package cn.jmessage.android.uikit.multiselectphotos;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Toast;
import java.io.File;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import cn.jmessage.android.uikit.R;
public class AlbumListActivity extends BaseActivity implements AdapterView.OnItemClickListener{
public static final int REQUEST_CODE_SELECT_PICTURE = 6;
public static final int RESULT_CODE_SELECT_PICTURE = 8;
private AlbumListView mAlbumView;
private AlbumListAdapter adapter;
private HashMap<String, List<String>> mGruopMap = new HashMap<String, List<String>>();
private List<ImageBean> list = new ArrayList<ImageBean>();
private final static int SCAN_OK = 1;
private final static int SCAN_ERROR = 2;
private ProgressDialog mProgressDialog;
private final MyHandler myHandler = new MyHandler(this);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.jmui_activity_album_list);
mAlbumView = (AlbumListView) findViewById(R.id.album_view);
mAlbumView.initModule();
mAlbumView.setOnItemClickListener(this);
getImages();
}
/**
* 利用ContentProvider扫描手机中的图片，此方法在运行在子线程中
*/
private void getImages() {
//显示进度条
mProgressDialog = ProgressDialog.show(this, null, this.getString(R.string.loading));
new Thread(new Runnable() {
@Override
public void run() {
Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
ContentResolver mContentResolver = getContentResolver();
//只查询jpeg和png的图片
Cursor mCursor = mContentResolver.query(mImageUri, null,
MediaStore.Images.Media.MIME_TYPE + "=? or "
+ MediaStore.Images.Media.MIME_TYPE + "=?",
new String[] { "image/jpeg", "image/png" }, MediaStore.Images.Media.DATE_MODIFIED);
if (mCursor == null || mCursor.getCount() == 0) {
myHandler.sendEmptyMessage(SCAN_ERROR);
}else {
while (mCursor.moveToNext()) {
//获取图片的路径
String path = mCursor.getString(mCursor
.getColumnIndex(MediaStore.Images.Media.DATA));
try{
//获取该图片的父路径名
String parentName = new File(path).getParentFile().getName();
//根据父路径名将图片放入到mGruopMap中
if (!mGruopMap.containsKey(parentName)) {
List<String> chileList = new ArrayList<String>();
chileList.add(path);
mGruopMap.put(parentName, chileList);
} else {
mGruopMap.get(parentName).add(path);
}
}catch (Exception e) {
e.printStackTrace();
}
}
mCursor.close();
//通知Handler扫描图片完成
myHandler.sendEmptyMessage(SCAN_OK);
}
}
}).start();
}
@Override
protected void onPause() {
mProgressDialog.dismiss();
super.onPause();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_CANCELED) {
return;
}
//得到从PickPictureActivity返回的Intent,通过setResult返回上一个Activity
if (resultCode == RESULT_CODE_SELECT_PICTURE) {
setResult(RESULT_CODE_SELECT_PICTURE, data);
finish();
}
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
List<String> childList = mGruopMap.get(list.get(position).getFolderName());
Intent intent = new Intent();
intent.setClass(AlbumListActivity.this, PickPictureActivity.class);
intent.putExtra("albumName", list.get(position).getFolderName());
intent.putStringArrayListExtra("data", (ArrayList<String>) childList);
startActivityForResult(intent, REQUEST_CODE_SELECT_PICTURE);
}
private static class MyHandler extends Handler {
private final WeakReference<AlbumListActivity> mActivity;
public MyHandler(AlbumListActivity activity) {
mActivity = new WeakReference<AlbumListActivity>(activity);
}
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
AlbumListActivity activity = mActivity.get();
if (activity != null) {
switch (msg.what) {
case SCAN_OK:
activity.mProgressDialog.dismiss();
activity.adapter = new AlbumListAdapter(activity, activity.list = activity
.subGroupOfImage(activity.mGruopMap), activity.mAlbumView.getListView(),
activity.mDensity);
activity.mAlbumView.setAdapter(activity.adapter);
break;
case SCAN_ERROR:
activity.mProgressDialog.dismiss();
Toast.makeText(activity, activity.getString(R.string.sdcard_not_prepare_toast), Toast.LENGTH_SHORT).show();
break;
}
}
}
}
/**
* 组装分组界面GridView的数据源，因为我们扫描手机的时候将图片信息放在HashMap中
* 所以需要遍历HashMap将数据组装成List
*
* @param mGruopMap 相册HashMap
* @return List<ImageBean>
*/
private List<ImageBean> subGroupOfImage(HashMap<String, List<String>> mGruopMap) {
if (mGruopMap.size() == 0) {
return null;
}
List<ImageBean> list = new ArrayList<ImageBean>();
Iterator<Map.Entry<String, List<String>>> it = mGruopMap.entrySet().iterator();
while (it.hasNext()) {
Map.Entry<String, List<String>> entry = it.next();
ImageBean mImageBean = new ImageBean();
String key = entry.getKey();
List<String> value = entry.getValue();
SortPictureList sortList = new SortPictureList();
Collections.sort(value, sortList);
mImageBean.setFolderName(key);
mImageBean.setImageCounts(value.size());
mImageBean.setTopImagePath(value.get(0));//获取该组的第一张图片
list.add(mImageBean);
}
//对相册进行排序，最近修改的相册放在最前面
SortImageBeanComparator sortComparator = new SortImageBeanComparator(list);
Collections.sort(list, sortComparator);
return list;
}
static class SortImageBeanComparator implements Comparator<ImageBean> {
List<ImageBean> list;
public SortImageBeanComparator(List<ImageBean> list){
this.list = list;
}
//根据相册的第一张图片进行排序，最近修改的放在前面
public int compare(ImageBean arg0, ImageBean arg1) {
String path1 = arg0.getTopImagePath();
String path2 = arg1.getTopImagePath();
File f1 = new File(path1);
File f2 = new File(path2);
if (f1.lastModified() < f2.lastModified()) {
return 1;
}else {
return -1;
}
}
}
}
