首先具体分析一下，实现的功能，其中需求分析是必不可少的，需求、逻辑清除之后，再上手写代码，思路会很清晰。
1.多图上传首先得选择图片（这里项目需求是既可以拍照上传也可以从相册中选择）
2.拍照上传很简单了网上也有很多例子，调用照相机，返回uri，获取图片
3.从相册中选择图片
3.1 获取手机中的所有图片 3.2 将图片存到自定义图片数组中显示 3.3 自定义ViewPager浏览图片
主要的逻辑大体是这样，下面具体看一下实现：
一、首先看一下界面：
<com.view.NoScrollGridView android:id="@+id/noScrollgridview" android:layout_marginLeft="@dimen/smaller_space" android:layout_marginRight="@dimen/smaller_space" android:layout_width="match_parent" android:layout_height="wrap_content" android:horizontalSpacing="3dp" android:listSelector="@color/transparent" android:numColumns="3" android:scrollbars="none" android:layout_gravity="center" android:layout_marginTop="@dimen/smaller_space" android:verticalSpacing="5dp" />
是一个 NoScrollGridView，项目需要，所以用了不滚动的GridView，大家用GridView也是一样的。
noScrollgridview = (GridView) findViewById(R.id.noScrollgridview); noScrollgridview.setSelector(new ColorDrawable(Color.TRANSPARENT)); /*新建传值给adapter*/ if (file == null) { picAdapter = new PictureAdapter(this, 0, null); } else { //添加失败的图片到数组中 for (int i=0;i<file.getMulFailFilePaths().length;i++){ ImageItem imageItem = new ImageItem(); imageItem.setImagePath(file.getMulFailFilePaths()[i].trim()); Bimp.tempSelectBitmap.add(imageItem); } /*上传失败传值给adapter*/ picAdapter = new PictureAdapter(this, 2, file); }
这个是初始化图片数组，适配器（新建、上传失败、上传成功的图片我用的都是一个adapter）
ImageItem是图片的模型，下面有它的属性
//从图库选择的图片model public class ImageItem extends File implements Serializable { @Id public String imageId; //图片id public String thumbnailPath; public String imagePath; //图片路径 private Bitmap bitmap; public boolean isSelected = false; public String getImageId() { return imageId; } public void setImageId(String imageId) { this.imageId = imageId; } public String getThumbnailPath() { return thumbnailPath; } public void setThumbnailPath(String thumbnailPath) { this.thumbnailPath = thumbnailPath; } public String getImagePath() { return imagePath; } public void setImagePath(String imagePath) { this.imagePath = imagePath; } public boolean isSelected() { return isSelected; } public void setSelected(boolean isSelected) { this.isSelected = isSelected; } [java] view plain copy print? /*根据图片路径获取图片的bitmap*/ public Bitmap getBitmap() { if(bitmap == null){ try { bitmap = Bimp.revitionImageSize(imagePath); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return bitmap; } public void setBitmap(Bitmap bitmap) { this.bitmap = bitmap; }
接下来是适配器：
由于涉及到添加图片，adapter中添加一个flag用来显示新建的图片，将选择的图片添加到公有的图片数组中，初始化的时候加载图片数组显示。（大家在看的时候可以忽略掉我的flag）
@SuppressLint("HandlerLeak") public class PictureAdapter extends BaseAdapter { private LayoutInflater inflater; private int selectedPosition = -1; private boolean shape; private int flag = 0;//0 默认新建 1上传成功 2上传失败 private AppItem_file file; public boolean isShape() { return shape; } private Activity context; public void setShape(boolean shape) { this.shape = shape; } public PictureAdapter(Activity context,int flag,AppItem_file file) { this.context = context; inflater = LayoutInflater.from(context); this.flag = flag; this.file = file; } // public void update() { // loading(); // } public int getCount() { if (flag==0){ //新建图片 if (Bimp.tempSelectBitmap.size() == 6) { return 6; } return (Bimp.tempSelectBitmap.size() + 1); } else if (flag==1){ //上传成功 return file.getFileList().size(); } else { //上传失败 return file.getMulFailFilePaths().length; } } public Object getItem(int arg0) { if (flag==1){ return file.getFileList().get(arg0); }else { return file.getMulFailFilePaths()[arg0]; } } public long getItemId(int arg0) { return arg0; } public void setSelectedPosition(int position) { selectedPosition = position; } public int getSelectedPosition() { return selectedPosition; } public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; if (convertView == null) { //根据图片的数量加载不同布局 if (getCount()==1&&flag!