最近收到一个分享图需求，需要将当前页面进行截取后，生成一个Bitmap保存到相册或分享到微信/朋友圈。
而分享时需要隐去页面上很多按钮和文字，如果直接使用DrawingCache在保存的时候用户会看到页面元素消失再显示，那么这样体验会很差，所以使用另一种方式来实现。
1
2
3
4
5
6
7
| public static Bitmap createBitmapFromView(View view) {
view.setDrawingCacheEnabled(true);
view.buildDrawingCache(true);
Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache());
view.setDrawingCacheEnabled(false);
return bitmap;
}
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
public Bitmap createBitmapFromInvisibleView(View v, int dpWidth, int dpHeight) {
int measuredWidth = View.MeasureSpec.makeMeasureSpec(DisplayUtils.dp2px(dpWidth), View.MeasureSpec.EXACTLY);
int measuredHeight = View.MeasureSpec.makeMeasureSpec(DisplayUtils.dp2px(dpHeight), View.MeasureSpec.EXACTLY);
v.measure(measuredWidth, measuredHeight);
v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
Bitmap bmp = Bitmap.createBitmap(v.getWidth(), v.getHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bmp);
c.drawColor(Color.WHITE);
v.draw(c);
return bmp;
}
|
- 补充：将Bitmap位图保存到相册中的方法
如果需要将图片保存到相册中，可以参考此方法，支持版本Android-Q
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
| public static String saveBitmapAndroidQ(Context context, String dir, Bitmap b) {
long dataTake = System.currentTimeMillis();
String jpegName = "IMG_" + dataTake + ".jpg";
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.DISPLAY_NAME, jpegName);
values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
values.put(MediaStore.Images.Media.RELATIVE_PATH, "DCIM/" + dir);
Uri external;
ContentResolver resolver = context.getContentResolver();
String status = Environment.getExternalStorageState();
if (status.equals(Environment.MEDIA_MOUNTED)) {
external = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else {
external = MediaStore.Images.Media.INTERNAL_CONTENT_URI;
}
Uri insertUri = resolver.insert(external, values);
if (insertUri == null) {
return "";
}
OutputStream os;
try {
os = resolver.openOutputStream(insertUri);
b.compress(Bitmap.CompressFormat.JPEG, 100, os);
if (os != null) {
os.flush();
os.close();
}
return insertUri.toString();
} catch (IOException e) {
e.printStackTrace();
return "";
}
}
|
参考：