Android图片上传

背景：图片上传是一般项目都会涉及到的功能，本篇抽取项目中图片上传的流程，做个记录，不至于以后无处查阅。

1、MainActivity1界面样式：点击添加按钮跳转到图片选择的界面，这个业务逻辑很简单就不贴代码了。不过下面的空白部分是一个recycleView，用来显示图片的

2、点击添加图片的按钮

在这里用到了
https://github.com/yanzhenjie/Album这位老哥封装好的读取手机图片的框架

可以选择本地的图片或者视频，或者拍照录制的文件，一行代码搞定复杂的图片获取

有兴趣的可以参考他的使用文档

          Album.image(OnlineBookingUI3.this) // 选择图片。.multipleChoice().requestCode(200 ).camera(false)//不允许拍照.columnCount(3)//列数.widget(getWight())//设置标题栏.selectCount(20-//默认选择的数量mAdapter.getDatas().size() +1).listener(new AlbumListener<ArrayList<AlbumFile>>() {//监听选择的结果，异步的@Overridepublic void onAlbumResult(int requestCode, @NonNull ArrayList<AlbumFile> result) {                                                     showHideText();}@Overridepublic void onAlbumCancel(int requestCode) {}}).start();

看看这个widget(getWight())//设置标题栏的方法，选择完成后，我们返回，或者说确定自己的选择都会调用这个标题栏的方法

 /*** 更改图片选择器的title* @return*/public Widget getWight() {return Widget.newDarkBuilder(context).statusBarColor(ContextCompat.getColor(context, com.yanzhenjie.album.R.color.album_ColorPrimaryDark)).toolBarColor(ContextCompat.getColor(context, com.yanzhenjie.album.R.color.album_ColorPrimary)).navigationBarColor(ContextCompat.getColor(context, com.yanzhenjie.album.R.color.album_ColorPrimaryBlack)).title("照片列表").mediaItemCheckSelector(ContextCompat.getColor(context, com.yanzhenjie.album.R.color.album_WhiteGray),ContextCompat.getColor(context, com.yanzhenjie.album.R.color.album_ColorPrimary)).bucketItemCheckSelector(ContextCompat.getColor(context, com.yanzhenjie.album.R.color.album_WhiteGray),ContextCompat.getColor(context, com.yanzhenjie.album.R.color.album_ColorPrimary)).buttonStyle(Widget.ButtonStyle.newDarkBuilder(context).setButtonSelector(ContextCompat.getColor(context, com.yanzhenjie.album.R.color.album_ColorPrimary),ContextCompat.getColor(context, com.yanzhenjie.album.R.color.album_ColorPrimaryDark)).build()).build();}

好吧，并没有调用，只是设置标题栏而已，点击返回或者确定，内部自己就会监听，给我们回调。

3、完成了图片的添加和显示，接着就需要考虑到图片的上传了。。。

使用到了AsyncTask（总体代码）

    private class MyTask extends AsyncTask<Object, Object, RequestParams> {@Override//对上传的数据进行处理protected RequestParams doInBackground(Object... params) {PurchaseParamsBean purchaseParamsBean = new PurchaseParamsBean();purchaseParamsBean.setPurchaseFiles(getAllBase64Img());RequestParams requestParams = new RequestParams();requestParams.add("Source", 2 + "");requestParams.add("tokenID", SPUtils.get(context, Constants.tokenID, "").toString());requestParams.add("OpenId", "");String value = new Gson().toJson(purchaseParamsBean);requestParams.add("PurchaseParams", value);for (int i = 0; i < mAdapter.getDatas().size(); i++) {try {String path = mAdapter.getDatas().get(i).getPath();if (!TextUtils.isEmpty(path)) {requestParams.put("files" + i, CompressUtil.getCompressPic(path, getCacheDir().getPath()));}} catch (FileNotFoundException e) {e.printStackTrace();}}return requestParams;}
//进行网络请求@Overrideprotected void onPostExecute(RequestParams requestParams) {sendRequest(Http_Url.InsertHirePurchase, requestParams, OnlyIntModelBean.class, "", false, btn_perfectdata_submit, new BaseCallBack<OnlyIntModelBean>() {@Overridepublic void onSuccess(OnlyIntModelBean onlyIntModelBean) {if (onlyIntModelBean != null) {if (onlyIntModelBean.getStatu() == 1) {ToastL.show("预订成功");AbsUI.startUI(context, MyOrderUI.class);mAdapter.getDatas().clear();mAdapter = null;mRv = null;stopUI(ui);} else if (onlyIntModelBean.getStatu() == -2) {ToastL.show(onlyIntModelBean.getMsg());
//                            StringUtils.IsOUTOFtime(context, OnlineBookingUI3.this.ui);} else {ToastL.show(onlyIntModelBean.getMsg());}}}}

