我正在编写一个应用程序，其中我正在显示列表视图项目的状态，这里：我正在显示 SD 卡图像，并允许用户单击上传按钮将图像上传到服务器，并显示结果，例如：如果上传完成到服务器然后显示上传完成，如果用户已经上传到服务器然后显示已经上传但是每当用户点击上传按钮时，但现在我想显示图像的状态，每当列表加载时，请参见下面的屏幕截图：
上传活动.java：
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_uploads);
// Permission StrictMode
if (android.os.Build.VERSION.SDK_INT > 9)
{
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
// click to create new event
btn_previous_activity = (Button) findViewById(R.id.btn_previous_activity);
btn_previous_activity.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// using Intent to call EventListActivity
Intent intentNewEvent = new Intent(UploadActivity.this, EventListActivity.class);
startActivity(intentNewEvent);
}
});
/*** Get Images from SDCard ***/
ImageList = getSD();
Log.d(UploadActivity.LOG_TAG, "getSD() :::--- " + ImageList);
// ListView and imageAdapter
lstView = (ListView) findViewById(R.id.listView1);
lstView.setAdapter(new ImageAdapter(this));
}
private List <String> getSD()
{
List <String> it = new ArrayList <String>();
String string = "/mnt/sdcard/Pictures/MyNewImages/";
File f = new File (string+ SingleAngelActivity.customFolder+ "/");
Log.d(UploadActivity.LOG_TAG, "KEY_TITLE :::--- " + f);
File[] files = f.listFiles ();
Log.d(UploadActivity.LOG_TAG, "getListImages() :::--- " + files);
for (int i = 0; i <files.length; i++)
{
File file = files[i];
Log.d(UploadActivity.LOG_TAG, "i<files.length() :::--- " + i);
Log.d("Count",file.getPath());
it.add (file.getPath());
}
Log.d(UploadActivity.LOG_TAG, "List <String> it :::--- " + it);
return it;
}
//Upload
public void startUpload(final int position) {
Runnable runnable = new Runnable() {
public void run() {
handler.post(new Runnable() {
public void run() {
View v = lstView.getChildAt(position - lstView.getFirstVisiblePosition());
// Show ProgressBar
ProgressBar progress = (ProgressBar)v.findViewById(R.id.progressBar);
progress.setVisibility(View.VISIBLE);
// Status
TextView status = (TextView)v.findViewById(R.id.ColStatus);
status.setText("Uploading..");
new UploadFileAsync().execute(String.valueOf(position));
}
});
}
};
new Thread(runnable).start();
}
// Async Upload
public class UploadFileAsync extends AsyncTask<String, Void, Void> {
String resServer;
int position;
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Void doInBackground(String... params) {
// TODO Auto-generated method stub
position = Integer.parseInt(params[0]);
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
int resCode = 0;
String resMessage = "";
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
// File Path
String strSDPath = ImageList.get(position).toString();
// Upload to PHP Script
String strUrlServer = "http://10.0.2.2/res/files.php";
try {
/** Check file on SD Card ***/
File file = new File(strSDPath);
if(!file.exists())
{
resServer = "{\"StatusID\":\"0\",\"Error\":\"Please check path on SD Card\"}";
return null;
}
FileInputStream fileInputStream = new FileInputStream(new File(strSDPath));
URL url = new URL(strUrlServer);
HttpURLConnection 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=" + boundary);
DataOutputStream outputStream = new DataOutputStream(conn
.getOutputStream());
outputStream.writeBytes(twoHyphens + boundary + lineEnd);
outputStream
.writeBytes("Content-Disposition: form-data; name=\"filUpload\";filename=\""
+ strSDPath + "\"" + lineEnd);
outputStream.writeBytes(lineEnd);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// Read file
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
outputStream.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
outputStream.writeBytes(lineEnd);
outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// Response Code and Message
resCode = conn.getResponseCode();
if(resCode == HttpURLConnection.HTTP_OK)
{
InputStream is = conn.getInputStream();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
int read = 0;
while ((read = is.read()) != -1) {
bos.write(read);
}
byte[] result = bos.toByteArray();
bos.close();
resMessage = new String(result);
}
Log.d("resCode=",Integer.toString(resCode));
Log.d("resMessage=",resMessage.toString());
fileInputStream.close();
outputStream.flush();
outputStream.close();
resServer = resMessage.toString();
} catch (Exception ex) {
// Exception handling
return null;
}
return null;
}
protected void onPostExecute(Void unused) {
statusWhenFinish(position,resServer);
}
}
// when upload finish
protected void statusWhenFinish(int position, String resServer) {
View v = lstView.getChildAt(position - lstView.getFirstVisiblePosition());
// Show ProgressBar
ProgressBar progress = (ProgressBar)v.findViewById(R.id.progressBar);
progress.setVisibility(View.GONE);
// Status
TextView status = (TextView)v.findViewById(R.id.ColStatus);
/*** Default Value ***/
String strStatusID = "0";
String strMessage = "File Exists!";
try {
JSONObject c = new JSONObject(resServer);
strStatusID = c.getString("StatusID");
strMessage = c.getString("Message");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Prepare Status
if(strStatusID.equals("0"))
{
status.setText( strMessage );
status.setTextColor(Color.RED);
// Enabled Button again
Button btnUpload = (Button) v.findViewById(R.id.btnUpload);
btnUpload.setText("Already Uploaded");
btnUpload.setTextColor(Color.RED);
btnUpload.setEnabled(true);
}
else
{
status.setText("Upload Completed.");
status.setTextColor(Color.GREEN);
}
}