Android Picture无法绘制求助

Question

在一个自定义View中写了如下代码，目的是使用Picture录制一段画法然后复制到View的canvas上。

经过测试，Picture可以录制画法（转换为流之后数据长度跟随画法复杂度上升而增加），但是转换为PictureDrawable之后，无法绘制在View的canvas上，试过网上介绍的几种方法，例如canvas.drawPicture(mPicture)和流转换，但无论如何都画不出来，是不是我哪里没有设置好？

以下是代码，求指教！

Picture mPicture;
PictureDrawable mDrawable;
Paint mPaint;

private void record(){
    mPicture = new Picture();
    mDrawable = new PictureDrawable(mPicture);
    mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    Canvas record = mPicture.beginRecording(getWidth(), getHeight());
    record.drawColor(Color.LTGRAY);
    record.drawCircle(50, 50, 50, mPaint);
    record.drawText("test picture", 50, 50, mPaint);
    mPicture.endRecording();
}

@Override
protected void onDraw(Canvas canvas){
    canvas.drawPicture(mPicture);
    canvas.drawPicture(mPicture,new RectF(0,100,getWidth(),200));
    mDrawable.setBounds(0,200,getWidth(),300);
    mDrawable.draw(canvas);
}

Answer 1

已解决，需要先将Picture绘制到一个Bitmap上，然后在onDraw方法里用canvas.drawBitmap绘制这个bitmap