Android：从MediaStoremanagedQuery中的指定文件夹获取所有ID和路径
[英]Android: Get all id and path from specify folder in MediaStore managedQuery
问题描述
UPDATE Logcat and Java Code. 
UPDATE Logcat和Java代码。
Hi I want to get all image id,full path from specify folder on sd-card. 嗨，我想获取所有图像ID，从SD卡上指定文件夹的完整路径。
this my code. 这是我的代码。
private void Gallery() {
ImageList = new ArrayList<GalleryDetail>();
final String[] columns = { MediaStore.Images.Media.DATA,
MediaStore.Images.Media._ID };
Cursor image_cursor;
image_cursor = managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null,
new String[] {currentDir.toString()}, null);
if (image_cursor != null) {
while (image_cursor.moveToNext()) {
GalleryDetail img = new GalleryDetail();
String image_id = image_cursor.getString(image_cursor
.getColumnIndexOrThrow(MediaStore.Images.Media._ID));
String image_path = image_cursor.getString(image_cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA));
Log.e("get Path.", image_path);
img.setImageId(image_id);
img.setImagePath(image_path);
ImageList.add(img);
}
// List of file path
FilePathStrings = new String[ImageList.size()];
for (int i = 0; i < ImageList.size(); i++) {
FilePathStrings[i] = ImageList.get(i).getImagePath();
}
}
}
But it doesn't work for me and log cat show this message to me. 但这对我不起作用，日志猫向我显示此消息。
09-11 11:17:21.698: E/AndroidRuntime(1204): FATAL EXCEPTION: AsyncTask #1 09-11 11:17:21.698: E/AndroidRuntime(1204): java.lang.RuntimeException: An error occured while executing doInBackground() 09-11 11:17:21.698: E/AndroidRuntime(1204): at android.os.AsyncTask$3.done(AsyncTask.java:200) 09-11 11:17:21.698: E/AndroidRuntime(1204): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274) 09-11 11:17:21.698: E/AndroidRuntime(1204): at java.util.concurrent.FutureTask.setException(FutureTask.java:125) 09-11 11:17:21.698: E/AndroidRuntime(1204): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308) 09-11 11:17:21.698: E/AndroidRuntime(1204): at java.util.concurrent.FutureTask.run(FutureTask.java:138) 09-11 11:17:21.698: E/AndroidRuntime(1204): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 09-11 11:17:21.698: E/AndroidRuntime(1204): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 0
Please help.How can I solve this problem? 请帮忙。如何解决此问题？
Sorry for my very bad language skill.Thank in Advance :) 对不起，我的语言能力很差。先谢谢您了：)
1 个解决方案
解决方案1
1 2013-09-10 04:36:06
Have added this permission in mainfest.xml? 在mainfest.xml中添加了此权限？
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
UPDATE 更新
ArrayList<String> mFiles = new ArrayList<String>();
File mDirectory;
String folderPath = "/mnt/sdcard/download";
mDirectory = new File(folderPath);
// Get the files in the directory
File[] files = mDirectory.listFiles();
if (files != null && files.length > 0) {
for (File f : files) {
mFiles.add(f.getAbsolutePath());
}
}
UPDATE 更新
Recursive function to getAll images 递归函数获取所有图像
private ArrayList<String> allImages = new ArrayList<String>();
String[] extensions = { "jpg", "png", "jpeg", "JPG", "PNG", "JPEG" };
private void loadAllImages(String rootFolder) {
File file = new File(rootFolder);
if (file.isDirectory()) {
File[] files = file.listFiles();
if (files != null && files.length > 0) {
for (File f : files) {
if (f.isDirectory()) {
loadAllImages(f.getAbsolutePath());
} else {
for (int i = 0; i < extensions.length; i++) {
if (f.getAbsolutePath().endsWith(extensions[i])) {
allImages.add(f.getAbsolutePath());
}
}
}
}
}
}
}
UPDATE To fetch gallery images 更新以获取图库图像
private String[] arrPath;
private boolean[] thumbnailsselection;
private int ids[];
private int count;
final String[] columns = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID };
final String orderBy = MediaStore.Images.Media._ID;
Cursor imagecursor = managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null, new String[] {"%myimagesfolder%"}, orderBy); //UPDATE HERE
int image_column_index = imagecursor.getColumnIndex(MediaStore.Images.Media._ID);
count = imagecursor.getCount();
arrPath = new String[this.count];
ids = new int[count];
for (int i = 0; i < count; i++) {
imagecursor.moveToPosition(i);
ids[i] = imagecursor.getInt(image_column_index);
int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA);
arrPath[i] = imagecursor.getString(dataColumnIndex);
}
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