我想编写一个仅具有此功能的应用程序: - 使用手机摄像头拍摄图像 - 将其作为邮件附件发送到给定地址
我写了下面的代码,我不明白为什么我无法退出相机模式(按接受按钮没有效果)
public class MainActivity extends Activity {
private static final int CAMERA_REQUEST = 1888;
private ImageView imageView;
private File f;
public File getAlbumDir()
{
File storageDir = new File(
Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES
),
"BAC/"
);
return storageDir;
}
private File createImageFile() throws IOException {
// Create an image file name
String imageFileName =getAlbumDir().toString() +"/image.jpg";
File image = new File(imageFileName);
return image;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.imageView = (ImageView)this.findViewById(R.id.imageView1);
Button photoButton = (Button) this.findViewById(R.id.button1);
photoButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
f = createImageFile();
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
startActivityForResult(cameraIntent, CAMERA_REQUEST);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("message/rfc822");
i.putExtra(Intent.EXTRA_EMAIL , new String[]{"<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="583e312a2b2c7634392b2c183f35393134763b3735" rel="noreferrer noopener nofollow">[email protected]</a>"});
i.putExtra(Intent.EXTRA_SUBJECT, "first picture");
i.putExtra(Intent.EXTRA_TEXT , "body of email");
Uri uri = Uri.fromFile(f);
i.putExtra(Intent.EXTRA_STREAM, uri);
try {
startActivity(Intent.createChooser(i, "Send mail..."));
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(MainActivity.this, "There are no email clients installed.", Toast.LENGTH_SHORT).show();
}
}
}
}
如有任何建议,我将不胜感激! 谢谢!
最佳答案
相机无法返回,因为您的相册目录不存在。尝试使用
public File getAlbumDir() {
File storageDir = new File(
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
"BAC/"
);
// Create directories if needed
if (!storageDir.exists()) {
storageDir.mkdirs();
}
return storageDir;
}
此外,由于您提供了 EXTRA_OUTPUT
额外内容,因此 onActivityResult()
中的参数 data
可能为 null 。您可以从 File
对象构建位图
Bitmap photo = BitmapFactory.decodeFile(f.getAbsolutePath());
关于android - Android 中用相机拍照并将其发送到邮件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16993459/