public void checkForNewImages() {
// Here we'll only check for newer images
final String[] columns = {MediaStore.Images.Thumbnails._ID};
final String orderBy = MediaStore.Images.Media._ID;
Cursor imagecursor =
managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
columns,
MediaStore.Images.Media._ID + " > " + lastId,
null,
orderBy);
int image_column_index = imagecursor.getColumnIndex(MediaStore.Images.Media._ID);
int count = imagecursor.getCount();
for (int i = 0; i < count; i++) {
imagecursor.moveToPosition(i);
int id = imagecursor.getInt(image_column_index);
ImageItem imageItem = new ImageItem();
imageItem.id = id;
lastId = id;
imageItem.img =
MediaStore.Images.Thumbnails.getThumbnail(
getApplicationContext().getContentResolver(),
id,
MediaStore.Images.Thumbnails.MICRO_KIND,
null);
imageItem.selection = true; // newly added item will be selected by default
images.add(imageItem);
}
imagecursor.close();
notifyDataSetChanged();
}
/*获取缩略图*/
public Bitmap getThumbnail(
ContentResolver contentResolver,
long originalId,
int kind,
BitmapFactory.Options options,
boolean isVideo) {
Thread thread = Thread.currentThread();
ThreadStatus threadStatus = getOrCreateThreadStatus(thread);
if (!canThreadDecoding(thread)) {
return null;
}
try {
synchronized (threadStatus) {
threadStatus.mThumbRequesting = true;
}
if (isVideo) {
return MediaStore.Video.Thumbnails.getThumbnail(
contentResolver, originalId, thread.getId(), kind, options);
} else {
return MediaStore.Images.Thumbnails.getThumbnail(
contentResolver, originalId, thread.getId(), kind, options);
}
} finally {
synchronized (threadStatus) {
threadStatus.mThumbRequesting = false;
threadStatus.notifyAll();
}
}
}
public void initialize() {
images.clear();
final String[] columns = {MediaStore.Images.Thumbnails._ID};
final String orderBy = MediaStore.Images.Media._ID;
Cursor imagecursor =
managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null, null, orderBy);
if (imagecursor != null) {
int image_column_index = imagecursor.getColumnIndex(MediaStore.Images.Media._ID);
int count = imagecursor.getCount();
for (int i = 0; i < count; i++) {
imagecursor.moveToPosition(i);
int id = imagecursor.getInt(image_column_index);
ImageItem imageItem = new ImageItem();
imageItem.id = id;
lastId = id;
imageItem.img =
MediaStore.Images.Thumbnails.getThumbnail(
getApplicationContext().getContentResolver(),
id,
MediaStore.Images.Thumbnails.MICRO_KIND,
null);
images.add(imageItem);
}
imagecursor.close();
}
notifyDataSetChanged();
}
public String insertImage(ContentResolver cr, Bitmap source, String title, String description) {
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, title);
values.put(MediaStore.Images.Media.DISPLAY_NAME, title);
values.put(MediaStore.Images.Media.DESCRIPTION, description);
values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
// Add the date meta data to ensure the image is added at the front of the gallery
values.put(MediaStore.Images.Media.DATE_ADDED, System.currentTimeMillis());
values.put(MediaStore.Images.Media.DATE_MODIFIED, System.currentTimeMillis());
values.put(MediaStore.Images.Media.DATE_TAKEN, System.currentTimeMillis());
if (frontFacingCamera && orientation == 90) // weird flipped front-facing camera
{
orientation += 180;
}
values.put(MediaStore.Images.Media.ORIENTATION, orientation);
Uri url = null;
String stringUrl = null; /* value to be returned */
try {
url = cr.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
if (source != null) {
OutputStream imageOut = cr.openOutputStream(url);
try {
source.compress(Bitmap.CompressFormat.JPEG, 50, imageOut);
} finally {
imageOut.close();
}
long id = ContentUris.parseId(url);
// Wait until MINI_KIND thumbnail is generated.
Bitmap miniThumb =
MediaStore.Images.Thumbnails.getThumbnail(
cr, id, MediaStore.Images.Thumbnails.MINI_KIND, null);
// This is for backward compatibility.
