对于大学,我必须在 android 上开发一个带有面部检测的应用程序。为此,我必须在我的画廊中保存各种照片。问题是保存照片后,图库没有更新。更准确地说,如果我删除要保存图像的目录,我打开应用程序并拍摄照片,然后进入画廊并在“更新”后看到照片。但是一旦我有了目录,如果我拍一张新照片,这并没有覆盖旧照片。
在网上我发现了这个:
sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED,Uri.parse("file://" + Environment.getExternalStorageDirectory())));
......但它不起作用!
这是我的代码:
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ImageButton buttonPicture = (ImageButton) findViewById(R.id.camera_surface_button);
buttonPicture.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
mCamera.takePicture(null, null, jpegCallback);
//File file = new File(savedPath, "ing.jpg");
sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED,Uri.parse("file://" + Environment.getExternalStorageDirectory())));
}
});
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PictureCallback jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] _data, Camera _camera) {
imagesFolder = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "/TTRprova");
imagesFolder.mkdirs();
String fileName = "image3.jpg";
File output = new File(imagesFolder, fileName);
textView1.setText("-----Sono nella callback-----");
Uri outputFileUri = Uri.fromFile(output);
String filePath = outputFileUri.getPath();
File file= new File(filePath);
try {
FileOutputStream fos = new FileOutputStream(file, true);
fos.write(_data);
fos.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
textView1.setText("-----FileNotFoundException-----");
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
textView1.setText("-----IOException-----");
e.printStackTrace();
}
//riparte la preview della camera
//mCamera.startPreview();
}
};
希望得到您的帮助。再见