我在尋找： 現有照片庫名稱列表（希望它們的頂部縮略圖也是如此） 圖庫的內容（然後我可以根據需要加載縮略圖和全尺寸）獲取Android上相冊的列表
我該如何去獲取「圖庫」列表（不知道這是Android應用程序中適用於圖庫應用程序中可見圖像分組的名稱...）及其內容嗎？我需要訪問它的結構中的圖庫，而不使用現有的圖庫顯示（我正在創建一個全新的圖層，而不是照片請求者的一層）
我假設MediaStore.Images是我需要的但我沒有看到任何會給我分組的東西...
分組由MediaStore.Images.Media.BUCKET_DISPLAY_NAME定義。下面是示例代碼列出的圖像，並記錄他們的鬥名字和date_taken：
// which image properties are we querying
String[] projection = new String[] {
MediaStore.Images.Media._ID,
MediaStore.Images.Media.BUCKET_DISPLAY_NAME,
MediaStore.Images.Media.DATE_TAKEN
};
// content:// style URI for the "primary" external storage volume
Uri images = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
// Make the query.
Cursor cur = managedQuery(images,
projection, // Which columns to return
null, // Which rows to return (all rows)
null, // Selection arguments (none)
null // Ordering
);
Log.i("ListingImages"," query count=" + cur.getCount());
if (cur.moveToFirst()) {
String bucket;
String date;
int bucketColumn = cur.getColumnIndex(
MediaStore.Images.Media.BUCKET_DISPLAY_NAME);
int dateColumn = cur.getColumnIndex(
MediaStore.Images.Media.DATE_TAKEN);
do {
// Get the field values
bucket = cur.getString(bucketColumn);
date = cur.getString(dateColumn);
// Do something with the values.
Log.i("ListingImages", " bucket=" + bucket
+ " date_taken=" + date);
} while (cur.moveToNext());
}
/**
* Getting All Images Path
*
* @param activity
* @return ArrayList with images Path
*/
public static ArrayList<String> getAllShownImagesPath(Activity activity) {
Uri uri;
Cursor cursor;
int column_index_data, column_index_folder_name;
ArrayList<String> listOfAllImages = new ArrayList<String>();
String absolutePathOfImage = null;
uri = android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
String[] projection = { MediaColumns.DATA,
MediaStore.Images.Media.BUCKET_DISPLAY_NAME };
cursor = activity.getContentResolver().query(uri, projection, null,
null, null);
column_index_data = cursor.getColumnIndexOrThrow(MediaColumns.DATA);
column_index_folder_name = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.BUCKET_DISPLAY_NAME);
while (cursor.moveToNext()) {
absolutePathOfImage = cursor.getString(column_index_data);
listOfAllImages.add(absolutePathOfImage);
}
return listOfAllImages;
}
不要忘記添加
下面是幾個簡單的步驟完整的解決方案：
接下來的幾個步驟將全局唯一標識符你如何創建一個Vector，用於存放給定設備上的相冊。每張專輯都會保存一張預覽圖像以及一張內部的Vector，以容納相冊的所有圖像。
創建一個對象，該對象將保存從存儲中提取的圖像。我們打算將它稱爲PhoneAlbum。這是怎麼回事看：
public class PhoneAlbum {
private int id;
private String name;
private String coverUri;
private Vector<PhonePhoto> albumPhotos;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCoverUri() {
return coverUri;
}
public void setCoverUri(String albumCoverUri) {
this.coverUri = albumCoverUri;
}
public Vector<PhonePhoto> getAlbumPhotos() {
if (albumPhotos == null) {
albumPhotos = new Vector<>();
}
return albumPhotos;
}
public void setAlbumPhotos(Vector<PhonePhoto> albumPhotos) {
this.albumPhotos = albumPhotos;
}
}
創建一個對象，將舉行名爲專輯內的圖像：PhonePhoto
public class PhonePhoto {
private int id;
private String albumName;
private String photoUri;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getAlbumName() {
return albumName;
}
public void setAlbumName(String name) {
this.albumName = name;
}
public String getPhotoUri() {
return photoUri;
}
public void setPhotoUri(String photoUri) {
this.photoUri = photoUri;
}
}
創建界面完成後處理提取的圖像。我們打算叫它OnPhoneImagesObtained。那就是：
public interface OnPhoneImagesObtained {
void onComplete(Vector<PhoneAlbum> albums);
