实现效果：
首先写需要用到的图片数据：时间、文件名、路径等
package com.example.a550211.cd;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* Created by xing on /7/4.
*/
public class ImageTime {
private long time;
private String thumbPath;
private String filePath;
private String fileName;
public String getFileName() {
return fileName;
}
public void setFileName(String fileName) {
this.fileName = fileName;
}
public String getDate() {
return new SimpleDateFormat("yyyy年MM月dd日")
.format(new Date(time*1000L));
}
public long getTime() {
return time;
}
public void setTime(long time) {
this.time = time;
}
public String getThumbPath() {
return thumbPath;
}
public void setThumbPath(String thumbPath) {
this.thumbPath = thumbPath;
}
public String getFilePath() {
return filePath;
}
public void setFilePath(String filePath) {
this.filePath = filePath;
}
}2、实现手机图片的获取，这里使用LoaderCallbacks去获取手机图片，然后保存到date数据中
package com.example.a550211.cd;
import android.app.LoaderManager;
import android.content.CursorLoader;
import android.content.Loader;
import android.database.Cursor;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.trustyapp.gridheaders.TrustyGridGridView;
import java.io.File;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity implements LoaderManager.LoaderCallbacks {
private TrustyGridGridView gvImage;
private ImageAdapter adapter;
private ArrayList fileInfo;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
gvImage = (TrustyGridGridView)findViewById(R.id.gv_image);
adapter = new ImageAdapter(this,fileInfo);
gvImage.setAdapter(adapter);
fileInfo = new ArrayList<>();
getLoaderManager().initLoader(1, null, this);
}
@Override
public Loader onCreateLoader(int id, Bundle args) {
String[] STORE_IMAGES = {
MediaStore.Images.Media.DATA,
MediaStore.Images.Media.DATE_ADDED,
MediaStore.Images.Thumbnails.DATA
};
CursorLoader cursorLoader = new CursorLoader(
this,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
STORE_IMAGES,
null,
null,
null);
return cursorLoader;
}
@Override
public void onLoadFinished(Loader loader, Cursor cursor) {
if (cursor.moveToNext()){
int thumbPathIndex = cursor.getColumnIndex(MediaStore.Images.Thumbnails.DATA);
int timeIndex = cursor.getColumnIndex(MediaStore.Images.Media.DATE_ADDED);
int pathIndex = cursor.getColumnIndex(MediaStore.Images.Media.DATA);
do{
ImageTime fi = new ImageTime();
String thumbPath = cursor.getString(thumbPathIndex);
Long date = cursor.getLong(timeIndex);
String filepath = cursor.getString(pathIndex);
File f = new File(filepath);
fi.setTime(date);
fi.setThumbPath(thumbPath);
fi.setFilePath(filepath);
fi.setFileName(f.getName());
fileInfo.add(fi);
}while (cursor.moveToNext());
}
adapter.setData(fileInfo);
adapter.notifyDataSetChanged();
}
@Override
public void onLoaderReset(Loader loader) {
}
}3、adapter中显示数据实现，这里使用到了TrustyGridSimpleAdapter，这里面有两个方法getHeaderId和getHeaderView具体功能实现下面代码。
package com.example.a550211.cd;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.bumptech.glide.signature.MediaStoreSignature;
import com.trustyapp.gridheaders.TrustyGridSimpleAdapter;
import java.io.File;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
/**
* Created by xing on /7/11.
*/
public class ImageAdapter extends BaseAdapter implements TrustyGridSimpleAdapter {
private Context mContext;
private ArrayList fileInfo;
public ImageAdapter(Context mContext,ArrayList fileInfo) {
this.mContext = mContext;
this.fileInfo =fileInfo;
}
public void setData(ArrayList fileInfo){
this.fileInfo = fileInfo;
}
@Override
public int getCount() {
int count = 0;
if (fileInfo!=null && fileInfo.size()>0){
count = fileInfo.size();
}
return count;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
class ViewHolder{
ImageView ivImage;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
if (convertView==null){
viewHolder = new ViewHolder();
convertView = View.inflate(mContext,R.layout.item_image,null);
viewHolder.ivImage = (ImageView)convertView.findViewById(R.id.iv_image);
convertView.setTag(viewHolder);
}else {
viewHolder = (ViewHolder)convertView.getTag();
}
if (fileInfo!=null && fileInfo.size()>0) {
File file = new File(fileInfo.get(position).getFilePath());
Glide.with(mContext).load(file).asBitmap().dontAnimate().centerCrop()
.signature(new MediaStoreSignature("image/jpeg", file.lastModified(), 0))
.into(viewHolder.ivImage);
}
return convertView;
}
class HeaderViewHolder {
public TextView tvTimeHeader;
}
@Override
public View getHeaderView(int position, View convertView, ViewGroup viewGroup) {
HeaderViewHolder mHeadViewHolder = null;
if (convertView==null){
mHeadViewHolder = new HeaderViewHolder();
convertView = View.inflate(mContext,R.layout.item_time_header,null);
mHeadViewHolder.tvTimeHeader = (TextView) convertView.findViewById(R.id.tv_time_header);
convertView.setTag(mHeadViewHolder);
}else {
mHeadViewHolder = (HeaderViewHolder)convertView.getTag();
}
mHeadViewHolder.tvTimeHeader.setText(fileInfo.get(position).getDate());
return convertView;
}
@Override
public long getHeaderId(int i) {
// File file = new File(fileInfo.get(i).getFilePath());
return getTimeId(fileInfo.get(i).getDate());
// return getTimeId(strToDateLong(file.lastModified()));
}
public long getTimeId(String date) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
Date mDate = null;
try {
mDate = sdf.parse(date);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return mDate.getTime();
}
public String strToDateLong(long time) {
Date date = new Date(time);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
return sdf.format(date);
}
}实现的三个布局文件，都比较简单
xmlns:tools="/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.a550211.cd.MainActivity">
android:id="@+id/gv_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:horizontalSpacing="3dp"
android:numColumns="4"
android:padding="3dp"
android:verticalSpacing="3dp">
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
android:id="@+id/iv_image"
android:layout_width="104dp"
android:layout_height="104dp"
android:layout_centerInParent="true"
android:scaleType="fitXY"
/>
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
android:id="@+id/tv_time_header"
android:layout_width="wrap_content"
android:layout_height="34dp"
android:layout_marginLeft="17dp"
android:text="fdsfsdfsdf"
android:gravity="center"
android:textColor="#000000"
android:textSize="15sp" />
需要使用到的权限：
最后记得添加jar包，下载路径：
/download/u011324501/9895566
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