Android layout 移动WindowManager中的ImageView不会'；我不能正常工作

我正试图在屏幕上的所有东西（最上面）上画一个图标，类似于新的Facebook messenger的聊天头

我已经创建了一个在后台工作的服务，根据特定条件，我的图标应该出现在屏幕上（就像有人在facebook上向你发送消息时，messenger服务将挂起消息并在屏幕上显示聊天头，通知你新消息）

我所做的：

我已经创建了该服务，并授予它显示系统警报窗口的权限（因为头部实际上是一个系统警报窗口）

我从ImageView继承了一个类（StickyHeadView），并使用以下方式实现了OnTouchListener侦听器：

class StickyHeadView : ImageView, Android.Views.View.IOnTouchListener
{
    private StickyHeadService OwnerService;

    public StickyHeadView(StickyHeadService ContextService, Context context)
        : base(context)
    {
        OwnerService = ContextService;
        SetOnTouchListener(this);
    }

    float TouchMoveX;
    float TouchMoveY;

    public bool OnTouch(View v, MotionEvent e)
    {
        var windowService = OwnerService.GetSystemService(Android.Content.Context.WindowService);
        var windowManager = windowService.JavaCast<Android.Views.IWindowManager>();

        switch (e.Action & e.ActionMasked)
        {
            case MotionEventActions.Move:
                TouchMoveX = (int)e.GetX();
                TouchMoveY = (int)e.GetY();
                OwnerService.LOParams.X = (int)(TouchMoveX);
                OwnerService.LOParams.Y = (int)(TouchMoveY);
                windowManager.UpdateViewLayout(this, OwnerService.LOParams);                    
                Log.Debug("Point : ", "X: " + Convert.ToString(OwnerService.LOParams.X) + " Y: " + Convert.ToString(OwnerService.LOParams.Y));
                return true;                    
            case MotionEventActions.Down:
                return true;                    
            case MotionEventActions.Up:
                return true;
        }
        return false;
    }
}    

class StickyHeadView:ImageView，Android.Views.View.IOnTouchListener
{
私人粘性服务所有者服务；
公共StickyHeadView（StickyHeadService上下文服务，上下文上下文）
：基本（上下文）
{
OwnerService=ContextService；
SetOnTouchListener（这个）；
}
float-TouchMoveX；
浮动触摸移动；
公共bool OnTouch（视图v，运动事件e）
{
var windowService=OwnerService.GetSystemService（Android.Content.Context.windowService）；
var windowManager=windowService.JavaCast（）；
开关（e.Action和e.ActionMasked）
{
case MotionEventActions。移动：
TouchMoveX=（int）e.GetX（）；
TouchMoveY=（int）e.GetY（）；
OwnerService.LOParams.X=（int）（TouchMoveX）；
OwnerService.LOParams.Y=（int）（TouchMoveY）；
windowManager.UpdateViewLayout（这是OwnerService.LOParams）；
Log.Debug（“点：”，“X:“+Convert.ToString（OwnerService.LOParams.X）+“Y:+Convert.ToString（OwnerService.LOParams.Y））；
返回true；
案例MotionEventActions.Down：
返回true；
case MotionEventActions.Up：
返回true；
}
返回false；
}
}    

该服务具有wiindow manager以在其上显示图标…在服务“OnStart”事件中，我初始化头部：

        private StickyHeadView MyHead;
        public Android.Views.WindowManagerLayoutParams LOParams;
        public override void OnStart(Android.Content.Intent intent, int startId)
        {
            base.OnStart(intent, startId);

            var windowService = this.GetSystemService(Android.Content.Context.WindowService);
            var windowManager = windowService.JavaCast<Android.Views.IWindowManager>();

            MyHead = new StickyHeadView(this, this);
            MyHead.SetImageResource(Resource.Drawable.Icon);
            LOParams = new Android.Views.WindowManagerLayoutParams(Android.Views.WindowManagerLayoutParams.WrapContent,
                                Android.Views.WindowManagerLayoutParams.WrapContent,
                                Android.Views.WindowManagerTypes.Phone,
                                Android.Views.WindowManagerFlags.NotFocusable,
                                Android.Graphics.Format.Translucent);