=0){ convertView = inflater.inflate(R.layout.item_published_singal_item, parent, false); } else { convertView = inflater.inflate(R.layout.item_published_grida, parent, false); } holder = new ViewHolder(); holder.image = (ImageView) convertView .findViewById(R.id.item_grida_image); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } /** * 根据初始化adapter传过来的flag值，去不同的地方找图片 * flag=0，去Bimp的图片数组中找 * flag=1，证明上传成功的，去下载好的getFileList中找 * flag=2，为上传失败的，图片保存在FailFile中的List<ImageItem>中 * 优化图片显示 */ if (flag==0){ //新建图片 if (position == Bimp.tempSelectBitmap.size()) { holder.image.setImageBitmap(BitmapFactory.decodeResource( convertView.getResources(), R.drawable.icon_add_pic_unfocused)); if (position == 6) { if (flag==0){ holder.image.setVisibility(View.GONE); } } } else { holder.image.setImageBitmap(Bimp.tempSelectBitmap.get(position).getBitmap()); } } else if (flag==1){ //上传成功 // List<Integer> ids = new ArrayList<Integer>(); // for (int i=0;i<file.getFileList().size();i++){ // ids.add(file.getFileList().get(i).getS_id()); // } int id=file.getFileList().get(position).getS_id(); try { // File file= NeedApplication.db.findById(File.class,id); String fileBigImgUri =NeedApplication.db.findById(File.class,id).getFileUriBig(); if (fileBigImgUri!=null&&!"null".equals(fileBigImgUri)) ImageLoader.getInstance().displayImage((fileBigImgUri).trim(),holder.image); } catch (DbException e) { e.printStackTrace(); } } else { //上传失败 String url = "file://"+file.getMulFailFilePaths()[position].trim(); ImageLoader.getInstance().displayImage(url, holder.image); } return convertView; } public class ViewHolder { public ImageView image; } }
下面是自定义相册界面，用来选择图片的
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#E1E0DE" > <RelativeLayout android:id="@+id/headview" android:layout_width="fill_parent" android:layout_height="45dp" android:background="@drawable/plugin_camera_title_bar" android:gravity="center_vertical" android:layout_marginBottom="3dp" > <Button android:layout_width="60dp" android:layout_height="wrap_content" android:textSize="14sp" android:textColor="#fff" android:id="@+id/back" android:text="相册" android:background="@drawable/plugin_camera_title_btn_back" android:layout_marginTop="5dp" android:layout_marginBottom="5dp" android:layout_centerVertical="true" /> <Button android:layout_width="67dp" android:layout_height="wrap_content" android:textSize="14sp" android:textColor="#fff" android:id="@+id/cancel" android:text="取消" android:background="@drawable/plugin_camera_title_btn_cancel" android:layout_centerVertical="true" android:layout_marginRight="5dp" android:layout_alignParentRight="true" /> </RelativeLayout> <RelativeLayout android:id="@+id/bottom_layout" android:layout_width="match_parent" android:layout_height="50dp" android:layout_alignParentBottom="true" android:background="@drawable/plugin_camera_bottom_bar" android:layout_marginTop="3dp" > <Button