Android仿微信选择照片，拍照

效果图：

使用的方法简单粗暴，直接利用ContentResolver查询系统媒体数据库，拿到每张图片的实际路径，然后得到他们所在的目录，将其按目录分类（原来测试的是拿到缩略图，但是在模拟器上测试可以，我的手机上一直报找不到缩略图的异常，可能是垃圾手机的原因，不过微信也是没用那缩略图）
我把代码都封装到一个Activity中了（SelectPictureActivity.java），下次再使用直接复制就可以用，布局样式需要在layout中修改

使用
startActivityForResult(new Intent(this, SelectPictureActivity.class), REQUEST_PICK);

然后选择完成返回选择的图片路径的list

@SuppressWarnings("unchecked")
  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
      // super.onActivityResult(requestCode, resultCode, data);
      if (resultCode == RESULT_OK) {
          selectedPicture = (ArrayList<String>) data
                  .getSerializableExtra(SelectPictureActivity.INTENT_SELECTED_PICTURE);
          adapter.notifyDataSetChanged();
      }
  }

完整的代码：

package com.zyh.selectpicture;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.Window;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.TranslateAnimation;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;

public class SelectPictureActivity extends Activity {

    /**
     * 最多选择图片的个数
     */
    private static int MAX_NUM = 6;
    private static final int TAKE_PICTURE = 520;

    public static final String INTENT_MAX_NUM = "intent_max_num";
    public static final String INTENT_SELECTED_PICTURE = "intent_selected_picture";

    private Context context;
    private GridView gridview;
    private PictureAdapter adapter;
    /**
     * 临时的辅助类，用于防止同一个文件夹的多次扫描
     */
    private HashMap<String, Integer> tmpDir = new HashMap<String, Integer>();
    private ArrayList<ImageFloder> mDirPaths = new ArrayList<ImageFloder>();

    private ImageLoader loader;
    private DisplayImageOptions options;
    private ContentResolver mContentResolver;
    private Button btn_select, btn_ok;
    private ListView listview;
    private FolderAdapter folderAdapter;
    private ImageFloder imageAll, currentImageFolder;

    /**
     * 已选择的图片
     */
    private ArrayList<String> selectedPicture = new ArrayList<String>();
    private String cameraPath = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_select_picture);
        MAX_NUM = getIntent().getIntExtra(INTENT_MAX_NUM, 6);
        context = this;
        mContentResolver = getContentResolver();
        loader = ImageLoader.getInstance();
        options = new DisplayImageOptions.Builder().showImageOnLoading(R.drawable.ic_launcher)
                .showImageForEmptyUri(R.drawable.ic_launcher).showImageOnFail(R.drawable.ic_launcher)
                .cacheInMemory(true).cacheOnDisk(true).considerExifParams(true)
                .imageScaleType(ImageScaleType.EXACTLY).bitmapConfig(Bitmap.Config.RGB_565).build();
        initView();
    }

    public void select(View v) {
        if (listview.getVisibility() == 0) {
            hideListAnimation();
        } else {
            listview.setVisibility(0);
            showListAnimation();
            folderAdapter.notifyDataSetChanged();
        }
    }

    public void showListAnimation() {
        TranslateAnimation ta = new TranslateAnimation(1, 0f, 1, 0f, 1, 1f, 1, 0f);
        ta.setDuration(200);
        listview.startAnimation(ta);
    }

    public void hideListAnimation() {
        TranslateAnimation ta = new TranslateAnimation(1, 0f, 1, 0f, 1, 0f, 1, 1f);
        ta.setDuration(200);
        listview.startAnimation(ta);
        ta.setAnimationListener(new AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {
            }

            @Override
            public void onAnimationRepeat(Animation animation) {
            }

            @Override
            public void onAnimationEnd(Animation animation) {
                listview.setVisibility(8);
            }
        });
    }

