先声明授人与鱼不如授人与渔，仅仅能提供一个思路，当然须要源代码的同学能够私下有偿问我要源代码：QQ：508181017
工作了将近三年时间了，一直没正儿八经的研究系统自带的相冊和拍照，这回来个高仿微信的拍照、多选、预览、删除(去除相片)相冊功能，
之前开发的全部应用都带有这需求，可是一直都不有用！废话就不多说了，先来捋一下思路:
1、拍照能实时保存到本地并实时查询(不必用广播或者服务)
2、拍照保存到到自己定义路径并依据不同目录显示目录下的相片
3、多选规定张数图片
4、用到的集合有：
(1)、全部相片集合
(2)、不同文件下相片集合
(3)、系统保存相片的目录集合
(4)、已选中相片集合
5、每次选中返回上级界面时都要传递已选中的相片来跟当前所显示的相冊集合进行对照使得checkbox是否勾选
6、自己碰到的问题有：
(1)、当选择相片量超过特定数量时CheckBox的setOnCheckedChangeListener事件会出现错误(不是bug，可能我的代码逻辑不够严谨)，主要是在设定控件自带的setChecked(false|true)方法时出现的。
所以我用了onClick方法来实现其选中状态。
(2)、预览相冊返回上级(展示目录下的相片)时集合的对照。在考虑到性能的情况下，本人用了map集合来记录保存已选中的相片。
回调界面时遍历当前目录下的相片推断map集合是否包括，包括则让checkbox为选中状态。
(3)、在删除图片时，自己的业务并不和微信的一样。此项目仅仅让用户选中和不选中而已回调到界面一样是能够显示自己所要的效果。
7、主要代码：
(1)、获取近期照片列表
public List<PhotoModel> getCurrent() {
Cursor cursor = resolver.query(Media.EXTERNAL_CONTENT_URI, new String[] { ImageColumns.DATA,
ImageColumns.DATE_ADDED, ImageColumns.SIZE }, null, null, ImageColumns.DATE_ADDED);
if (cursor == null || !cursor.moveToNext())
return new ArrayList<PhotoModel>();
List<PhotoModel> photos = new ArrayList<PhotoModel>();
cursor.moveToLast();
do {
if (cursor.getLong(cursor.getColumnIndex(ImageColumns.SIZE)) > 1024 * 10) {
PhotoModel photoModel = new PhotoModel();
photoModel.setOriginalPath(cursor.getString(cursor.getColumnIndex(ImageColumns.DATA)));
photos.add(photoModel);
}
} while (cursor.moveToPrevious());
return photos;
}(2)、获取全部相冊列表
public List<AlbumModel> getAlbums() {
List<AlbumModel> albums = new ArrayList<AlbumModel>();
Map<String, AlbumModel> map = new HashMap<String, AlbumModel>();
Cursor cursor = resolver.query(Media.EXTERNAL_CONTENT_URI, new String[] { ImageColumns.DATA,
ImageColumns.BUCKET_DISPLAY_NAME, ImageColumns.SIZE }, null, null, null);
if (cursor == null || !cursor.moveToNext())
return new ArrayList<AlbumModel>();
cursor.moveToLast();
AlbumModel current = new AlbumModel("近期照片", 0, cursor.getString(cursor.getColumnIndex(ImageColumns.DATA)), true); // "近期照片"相冊
albums.add(current);
do {
if (cursor.getInt(cursor.getColumnIndex(ImageColumns.SIZE)) < 1024 * 10)
continue; current.increaseCount();
String name = cursor.getString(cursor.getColumnIndex(ImageColumns.BUCKET_DISPLAY_NAME));
if (map.keySet().contains(name))
map.get(name).increaseCount();
else {
AlbumModel album = new AlbumModel(name, 1, cursor.getString(cursor.getColumnIndex(ImageColumns.DATA)));
map.put(name, album);
albums.add(album);
}
} while (cursor.moveToPrevious());
return albums;
}
(3)、获取相应相冊下的照片
public List<PhotoModel> getAlbum(String name) {
Cursor cursor = resolver.query(Media.EXTERNAL_CONTENT_URI, new String[] { ImageColumns.BUCKET_DISPLAY_NAME,
ImageColumns.DATA, ImageColumns.DATE_ADDED, ImageColumns.SIZE }, "bucket_display_name = ?",
new String[] { name }, ImageColumns.DATE_ADDED);
if (cursor == null || !cursor.moveToNext())
return new ArrayList<PhotoModel>();
List<PhotoModel> photos = new ArrayList<PhotoModel>();
cursor.moveToLast();
do {
if (cursor.getLong(cursor.getColumnIndex(ImageColumns.SIZE)) > 1024 * 10) {
PhotoModel photoModel = new PhotoModel();
photoModel.setOriginalPath(cursor.getString(cursor.getColumnIndex(ImageColumns.DATA)));
photos.add(photoModel);
}
} while (cursor.moveToPrevious());
return photos;
}(4)、拍照并及时更新本地相冊
public void photo() {
// Intent openCameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// startActivityForResult(openCameraIntent, TAKE_PICTURE);
try {
File dir = new File(Environment.getExternalStorageDirectory()+ "/" + localTempImgDir);
System.out.println("图片名称："+dir.getPath());
if (!dir.exists()){
dir.mkdirs();
}
localTempImgFileName=System.currentTimeMillis()+".jpg";
Intent intent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
File f = new File(dir, localTempImgFileName);// localTempImgDir和localTempImageFileName是自定义的名字
Uri u = Uri.fromFile(f);
intent.putExtra(MediaStore.Images.Media.ORIENTATION, 0);
intent.putExtra(MediaStore.EXTRA_OUTPUT, u);
startActivityForResult(intent, ResultTag.CODE_TOPHOTO);
} catch (ActivityNotFoundException e) {
Toast.makeText(PublishActivity.this, "没有找到储存文件夹",Toast.LENGTH_LONG).show();
}
}(5)、拍照并及时更新本地相冊
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//相机照相返回
if (requestCode == ResultTag.CODE_TOPHOTO) {
File f = new File(Environment.getExternalStorageDirectory() + "/" + localTempImgDir + "/" + localTempImgFileName); String sdStatus = Environment.getExternalStorageState();
if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) { // 检測sd是否可用
Log.v("TestFile","SD card is not avaiable/writeable right now.");
return;
}
try {
Uri u = Uri.parse(android.provider.MediaStore.Images.Media.insertImage(getContentResolver(),
f.getAbsolutePath(), null, null));
System.out.println("地址为："+f.getAbsolutePath());
MediaScannerConnection.scanFile(this, new String[] { f.getAbsolutePath()}, null, new MediaScannerConnection.OnScanCompletedListener() { public void onScanCompleted(String path, Uri uri) { Log.i("ExternalStorage", "Scanned " + path + ":"); Log.i("ExternalStorage", "-> uri=" + uri); } }); } catch (FileNotFoundException e) {
e.printStackTrace();
} PhotoModel takePhoto = new PhotoModel();
takePhoto.setChecked(true);
takePhoto.setOriginalPath(f.getAbsolutePath());
selectedShow.add(takePhoto);
adapter.notifyDataSetChanged();
}
}
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