从文件创建位图返回空图片

Question

I wanted to do an app for sharing pictures from the gallery for learning and i want the picture to be renamed so i use a bitmap that retrieve the data of the picture. But the thing is the file is always returning null. I have a code and i don't know where is the problem.

File file = new File(this.getFilesDir().getAbsolutePath(), "logo");
if (!file.exists()) {
    file.mkdirs();
}
File iconf = new File(file, "icon_launcher.png");
iconf.createNewFile();
OutputStream ios = new FileOutputStream(iconf);

example.compress(Bitmap.CompressFormat.PNG, 80, ios);
ios.flush();
ios.close();


//String uricon=       MediaStore.Images.Media.insertImage(getContentResolver(),iconf.getAbsolutePath(),"icon_launcher.png","drawing");

Uri iconurl = Uri.parse(iconf.getAbsolutePath());

Intent email = new Intent(Intent.ACTION_SEND);
email.setType("image/png");

email.putExtra(Intent.EXTRA_STREAM, iconurl);

startActivityForResult(Intent.createChooser(email, "Envoyer par mail"), 1);

Thank you in advance for the help :)

Answer 1

我已成功使代码正常工作，我忘记使用FileProvider了，因为我没有外部存储。因此，您必须使用FileProvider才能使用内部存储。