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Android仿微信朋友圈圖片選擇器

 更新時(shí)間：2017年12月28日 08:47:10   作者：維智  
這篇文章主要為大家詳細(xì)介紹了Android仿微信朋友圈附加圖片功能，朋友圈圖片選擇器，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

最近做開發(fā)需要解決一個(gè)模仿微信朋友圈附加圖片的功能，具體要求如下：

（1）從手機(jī)中最多選擇3張圖片，可拍照上傳；
（2）選擇的圖片可以點(diǎn)擊移除然后再添加新圖片；
（3）可以在手機(jī)包含圖片的各個(gè)文件夾中隨意選擇等。

本博客主要實(shí)現(xiàn)的是以上功能，其他諸如主界面布局、各種控件添加和提交功能等旨在說明問題，只做了簡(jiǎn)單處理，重點(diǎn)在圖片選擇添加部分。該功能的實(shí)現(xiàn)主要引用了一個(gè)圖片加載的開源框架universal-image-loader。

其中截圖如下：

 

 

 

為了不過于冗余，過濾了部分布局文件和資源文件，在這里提供源碼下載地址，有興趣的讀者可以下載觀看（注：我使用的 Android Studio 1.4 , SdkVersion 為23 ，在小米note【Android 4.4 】上調(diào)試）。

下面開始我們的主要內(nèi)容：

主界面布局activity_main.xml (主要使用一個(gè)GridView實(shí)現(xiàn))：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
>

 <RelativeLayout
 android:layout_width="fill_parent"
 android:background="#f7614d"
 android:paddingLeft="37px"
 android:layout_height="70dp">
 <TextView
  android:layout_centerInParent="true"
  android:text="附圖案例"
  android:textSize="25sp"
  android:textColor="#ffffff"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  />
 </RelativeLayout>

 <View
 android:layout_width="fill_parent"
 android:layout_height="20dp"
 android:background="#00000000"/>

 <LinearLayout
 android:paddingLeft="10dp"
 android:paddingRight="10dp"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:orientation="vertical">

 <TextView
  android:id="@+id/tv11"
  android:layout_alignParentLeft="true"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="文字描述"
  android:textSize="23sp"
  />
 <View
  android:layout_width="fill_parent"
  android:layout_height="10dp"
  android:background="#00000000"/>

 <EditText
  android:paddingTop="20dp"
  android:background="@drawable/bg_et"
  android:id="@+id/editText"
  android:inputType="textMultiLine"
  android:gravity="left|top"
  android:padding="5dp"
  android:maxLength="300"
  android:hint="客官，寫點(diǎn)評(píng)論吧..."
  android:textColorHint="#808080"
  android:textSize="20sp"
  android:layout_width="fill_parent"
  android:layout_height="150dp" />

 <View
  android:layout_width="fill_parent"
  android:layout_height="20dp"
  android:background="#00000000"/>
 <TextView
  android:id="@+id/tv"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="附加圖片"
  android:textSize="23sp" />
 <View
  android:layout_width="fill_parent"
  android:layout_height="10dp"
  android:background="#00000000"/>

 <GridView
  android:id="@+id/gridview"
  android:layout_width="fill_parent"
  android:layout_height="200dp"

  android:horizontalSpacing="2dp"
  android:verticalSpacing="5dp"
  android:scrollbars="none"
  android:listSelector="#00000000"
  android:numColumns="3" >
 </GridView>

 <Button
  android:id="@+id/submit_btn"
  android:layout_width="wrap_content"
  android:layout_height="50dp"
  android:layout_centerInParent="true"
  android:background="@drawable/bg_submit"
  android:text="提交"
  android:textSize="23sp"
  android:textColor="#FFFFFF"/>
 </LinearLayout>

</LinearLayout>

圖片選擇界面布局activity_select_picture.xml :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical" >

 <RelativeLayout
 android:layout_width="match_parent"
 android:layout_height="48dp"
 android:background="#c000" >

 <Button
  android:id="@+id/btn_back"
  android:layout_width="24dp"
  android:layout_height="24dp"
  android:layout_alignParentLeft="true"
  android:layout_centerVertical="true"
  android:layout_margin="8dp"
  android:background="@drawable/ic_back_light"
  android:onClick="back" />