void onError();
}
創建一個新類：DeviceImageManager
public class DeviceImageManager {
}
一旦你創建DeviceImageManager，添加以下方法：
public static void getPhoneAlbums(Context context , OnPhoneImagesObtained listener){
// Creating vectors to hold the final albums objects and albums names
Vector<PhoneAlbum> phoneAlbums = new Vector<>();
Vector<String> albumsNames = new Vector<>();
// which image properties are we querying
String[] projection = new String[] {
MediaStore.Images.Media.BUCKET_DISPLAY_NAME,
MediaStore.Images.Media.DATA,
MediaStore.Images.Media._ID
};
// content: style URI for the "primary" external storage volume
Uri images = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
// Make the query.
Cursor cur = context.getContentResolver().query(images,
projection, // Which columns to return
null, // Which rows to return (all rows)
null, // Selection arguments (none)
null // Ordering
);
if (cur != null && cur.getCount() > 0) {
Log.i("DeviceImageManager"," query count=" + cur.getCount());
if (cur.moveToFirst()) {
String bucketName;
String data;
String imageId;
int bucketNameColumn = cur.getColumnIndex(
MediaStore.Images.Media.BUCKET_DISPLAY_NAME);
int imageUriColumn = cur.getColumnIndex(
MediaStore.Images.Media.DATA);
int imageIdColumn = cur.getColumnIndex(
MediaStore.Images.Media._ID);
do {
// Get the field values
bucketName = cur.getString(bucketNameColumn);
data = cur.getString(imageUriColumn);
imageId = cur.getString(imageIdColumn);
// Adding a new PhonePhoto object to phonePhotos vector
PhonePhoto phonePhoto = new PhonePhoto();
phonePhoto.setAlbumName(bucketName);
phonePhoto.setPhotoUri(data);
phonePhoto.setId(Integer.valueOf(imageId));
if (albumsNames.contains(bucketName)) {
for (PhoneAlbum album : phoneAlbums) {
if (album.getName().equals(bucketName)) {
album.getAlbumPhotos().add(phonePhoto);
Log.i("DeviceImageManager", "A photo was added to album => " + bucketName);
break;
}
}
} else {
PhoneAlbum album = new PhoneAlbum();
Log.i("DeviceImageManager", "A new album was created => " + bucketName);
album.setId(phonePhoto.getId());
album.setName(bucketName);
album.setCoverUri(phonePhoto.getPhotoUri());
album.getAlbumPhotos().add(phonePhoto);
Log.i("DeviceImageManager", "A photo was added to album => " + bucketName);
phoneAlbums.add(album);
albumsNames.add(bucketName);
}
} while (cur.moveToNext());
}
cur.close();
listener.onComplete(phoneAlbums);
} else {
listener.onError();
}
}
現在你就只剩下了將圖像渲染到屏幕上。在我的情況下，我喜歡使用Picasso。下面是我如何做到這一點：
Picasso.with(getActivity())
.load("file:" + mPhoneAlbums.get(i).getCoverUri())
.centerCrop()
.fit()
.placeholder(R.drawable.temp_image)
.into(mAlbumPreview);
不要忘記添加權限在您的清單讀取外部存儲：
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
就是這樣。你已準備好出發！ 祝你好運！
從這裏（Get all images from gallery in android programmatically）
activity_main.xml中
<RelativeLayout android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
xmlns:android="http://schemas.android.com/apk/res/android">
<GridView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/gv_folder"
android:numColumns="2"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"></GridView>
</RelativeLayout>
MainActivity.java
package galleryimages.galleryimages;
import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.Toast;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
public static ArrayList<Model_images> al_images = new ArrayList<>();
boolean boolean_folder;
Adapter_PhotosFolder obj_adapter;
GridView gv_folder;
