如何在android的服务窗口中输入？

如何解决如何在android的服务窗口中输入？

我正在创建类似 Messenger 聊天头的东西。所以，我创建了一个保持浮动小部件的服务，当点击浮动小部件时，会弹出一个布局，里面有一个文本框。但是当我点击文本框时，键盘没有打开。下面是我的代码。

public class FloatingService extends Service {
    private WindowManager mWindowManager;
    private View mFloatingView;

    public FloatingService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        //Inflate the floating view layout we created
        mFloatingView = LayoutInflater.from(this).inflate(R.layout.floating_widget_screen,null);
        int LAYOUT_FLAG;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
        } else {
            LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_PHONE;
        }
        //Add the view to the window.
        final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.WRAP_CONTENT,WindowManager.LayoutParams.WRAP_CONTENT,LAYOUT_FLAG,WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,PixelFormat.TRANSLUCENT);

        //Specify the view position
        params.gravity = Gravity.TOP | Gravity.LEFT;        //Initially view will be added to top-left corner
        params.x = 0;
        params.y = 100;

        //Add the view to the window
        mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
        mWindowManager.addView(mFloatingView,params);

        //The root element of the collapsed view layout
        final View collapsedView = mFloatingView.findViewById(R.id.collapse_view);
        //The root element of the expanded view layout
        final View expandedView = mFloatingView.findViewById(R.id.expanded_container);
        

        //Set the close button
        ImageView closeButton = (ImageView) mFloatingView.findViewById(R.id.close_button);
        closeButton.setonClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                collapsedView.setVisibility(View.VISIBLE);
                expandedView.setVisibility(View.GONE);
            }
        });

        //Drag and move floating view using user's touch action.
        mFloatingView.findViewById(R.id.root_container).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:

                        //remember the initial position.
                        initialX = params.x;
                        initialY = params.y;

                        //get the touch location
                        initialTouchX = event.getRawX();
                        initialTouchY = event.getRawY();
                        return true;
                    case MotionEvent.ACTION_UP:
                        int Xdiff = (int) (event.getRawX() - initialTouchX);
                        int Ydiff = (int) (event.getRawY() - initialTouchY);

                        //So that is click event.
                        if (Xdiff < 10 && Ydiff < 10) {
                            if (isViewCollapsed()) {
                                //When user clicks on the image view of the collapsed layout,//visibility of the collapsed layout will be changed to "View.GONE"
                                //and expanded view will become visible.
                                collapsedView.setVisibility(View.VISIBLE);
                                expandedView.setVisibility(View.VISIBLE);

                            }
                        }
                        return true;
                    case MotionEvent.ACTION_MOVE:
                        //Calculate the X and Y coordinates of the view.
                        params.x = initialX + (int) (event.getRawX() - initialTouchX);
                        params.y = initialY + (int) (event.getRawY() - initialTouchY);


                        //Update the layout with new X & Y coordinate
                        mWindowManager.updateViewLayout(mFloatingView,params);
                        return true;
                }
                return false;
            }
        });
    }

    private boolean isViewCollapsed() {
        return mFloatingView == null || mFloatingView.findViewById(R.id.collapse_view).getVisibility() == View.VISIBLE;
    }


    @Override
    public void onDestroy() {
        super.onDestroy();
        if (mFloatingView != null) mWindowManager.removeView(mFloatingView);
    }
}

这是我用于布局的 XML 代码。

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!--Root container-->
    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/root_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:ignore="Uselessparent">

        <!--View while view is collapsed-->
        <RelativeLayout
            android:id="@+id/collapse_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/widget_background"
            android:orientation="vertical"
            android:visibility="visible"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent">

            <!--Icon of floating widget -->
            <ImageView
                android:id="@+id/collapsed_iv"
                android:layout_width="60dp"
                android:layout_height="60dp"
                android:layout_marginTop="8dp"
                android:src="@drawable/ic_launcher_foreground"
                tools:ignore="ContentDescription" />

            <!--Close button-->
        </RelativeLayout>

        <!--View while view is expanded-->
        <LinearLayout
            android:id="@+id/expanded_container"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginTop="72dp"
            android:background="@drawable/widget_background"
            android:orientation="horizontal"
            android:padding="8dp"
            android:visibility="visible"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent">

            <androidx.constraintlayout.widget.ConstraintLayout
                android:id="@+id/relativeLayout"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical">

                <ImageView
                    android:id="@+id/close_button"
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:layout_marginTop="8dp"
                    android:layout_marginEnd="8dp"
                    android:background="@color/purple_200"
                    android:clickable="true"
                    android:focusable="true"
                    android:foreground="@android:drawable/ic_delete"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />

                <EditText
                    android:id="@+id/editTextTextPersonName"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="8dp"
                    android:layout_marginTop="8dp"
                    android:layout_marginEnd="8dp"
                    android:ems="10"
                    android:hint="Type here"
                    android:inputType="text"
                    android:minems="10"
                    android:textColor="@color/black"
                    app:layout_constraintEnd_toStartOf="@+id/close_button"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />

                </androidx.constraintlayout.widget.ConstraintLayout>
        </LinearLayout>
    </androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>

如何让键盘工作，以便我可以输入？