storeThumbnail(cr, miniThumb, id, 50F, 50F, MediaStore.Images.Thumbnails.MICRO_KIND);
} else {
cr.delete(url, null, null);
url = null;
}
} catch (Exception e) {
if (url != null) {
cr.delete(url, null, null);
url = null;
}
}
if (url != null) {
stringUrl = url.toString();
}
return stringUrl;
}
@Override
public Bitmap getBitmap(int position) {
// id 가져오기
long id = getItemId(position);
// Bitmap 샘플링
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 1; // 2의 배수
// id 로부터 bitmap 생성
return MediaStore.Images.Thumbnails.getThumbnail(
mContext.getContentResolver(), id, MediaStore.Images.Thumbnails.MINI_KIND, options);
}
public synchronized void cancelThreadDecoding(Thread thread, ContentResolver contentResolver) {
ThreadStatus threadStatus = getOrCreateThreadStatus(thread);
threadStatus.mState = State.CANCEL;
if (threadStatus.mOptions != null) {
threadStatus.mOptions.requestCancelDecode();
}
notifyAll();
try {
synchronized (threadStatus) {
while (threadStatus.mThumbRequesting) {
MediaStore.Images.Thumbnails.cancelThumbnailRequest(contentResolver, -1, thread.getId());
MediaStore.Video.Thumbnails.cancelThumbnailRequest(contentResolver, -1, thread.getId());
threadStatus.wait(200);
}
}
} catch (Exception exception) {
}
}
public Bitmap getBitmap() throws OutOfMemoryError {
if (mBitmap != null) {
return mBitmap;
}
mBitmap =
MediaStore.Images.Thumbnails.getThumbnail(
mContext.getContentResolver(),
mId,
MediaStore.Images.Thumbnails.MINI_KIND,
sBitmapOptionsCache);
String[] orientationColumn = {MediaStore.Images.Media.ORIENTATION};
Cursor cur =
mContext
.getContentResolver()
.query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
orientationColumn,
MediaStore.Images.Media._ID + "=?",
new String[] {Long.toString(mId)},
null);
int orientation = -1;
if (cur != null) {
if (cur.moveToFirst()) {
orientation = cur.getInt(cur.getColumnIndex(orientationColumn[0]));
}
cur.close();
}
if (orientation != 0 && orientation != -1) {
Matrix matrix = new Matrix();
matrix.postRotate(orientation);
if (mBitmap != null) {
int height = mBitmap.getHeight();
int width = mBitmap.getWidth();
mBitmap = Bitmap.createBitmap(mBitmap, 0, 0, width, height, matrix, true);
}
}
return mBitmap;
}
/**
* 获取图片缩略图 只有Android2.1以上版本支持
*
* @param imgName
* @param kind MediaStore.Images.Thumbnails.MICRO_KIND
* @return
*/
protected Bitmap loadImgThumbnail(String imgName, int kind) {
Bitmap bitmap = null;
String[] proj = {MediaStore.Images.Media._ID, MediaStore.Images.Media.DISPLAY_NAME};
Cursor cursor =
managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
proj,
MediaStore.Images.Media.DISPLAY_NAME + "='" + imgName + "'",
null,
null);
if (cursor != null && cursor.getCount() > 0 && cursor.moveToFirst()) {
ContentResolver crThumb = getContentResolver();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 1;
bitmap = MediaStore.Images.Thumbnails.getThumbnail(crThumb, cursor.getInt(0), kind, options);
}
return bitmap;
}
protected Bitmap getThumbnailOfLastPhoto() {
Cursor cursor =
MediaStore.Images.Media.query(
getContentResolver(),
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
new String[] {
MediaStore.Images.ImageColumns._ID, MediaStore.Images.ImageColumns.DATE_TAKEN
},
null,
null,
MediaStore.Images.ImageColumns.DATE_TAKEN + " DESC LIMIT 1");
Bitmap thumb = null;
if (cursor.moveToNext()) {
int id = cursor.getInt(0);
thumb =
MediaStore.Images.Thumbnails.getThumbnail(
getContentResolver(), id, MediaStore.Images.Thumbnails.MINI_KIND, null);
}
cursor.close();
return thumb;
}
/**
* Get a micro (96x96) thumbnail from the image at the Uri. The method is a mix of solutions from
* this thread on SO:
* http://stackoverflow.com/questions/5548645/get-thumbnail-uri-path-of-the-image-stored-in-sd-card-android
*
* @param uri Uri to the image
* @return Bitmap or null
*/
private Bitmap getThumbnail(Uri uri) {
String[] projection = {MediaStore.Images.Media._ID};
String result = null;
Cursor cursor = managedQuery(uri, projection, null, null, null);
Log.d(TAG, "cursor: " + cursor);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID);
Log.d(TAG, "column: " + column_index);
cursor.moveToFirst();
long imageId = cursor.getLong(column_index);
// cursor.close(); // can't close or else it crashes on a second attempt at changing pic
Log.d(TAG, "imageID: " + imageId);
Bitmap bitmap =
MediaStore.Images.Thumbnails.getThumbnail(
getContentResolver(), imageId, MediaStore.Images.Thumbnails.MICRO_KIND, null);
Log.d(TAG, "bitmap: " + bitmap);
return bitmap;
}
/**
* Attempt to retrieve the thumbnail of given Uri from the MediaStore. This should not be called
* on the UI thread.
*
* @param context
* @param uri
* @param mimeType
* @return
* @author paulburke
*/
public static Bitmap getThumbnail(Context context, Uri uri, String mimeType) {
if (DEBUG) Log.d(TAG, "Attempting to get thumbnail");
if (!isMediaUri(uri)) {
Log.e(TAG, "You can only retrieve thumbnails for images and videos.");
return null;
}
Bitmap bm = null;
if (uri != null) {
final ContentResolver resolver = context.getContentResolver();
Cursor cursor = null;
try {
cursor = resolver.query(uri, null, null, null, null);
if (cursor.moveToFirst()) {
final int id = cursor.getInt(0);
if (DEBUG) Log.d(TAG, "Got thumb ID: " + id);
if (mimeType.contains("video")) {
bm =
MediaStore.Video.Thumbnails.getThumbnail(
resolver, id, MediaStore.Video.Thumbnails.MINI_KIND, null);
} else if (mimeType.contains(FileUtils.MIME_TYPE_IMAGE)) {
bm =
MediaStore.Images.Thumbnails.getThumbnail(
resolver, id, MediaStore.Images.Thumbnails.MINI_KIND, null);
}
}
} catch (Exception e) {
if (DEBUG) Log.e(TAG, "getThumbnail", e);
} finally {
if (cursor != null) cursor.close();
}
}
return bm;
}
@TargetApi(7)
public static Bitmap getThumbnail(ContentResolver cr, long origId, int kind, Options options) {
return MediaStore.Images.Thumbnails.getThumbnail(cr, origId, kind, options);
}