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yutou 2022-08-23 16:29:06 +08:00
parent d7d81bc5a7
commit 7cccc48b80
1 changed files with 56 additions and 55 deletions
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Android/Demo1/RightGradual.java
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@ -1,55 +1,56 @@
package com.yunbao.live.custom;
import android.graphics.Canvas;
import android.graphics.Canvas; import android.graphics.Color;
import android.graphics.Color; import android.graphics.LinearGradient;
import android.graphics.LinearGradient; import android.graphics.Paint;
import android.graphics.Paint; import android.graphics.PorterDuff;
import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode;
import android.graphics.PorterDuffXfermode; import android.graphics.Shader;
import android.graphics.Shader; import android.graphics.Xfermode;
import android.graphics.Xfermode;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.RecyclerView;
/**
/** * RecyclerView右側渐变的itemDecoration
* Created by cxf on 2018/1/27. * 渐变参考文档：https://blog.csdn.net/u010126792/article/details/85237085
* RecyclerView右側渐变的itemDecoration * 半透明则是由0→黑的渐变效果
*/ * 使用方法： RecyclerView.addItemDecoration(new RightGradual());
*/
public class RightGradual extends RecyclerView.ItemDecoration {
public class RightGradual extends RecyclerView.ItemDecoration {
private Paint mPaint;
private Xfermode mXfermode; private Paint mPaint;
private LinearGradient mLinearGradient; private Xfermode mXfermode;
private int mLayerId; private LinearGradient mLinearGradient;
private int mLayerId;
public RightGradual() {
mPaint = new Paint(); public RightGradual() {
mXfermode = new PorterDuffXfermode(PorterDuff.Mode.DST_IN); mPaint = new Paint();
mLinearGradient = null; mXfermode = new PorterDuffXfermode(PorterDuff.Mode.DST_IN);
} mLinearGradient = null;
}
@Override
public void onDrawOver(Canvas canvas, RecyclerView parent, RecyclerView.State state) { @Override
super.onDrawOver(canvas, parent, state); public void onDrawOver(Canvas canvas, RecyclerView parent, RecyclerView.State state) {
float left=parent.getRight()-parent.getRight()/0.1f; super.onDrawOver(canvas, parent, state);
float top=0f; float left=parent.getRight()-parent.getRight()/0.1f;
float right=parent.getRight(); float top=0f;
float bottom=parent.getBottom(); float right=parent.getRight();
if(mLinearGradient==null){ float bottom=parent.getBottom();
mLinearGradient=new LinearGradient(parent.getMeasuredWidth(), 0.0f, 0.0f, 0.0f, new int[]{0, Color.BLACK}, new float[]{0.0f,0.2f}, Shader.TileMode.CLAMP); if(mLinearGradient==null){
} mLinearGradient=new LinearGradient(parent.getMeasuredWidth(), 0.0f, 0.0f, 0.0f, new int[]{0, Color.BLACK}, new float[]{0.0f,0.2f}, Shader.TileMode.CLAMP);
mPaint.setXfermode(mXfermode); }
mPaint.setShader(mLinearGradient); mPaint.setXfermode(mXfermode);
//mPaint.setColor(Color.BLUE); mPaint.setShader(mLinearGradient);
canvas.drawRect(left, top,right, bottom, mPaint); //mPaint.setColor(Color.BLUE);
mPaint.setXfermode(null); canvas.drawRect(left, top,right, bottom, mPaint);
canvas.restoreToCount(mLayerId); mPaint.setXfermode(null);
} canvas.restoreToCount(mLayerId);
}
@Override
public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) { @Override
super.onDraw(c, parent, state); public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
mLayerId = c.saveLayer(0.0f, 0.0f, (float) parent.getWidth(), (float) parent.getHeight(), mPaint, Canvas.ALL_SAVE_FLAG); super.onDraw(c, parent, state);
} mLayerId = c.saveLayer(0.0f, 0.0f, (float) parent.getWidth(), (float) parent.getHeight(), mPaint, Canvas.ALL_SAVE_FLAG);
} }
}