使用方式
github链接: https://github.com/cmcy/media-selector.
gradle依赖
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
dependencies {
// 项目使用的AndroidX 使用这个
implementation 'com.github.cmcy:media-selector:2.0.4'
// 项目使用的 Android Support Library 使用这个
implementation 'com.github.cmcy:media-selector:1.1.1'
}
具体使用方式：
在AndroidManifest中配置activity
第一个是选择的界面，第二个是预览的界面，第三个是图片剪切的界面
如果项目没有配置FileProvider，则需要配置一下
android 10.0需要在application加上android:requestLegacyExternalStorage="true"
开始使用：
MediaSelector.get()
.showCamera(true)//默认显示，可以不用设置
.setSelectMode(MediaSelector.MODE_MULTI)//默认多选
.setMaxCount(20)//默认最多选择5张，设置单选后此设置无效
.setMediaType(MediaSelector.PICTURE)//默认选择图片
.setDefaultList(imageAdapter.getSelect())//默认选中的图片/视频
.setListener(new MediaSelectorListener())//选择完成的回调, （可以设置回调或者用onActivityResult方式接收）
.jump(this);
使用回调的方式接收返回图片/视频
.setListener(new MediaSelector.MediaSelectorListener() {
@Override
public void onMediaResult(List resultList) {
//选择的图片/视频 resultList
}
})
使用onActivityResult方式接收返回图片/视频
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == MediaSelector.REQUEST_IMAGE && resultCode == RESULT_OK){
List resultList = data.getStringArrayListExtra(MediaSelector.EXTRA_RESULT);
//选择图片图片视频 resultList
}
}
效果图
image
image
image
具体原理
使用LoaderManager来加载本地图片
获取图片
//图片加载器
private LoaderManager.LoaderCallbacks mLoaderCallback = new LoaderManager.LoaderCallbacks() {
private final String[] IMAGE_PROJECTION = {
MediaStore.Images.Media.DATA,
MediaStore.Images.Media.DISPLAY_NAME,
MediaStore.Images.Media.DATE_ADDED,
MediaStore.Images.Thumbnails._ID };
@Override
public Loader onCreateLoader(int id, Bundle args) {
if(id == 0) {
CursorLoader cursorLoader = new CursorLoader(mContext,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_PROJECTION,
null, null, IMAGE_PROJECTION[2] + " DESC");
break;
return cursorLoader;
}
return null;
}
@Override
public void onLoadFinished(Loader loader, Cursor data) {
if (data != null) {
final List images = new ArrayList();
int count = data.getCount();
if (count > 0) {
data.moveToFirst();
String[] currentPro = IMAGE_PROJECTION;
do{
String path = data.getString(data.getColumnIndexOrThrow(currentPro[0]));
String name = data.getString(data.getColumnIndexOrThrow(currentPro[1]));
long dateTime = data.getLong(data.getColumnIndexOrThrow(currentPro[2]));
int id = data.getInt(data.getColumnIndexOrThrow(currentPro[3]));
Image image = new Image(path, name, dateTime, "", id);
images.add(image);
}while(data.moveToNext());
//images 图片list
}
}
}
@Override
public void onLoaderReset(Loader loader) {
}
};
获取视频
视频的获取和图片的获取是类似的，只需要把MediaStore.Images.Media换成MediaStore.Video.Media就可以了
//视频加载器
private LoaderManager.LoaderCallbacks mLoaderCallback = new LoaderManager.LoaderCallbacks() {
private final String[] VIDEO_PROJECTION = {
MediaStore.Video.Media.DATA,
MediaStore.Video.Media.DISPLAY_NAME,
MediaStore.Video.Media.DATE_ADDED,
MediaStore.Video.Thumbnails._ID };
@Override
public Loader onCreateLoader(int id, Bundle args) {
if(id == mediaView.getLoaderModel()) {
CursorLoader cursorLoader = new CursorLoader(mContext,
MediaStore.Video.Media.EXTERNAL_CONTENT_URI, null,
null, null, VIDEO_PROJECTION[2] + " DESC");
return null;
}
@Override
public void onLoadFinished(Loader loader, Cursor data) {
if (data != null) {
final List images = new ArrayList();
int count = data.getCount();
if (count > 0) {
data.moveToFirst();
String[] currentPro = VIDEO_PROJECTION;
do{
String path = data.getString(data.getColumnIndexOrThrow(currentPro[0]));
String name = data.getString(data.getColumnIndexOrThrow(currentPro[1]));
long dateTime = data.getLong(data.getColumnIndexOrThrow(currentPro[2]));
int id = data.getInt(data.getColumnIndexOrThrow(currentPro[3]));
Image image = new Image(path, name, dateTime, "", id);
images.add(image);
}while(data.moveToNext());
//images 视频list
}
}
}
@Override
public void onLoaderReset(Loader loader) {
}
};
然后开始加载图片/视频：
getSupportLoaderManager().initLoader(mediaView.getLoaderModel(), null, mLoaderCallback);
附上Image 实体类：
public class Image implements Serializable
{
public String path;
public String name;
public long time;
public int id;
public String thumbPath;
public Bitmap bitmap;
public Image(String path, String name, long time, String thumbPath, int id){
this.path = path;
this.name = name;
this.time = time;
this.thumbPath = thumbPath;
this.id = id;
}
@Override
public boolean equals(Object o) {
try {
Image other = (Image) o;
return this.path.equalsIgnoreCase(other.path);
}catch (ClassCastException e){
e.printStackTrace();
}
return super.equals(o);
}
}
如有问题欢迎留言或者上github 在issues上提问