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Android屏幕及view的截圖實例詳解
屏幕可見區域的截圖
整個屏幕截圖的話可以用View view = getWindow().getDecorView();
public static Bitmap getNormalViewScreenshot(View view) {
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
return view.getDrawingCache();
}
scrollview的整體截屏
public static Bitmap getWholeScrollViewToBitmap(View view) {
view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
view.buildDrawingCache();
Bitmap bitmap = view.getDrawingCache();
return bitmap;
}
webview的整體截圖
public static Bitmap getWholeWebViewToBitmap(WebView webView) {
Picture snapShot = webView.capturePicture();
Bitmap bmp = Bitmap.createBitmap(snapShot.getWidth(), snapShot.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bmp);
snapShot.draw(canvas);
return bmp;
}
listview的整體截圖
public static Bitmap getWholeListViewItemsToBitmap(ListView listview) {
ListAdapter adapter = listview.getAdapter();
int itemscount = adapter.getCount();
int allitemsheight = 0;
List<Bitmap> bmps = new ArrayList<Bitmap>();
for (int i = 0; i < itemscount; i++) {
View childView = adapter.getView(i, null, listview);
childView.measure(MeasureSpec.makeMeasureSpec(listview.getWidth(), MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
childView.layout(0, 0, childView.getMeasuredWidth(), childView.getMeasuredHeight());
childView.setDrawingCacheEnabled(true);
childView.buildDrawingCache();
bmps.add(childView.getDrawingCache());
allitemsheight += childView.getMeasuredHeight();
}
Bitmap bigbitmap = Bitmap.createBitmap(listview.getMeasuredWidth(), allitemsheight, Bitmap.Config.ARGB_8888);
Canvas bigcanvas = new Canvas(bigbitmap);
Paint paint = new Paint();
int iHeight = 0;
for (int i = 0; i < bmps.size(); i++) {
Bitmap bmp = bmps.get(i);
bigcanvas.drawBitmap(bmp, 0, iHeight, paint);
iHeight += bmp.getHeight();
bmp.recycle();
bmp = null;
}
return bigbitmap;
}
需要多次截圖的話，需要用到 view.destroyDrawingCache();
Bitmap normalViewScreenshot = ScreenShotUtils.getNormalViewScreenshot(mFrameContent);
if (normalViewScreenshot != null) {
Bitmap b = Bitmap.createBitmap(normalViewScreenshot);
mImageResult.setImageBitmap(b);
mFrameContent.destroyDrawingCache();
}
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