private static final int REQUEST_PERMISSIONS = 100;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gv_folder = (GridView)findViewById(R.id.gv_folder);
gv_folder.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Intent intent = new Intent(getApplicationContext(), PhotosActivity.class);
intent.putExtra("value",i);
startActivity(intent);
}
});
if ((ContextCompat.checkSelfPermission(getApplicationContext(),
Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) && (ContextCompat.checkSelfPermission(getApplicationContext(),
Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)) {
if ((ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)) && (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this,
Manifest.permission.READ_EXTERNAL_STORAGE))) {
} else {
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE},
REQUEST_PERMISSIONS);
}
}else {
Log.e("Else","Else");
fn_imagespath();
}
}
public ArrayList<Model_images> fn_imagespath() {
al_images.clear();
int int_position = 0;
Uri uri;
Cursor cursor;
int column_index_data, column_index_folder_name;
String absolutePathOfImage = null;
uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
String[] projection = {MediaStore.MediaColumns.DATA, MediaStore.Images.Media.BUCKET_DISPLAY_NAME};
final String orderBy = MediaStore.Images.Media.DATE_TAKEN;
cursor = getApplicationContext().getContentResolver().query(uri, projection, null, null, orderBy + " DESC");
column_index_data = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
column_index_folder_name = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.BUCKET_DISPLAY_NAME);
while (cursor.moveToNext()) {
absolutePathOfImage = cursor.getString(column_index_data);
Log.e("Column", absolutePathOfImage);
Log.e("Folder", cursor.getString(column_index_folder_name));
for (int i = 0; i < al_images.size(); i++) {
if (al_images.get(i).getStr_folder().equals(cursor.getString(column_index_folder_name))) {
boolean_folder = true;
int_position = i;
break;
} else {
boolean_folder = false;
}
}
if (boolean_folder) {
ArrayList<String> al_path = new ArrayList<>();
al_path.addAll(al_images.get(int_position).getAl_imagepath());
al_path.add(absolutePathOfImage);
al_images.get(int_position).setAl_imagepath(al_path);
} else {
ArrayList<String> al_path = new ArrayList<>();
al_path.add(absolutePathOfImage);
Model_images obj_model = new Model_images();
obj_model.setStr_folder(cursor.getString(column_index_folder_name));
obj_model.setAl_imagepath(al_path);
al_images.add(obj_model);
}
}
for (int i = 0; i < al_images.size(); i++) {
Log.e("FOLDER", al_images.get(i).getStr_folder());
for (int j = 0; j < al_images.get(i).getAl_imagepath().size(); j++) {
Log.e("FILE", al_images.get(i).getAl_imagepath().get(j));
}
}
obj_adapter = new Adapter_PhotosFolder(getApplicationContext(),al_images);
gv_folder.setAdapter(obj_adapter);
return al_images;
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case REQUEST_PERMISSIONS: {
for (int i = 0; i < grantResults.length; i++) {
if (grantResults.length > 0 && grantResults[i] == PackageManager.PERMISSION_GRANTED) {
fn_imagespath();
} else {
Toast.makeText(MainActivity.this, "The app was not allowed to read or write to your storage. Hence, it cannot function properly. Please consider granting it this permission", Toast.LENGTH_LONG).show();
}
}
}
}
}
}
AH下載源代碼！它像一個原始數據庫查詢一樣工作。完美的示例代碼謝謝！ – ima747 2010-11-16 18:46:33
如何顯示照片？ – Marya 2014-03-13 09:30:01
如何獲取圖像路徑？爲每個dateToken？ – 2014-05-08 13:38:18