 <TextView
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_centerVertical="true"
  android:layout_marginLeft="8dp"
  android:layout_toRightOf="@+id/btn_back"
  android:text="圖片"
  android:textColor="#ffffff"
  android:textSize="16sp" />

 <Button
  android:id="@+id/btn_ok"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_alignParentRight="true"
  android:layout_centerVertical="true"
  android:layout_marginRight="8dp"
  android:background="@null"
  android:gravity="center"
  android:onClick="ok"
  android:text="完成"
  android:textColor="#fff"
  android:textSize="14sp" />
 </RelativeLayout>

 <RelativeLayout
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="#d000" >

 <GridView
  android:id="@+id/gridview"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:layout_above="@+id/bottom"
  android:horizontalSpacing="3dp"
  android:numColumns="3"
  android:scrollbars="none"
  android:verticalSpacing="5dp" >
 </GridView>

 <RelativeLayout
  android:id="@+id/bottom"
  android:layout_width="match_parent"
  android:layout_height="48dp"
  android:layout_alignParentBottom="true"
  android:background="#c000" >

  <Button
  android:id="@+id/btn_select"
  android:layout_width="wrap_content"
  android:layout_height="match_parent"
  android:layout_alignParentLeft="true"
  android:layout_centerVertical="true"
  android:layout_margin="8dp"
  android:background="@drawable/spinner_bg"
  android:onClick="select"
  android:text="所有圖片"
  android:textColor="#fff"
  android:textSize="14sp" />

 </RelativeLayout>

 <ListView
  android:id="@+id/listview"
  android:layout_width="match_parent"
  android:layout_height="360dp"
  android:layout_above="@id/bottom"
  android:background="#fff"
  android:visibility="gone" >
 </ListView>
 </RelativeLayout>

</LinearLayout>

主界面Java代碼MainActivity.java :

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;


 //存放所有選擇的照片
 private ArrayList<String> allSelectedPicture = new ArrayList<String>();

 //存放從選擇界面選擇的照片
 private ArrayList<String> selectedPicture = new ArrayList<String>();
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 context = this ;

 //設(shè)置在activity啟動(dòng)的時(shí)候輸入法默認(rèn)是不開啟的
 getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);

 ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(this)
  .threadPriority(Thread.NORM_PRIORITY - 2)//設(shè)置當(dāng)前線程的優(yōu)先級(jí)
  .denyCacheImageMultipleSizesInMemory()
  .diskCacheFileNameGenerator(new Md5FileNameGenerator())//使用MD5對(duì)UIL進(jìn)行加密命名
  .diskCacheSize(100 * 1024 * 1024)//50 Mb sd卡(本地)緩存的最大值
  .diskCacheFileCount(300)// 可以緩存的文件數(shù)量
  .tasksProcessingOrder(QueueProcessingType.LIFO)//后進(jìn)先出
  .build();

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

 initView();
 }

 /**
 * 初始化視圖
 */
 private void initView(){

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

 //顯示圖片
 gridview = (GridView) findViewById(R.id.gridview);

 gridAdapter = new GridAdapter();

 gridview.setAdapter(gridAdapter);
 }

 /**
 * 展示圖片的GridView的適配器
 */
 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) {
   //點(diǎn)擊后移除圖片
   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);
  }
  }
 }
 }
}

選擇圖片界面Java代碼SelectPictureActivity.java :

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 {

 // 最多選擇圖片的個(gè)數(shù)
 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;

 /**
 * 臨時(shí)的輔助類，用于防止同一個(gè)文件夾的多次掃描
 */
 private HashMap<String, Integer> tmpDir = new HashMap<String, Integer>();
 private ArrayList<ImageFloder> mDirPaths = new ArrayList<ImageFloder>();

 /**
 * 具體下載圖片，緩存圖片，顯示圖片的具體執(zhí)行類，它有兩個(gè)具體的方法displayImage(...)、loadImage(...)，
 */
 private ImageLoader loader;

 /**
 * 用于指導(dǎo)每一個(gè)Imageloader根據(jù)網(wǎng)絡(luò)圖片的狀態(tài)（空白、下載錯(cuò)誤、正在下載）顯示對(duì)應(yīng)的圖片，
 * 是否將緩存加載到磁盤上，下載完后對(duì)圖片進(jìn)行怎么樣的處理。
 */
 private DisplayImageOptions options;

 private ContentResolver mContentResolver;

