
            //设置flags.不可聚焦及不可使用按钮对悬浮窗进行操控.
            params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
            //设置窗口坐标参考系
            params.gravity = Gravity.LEFT | Gravity.TOP;
            //用于检测状态栏高度.
            int resourceId = context.getResources().getIdentifier("status_bar_height",
                    "dimen","android");
            if (resourceId > 0) {
                statusBarHeight = context.getResources().getDimensionPixelSize(resourceId);
            }
            offset = DimensionUtils.dp2px(context, 2);//移动偏移量
            //设置原点
            params.x = getScreenWidth(context) - DimensionUtils.dp2px(context, 170);
            params.y = getScreenHeight(context) - DimensionUtils.dp2px(context, 100+72) ;
            //设置悬浮窗口长宽数据.
            params.width = DimensionUtils.dp2px(context, 170);
            params.height = DimensionUtils.dp2px(context, 100);

            //获取浮动窗口视图所在布局.
            toucherLayout = new FrameLayout(context);

            mPlayer = new Player();
            gsVideoView = new GSVideoView(context);
            playListener = new OnPlayListener() {
                @Override
                public void onJoin(int i) {

                }

                @Override
                public void onUserJoin(UserInfo userInfo) {

                }

                @Override
                public void onUserLeave(UserInfo userInfo) {

                }

                @Override
                public void onUserUpdate(UserInfo userInfo) {

                }

                @Override
                public void onRosterTotal(int i) {

                }

                @Override
                public void onReconnecting() {

                }

                @Override
                public void onLeave(int i) {

                }

                @Override
                public void onCaching(boolean b) {

                }

                @Override
                public void onErr(int i) {

                }

                @Override
                public void onDocSwitch(int i, String s) {

                }

                @Override
                public void onVideoBegin() {

                }

                @Override
                public void onVideoEnd() {

                }

                @Override
                public void onVideoSize(int i, int i1, boolean b) {

                }

                @Override
                public void onAudioLevel(int i) {

                }

                @Override
                public void onPublish(boolean b) {

                }

                @Override
                public void onSubject(String s) {

                }

                @Override
                public void onPageSize(int i, int i1, int i2) {

                }

                @Override
                public void onVideoDataNotify() {

                }

                @Override
                public void onPublicMsg(long l, String s) {

                }

                @Override
                public void onLiveText(String s, String s1) {

                }

                @Override
                public void onRollcall(int i) {

                }

                @Override
                public void onLottery(int i, String s) {

                }

                @Override
                public void onFileShare(int i, String s, String s1) {

                }

                @Override
                public void onFileShareDl(int i, String s, String s1) {

                }

                @Override
                public void onInvite(int i, boolean b) {

                }

                @Override
                public void onMicNotify(int i) {

                }

                @Override
                public void onCameraNotify(int i) {

                }

                @Override
                public void onScreenStatus(boolean b) {

                }

                @Override
                public void onModuleFocus(int i) {

                }

                @Override
                public void onIdcList(List<PingEntity> list) {

                }

                @Override
                public void onThirdVote(String s) {

                }

                @Override
                public void onRewordEnable(boolean b, boolean b1) {

                }

                @Override
                public void onRedBagTip(RewardResult rewardResult) {

                }

                @Override
                public void onGotoPay(PayInfo payInfo) {

                }

                @Override
                public void onGetUserInfo(UserInfo[] userInfos) {

                }

                @Override
                public void onLiveInfo(LiveInfo liveInfo) {

                }
            };

            mInitParam = new InitParam();
            //站点域名 如：demo.gensee.com 必需
            mInitParam.setDomain(media_host);
            //直播id或点播id
            mInitParam.setLiveId(media_code);
            //昵称，必需
            mInitParam.setNickName("新浪理财师");
            //如果后台设置了密码(口令)，必须传入正确的密码
            mInitParam.setJoinPwd(video_code);
            //必须选择一种 serviceType
            // 站点类型ServiceType.ST_CASTLINE 直播webcast，
            // ServiceType.ST_TRAINING 培训 training
            mInitParam.setServiceType(ServiceType.WEBCAST);
            /**
             * 设置视频View
             */
            mPlayer.setGSVideoView(gsVideoView);
            //加入直播房间
            mPlayer.join(context,mInitParam,playListener);

            toucherLayout.addView(gsVideoView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                    ViewGroup.LayoutParams.MATCH_PARENT));

            imageViewClose = new ImageView(context);
            imageViewClose.setImageDrawable(RePlugin.getPluginContext().getResources().getDrawable(R.drawable.course_icon_remove));
            FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(DimensionUtils.
                    dp2px(context, 16), DimensionUtils.dp2px(context, 16));
            layoutParams.gravity = Gravity.TOP | Gravity.RIGHT;
            layoutParams.rightMargin = DimensionUtils.dp2px(context, 3);
            layoutParams.topMargin = DimensionUtils.dp2px(context, 3);
            imageViewClose.setLayoutParams(layoutParams);

            toucherLayout.addView(imageViewClose,layoutParams);


