PHP サーバーへの複数の画像のアップロードに問題があります。以下のコードは Android 2.x バージョンでは正常に動作しますが、同じコードは Android 4.x 以降では動作しません。グーグルで調べたところ、データの投稿は AsyncTask によって非同期的に行う必要があることがわかりました。しかし、phonegap（非同期タスクの呼び出し）を介してどのように行う必要があるかについてはわかりません。
ここに私のコードがあります：
package com.mymedlinks.hybrid;
import java.util.TimeZone;
import org.apache.cordova.api.Plugin;
import org.apache.cordova.api.PluginResult;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.content.ContextWrapper;
import android.provider.Settings;
import android.util.Log;
public class SamplePlugin extends Plugin{
public String ACTION_POST_DATA="post_data";
@Override
public PluginResult execute(String arg0, JSONArray arg1, String arg2) {
// TODO Auto-generated method stub
PluginResult pluginRes;
if(ACTION_POST_DATA.equals(arg0)){
try {
pluginResult = imgsUpload(args.getString(0),
args.getString(1), args.getString(2));
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else{
pluginRes = new PluginResult(PluginResult.Status.INVALID_ACTION);;
}
return pluginRes;
}
private PluginResult imgsUpload(String date,String time,
String fileNames) {
PluginResult pluginResult=null;
HttpURLConnection conn = null;
DataOutputStream dos = null;
DataInputStream inStream = null;
ByteArrayOutputStream baos = null;
byte[] imgData = null;
String urlString = "https://www.mysampledata.com/upload_imgs.php";
//opening of http connection
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 buffr = new StringBuffer(msg);
buffr.append("-----------------------------1177141514664");
buffr.append(CrLf);
buffr.append("Content-Disposition: form-data; name=\"date\";"
+ CrLf);
buffr.append(CrLf);
buffr.append(date + CrLf);
buffr.append("-----------------------------1177141514664");
buffr.append(CrLf);
buffr.append("Content-Disposition: form-data; name=\"time\";"
+ CrLf);
buffr.append(CrLf);
buffr.append(time + CrLf);
buffr.append("-----------------------------1177141514664");
buffr.append(CrLf);
buffr.append("Content-Disposition: form-data; name=\"MAX_FILE_SIZE\";"
+ CrLf);
buffr.append(CrLf);
buffr.append("100000000072000" + CrLf);
buffr.append("-----------------------------1177141514664");
buffr.append(CrLf);
buffr.append("Content-Disposition: form-data; name=\"method\";"
+ CrLf);
buffr.append(CrLf);
buffr.append("upload.snapshots" + CrLf);
String msg1 = "";
StringBuffer buffr1 = new StringBuffer(msg1);
List<byte[]> byetsInfo = new ArrayList<byte[]>();
ArrayList<String> filenames = new ArrayList<String>();
try {
JSONObject jObj = new JSONObject(new String(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 + "/sample_app_images/" + img);
Uri ur = Uri.fromFile(f);
filenames.add(img);
Bitmap bmp;
try {
bmp = Media.getBitmap(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 buffr3 = new StringBuffer(msg3);
buffr3.append(CrLf);
buffr3.append("-----------------------------4664151417711--");
buffr3.append(CrLf);
conn.setChunkedStreamingMode(0);
for (int i = 0; i < byetsInfo.size(); i++) {
dos = new DataOutputStream(conn.getOutputStream());
buffr1.delete(0, buffr1.length());
buffr1.append("-----------------------------1177141514664");
buffr1.append(CrLf);
buffr1.append("Content-Disposition: form-data; name=\"snapshotUpload[]\"; filename=\""
+ filenames.get(i) + "\"" + CrLf);
buffr1.append("Content-Type: image/jpeg" + CrLf);
buffr1.append(CrLf);
dos.write(buffr.toString().getBytes());
dos.write(buffr1.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(buffr3.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();
}
String s=null;
// 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));
s+=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") && s!=null){
pluginResult = new PluginResult(PluginResult.Status.OK, s);
} else {
pluginResult = new PluginResult(PluginResult.Status.ERROR,
false);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return pluginResult;
}
}
上記のクラスに送信されるjsコードから取得したファイル名、日付、時刻であるコード内のデータ。Async Task を Phonegap 経由で呼び出す方法 (つまり、imgsUpload() で呼び出す方法) の例を教えてください。
どうもありがとう。