 //選擇按鈕和完成按鈕
 private Button btn_select, btn_ok;

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

 private FolderAdapter folderAdapter;

 private ImageFloder imageAll, currentImageFolder;


 //已選擇的圖片
 private ArrayList<String> selectedPicture = new ArrayList<String>();

 private String cameraPath = null;

 private int isExisted ;

 private ArrayList<String> existedPictureList = new ArrayList<String>();

 @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)//設(shè)置圖片在下載期間顯示的圖片

  .showImageForEmptyUri(R.drawable.ic_launcher)//設(shè)置圖片Uri為空或是錯(cuò)誤的時(shí)候顯示的圖片

  .showImageOnFail(R.drawable.ic_launcher)//設(shè)置圖片加載/解碼過程中錯(cuò)誤時(shí)候顯示的圖片

  .cacheInMemory(true)//設(shè)置下載的圖片是否緩存在內(nèi)存中

  .cacheOnDisk(true) //設(shè)置下載的圖片是否緩存在SD卡中

  .considerExifParams(true)//啟用EXIF和JPEG圖像格式

  .imageScaleType(ImageScaleType.EXACTLY)//圖像將完全按比例縮小的目標(biāo)大小

  .bitmapConfig(Bitmap.Config.RGB_565)//設(shè)置圖片的解碼類型

  .build();

 initView();
 }

 /**
 * 點(diǎn)擊"所有圖片"按鈕事件
 * @param v
 */
 public void select(View v) {
 if (listview.getVisibility() == View.VISIBLE) {
  hideListAnimation();
 } else {
  listview.setVisibility(View.VISIBLE);
  showListAnimation();
  folderAdapter.notifyDataSetChanged();
 }
 }

 /**
 * 設(shè)置ListView的移動(dòng)的動(dòng)畫效果
 */
 public void showListAnimation() {
 TranslateAnimation ta = new TranslateAnimation(1, 0f, 1, 0f, 1, 1f, 1, 0f);
 ta.setDuration(200);
 listview.startAnimation(ta);
 }

 /**
 * 隱藏ListView的移動(dòng)的動(dòng)畫效果
 */
 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);
  }
 });
 }

 /**
 * 點(diǎn)擊完成按鈕
 */
 public void ok(View v) {
 Intent data = new Intent();
 data.putExtra(INTENT_SELECTED_PICTURE, selectedPicture);
 setResult(RESULT_OK, data);
 this.finish();
 }

 /**
 * 視圖初始化
 */
 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();
 }

 /**
 * 使用相機(jī)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);
 }

 /**
 * 用于拍照時(shí)獲取輸出的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) {

  //自定義的一個(gè)類用來緩存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) {//拍攝圖片
  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);

  //顯示圖片
  loader.displayImage("file://" + item.path, holder.iv, options);

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

   //若選中的圖片多于所設(shè)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;
   }

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

    //加入數(shù)組
    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;
 }
 }

 //自定義的一個(gè)類用來緩存convertview
 class ViewHolder {
 ImageView iv;
 Button checkBox;
 }

 /**
 * 所有圖片
 */
 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;
 }
 }

 //自定義的一個(gè)類用來緩存convertview
 class FolderViewHolder {
 ImageView id_dir_item_image;
 ImageView choose;
 TextView id_dir_item_name;
 TextView id_dir_item_count;
 }

 /**
 * 獲取縮略圖
 */
 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 {

  // 獲取圖片的路徑
  String path = mCursor.getString(_date);
  imageAll.images.add(new ImageItem(path));

  // 獲取該圖片的父路徑名
  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 {
 /**
  * 圖片的文件夾路徑
  */
 private String dir;

 /**
  * 第一張圖片的路徑
  */
 private String firstImagePath;
 /**
  * 文件夾的名稱
  */
 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;
 }
 }

}

最后還要在清單文件AndroidManifest.xml中設(shè)置權(quán)限：

 <uses-permission android:name="android.permission.INTERNET"/>
 <uses-feature android:name="android.hardware.camera" />
 <uses-feature android:name="android.hardware.camera.autofocus" />

 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

下載地址：
Android自定義仿微信圖片選擇器.zip

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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