我在使用Android 3.x及更高版本的多个图片上传时出现此问题。我的应用程序是混合的，它不是纯粹的Android。我必须使用Phonegap界面进行Android编码。所以这是我用AsyncTask编写的代码。这对于Android 2.3来说同样适用，但不适用于Android 3.x及更高版本。我正在分享我的代码。
public class CFileUploader extends Plugin {
private String ACTION_POST_DATA = "cpost_data";
private String CrLf = "\r\n";
String base64Str=null;
@Override
public PluginResult execute(String arg0, JSONArray arg1, String arg2) {
Log.e("Sample App", " IN EXECUTE METHOD ");
PluginResult pluginResult = null;
if (ACTION_POST_DATA.equals(arg0)) {
try {
upload(arg1.getString(0), arg1.getString(1), arg1.getString(2),
arg1.getString(3), arg1.getString(4));
} catch (JSONException jsonex) {
jsonex.printStackTrace();
}
}
return pluginResult;
}
private PluginResult upload(String token, String date, String time,
String email, String fileNames) {
Log.e("Sample App", " IN UPLOAD METHOD ");
PluginResult pluginres = null;
final Data obje=new Data(token, date, time, email, fileNames);
CFileUploader.this.ctx.runOnUiThread(new Runnable(){
public void run(){
MyImageTask mTask=new MyImageTask();
mTask.execute(obje);
}
});
return pluginres;
}
class Data {
String token, date, time, email, fileNames;
Data(String token, String date, String time, String email, String fileNames){
this.token=token;
this.date=date;
this.time=time;
this.email=email;
this.fileNames=fileNames;
}
}
private class MyImageTask extends AsyncTask<Data, String, String>{
@Override
protected String doInBackground(Data... params) {
HttpURLConnection conn = null;
DataOutputStream dos = null;
DataInputStream inStream = null;
ByteArrayOutputStream baos = null;
byte[] imgData = null;
String urlString = "https://www.sampledata.com/myapp/upload_snapshots.php";
Log.e("Sample App", " token " + params[0].token + " " + "date " + params[0].date + " "
+ " time " + params[0].time + " " + "email " + params[0].email);
Log.e("Sample App", " imgPath " + params[0].fileNames);
try {
URL url = new URL(urlString);
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type",
"multipart/form-data;boundary=---------------------------1177141514664");
String msg = "";
StringBuffer buffer = new StringBuffer(msg);
buffer.append("-----------------------------1177141514664");
buffer.append(CrLf);
buffer.append("Content-Disposition: form-data; name=\"token\";"
+ CrLf);
buffer.append(CrLf);
buffer.append(params[0].token + CrLf);
buffer.append("-----------------------------1177141514664");
buffer.append(CrLf);
buffer.append("Content-Disposition: form-data; name=\"date\";"
+ CrLf);
buffer.append(CrLf);
buffer.append(params[0].date + CrLf);
buffer.append("-----------------------------1177141514664");
buffer.append(CrLf);
buffer.append("Content-Disposition: form-data; name=\"time\";"
+ CrLf);
buffer.append(CrLf);
buffer.append(params[0].time + CrLf);
buffer.append("-----------------------------1177141514664");
buffer.append(CrLf);
buffer.append("Content-Disposition: form-data; name=\"MAX_FILE_SIZE\";"
+ CrLf);
buffer.append(CrLf);
buffer.append("100000000072000" + CrLf);
buffer.append("-----------------------------1177141514664");
buffer.append(CrLf);
buffer.append("Content-Disposition: form-data; name=\"email\";"
+ CrLf);
buffer.append(CrLf);
buffer.append(params[0].email + CrLf);
buffer.append("-----------------------------1177141514664");
buffer.append(CrLf);
buffer.append("Content-Disposition: form-data; name=\"appkey\";"
+ CrLf);
buffer.append(CrLf);
buffer.append("426C3A7D5992B838BAF1BD10594C920C" + CrLf);
buffer.append("-----------------------------1177141514664");
buffer.append(CrLf);
buffer.append("Content-Disposition: form-data; name=\"method\";"
+ CrLf);
buffer.append(CrLf);
