循环上传列表图片一张一张 [英] Loop to upload list images one by one
本文介绍了循环上传列表图片一张一张的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想一张一张地上传多张图片，就像一旦用户点击上传所有按钮，它必须从列表中可见的第一张图片开始，一旦第一张图片将上传到服务器然后必须自动开始第二次上传，但在一两秒间隔后，列表中的所有可用图像都相同.
I want to upload multiple images one by one, like once user do tap on upload all button, it has to start with first image visible in a list, once first image will be uploaded to server then automatically has to start second for upload but after one or two second interval and same for all available images in a list.
这是我的代码，它允许我上传单个图像:-
This is my code, which allow me to upload single image:-
上传单张图片的代码
// btnUpload
holder.uploadImageButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Upload
startUpload(position);
}
});
我正在使用下面的代码，但它同时上传/同步所有图像，我的意思是在一起，就像我有500张图像在一个列表中，所以它一起上传所有 500 个，结果当互联网连接中断时我收到错误并且很多次没有获得上传图像的准确状态！
I am using below code, but its uploading/syncing all images at same time, my mean together, like i have 500 images in a list so its uploading all 500 together and as a result i am getting error when internet connection goes down and many times not getting accurate status of uploaded images !
private SparseBooleanArray flags = new SparseBooleanArray();
// At onClick, set all the flags to indicate that some data needs to be synced
ImageButton buttonUploadAll = (ImageButton) findViewById(R.id.sync_btn);
buttonUploadAll.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
for(int position=0; position<listView.getAdapter().getCount(); position++)
{
flags.put(position, true);
}
// Calling this would ensure a call to getView() on every
// visible child of the listview. That is where we will check if
// the data is to be synced and displayed or not
((BaseAdapter) listView.getAdapter()).notifyDataSetChanged();
}
});
@Override
// In getView of the listview's adapter
public View getView(int position, View convertView, ViewGroup parent) {
// If this item is to be synced
if(flags.get(position)) {
startUpload();
// Mark as synced
flags.put(position, false);
}
// Rest of the method that draws the view....
}
这就是为什么我要一张一张上传多张图片(以队列方式)
that's why i want to upload multiple images one by one (in a queue manner)
推荐答案
我尝试编写一个服务，该服务将从共享首选项上传图像:注意:我对这里的一些东西进行了硬编码，比如图像来自 sdcard，所以路径是硬编码的，图像名称是硬编码的，所以请适当更改它并尝试下面的代码，我进行了测试并为我工作
I have tried to write a service which will upload image from shared pref one by one : Note : i hv hardcoded some of things here like image are from sdcard so path is hardcoded, images names are hardcoded, so plz change it appropriately and try out below code , i hv tested and worked for me
下面的代码包含Service、Activity[upload button, listview]、xmlLayout、php service在 ftp 上上传图片.
Below code contains Service, Activity[upload button, listview], xmlLayout, php service which will upload image on ftp.
活动:
public class MainActivity extends Activity {
SharedPreferences sharedPref;
SharedPreferences.Editor editor;
ListView listview;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sharedPref = getSharedPreferences("myfiles", MODE_PRIVATE);
editor = sharedPref.edit();
editor.putString("0", "monika_pin.png");
editor.putString("1", "monika_pin1.png");
editor.putString("2", "monika_pin2.png");
editor.commit();
String[] arr = new String[] { "/mnt/sdcard/monika_pin.png",
"/mnt/sdcard/monika_pin1.png", "/mnt/sdcard/monika_pin2.png" };
List<String> list = Arrays.asList(arr);
MyAdapter adapter = new MyAdapter(this, R.layout.listitem_imv, list);
listview = (ListView) findViewById(R.id.listView1);
listview.setAdapter(adapter);
}
class MyAdapter extends ArrayAdapter<String> {
List<String> mList;
LayoutInflater mInflater;
int mResource;
public MyAdapter(Context context, int resource, List<String> objects) {
super(context, resource, objects);
mResource = resource;
mInflater = getLayoutInflater();
mList = objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
if (convertView == null) {
view = mInflater.inflate(mResource, null);
} else {
view = convertView;
}
ImageView imageView = (ImageView) view
.findViewById(R.id.imageView1);
TextView textView = (TextView) view.findViewById(R.id.textView1);
imageView.setTag(mList.get(position));// tag of imageView == path to
// image
new LoadImage(imageView).execute();
textView.setText(mList.get(position).toString());
return view;
}
}
class LoadImage extends AsyncTask<Object, Void, Bitmap> {
private ImageView imv;
private String path;
public LoadImage(ImageView imv) {
this.imv = imv;
this.path = imv.getTag().toString();
}
@Override
protected Bitmap doInBackground(Object... params) {
Bitmap bitmap = null;
// File file = new File(
// Environment.getExternalStorageDirectory().getAbsolutePath() +
// path);
File file = new File(path);
if (file.exists()) {
bitmap = BitmapFactory.decodeFile(file.getAbsolutePath());
}
return bitmap;
}
@Override
protected void onPostExecute(Bitmap result) {
if (!imv.getTag().toString().equals(path)) {
/*
* The path is not same. This means that this image view is
* handled by some other async task. We don't do anything and
* return.
