我在我的应用程序中使用相机拍摄图像。
1）它将图像保存在sdcard上，其名称是我在意图中传递的。
2）还将图像保存在sdcard / dcim文件夹
我不希望相机在＃2中提到的位置保存图像。 我正在从＃1中的位置删除图像。并希望从＃2中的位置删除图像。
以下是捕获图片的代码段。
SD_CARD_TEMP_DIR = Environment.getExternalStorageDirectory() + File.separator + "tempImage.jpg";
file =new File(SD_CARD_TEMP_DIR);
Intent takePictureFromCameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
takePictureFromCameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
startActivityForResult(takePictureFromCameraIntent, TAKE_PICTURE_WITH_CAMERA);
答案 0 :(得分：1)
这Thread帮助我解决了这个问题。 现在我在做什么，1）捕获图像，2）在Media uri中读取最后一个图像，并删除它。
private void FillPhotoList() {
// initialize the list!
GalleryList.clear();
String[] projection = { MediaStore.Images.ImageColumns.DISPLAY_NAME };
for(int i=0;i<projection.length;i++)
Log.i("InfoLog","projection "+projection[0].toString());
// intialize the Uri and the Cursor, and the current expected size.
Cursor c = null;
Uri u = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
Log.i("InfoLog","FillPhoto Uri u "+u.toString());
// Query the Uri to get the data path. Only if the Uri is valid.
if (u != null)
{
c = managedQuery(u, projection, null, null, null);
}
// If we found the cursor and found a record in it (we also have the id).
if ((c != null) && (c.moveToFirst()))
{
do
{
// Loop each and add to the list.
GalleryList.add(c.getString(0)); // adding all the images sotred in the mobile phone(Internal and SD card)
}
while (c.moveToNext());
}
Log.i(INFOLOG,"gallery size "+ GalleryList.size());
}
public void movingCapturedImageFromDCIMtoMerchandising()
{
// This is ##### ridiculous. Some versions of Android save
// to the MediaStore as well. Not sure why! We don't know what
// name Android will give either, so we get to search for this
// manually and remove it.
String[] projection = { MediaStore.Images.ImageColumns.SIZE,
MediaStore.Images.ImageColumns.DISPLAY_NAME,
MediaStore.Images.ImageColumns.DATA,
BaseColumns._ID,};
// intialize the Uri and the Cursor, and the current expected size.
for(int i=0;i<projection.length;i++)
Log.i("InfoLog","on activityresult projection "+projection[i]);
//+" "+projection[1]+" "+projection[2]+" "+projection[3] this will be needed if u remove the for loop
Cursor c = null;
Uri u = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
Log.i("InfoLog","on activityresult Uri u "+u.toString());
if (CurrentFile != null)
{
// Query the Uri to get the data path. Only if the Uri is valid,
// and we had a valid size to be searching for.
if ((u != null) && (CurrentFile.length() > 0))
{
//****u is the place from data will come and projection is the specified data what we want
c = managedQuery(u, projection, null, null, null);
}
// If we found the cursor and found a record in it (we also have the size).
if ((c != null) && (c.moveToFirst()))
{
do
{
// Check each area in the gallery we built before.
boolean bFound = false;
for (String sGallery : GalleryList)
{
if (sGallery.equalsIgnoreCase(c.getString(1)))
{
bFound = true;
Log.i("InfoLog","c.getString(1) "+c.getString(1));
break;
}
}
// To here we looped the full gallery.
if (!bFound) //the file which is newly created and it has to be deleted from the gallery
{
// This is the NEW image. If the size is bigger, copy it.
// Then delete it!
File f = new File(c.getString(2));
// Ensure it's there, check size, and delete!
if ((f.exists()) && (CurrentFile.length() < c.getLong(0)) && (CurrentFile.delete()))
{
// Finally we can stop the copy.
try
{
CurrentFile.createNewFile();
FileChannel source = null;
FileChannel destination = null;
try
{
source = new FileInputStream(f).getChannel();
destination = new FileOutputStream(CurrentFile).getChannel();
destination.transferFrom(source, 0, source.size());
}
finally
{
if (source != null)
{
source.close();
}
if (destination != null)
{
destination.close();
}
}
}
catch (IOException e)
{
// Could not copy the file over.
ToastMaker.makeToast(this, "Error Occured", 0);
}
}
//****deleting the file which is in the gallery
Log.i(INFOLOG,"imagePreORNext1 "+imagePreORNext);
Handler handler = new Handler();
//handler.postDelayed(runnable,300);
Log.i(INFOLOG,"imagePreORNext2 "+imagePreORNext);
ContentResolver cr = getContentResolver();
cr.delete(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, BaseColumns._ID + "=" + c.getString(3), null);
break;
}
}
while (c.moveToNext());
}
}
}
答案 1 :(得分：0)
您可以使用以下内容：首先，我们通过检查哪个是最后修改的图像来获取最后保存的图像。而不是简单地删除它。
private boolean deleteLastFromDCIM() {
boolean success = false;
try {
File[] images = new File(Environment.getExternalStorageDirectory()
+ File.separator + "DCIM/Camera").listFiles();
File latestSavedImage = images[0];
for (int i = 1; i < images.length; ++i) {
if (images[i].lastModified() > latestSavedImage.lastModified()) {
latestSavedImage = images[i];
}
}
// OR just use success = latestSavedImage.delete();
success = new File(Environment.getExternalStorageDirectory()
+ File.separator + "DCIM/Camera/"
+ latestSavedImage).delete();
return success;
} catch (Exception e) {
e.printStackTrace();
return success;
}
}