buffer.append("upload.snapshots" + CrLf);
String msg1 = "";
StringBuffer imgBuffer = new StringBuffer(msg1);
List<byte[]> byetsInfo = new ArrayList<byte[]>();
ArrayList<String> filenames = new ArrayList<String>();
try {
JSONObject jObj = new JSONObject(new String(params[0].fileNames));
JSONArray jArray = jObj.getJSONArray("snapshot_images");
String drPath = android.os.Environment
.getExternalStorageDirectory().toString();
for (int i = 0; i < jArray.length(); i++) {
String img = jArray.getString(i);
Log.e("Sample app", " imageName " + img);
File f = new File(drPath + "/myapp_images/" + img);
Uri ur = Uri.fromFile(f);
filenames.add(img);
Bitmap bmp;
try {
bmp = Media.getBitmap(CFileUploader.this.cordova
.getActivity().getContentResolver(), ur);
baos = new ByteArrayOutputStream();
bmp.compress(CompressFormat.JPEG, 90, baos);
imgData = baos.toByteArray();
Log.e("Sample app", " img data size " + imgData.length);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
byetsInfo.add(imgData);
}
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String msg3 = "";
StringBuffer eofBuffer = new StringBuffer(msg3);
eofBuffer.append(CrLf);
eofBuffer.append("-----------------------------4664151417711--");
eofBuffer.append(CrLf);
conn.setChunkedStreamingMode(0);
for (int i = 0; i < byetsInfo.size(); i++) {
dos = new DataOutputStream(conn.getOutputStream());
imgBuffer.delete(0, imgBuffer.length());
imgBuffer.append("-----------------------------4664151417711");
imgBuffer.append(CrLf);
imgBuffer.append("Content-Disposition: form-data; name=\"snapshotUpload[]\"; filename=\""
+ filenames.get(i) + "\"" + CrLf);
imgBuffer.append("Content-Type: image/jpeg" + CrLf);
imgBuffer.append(CrLf);
dos.write(buffer.toString().getBytes());
dos.write(imgBuffer.toString().getBytes());
int index = 0;
int size = 1024;
do {
if ((index + size) < byetsInfo.get(i).length) {
size = byetsInfo.get(i).length - index;
}
dos.write(byetsInfo.get(i), index, size);
index += size;
} while (index < byetsInfo.get(i).length);
Log.e("file upload ", " written: " + index);
dos.write(eofBuffer.toString().getBytes());
}
Log.e("Debug", "File is written");
Log.e("activity upload demo ",
" in file upload " + conn.getResponseMessage());
dos.flush();
} catch (Exception ec) {
ec.printStackTrace();
}
// Read the response
try {
inStream = new DataInputStream(conn.getInputStream());
char buff = 512;
int len;
byte[] data = new byte[buff];
do {
len = inStream.read(data);
if (len > 0) {
System.out.println(new String(data, 0, len));
base64Str += new String(data, 0, len);
Log.e("Sample app", " " + new String(data, 0, len));
}
} while (len > 0);
Log.e("file upload ", " DONE ");
dos.close();
inStream.close();
} catch (Exception ex) {
ex.printStackTrace();
}
try {
if (conn.getResponseMessage().equalsIgnoreCase("OK")) {
return base64Str;
} else {
return null;
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
}
}
}
我将从js文件中获取的令牌，日期，时间，电子邮件和文件名。
我应该得到一个base64字符串：
Submitted Requests:
requests={"imageInfo":{"snapshotDateTime":"2012-12-09 22:38:14","snapshots":{"name":["Water lilies.jpg","Sunset.jpg"],"type":["image\/jpeg","image\/jpeg"],"tmp_name":["\/tmp\/phpXmZchs","\/tmp\/phpqylUgX"],"error":[0,0],"size":[83794,71189]}}}
当我在android 3.x及更高版本中运行此代码时，我没有得到它们中的任何一个。
如果我在某个地方出错了，请纠正我。非常感谢。
答案 0 :(得分：1)
谁回答了很多感谢。经过几天的挣扎，我终于找到了解决方案，它只是一行代码，它正在做所有的混乱。
conn.setChunkedStreamingMode(0);
我删除了上面一行，它在所有设备上运行正常，无论版本如何。
答案 1 :(得分：0)
我猜您正在尝试为多个上传启动多个AsyncTasks。 您假设每个任务都创建了一个不同的线程，这对于预蜂窝版本是正确的，但在蜂窝状态下，之后AsyncTask的行为被更改，并且Asynctask的所有实例都运行单个线程。 看看这个方法真正的并行执行
executeOnExecutor(java.util.concurrent.Executor, Object[]) with THREAD_POOL_EXECUTOR.