android:id="@+id/preview" android:layout_width="90dp" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:layout_marginLeft="10dp" android:text="预览" android:background="@drawable/plugin_camera_title_btn_preview" /> <Button android:id="@+id/ok_button" android:layout_width="90dp" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_marginRight="10dp" android:background="@drawable/plugin_camera_ok_btn_state" /> </RelativeLayout> <GridView android:id="@+id/myGrid" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_above="@id/bottom_layout" android:layout_below="@id/headview" android:layout_centerInParent="true" android:layout_marginTop="2dp" android:horizontalSpacing="10dp" android:numColumns="4" android:verticalSpacing="10dp" android:background="#E1E0DE" /> <TextView android:id="@+id/myText" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:text="相册没有图片" android:textColor="@color/black" /> </RelativeLayout>
同样也是用了GridView，获取手机中的图片，添加到数组中，显示
这里用到了一个AlbumHelper（相册帮助类），网上找的代码，感觉挺好的
public List<ImageBucket> getImagesBucketList(boolean refresh) { if (refresh || (!refresh && !hasBuildImagesBucketList)) { buildImagesBucketList(); } List<ImageBucket> tmpList = new ArrayList<ImageBucket>(); Iterator<Entry<String, ImageBucket>> itr = bucketList.entrySet() .iterator(); while (itr.hasNext()) { Entry<String, ImageBucket> entry = (Entry<String, ImageBucket>) itr .next(); tmpList.add(entry.getValue()); } return tmpList; }
获取到数据源之后，该显示了，也就是利用的获取图片帮助类里面的方法
// 初始化，给一些对象赋值 private void init() { helper = AlbumHelper.getHelper(); helper.init(getApplicationContext()); contentList = helper.getImagesBucketList(false); dataList = new ArrayList<ImageItem>(); for(int i = 0; i<contentList.size(); i++){ dataList.addAll( contentList.get(i).imageList ); } back = (Button) findViewById(R.id.back); cancel = (Button) findViewById(R.id.cancel); cancel.setOnClickListener(new CancelListener()); back.setOnClickListener(new BackListener()); preview = (Button) findViewById(R.id.preview); preview.setOnClickListener(new PreviewListener()); intent = getIntent(); Bundle bundle = intent.getExtras(); gridView = (GridView) findViewById(R.id.myGrid); gridImageAdapter = new AlbumGridViewAdapter(mContext,dataList,Bimp.tempSelectBitmap); gridView.setAdapter(gridImageAdapter); tv = (TextView) findViewById(R.id.myText); gridView.setEmptyView(tv); okButton = (Button) findViewById(R.id.ok_button); okButton.setText("完成"+"(" + Bimp.tempSelectBitmap.size() + "/"+ NeedApplication.picNums+")"); } gridImageAdapter .setOnItemClickListener(new AlbumGridViewAdapter.OnItemClickListener() { @Override public void onItemClick(final ToggleButton toggleButton, int position, boolean isChecked,Button chooseBt) { if (Bimp.tempSelectBitmap.size() >= NeedApplication.picNums) { toggleButton.setChecked(false); chooseBt.setVisibility(View.GONE); if (!removeOneData(dataList.get(position))) { Toast.makeText(AlbumActivity.this, "超出可选图片张数", Toast.LENGTH_SHORT).show(); } return; } if (isChecked) { chooseBt.setVisibility(View.VISIBLE); Bimp.tempSelectBitmap.add(dataList.get(position)); okButton.setText("完成"+"(" + Bimp.tempSelectBitmap.size() + "/"+ NeedApplication.picNums+")"); } else { Bimp.tempSelectBitmap.remove(dataList.get(position)); chooseBt.setVisibility(View.GONE); okButton.setText("完成"+"(" + Bimp.tempSelectBitmap.size() + "/"+ NeedApplication.picNums+")"); } isShowOkBt(); } });
点击图片选择加到公有图片数组中显示已选择。
最后是预览图片，利用自定义viewpager，实现图片滑动，下面贴两张截图吧：
以上就是本文的全部内容，希望对大家的学习有所帮助。