*/
return;
}
if (result != null && imv != null) {
imv.setVisibility(View.VISIBLE);
imv.setImageBitmap(result);
} else {
imv.setVisibility(View.GONE);
}
}
}
public void buttonClick(View view) {
Intent intent = new Intent(this, MyService.class);
startService(intent);
}
}
服务:
public class MyService extends Service {
SharedPreferences sharedPref;
SharedPreferences.Editor editor;
int serverResponseCode = 0;
String upLoadServerUri = null;
private static final String TAG = "com.example.ServiceExample";
@Override
public void onCreate() {
Log.i(TAG, "Service onCreate");
sharedPref = getSharedPreferences("myfiles", MODE_PRIVATE);
/************* Php script path ****************/
upLoadServerUri = "http://myserver/uploadimage.php";
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i(TAG, "Service onStartCommand " + startId);
final int currentId = startId;
Runnable r = new Runnable() {
public void run() {
for (int i = 0; i < 3; i++) {
// long endTime = System.currentTimeMillis() + 10*1000;
// while (System.currentTimeMillis() < endTime) {
synchronized (this) {
try {
uploadFile(sharedPref.getString(i + "", ""));
} catch (Exception e) {
}
}
// }
Log.i(TAG, "Service running " + currentId);
}
stopSelf();
}
};
Thread t = new Thread(r);
t.start();
return Service.START_STICKY;
}
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
Log.i(TAG, "Service onBind");
return null;
}
@Override
public void onDestroy() {
Log.i(TAG, "Service onDestroy");
}
public int uploadFile(String sourceFileUri) {
String fileName = sourceFileUri;
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "
";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
// File sourceFile = new
// File(Environment.getExternalStorageDirectory(),sourceFileUri);
File sourceFile = new File(Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/" + fileName);
if (!sourceFile.isFile()) {
return 0;
} else {
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(
sourceFile);
URL url = new URL(upLoadServerUri);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("Content-Type",
"multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("uploaded_file", fileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
// dos.writeBytes("Content-Disposition: form-data; name="uploaded_file";filename=""+ fileName + """
// + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name="uploaded_file";filename=""
+ fileName + """ + lineEnd);
dos.writeBytes(lineEnd);
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// Responses from the server (code and message)
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response is : "
+ serverResponseMessage + ": " + serverResponseCode);
if (serverResponseCode == 200) {
}
// close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
ex.printStackTrace();
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
e.printStackTrace();
Log.e("Upload file to server Exception",
"Exception : " + e.getMessage(), e);
}
return serverResponseCode;
} // End else block
}
}
XmlLayout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.service.MainActivity" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:onClick="buttonClick"
android:text="Button" />
<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/button1"
android:layout_centerHorizontal="true" >
</ListView>
</RelativeLayout>
AndroidManifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.service"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
>
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".MyService" />
</application>
</manifest>
PhP 脚本:
<?php
$file_path = "uploads/";
$file_path = $file_path . basename( $_FILES['uploaded_file']['name']);
if(move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $file_path)) {
echo "success";
} else{
echo "fail";
}
?>
注意:上面确定你在 ftp 上创建这个 php 文件的位置，创建一个文件夹，也称为上传，所有文件都将上传
如果你想下载完整的源代码 --> 源代码
If u wish to download complete Source code --> Source Code
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