    /**
     * 点击完成按钮
     *
     * @version 1.0
     * @author zyh
     * @param v
     */
    public void ok(View v) {
        Intent data = new Intent();
        data.putExtra(INTENT_SELECTED_PICTURE, selectedPicture);
        setResult(RESULT_OK, data);
        this.finish();
    }

    private void initView() {
        imageAll = new ImageFloder();
        imageAll.setDir("/所有图片");
        currentImageFolder = imageAll;
        mDirPaths.add(imageAll);
        btn_ok = (Button) findViewById(R.id.btn_ok);
        btn_select = (Button) findViewById(R.id.btn_select);
        btn_ok.setText("完成0/" + MAX_NUM);

        gridview = (GridView) findViewById(R.id.gridview);
        adapter = new PictureAdapter();
        gridview.setAdapter(adapter);

        gridview.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (position == 0) {
                    goCamare();
                }
            }
        });

        listview = (ListView) findViewById(R.id.listview);
        folderAdapter = new FolderAdapter();
        listview.setAdapter(folderAdapter);
        listview.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                currentImageFolder = mDirPaths.get(position);
                Log.d("zyh", position + "-------" + currentImageFolder.getName() + "----"
                        + currentImageFolder.images.size());
                hideListAnimation();
                adapter.notifyDataSetChanged();
                btn_select.setText(currentImageFolder.getName());
            }
        });
        getThumbnail();
    }

    /**
     * 使用相机拍照
     *
     * @version 1.0
     * @author zyh
     */
    protected void goCamare() {
        if (selectedPicture.size() + 1 > MAX_NUM) {
            Toast.makeText(context, "最多选择" + MAX_NUM + "张", Toast.LENGTH_SHORT).show();
            return;
        }

        Intent openCameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        Uri imageUri = getOutputMediaFileUri();
        openCameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
        startActivityForResult(openCameraIntent, TAKE_PICTURE);
    }

    /**
     * 用于拍照时获取输出的Uri
     *
     * @version 1.0
     * @author zyh
     * @return
     */
    protected Uri getOutputMediaFileUri() {
        File mediaStorageDir = new File(
                Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "Night");
        if (!mediaStorageDir.exists()) {
            if (!mediaStorageDir.mkdirs()) {
                Log.d("MyCameraApp", "failed to create directory");
                return null;
            }
        }
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        File mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg");
        cameraPath = mediaFile.getAbsolutePath();
        return Uri.fromFile(mediaFile);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK && cameraPath != null) {
            selectedPicture.add(cameraPath);
            Intent data2 = new Intent();
            data2.putExtra(INTENT_SELECTED_PICTURE, selectedPicture);
            setResult(RESULT_OK, data2);
            this.finish();
        }
    }

    public void back(View v) {
        onBackPressed();
    }

    class PictureAdapter extends BaseAdapter {
        @Override
        public int getCount() {
            return currentImageFolder.images.size() + 1;
        }

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

            ViewHolder holder = null;
            if (convertView == null) {
                convertView = View.inflate(context, R.layout.grid_item_picture, null);
                holder = new ViewHolder();
                holder.iv = (ImageView) convertView.findViewById(R.id.iv);
                holder.checkBox = (Button) convertView.findViewById(R.id.check);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }
            if (position == 0) {
                holder.iv.setImageResource(R.drawable.pickphotos_to_camera_normal);
                holder.checkBox.setVisibility(View.INVISIBLE);
            } else {
                position = position - 1;
                holder.checkBox.setVisibility(View.VISIBLE);
                final ImageItem item = currentImageFolder.images.get(position);
                loader.displayImage("file://" + item.path, holder.iv, options);
                boolean isSelected = selectedPicture.contains(item.path);
                holder.checkBox.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (!v.isSelected() && selectedPicture.size() + 1 > MAX_NUM) {
                            Toast.makeText(context, "最多选择" + MAX_NUM + "张", Toast.LENGTH_SHORT).show();
                            return;
                        }
                        if (selectedPicture.contains(item.path)) {
                            selectedPicture.remove(item.path);
                        } else {
                            selectedPicture.add(item.path);
                        }
                        btn_ok.setText("完成" + selectedPicture.size() + "/" + MAX_NUM);
                        v.setSelected(selectedPicture.contains(item.path));
                    }
                });
                holder.checkBox.setSelected(isSelected);
            }
            return convertView;
        }
    }

    class ViewHolder {
        ImageView iv;
        Button checkBox;
    }

    class FolderAdapter extends BaseAdapter {

        @Override
        public int getCount() {
            return mDirPaths.size();
        }

