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：
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<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" />
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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。
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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);
}
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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
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//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;
}
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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）
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@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;
}
}
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下面是自定义相册界面，用来选择图片的
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<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>
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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
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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;
}
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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
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// 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+")");
}
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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();
}
});
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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。