如何创建弯曲的对话框布局？

问题描述

我想为像这样的对话框创建弯曲的布局，我在个人博客上找到了用于设计的图像。

我在网上搜索，但一无所获，我想创建完全相同的布局。我知道如何用drawable创建圆形，我不知道如何创建这张卡中间的曲线。

提前谢谢

解决方法

我认为这更接近您想要的：

1-全文：How I drew custom shapes in bottom bar

2- XML ：

<androidx.coordinatorlayout.widget.CoordinatorLayout 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"
    android:layout_centerInParent="true"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:layout_gravity="center"
    android:background="#8F8F8F"
    tools:context=".MainActivity">

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_marginBottom="10dp"
        android:clickable="true"
        android:focusable="true"
        app:elevation="4dp"
        app:layout_anchor="@id/customBottomBar"
        app:layout_anchorGravity="fill_vertical|center_horizontal"
        app:rippleColor="#fff" />

    <app.example.CurvedView
        android:id="@+id/customBottomBar"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_margin="10dp"
        android:background="@drawable/rounded_background">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:gravity="center"
            android:text="Call With"
            android:textColor="#000"
            android:textSize="18sp" />
    </app.example.CurvedView>
</androidx.coordinatorlayout.widget.CoordinatorLayout>

3- JAVA ：

public class CurvedView extends RelativeLayout {
    private Path mPath;
    private Paint mPaint;

    // the coordinates of the first curve
    private Point mFirstCurveStartPoint = new Point();
    private Point mFirstCurveEndPoint = new Point();
    private Point mFirstCurveControlPoint1 = new Point();
    private Point mFirstCurveControlPoint2 = new Point();

    private Point mSecondCurveEndPoint = new Point();
    private Point mSecondCurveControlPoint1 = new Point();
    private Point mSecondCurveControlPoint2 = new Point();

    public CurvedView(Context context) {
        super(context);
        init();
    }

    public CurvedView(Context context,AttributeSet attrs) {
        super(context,attrs);
        init();
    }

    public CurvedView(Context context,AttributeSet attrs,int defStyleAttr) {
        super(context,attrs,defStyleAttr);
        init();
    }

    private void init() {
        mPath = new Path();
        mPaint = new Paint();
        mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
        mPaint.setColor(Color.WHITE);
        setBackgroundColor(Color.TRANSPARENT);
       // setBackgroundResource(R.drawable.rounded_background);
    }

    @Override
    protected void onLayout(boolean changed,int left,int top,int right,int bottom) {
        super.onLayout(changed,left,top,right,bottom);

    }

    @Override
    protected void onSizeChanged(int w,int h,int oldw,int oldh) {
        super.onSizeChanged(w,h,oldw,oldh);
        // get width and height of navigation bar
        // Navigation bar bounds (width & height)
        int mNavigationBarWidth = getWidth();
        int mNavigationBarHeight = getHeight();
        // the coordinates (x,y) of the start point before curve
        /**
         * the CURVE_CIRCLE_RADIUS represent the radius of the fab button
         */
        int CURVE_CIRCLE_RADIUS = 256 / 2;
        mFirstCurveStartPoint.set((mNavigationBarWidth / 2) - (CURVE_CIRCLE_RADIUS * 2) - (CURVE_CIRCLE_RADIUS / 3),0);
        // the coordinates (x,y) of the end point after curve
        mFirstCurveEndPoint.set(mNavigationBarWidth / 2,CURVE_CIRCLE_RADIUS + (CURVE_CIRCLE_RADIUS / 4));
        // same thing for the second curve
        Point mSecondCurveStartPoint = mFirstCurveEndPoint;
        mSecondCurveEndPoint.set((mNavigationBarWidth / 2) + (CURVE_CIRCLE_RADIUS * 2) + (CURVE_CIRCLE_RADIUS / 3),0);

        // the coordinates (x,y)  of the 1st control point on a cubic curve
        mFirstCurveControlPoint1.set(mFirstCurveStartPoint.x + CURVE_CIRCLE_RADIUS + (CURVE_CIRCLE_RADIUS / 4),mFirstCurveStartPoint.y);
        // the coordinates (x,y)  of the 2nd control point on a cubic curve
        mFirstCurveControlPoint2.set(mFirstCurveEndPoint.x - (CURVE_CIRCLE_RADIUS * 2) + CURVE_CIRCLE_RADIUS,mFirstCurveEndPoint.y);

        mSecondCurveControlPoint1.set(mSecondCurveStartPoint.x + (CURVE_CIRCLE_RADIUS * 2) - CURVE_CIRCLE_RADIUS,mSecondCurveStartPoint.y);
        mSecondCurveControlPoint2.set(mSecondCurveEndPoint.x - (CURVE_CIRCLE_RADIUS + (CURVE_CIRCLE_RADIUS / 4)),mSecondCurveEndPoint.y);

        mPath.reset();
        mPath.moveTo(0,0);
        mPath.lineTo(mFirstCurveStartPoint.x,mFirstCurveStartPoint.y);

        mPath.cubicTo(mFirstCurveControlPoint1.x,mFirstCurveControlPoint1.y,mFirstCurveControlPoint2.x,mFirstCurveControlPoint2.y,mFirstCurveEndPoint.x,mFirstCurveEndPoint.y);

        mPath.cubicTo(mSecondCurveControlPoint1.x,mSecondCurveControlPoint1.y,mSecondCurveControlPoint2.x,mSecondCurveControlPoint2.y,mSecondCurveEndPoint.x,mSecondCurveEndPoint.y);

        mPath.lineTo(mNavigationBarWidth,0);
        mPath.lineTo(mNavigationBarWidth,mNavigationBarHeight);
        mPath.lineTo(0,mNavigationBarHeight);
        mPath.close();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawPath(mPath,mPaint);
    }
}