Question

android怎么生成bitmap

Answer 1

1、

[java] view plain copy
public Bitmap convertViewToBitmap(View view){

Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(),
Bitmap.Config.ARGB_8888);
//利用bitmap生成画布
Canvas canvas = new Canvas(bitmap);

//把view中的内容绘制在画布上
view.draw(canvas);

return bitmap;
}

2、

[java] view plain copy
/**
* save view as a bitmap
*/
private Bitmap saveViewBitmap(View view) {
// get current view bitmap
view.setDrawingCacheEnabled(true);
view.buildDrawingCache(true);
Bitmap bitmap = view.getDrawingCache(true);

Bitmap bmp = duplicateBitmap(bitmap);
if (bitmap != null && !bitmap.isRecycled()) { bitmap.recycle(); bitmap = null; }
// clear the cache
view.setDrawingCacheEnabled(false);
return bmp;
}

public static Bitmap duplicateBitmap(Bitmap bmpSrc)
{
if (null == bmpSrc)
{ return null; }

int bmpSrcWidth = bmpSrc.getWidth();
int bmpSrcHeight = bmpSrc.getHeight();

Bitmap bmpDest = Bitmap.createBitmap(bmpSrcWidth, bmpSrcHeight, Config.ARGB_8888); if (null != bmpDest) { Canvas canvas = new Canvas(bmpDest); final Rect rect = new Rect(0, 0, bmpSrcWidth, bmpSrcHeight);

canvas.drawBitmap(bmpSrc, rect, rect, null); }

return bmpDest;
}