Android仿微信朋友圈图片选择器

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package com.custompictureselect;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.ImageView;

import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.QueueProcessingType;

import java.util.ArrayList;

public class MainActivity extends Activity {

 private GridView gridview;

 private EditText editText ;

 private GridAdapter gridAdapter;

 private Context context ;

 private static final int REQUEST_PICK = 0;


 //存放所有选择的照片
 private ArrayList allSelectedPicture = new ArrayList();

 //存放从选择界面选择的照片
 private ArrayList selectedPicture = new ArrayList();
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 context = this ;

 //设置在activity启动的时候输入法默认是不开启的
 getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);

 ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(this)
  .threadPriority(Thread.NORM_PRIORITY - 2)//设置当前线程的优先级
  .denyCacheImageMultipleSizesInMemory()
  .diskCacheFileNameGenerator(new Md5FileNameGenerator())//使用MD5对UIL进行加密命名
  .diskCacheSize(100 * 1024 * 1024)//50 Mb sd卡(本地)缓存的最大值
  .diskCacheFileCount(300)// 可以缓存的文件数量
  .tasksProcessingOrder(QueueProcessingType.LIFO)//后进先出
  .build();

 //初始化操作
 ImageLoader.getInstance().init(config);

 initView();
 }

 /**
 * 初始化视图
 */
 private void initView(){

 editText = (EditText) findViewById(R.id.editText);

 //显示图片
 gridview = (GridView) findViewById(R.id.gridview);

 gridAdapter = new GridAdapter();

 gridview.setAdapter(gridAdapter);
 }

 /**
 * 展示图片的GridView的适配器
 */
 class GridAdapter extends BaseAdapter {

 public LayoutInflater layoutInflater = LayoutInflater.from(context);
 @Override
 public int getCount() {
  return allSelectedPicture.size()+ 1;
 }

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

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

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

  ViewHolder holder = null ;
  if (convertView == null) {
  holder = new ViewHolder();
  convertView = layoutInflater.inflate(R.layout.childgrid_item, null);

  holder.image = (ImageView) convertView.findViewById(R.id.child_iv);
  holder.btn = (Button) convertView.findViewById(R.id.child_delete);

  holder.image.setScaleType(ImageView.ScaleType.CENTER_CROP);

  convertView.setTag(holder);
  }
  else{
  holder = (ViewHolder) convertView.getTag();
  }

  if (position == allSelectedPicture.size()) {
  holder.image.setImageBitmap(BitmapFactory.decodeResource(
   context.getResources(), R.drawable.icon_addpic));
  holder.btn.setVisibility(View.GONE);

  holder.image.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
   selectClick();
   }
  });
  if (position == 3) {
   holder.image.setVisibility(View.GONE);
  }
  } else {
  ImageLoader.getInstance().displayImage("file://" + allSelectedPicture.get(position),
   holder.image);

  holder.btn.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
   //点击后移除图片
   allSelectedPicture.remove(position);

   //更新UI
   gridview.setAdapter(gridAdapter);
   }
  });

  }
  return convertView;
 }
 }

 public class ViewHolder {
 public ImageView image;
 public Button btn ;
 }

 private void selectClick(){
 Intent intent = new Intent();
 intent.setClass(MainActivity.this , SelectPictureActivity.class);

 Bundle bundle = new Bundle();
 bundle.putStringArrayList("allSelectedPicture", allSelectedPicture);
 intent.putExtras(bundle);

 if(allSelectedPicture.size()< 3){
  startActivityForResult(intent, REQUEST_PICK);
 }
 }

 @SuppressWarnings("unchecked")
 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {

 if (resultCode == RESULT_OK) {
  selectedPicture = (ArrayList) data.getSerializableExtra(SelectPictureActivity.INTENT_SELECTED_PICTURE);
  for(String str : selectedPicture){
  if(!allSelectedPicture.contains(str)){
   allSelectedPicture.add(str);

   gridview.setAdapter(gridAdapter);
  }
  }
 }
 }
}

package com.custompictureselect;

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;

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

public class SelectPictureActivity extends Activity {

 // 最多选择图片的个数
 private static int MAX_NUM = 3;
 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 tmpDir = new HashMap();
 private ArrayList mDirPaths = new ArrayList();

 /**
 * 具体下载图片，缓存图片，显示图片的具体执行类，它有两个具体的方法displayImage(...)、loadImage(...)，
 */
 private ImageLoader loader;

 /**
 * 用于指导每一个Imageloader根据网络图片的状态（空白、下载错误、正在下载）显示对应的图片，
 * 是否将缓存加载到磁盘上，下载完后对图片进行怎么样的处理。
 */
 private DisplayImageOptions options;

 private ContentResolver mContentResolver;

 //选择按钮和完成按钮
 private Button btn_select, btn_ok;

 //图片文件的列表
 private ListView listview;

 private FolderAdapter folderAdapter;

 private ImageFloder imageAll, currentImageFolder;


 //已选择的图片
 private ArrayList selectedPicture = new ArrayList();

 private String cameraPath = null;

 private int isExisted ;

 private ArrayList existedPictureList = new ArrayList();

 @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, 3);