            LOParams.Gravity = GravityFlags.Top | GravityFlags.Left;
            LOParams.X = 10;
            LOParams.Y = 10;
            windowManager.AddView(MyHead, LOParams);
        } 

private StickyHeadView MyHead；
public Android.Views.WindowManagerLayoutParams LOParams；
public override void OnStart（Android.Content.Intent Intent，int startId）
{
base.OnStart（intent，startId）；
var windowService=this.GetSystemService（Android.Content.Context.windowService）；
var windowManager=windowService.JavaCast（）；
MyHead=新的StickyHeadView（这个，这个）；
SetImageResource（Resource.Drawable.Icon）；
LOParams=新的Android.Views.WindowManagerLayoutParams（Android.Views.WindowManagerLayoutParams.WrapContent，
Android.Views.WindowManagerLayoutParams.WrapContent，
Android.Views.WindowManagerTypes.Phone，
Android.Views.WindowManagerFlags.NotFocusable，
Android.Graphics.Format.transparent）；
LOParams.Gravity=GravityFlags.Top | GravityFlags.Left；
LOParams.X=10；
LOParams.Y=10；
windowManager.AddView（MyHead，LOParams）；
} 

如您所见，我声明了一个WindowManager，并使用特殊参数将视图（MyHead）添加到其中

我的问题：

当我试图移动视图（我的头）时，它不会以稳定的方式移动，并且会持续发生地震

我正在真正的HTC手机上使用安卓4.0.4进行测试

我用的是单机器人

请帮助…如果触摸的实现不正确，请建议更好的方法…谢谢。

您使用的e.GetX（）/eGetY（）是相对于视图位置的，因此当您使用UpdateView布局移动视图时，下一个值将相对于移动。它使用GetRawX（）/GetRawY（）工作，但是您还必须跟踪初始的Down rawX和rawY

以下是我的JAVA代码：

@Override
public boolean onTouch(View v, MotionEvent event) {
    switch (event.getAction()) {
        case MotionEvent.ACTION_MOVE:
            layoutParams.x = Math.round(event.getRawX() - downX);
            layoutParams.y = Math.round(event.getRawY() - downY);
            windowManager.updateViewLayout(floatingView, layoutParams);
            return true;                    
        case MotionEvent.ACTION_DOWN:
            downX = event.getRawX() - layoutParams.x;
            downY = event.getRawY() - layoutParams.y;
            return true;                    
        case MotionEvent.ACTION_UP:
            return true;
    }
    return false;
}

---

一句话，使用windowManager有一个很大的缺点。updateViewLayout（…）此方法每次移动都只会在浮动视图上调用Layout，这可能是一个性能问题，无论如何，到目前为止，我还没有找到另一种方法来移动浮动视图。

试试这可能会有帮助

首先在活动中添加全局变量：

    WindowManager wm;
    LinearLayout lay;
    float downX,downY;

在输入代码后，在活动中重新创建

    Button btnstart=(Button)findViewById(R.id.button1);
    Button btnstop=(Button)findViewById(R.id.button2);

    btnstart.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            if(lay==null)
            {
                wm = (WindowManager) getApplicationContext().getSystemService(
                        Context.WINDOW_SERVICE);
                final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                        LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT,
                        WindowManager.LayoutParams.TYPE_SYSTEM_ALERT
                                | WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
                        WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                                | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
                        PixelFormat.TRANSLUCENT);
                params.x = (int) wm.getDefaultDisplay().getWidth();
                params.y = 0;
                // params.height = wm.getDefaultDisplay().getHeight()/2;
                params.width = LayoutParams.WRAP_CONTENT;
                params.format = PixelFormat.TRANSLUCENT;

                params.gravity = Gravity.TOP | Gravity.LEFT;
                params.setTitle("Info");

                lay = null;

                lay = new LinearLayout(getApplicationContext());
                lay.setOrientation(LinearLayout.VERTICAL);
                // lay.setAlpha(0.5f);

                TextView txt_no = new TextView(getApplicationContext());
                txt_no.setTextSize(10.0f);
                txt_no.setText("Moving view by stack user!");

                txt_no.setTextColor(Color.BLACK);
                // txt_no.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
                // LayoutParams.WRAP_CONTENT));

                LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
                        LinearLayout.LayoutParams.WRAP_CONTENT,
                        LinearLayout.LayoutParams.WRAP_CONTENT);
                layoutParams.setMargins(0, 0, 0, 0); // margins as you wish

                txt_no.setGravity(Gravity.RIGHT);
                txt_no.setBackgroundColor(Color.WHITE);
                txt_no.setLayoutParams(layoutParams);
                txt_no.setPadding(10, 10, 10, 10);

                lay.addView(txt_no);

                AlphaAnimation alpha = new AlphaAnimation(0.5F, 0.5F);
                alpha.setDuration(0); // Make animation instant
                alpha.setFillAfter(true); // Tell it to persist after the animation ends
                // And then on your layout
                wm.addView(lay, params);
                txt_no.startAnimation(alpha);

                downX=params.x;
                downY=params.y;

