在DCIM /公用文件夹的Android prevent节约照片 [英] Android prevent saving photo on DCIM / public folder
问题描述
I'm开发Android应用程序。用户可能需要点击一个按钮后的照片。这张照片将被保存到内部包存储（数据/数据/包/ ...）用下面的方法：
I´m developing an Android application. The user could take a photo after a button click. This photo will be saved to internal package storage (data/data/package/...) with the following method:
private String saveToInternalSorage(Bitmap bitmapImage){
ContextWrapper cw = new ContextWrapper(getApplicationContext());
File directory = cw.getDir("TEST", Context.MODE_PRIVATE);
File pod = new File(directory, object.getTitle() + "" +
object.getName() + "" + object.getAge() + ".jpg");
FileOutputStream fos = null;
try {
fos = new FileOutputStream(pod);
bitmapImage.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
return pod.getAbsolutePath();
}
也可以汇入作业中删除从该目录的图片。这就像一个魅力。测试在仿真器和扎根电话。但照片也被保存到公用文件夹DCIM。与HTC ONE迷你I'm测试（withtout SD卡？）。下面是code足见其方法取并获得照片。
Also it´s possible to delete the picture from this directory. This works like a charm. Tested on Emulator and rooted phone. But the photos were also saved to the public folder DCIM. I´m testing with HTC ONE mini (withtout SD CARD?). Below is the code which shows the methods to take and get the photos.
public void takePhoto() {
cameraintent = new Intent("android.media.action.IMAGE_CAPTURE");
startActivityForResult(cameraintent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE) {
if (resultCode == Activity.RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap bmp = (Bitmap) extras.get("data");
setPath(saveToInternalSorage(bmp));
我想prevent的照片存储在公共文件夹中。我以删除DCIM文件夹中最新的文件的方法失败，因为 getExternalStorageDirectory（）给了我一个模拟路径（如模拟/ SD卡/ ...）上的HTC One迷你。并that's definitly不正确的路径。所以，我怎么能确定这照片会在一个公共文件夹中只存储到内部封装结构，而不是（无SD卡/带SD卡）。而当我在公众文件夹中删除的照片怎么做我得到正确的路径（/不同设备上的）？
I would like to prevent the storage of the photos in a public folder. My approach to delete the latest files in the DCIM folder failed because getExternalStorageDirectory() gives me a emulated path (like emulated/sdcard/...) on HTC One mini. And that´s definitly not the correct path. So how could i be sure that photos will be only stored to the internal package structure and not (without SD card/ with SD card) in a public folder. And when i have to delete photos in the public folder how to do i get the right path (for/on different devices)?
我发现没有解决方案，以prevent存储在从一开始就公共文件夹。
I found no solution to prevent the storage in a public folder "from the beginning".
在此先感谢！
修改
下面的方法应该能够删除从DCIM /公用文件夹的照片。
The method below should be able to delete the photo from the DCIM/ public folder.
private void deleteLatestFromDCIM() {
File f = new File(Environment.getExternalStorageDirectory() + "");
File [] files = f.listFiles();
Arrays.sort( files, new Comparator<Object>()
{
public int compare(Object o1, Object o2) {
if (((File)o1).lastModified() > ((File)o2).lastModified()) {
return -1;
} else if (((File)o1).lastModified() < ((File)o2).lastModified()) {
return 1;
} else {
return 0;
}
...
if(files[0].exists())
files[0].delete();
的问题是，在DCIM /公用文件夹照片得到的通用名称。见下图：
The problem is that photos in DCIM/public folder get generic names. See image below:
那么，如何删除其名字我不知道的图像？在内部存储器中的照片保存工作正常！我不惯于他们在一个公共文件夹中。并与getExternalStorageDirectory（）方法，如上文所述，我得到一个模拟的路径。这是真正的路径DCIM /公用文件夹？
So, how to delete images whose names i don´t "know"? Storing of photos in internal memory works fine! I don´t wont them in a public folder. And with the getExternalStorageDirectory() method i get an emulated path as described above. Is this really the path to the DCIM/public folder?
推荐答案
对不起，回答我的问题，希望这将是有益的其他开发人员：
我的策略：拍摄照片中的问题描述，将它保存到内部存储器（数据/数据/ com.package ...）
之后，从公用文件夹（DCIM /媒体/ 100MEDIA）用下面的方法删除它（从文件夹中删除最后拍摄的照片...）：
Sorry for answering my own question, hope this will be helpfully for other developers: My strategy: Capture the photo as described in the question, save it into the internal memory (data/data/com.package...) After that delete it from the public folder (DCIM/MEDIA/100MEDIA) with the following method (delete last taken picture from that folder...):
private void deleteLastPhotoTaken() {
String[] projection = new String[] {
MediaStore.Images.ImageColumns._ID,
MediaStore.Images.ImageColumns.DATA,
MediaStore.Images.ImageColumns.BUCKET_DISPLAY_NAME,
MediaStore.Images.ImageColumns.DATE_TAKEN,
MediaStore.Images.ImageColumns.MIME_TYPE };
final Cursor cursor = getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection,
null,null, MediaStore.Images.ImageColumns.DATE_TAKEN + "
DESC");
if (cursor != null) {
cursor.moveToFirst();
int column_index_data =
cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
String image_path = cursor.getString(column_index_data);
File file = new File(image_path);
if (file.exists()) {
file.delete();
正如在其他解决方案中提到：鸵鸟政策关闭游标！ Android将会为你做。
As mentioned in other solutions: Don´t close the cursor! Android will do that for you.
这篇关于在DCIM /公用文件夹的Android prevent节约照片的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
