android 按时间显示图片

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 2017/7/4.
 */

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 2017/7/11.
 */

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

需要使用到的权限：

最后记得添加jar包，下载路径： http://download.csdn.net/download/u011324501/9895566

代码下载地址：http://download.csdn.net/download/u011324501/9895782