布局圆角设置_constraintlayout 圆角

布局圆角设置

Glide加载

依赖使用：

implementation 'com.github.bumptech.glide:glide:4.9.0'
implementation 'com.github.bumptech.glide:annotations:4.9.0'
implementation 'com.github.bumptech.glide:okhttp3-integration:4.9.0'
implementation 'jp.wasabeef:glide-transformations:4.0.1'
annotationProcessor 'com.github.bumptech.glide:compiler:4.9.0'
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通过Gilde设置图片的圆角：

转换类GlideRoundTransform：

package com.ford.hmi.appstore.utils;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.text.TextUtils;

import androidx.annotation.NonNull;

import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;
import com.bumptech.glide.load.resource.bitmap.CenterCrop;
import com.bumptech.glide.load.resource.bitmap.TransformationUtils;

import java.security.MessageDigest;

public class GlideRoundTransform extends CenterCrop {

    private static float mRadius = 0f;
    public static final int DEFAULT_RADIUS = 4;

    public GlideRoundTransform(Context context) {
        this(context, DEFAULT_RADIUS);
    }

    public GlideRoundTransform(Context context, int radius) {
        mRadius = radius;
    }

    @Override
    protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
        Bitmap transform = super.transform(pool, toTransform, outWidth, outHeight);
        return roundCrop(pool, transform);
    }

    private static Bitmap roundCrop(BitmapPool pool, Bitmap source) {
        if (source == null) {
            return null;
        }

        Bitmap result = pool.get(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);
        if (result == null) {
            result = Bitmap.createBitmap(source.getWidth(),
                source.getHeight(), Bitmap.Config.ARGB_8888);
        }

        Canvas canvas = new Canvas(result);
        Paint paint = new Paint();
        paint.setShader(new BitmapShader(source,
            BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
        paint.setAntiAlias(true);

        //Draw rounded corners
        RectF rectF = new RectF(0f, 0f, source.getWidth(), source.getHeight());
        canvas.drawRoundRect(rectF, mRadius, mRadius, paint);

        return result;
    }

    @Override
    public void updateDiskCacheKey(@NonNull MessageDigest messageDigest) {

    }


}
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使用：

			 GlideRoundTransform roundTransform =
            		new GlideRoundTransform(requireContext(), AppStoreCommon.GLIDE_IMAGE_RADIUS);
             Glide.with(requireContext())
                    .load(firstCardInfo.getCoverPic())
                    .error(R.drawable.applet_first)
                    .transform(roundTransform)
                    .into(mDataBinding.appletFirstBg);
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缺点使用过程中失效的问题，解决办法：通过降低Glide的版本为3.XXX即可。

自定义布局

使用圆角布局

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.RectF;
import android.os.Build;
import android.util.AttributeSet;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.constraintlayout.widget.ConstraintLayout;

import com.ford.hmi.appstore.R;

public class RoundConstraintLayout extends ConstraintLayout {
    private Path mPath;
    private Paint mPaint;
    private RectF mRectF;
    private float mRadius;
    private boolean isClipBackground;
    public static final int CURRENT_SDK = 28;

    public RoundConstraintLayout(@NonNull Context context) {
        this(context, null);
    }

    public RoundConstraintLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    /**
     * RoundConstraintLayout.
     */
    public RoundConstraintLayout(@NonNull Context context,
                                 @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.RoundConstraintLayout);
        mRadius = ta.getDimension(R.styleable.RoundConstraintLayout_rcRadius, 0);
        isClipBackground = ta.getBoolean(R.styleable.RoundConstraintLayout_rcClipBackground, true);
        ta.recycle();

        mPath = new Path();
        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mRectF = new RectF();

        mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
    }

    public void setRadius(float radius) {
        mRadius = radius;
        postInvalidate();
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        mRectF.set(0, 0, w, h);
    }

    @SuppressLint("MissingSuperCall")
    @Override
    public void draw(Canvas canvas) {
        if (Build.VERSION.SDK_INT >= CURRENT_SDK) {
            draw28(canvas);
        } else {
            draw27(canvas);
        }
    }

    @Override
    protected void dispatchDraw(Canvas canvas) {
        if (Build.VERSION.SDK_INT >= CURRENT_SDK) {
            dispatchDraw28(canvas);
        } else {
            dispatchDraw27(canvas);
        }
    }

    private void draw27(Canvas canvas) {
        if (isClipBackground) {
            canvas.saveLayer(mRectF, null, Canvas.ALL_SAVE_FLAG);
            super.draw(canvas);
            canvas.drawPath(genPath(), mPaint);
            canvas.restore();
        } else {
            super.draw(canvas);
        }
    }

    private void draw28(Canvas canvas) {
        if (isClipBackground) {
            canvas.save();
            canvas.clipPath(genPath());
            super.draw(canvas);
            canvas.restore();
        } else {
            super.draw(canvas);
        }
    }

    private void dispatchDraw27(Canvas canvas) {
        canvas.saveLayer(mRectF, null, Canvas.ALL_SAVE_FLAG);
        super.dispatchDraw(canvas);
        canvas.drawPath(genPath(), mPaint);
        canvas.restore();
    }

    private void dispatchDraw28(Canvas canvas) {
        canvas.save();
        canvas.clipPath(genPath());
        super.dispatchDraw(canvas);
        canvas.restore();
    }

    private Path genPath() {
        mPath.reset();
        mPath.addRoundRect(mRectF, mRadius, mRadius, Path.Direction.CW);
        return mPath;
    }
}
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xml文件

    <declare-styleable name="RoundConstraintLayout">
        <attr name="rcRadius" format="dimension" />
        <attr name="rcClipBackground" format="boolean" />
    </declare-styleable>
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直接同过设置布局的圆角，就不用再设置父布局中同宽度子控件的圆角了。