我正在拍摄快照并创建缩略图,然后分享这张图片。但缩略图显示全黑。我使用了以下代码
Bitmap bitmap;
View v1 = v.getRootView();
v1.setDrawingCacheEnabled(true);
bitmap = Bitmap.createBitmap(v1.getDrawingCache());
String url = Images.Media.insertImage(
mContext.getContentResolver(), bitmap, "title", null);
谁能告诉我这段代码有什么问题。
编辑
private View.OnClickListener shareListener = new View.OnClickListener() {
public void onClick(View v) {
Bitmap bitmap;
View v1 = v.getRootView();
v1.setDrawingCacheEnabled(true);
bitmap = Bitmap.createBitmap(v1.getDrawingCache());
String url = Images.Media.insertImage(
mContext.getContentResolver(), bitmap, "title", null);
v1.setDrawingCacheEnabled(false);
Activity activity = (Activity) getContext();
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("image/jpeg");
share.putExtra(Intent.EXTRA_STREAM, Uri.parse(url));
activity.startActivity(Intent.createChooser(share,
"Share"));
}
};
黑图
最佳答案
使用以下代码可能对您有用。谢谢
SCREENSHOTS_LOCATIONS = Environment.getExternalStorageDirectory().toString() + "/screenshots/";
// Get root view
View view = activity.getWindow().getDecorView().getRootView();
// Create the bitmap to use to draw the screenshot
final Bitmap bitmap = Bitmap.createBitmap(screenWidth, screenHeight, Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(bitmap);
// Get current theme to know which background to use
final Theme theme = activity.getTheme();
final TypedArray ta = theme
.obtainStyledAttributes(new int[] { android.R.attr.windowBackground });
final int res = ta.getResourceId(0, 0);
final Drawable background = activity.getResources().getDrawable(res);
// Draw background
background.draw(canvas);
// Draw views
view.draw(canvas);
// Save the screenshot to the file system
FileOutputStream fos = null;
try {
final File sddir = new File(SCREENSHOTS_LOCATIONS);
if (!sddir.exists()) {
sddir.mkdirs();
}
fos = new FileOutputStream(SCREENSHOTS_LOCATIONS
+ System.currentTimeMillis() + ".jpg");
if (fos != null) {
if (!bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fos)) {
Log.d("ScreenShot", "Compress/Write failed");
}
fos.flush();
fos.close();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
关于android - 截图显示黑色,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16610404/