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            FolderViewHolder holder = null;
            if (convertView == null) {
                convertView = View.inflate(context, R.layout.list_dir_item, null);
                holder = new FolderViewHolder();
                holder.id_dir_item_image = (ImageView) convertView.findViewById(R.id.id_dir_item_image);
                holder.id_dir_item_name = (TextView) convertView.findViewById(R.id.id_dir_item_name);
                holder.id_dir_item_count = (TextView) convertView.findViewById(R.id.id_dir_item_count);
                holder.choose = (ImageView) convertView.findViewById(R.id.choose);
                convertView.setTag(holder);
            } else {
                holder = (FolderViewHolder) convertView.getTag();
            }
            ImageFloder item = mDirPaths.get(position);
            loader.displayImage("file://" + item.getFirstImagePath(), holder.id_dir_item_image, options);
            holder.id_dir_item_count.setText(item.images.size() + "张");
            holder.id_dir_item_name.setText(item.getName());
            holder.choose.setVisibility(currentImageFolder == item ? 0 : 8);
            return convertView;
        }
    }

    class FolderViewHolder {
        ImageView id_dir_item_image;
        ImageView choose;
        TextView id_dir_item_name;
        TextView id_dir_item_count;
    }

    /**
     * 得到缩略图
     */
    private void getThumbnail() {
        Cursor mCursor = mContentResolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                new String[] { MediaStore.Images.ImageColumns.DATA }, "", null,
                MediaStore.MediaColumns.DATE_ADDED + " DESC");
        Log.e("TAG", mCursor.getCount() + "");
        if (mCursor.moveToFirst()) {
            int _date = mCursor.getColumnIndex(MediaStore.Images.Media.DATA);
            do {
                // 获取图片的路径
                String path = mCursor.getString(_date);
                Log.e("TAG", path);
                imageAll.images.add(new ImageItem(path));
                // 获取该图片的父路径名
                File parentFile = new File(path).getParentFile();
                if (parentFile == null) {
                    continue;
                }
                ImageFloder imageFloder = null;
                String dirPath = parentFile.getAbsolutePath();
                if (!tmpDir.containsKey(dirPath)) {
                    // 初始化imageFloder
                    imageFloder = new ImageFloder();
                    imageFloder.setDir(dirPath);
                    imageFloder.setFirstImagePath(path);
                    mDirPaths.add(imageFloder);
                    Log.d("zyh", dirPath + "," + path);
                    tmpDir.put(dirPath, mDirPaths.indexOf(imageFloder));
                } else {
                    imageFloder = mDirPaths.get(tmpDir.get(dirPath));
                }
                imageFloder.images.add(new ImageItem(path));
            } while (mCursor.moveToNext());
        }
        mCursor.close();
        for (int i = 0; i < mDirPaths.size(); i++) {
            ImageFloder f = mDirPaths.get(i);
            Log.d("zyh", i + "-----" + f.getName() + "---" + f.images.size());
        }
        tmpDir = null;
    }

    class ImageFloder {
        /**
         * 图片的文件夹路径
         */
        private String dir;

        /**
         * 第一张图片的路径
         */
        private String firstImagePath;
        /**
         * 文件夹的名称
         */
        private String name;

        public List<ImageItem> images = new ArrayList<ImageItem>();

        public String getDir() {
            return dir;
        }

        public void setDir(String dir) {
            this.dir = dir;
            int lastIndexOf = this.dir.lastIndexOf("/");
            this.name = this.dir.substring(lastIndexOf);
        }

        public String getFirstImagePath() {
            return firstImagePath;
        }

        public void setFirstImagePath(String firstImagePath) {
            this.firstImagePath = firstImagePath;
        }

        public String getName() {
            return name;
        }

    }

    class ImageItem {
        String path;

        public ImageItem(String p) {
            this.path = p;
        }
    }

}

源码下载：https://github.com/18236887539/SelectPicture