 Bundle bundle = getIntent().getExtras();
 existedPictureList = bundle.getStringArrayList("allSelectedPicture");
 isExisted = existedPictureList.size();

 context = this;
 mContentResolver = getContentResolver();
 loader = ImageLoader.getInstance();

 options = new DisplayImageOptions.Builder()
  .showImageOnLoading(R.drawable.ic_launcher)//设置图片在下载期间显示的图片

  .showImageForEmptyUri(R.drawable.ic_launcher)//设置图片Uri为空或是错误的时候显示的图片

  .showImageOnFail(R.drawable.ic_launcher)//设置图片加载/解码过程中错误时候显示的图片

  .cacheInMemory(true)//设置下载的图片是否缓存在内存中

  .cacheOnDisk(true) //设置下载的图片是否缓存在SD卡中

  .considerExifParams(true)//启用EXIF和JPEG图像格式

  .imageScaleType(ImageScaleType.EXACTLY)//图像将完全按比例缩小的目标大小

  .bitmapConfig(Bitmap.Config.RGB_565)//设置图片的解码类型

  .build();

 initView();
 }

 /**
 * 点击"所有图片"按钮事件
 * @param v
 */
 public void select(View v) {
 if (listview.getVisibility() == View.VISIBLE) {
  hideListAnimation();
 } else {
  listview.setVisibility(View.VISIBLE);
  showListAnimation();
  folderAdapter.notifyDataSetChanged();
 }
 }

 /**
 * 设置ListView的移动的动画效果
 */
 public void showListAnimation() {
 TranslateAnimation ta = new TranslateAnimation(1, 0f, 1, 0f, 1, 1f, 1, 0f);
 ta.setDuration(200);
 listview.startAnimation(ta);
 }

 /**
 * 隐藏ListView的移动的动画效果
 */
 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(View.INVISIBLE);
  }
 });
 }

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

 /**
 * 视图初始化
 */
 private void initView() {
 imageAll = new ImageFloder();
 imageAll.setDir(getResources().getString(R.string.dir_all_pictures));
 currentImageFolder = imageAll;
 mDirPaths.add(imageAll);

 btn_ok = (Button) findViewById(R.id.btn_ok);
 btn_ok.setText(getResources().getString(R.string.complete) + isExisted + "/" + MAX_NUM);

 btn_select = (Button) findViewById(R.id.btn_select);

 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);
  hideListAnimation();
  adapter.notifyDataSetChanged();
  btn_select.setText(currentImageFolder.getName());
  }
 });
 getThumbnail();
 }

 /**
 * 使用相机拍照
 */
 protected void goCamare() {
 if (isExisted + selectedPicture.size() + 1 > MAX_NUM) {
  Toast.makeText(context, getResources().getString(R.string.chose_at_most) + MAX_NUM + getResources().getString(R.string.sheet), 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
 */
 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) {
 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) {

  //自定义的一个类用来缓存convertview
  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) {//拍摄图片
  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);

  //显示图片
  loader.displayImage("file://" + item.path, holder.iv, options);

  //是否选中
  boolean isSelected = (selectedPicture.contains(item.path) || existedPictureList.contains(item.path));
  holder.checkBox.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {

   //若选中的图片多于所设置的上限，不再加入
   if (!v.isSelected() && isExisted + selectedPicture.size() + 1 > MAX_NUM) {
    Toast.makeText(context, getResources().getString(R.string.chose_at_most) + MAX_NUM + getResources().getString(R.string.sheet), Toast.LENGTH_SHORT).show();
    return;
   }

   //二次选择，移除
   if (selectedPicture.contains(item.path)|| existedPictureList.contains(item.path)) {
    selectedPicture.remove(item.path);
   } else {

    //加入数组
    selectedPicture.add(item.path);
   }

   btn_ok.setEnabled(selectedPicture.size()>0);
   btn_ok.setText(getResources().getString(R.string.complete) + (selectedPicture.size()+ isExisted) + "/" + MAX_NUM);

   v.setSelected(selectedPicture.contains(item.path)|| existedPictureList.contains(item.path));
   }
  });

  holder.checkBox.setSelected(isSelected);
  }

  return convertView;
 }
 }

 //自定义的一个类用来缓存convertview
 class ViewHolder {
 ImageView iv;
 Button checkBox;
 }

 /**
 * 所有图片
 */
 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() + getResources().getString(R.string.sheet));
  holder.id_dir_item_name.setText(item.getName());

  holder.choose.setVisibility(currentImageFolder == item ? View.VISIBLE : View.GONE);
  return convertView;
 }
 }

 //自定义的一个类用来缓存convertview
 class FolderViewHolder {
 ImageView id_dir_item_image;
 ImageView choose;
 TextView id_dir_item_name;
 TextView id_dir_item_count;
 }

 /**
 * 获取缩略图
 */
 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");

 if (mCursor.moveToFirst()) {
  int _date = mCursor.getColumnIndex(MediaStore.Images.Media.DATA);
  do {

  // 获取图片的路径
  String path = mCursor.getString(_date);
  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);
   tmpDir.put(dirPath, mDirPaths.indexOf(imageFloder));
  } else {
   imageFloder = mDirPaths.get(tmpDir.get(dirPath));
  }

  imageFloder.images.add(new ImageItem(path));
  } while (mCursor.moveToNext());
 }

 mCursor.close();

 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 images = new ArrayList();

 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;
 }
 }

}