Android-View

RoundedCornersRLayout(通用圆角容器)

package com.yellow5a5.roundedcornerslayout;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.RelativeLayout;

/**
 * Created by Yellow5A5 on 2017/8/16.
 * 可配圆角裁剪容器，直接外部包裹一层即可。
 */
public class RoundedCornersRLayout extends RelativeLayout {

    private Path mPath;
    private int mXcornor;
    private int mYcornor;
    private int mBorderColor;
    private int mBorderSize;
    private float mDensity;
    private Paint mBorderPaint = new Paint();

    public RoundedCornersRLayout(Context context) {
        this(context, null);
    }

    public RoundedCornersRLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public RoundedCornersRLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.RoundedCornersRLayout);
        mXcornor = typedArray.getDimensionPixelSize(R.styleable.RoundedCornersRLayout_x_corners, 4);
        mYcornor = typedArray.getDimensionPixelSize(R.styleable.RoundedCornersRLayout_y_corners, 4);
        mBorderSize = typedArray.getDimensionPixelSize(R.styleable.RoundedCornersRLayout_border_width, 0);
        mBorderColor = typedArray.getColor(R.styleable.RoundedCornersRLayout_border_color, -1);
        mDensity = context.getResources().getDisplayMetrics().density;
        mXcornor *= mDensity;
        mYcornor *= mDensity;
        setWillNotDraw(false);
        setLayerType(View.LAYER_TYPE_SOFTWARE, null);
        typedArray.recycle();

        if(mBorderSize != 0 && mBorderColor != -1){
            mBorderPaint.setAntiAlias(true);
            mBorderPaint.setColor(mBorderColor);
            mBorderPaint.setStrokeWidth(mBorderSize);
            mBorderPaint.setStyle(Paint.Style.STROKE);
        }
    }
    @Override
    public void draw(Canvas canvas) {
        if (mPath == null) {
            mPath = new Path();
            mPath.addRoundRect(new RectF(0, 0, getWidth(), getHeight()), mXcornor, mYcornor, Path.Direction.CW);
        }
        canvas.clipPath(mPath);
        if(mBorderSize != 0 && mBorderColor != -1){
            canvas.drawPath(mPath, mBorderPaint);
        }
        super.draw(canvas);
    }
}


atts.xml
<resources>
    <declare-styleable name="RoundedCornersRLayout">
        <attr name="x_corners" format="dimension" />
        <attr name="y_corners" format="dimension" />
        <attr name="border_color" format="color" />
        <attr name="border_width" format="dimension" />
    </declare-styleable>
</resources>