（代码解析）
我们一步步看，PurchaseParamsBean 里添加了图片组的字段，用一个ArrayList在表示

public class PurchaseParamsBean {
。。。public ArrayList purchaseFiles= null;//附件public ArrayList getPurchaseFiles() {return purchaseFiles;}public void setPurchaseFiles(ArrayList purchaseFiles) {this.purchaseFiles = purchaseFiles;}
。。。
}

在AysnTask里对purchaseFiles赋值了。

           purchaseParamsBean.setPurchaseFiles(getAllBase64Img());public ArrayList<String> getAllBase64Img() {ArrayList<String> arr = new ArrayList<>();for (AlbumFile file : mAdapter.getDatas()) {if (!TextUtils.isEmpty(file.getPath())) {arr.add(getBase64String4Loader(file.getPath()));}}if (arr.size() == 0) {return null;} else {return arr;
//            return new Gson().toJson(arr);}}/*** 创建图片数组---通过ImageLoader** @return*/private String getBase64String4Loader(Object tag) {Bitmap bitmap = null;if (tag instanceof Uri) {// 取出本地uriUri uri = (Uri) tag;Log.e(TAG, "uri:" + uri.toString());bitmap = CompressUtil.getimage(BitmapUtils.getImageAbsolutePath(OnlineBookingUI3.this, uri));} else {// 取出绝对路径（从路径里解析出文件类型）String path = (String) tag;Log.e(TAG, "path:" + path);bitmap = CompressUtil.getimage(path);}byte[] bytes = CompressUtil.compressImage(bitmap);Log.e(TAG, bytes.length + "");String base64 = Base64.encodeToString(bytes, Base64.DEFAULT);// 回收bitmap.recycle();Log.e(TAG, "getBase64String4Loader回收了bitmap");return base64;}

最终将url转化成了一种字符串,base64编码，有兴趣的可以了解

sendRequest的实现public <T> void sendRequest(String url, RequestParams param, final Class<T> clazz, String showText, boolean isdialogShow, View view, final BaseCallBack<T> baseCallBack) {if (null == param) param = new RequestParams();AsyncCallBackHandler res = new AsyncCallBackHandler(ui, showText, isdialogShow, view) {@Overridepublic void mySuccess(int arg0, Header[] arg1, String arg2) {String s = arg2;if (arg2.startsWith("<?xml") || arg2.startsWith("<string")) {s = parseXMLwithPull(arg2);}//                Bean bean = GJson.parseObject(s, Bean.class);T t = null;try {
//                    t =  new Gson().p(s, clazz);t = new Gson().fromJson(s, clazz);} catch (Exception e) {e.printStackTrace();baseCallBack.onFailure("json解析异常", new IllegalStateException("json解析异常"));}baseCallBack.onSuccess(t);}@Overridepublic void myFailure(int arg0, Header[] arg1, String arg2, Throwable arg3) {baseCallBack.onFailure(arg2, arg3);}@Overridepublic void onStart() {super.onStart();baseCallBack.onStart();}@Overridepublic void onFinish() {super.onFinish();baseCallBack.onFinish();}};AsyncHttpUtil.post(url, context, param, res);}最终会回调上面的onsUCCESSAsyncHttpUtil.post(url, context, param, res);的实现/*** post已key,value形式传参，返回一个字符串数据** @param urlString* @param params* @param res*/public static void post(String urlString, Context context, RequestParams params, AsyncHttpResponseHandler res) // url里面带参数{NetworkState state = new NetworkState(context);if (state.isConnected() == false) {Prompt.showWarning(context, "请检查您的网络");return;}client.post(urlString, params, res);}

这主要是要注意格式，回调，图片压缩，这几方面