                Log.v("MSES>", "x="+ downX +",y="+ downY);

                lay.setOnTouchListener(new OnTouchListener() {

                    @Override
                    public boolean onTouch(View v, MotionEvent event) {
                        // TODO Auto-generated method stub

                        switch (event.getAction()) {
                        case MotionEvent.ACTION_MOVE:

                            params.x = Math.round(event.getRawX() - downX);
                            params.y = Math.round(event.getRawY() - downY);
                            wm.updateViewLayout(lay, params);
                            Log.v("MSES EVENT>", "x="+ event.getRawX() +",y="+ event.getRawY());
                            Log.v("MSES MOVE>", "x="+ params.x +",y="+ params.y);
                            return true;                    
                        case MotionEvent.ACTION_DOWN:
                            downX = event.getRawX() - params.x;
                            downY = event.getRawY() - params.y;
                            Log.v("MSES DOWN>", "x="+ params.x +",y="+ params.y);
                           return true;                    
                        case MotionEvent.ACTION_UP:
                            //params.x = Math.round(event.getRawX() - downX);
                            //params.y = Math.round(event.getRawY() - downY);
                            //wm.updateViewLayout(lay, params);
                            return true;                   

                        }
                        return false;
                    }
                });
            }

        }
    });

    btnstop.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            if (lay != null) {
                lay.removeAllViews();
                wm.removeViewImmediate(lay);
                lay = null;
            }
        }
    });

---

在您的代码中只需使用

TYPE_SYSTEM_ALERT

或

而不是

TYPE_SYSTEM_OVERLAY

希望这对你有帮助

一个有效的例子：

@Override
public void onCreate() {
    super.onCreate();

    windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);

    chatHead = new ImageView(this);
    chatHead.setImageResource(R.drawable.ic_launcher);

    final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
        WindowManager.LayoutParams.WRAP_CONTENT,
        WindowManager.LayoutParams.WRAP_CONTENT,
        WindowManager.LayoutParams.TYPE_SYSTEM_ALERT, //TYPE_PHONE
        WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
        PixelFormat.TRANSLUCENT);

    params.gravity = Gravity.TOP | Gravity.LEFT;
    params.x = 0;
    params.y = 100;

    windowManager.addView(chatHead, params);

    chatHead.setOnTouchListener(new View.OnTouchListener() {
          private int initialX;
          private int initialY;
          private float initialTouchX;
          private float initialTouchY;

          @Override public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
              case MotionEvent.ACTION_DOWN:
                initialX = params.x;
                initialY = params.y;
                initialTouchX = event.getRawX();
                initialTouchY = event.getRawY();
                return true;
              case MotionEvent.ACTION_UP:
                return true;
              case MotionEvent.ACTION_MOVE:
                params.x = initialX + (int) (event.getRawX() - initialTouchX);
                params.y = initialY + (int) (event.getRawY() - initialTouchY);
                windowManager.updateViewLayout(chatHead, params);
                return true;
            }
            return false;
          }
        });
}

---

为什么没有人回答！我想这是一个提问的论坛！！！！那是java吗？你用什么编译器？

TYPE_SYSTEM_OVERLAY

@Override
public void onCreate() {
    super.onCreate();

    windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);

    chatHead = new ImageView(this);
    chatHead.setImageResource(R.drawable.ic_launcher);

    final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
        WindowManager.LayoutParams.WRAP_CONTENT,
        WindowManager.LayoutParams.WRAP_CONTENT,
        WindowManager.LayoutParams.TYPE_SYSTEM_ALERT, //TYPE_PHONE
        WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
        PixelFormat.TRANSLUCENT);

    params.gravity = Gravity.TOP | Gravity.LEFT;
    params.x = 0;
    params.y = 100;

    windowManager.addView(chatHead, params);

    chatHead.setOnTouchListener(new View.OnTouchListener() {
          private int initialX;
          private int initialY;
          private float initialTouchX;
          private float initialTouchY;

          @Override public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
              case MotionEvent.ACTION_DOWN:
                initialX = params.x;
                initialY = params.y;
                initialTouchX = event.getRawX();
                initialTouchY = event.getRawY();
                return true;
              case MotionEvent.ACTION_UP:
                return true;
              case MotionEvent.ACTION_MOVE:
                params.x = initialX + (int) (event.getRawX() - initialTouchX);
                params.y = initialY + (int) (event.getRawY() - initialTouchY);
                windowManager.updateViewLayout(chatHead, params);
                return true;
            }
            return false;
          }
        });
}