            //添加toucherlayout
            if(isInit) {
                windowManager.addView(toucherLayout,params);
            } else {
                windowManager.updateViewLayout(toucherLayout,params);
            }

            //主动计算出当前View的宽高信息.
            toucherLayout.measure(View.MeasureSpec.UNSPECIFIED,View.MeasureSpec.UNSPECIFIED);

            //处理touch
            toucherLayout.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View view, MotionEvent event) {

                    switch (event.getAction()) {
                        case MotionEvent.ACTION_DOWN:
                            isMoved = false;
                            // 记录按下位置
                            lastX = event.getRawX();
                            lastY = event.getRawY();

                            start_X = event.getRawX();
                            start_Y = event.getRawY();
                            break;
                        case MotionEvent.ACTION_MOVE:
                            isMoved = true;
                            // 记录移动后的位置
                            float moveX = event.getRawX();
                            float moveY = event.getRawY();
                            // 获取当前窗口的布局属性, 添加偏移量, 并更新界面, 实现移动
                            params.x += (int) (moveX - lastX);
                            params.y += (int) (moveY - lastY);
                            windowManager.updateViewLayout(toucherLayout,params);

                            lastX = moveX;
                            lastY = moveY;
                            break;
                        case MotionEvent.ACTION_UP:

                            float fmoveX = event.getRawX();
                            float fmoveY = event.getRawY();

                            if (Math.abs(fmoveX-start_X)<offset && Math.abs(fmoveY-start_Y)<offset){
                                isMoved = false;
                                remove(context);
                                leaveCast(context);
                                String PARAM_CIRCLE_ID = "param_circle_id";
                                Intent intent = new Intent();
                                intent.putExtra(PARAM_CIRCLE_ID,circle_id);
                                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                                intent.setComponent(new ComponentName(RePlugin.getHostContext().getPackageName(),
                                        "com.sina.licaishicircle.sections.circledetail.CircleActivity"));
                                context.startActivity(intent);
                            }else {
                                isMoved = true;
                            }
                            break;
                    }
                        // 如果是移动事件, 则消费掉; 如果不是, 则由其他处理, 比如点击
                    return isMoved;
                }

            });

            //删除
            imageViewClose.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    remove(context);
                    leaveCast(context);
                }
            });
        }catch (Exception e){
            e.printStackTrace();
        }

        isInit = false;
    }

    public void remove(Context context) {
        if(windowManager != null && toucherLayout != null) {
            windowManager.removeView(toucherLayout);
        }
    }

    /**
     * 获取屏幕宽度(px)
     */
    public int getScreenWidth(Context context) {
        return context.getResources().getDisplayMetrics().widthPixels;
    }
    /**
     * 获取屏幕高度(px)
     */
    public int getScreenHeight(Context context){
        return context.getResources().getDisplayMetrics().heightPixels;
    }

    /**
     * 退出的时候请调用
     */
    public void leaveCast(Context context) {
        if (null != mPlayer&& null!=context) {
            mPlayer.leave();
            mPlayer.release(context);
            //直播资源销毁需要重新初始化
            isInit = true;
        }
    }

}

三：全局单例直播以及直播窗口的构造复用

因为项目用了360的Replugin 插件化管理方式，而且直播组件都是在插件中，需要反射获取直播弹窗工具类

/**
 * Description:
 * Created by PangHaHa on 18-7-23.
 * Copyright (c) 2018 PangHaHa All rights reserved.
 */
public class LiveWindowUtil {

    private static class Hold {
        public static LiveWindowUtil instance = new LiveWindowUtil();
    }

    public static LiveWindowUtil getInstance() {
        return Hold.instance;
    }

    public LiveWindowUtil() {
        //代码使用插件Fragment
        RePlugin.fetchContext("sina.com.cn.courseplugin");
    }

    private Object o;
    private Class clazz;
    public void init(Context context, Map map) {
        try {
            ClassLoader classLoader = RePlugin.fetchClassLoader("sina.com.cn.courseplugin");//获取插件的ClassLoader
            clazz = classLoader.loadClass("sina.com.cn.courseplugin.tools.LiveUtils");
            o = clazz.newInstance();
            Method method = clazz.getMethod("initLive", Context.class, Map.class);
            method.invoke(o, context, map);

        }catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }catch (NullPointerException e){
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        }
    }

    public void remove(Context context) {
        Method method = null;
        try {
            if(clazz != null && o != null) {
                method = clazz.getMethod("remove", Context.class);
                method.invoke(o,context);
            }
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }

    }
}

总结一下，主要还是需要拿到权限，然后传递直播组件复用到小窗口，监听悬浮窗的touch事件，权限的坑比较大一点除了MIUI可能别的品牌手机也会有低于6.0莫名其妙拿不到权限