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