我正在尝试从我的UploadActivity中选择上传一些图片。
public static int count;
private Bitmap[] thumbnails;
private boolean[] thumbnailsselection;
private String[] arrPath;
private ImageAdapter imageAdapter;
private static final int PICK_FROM_CAMERA = 1;
ArrayList<String> IPath = new ArrayList<String>();
public static Uri uri;
TextView msgLoading;
//ProgressBar pBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_upload);
msgLoading = (TextView) findViewById(R.id.msgLoading);
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
final Cursor imagecursor = getImageCursor();
GridView imagegrid = (GridView) findViewById(R.id.PhoneImageGrid);
imageAdapter = new ImageAdapter();
imagegrid.setAdapter(imageAdapter);
imagecursor.close();
msgLoading.setVisibility(View.GONE);
}
},100);
final Button uploadBtn = (Button) findViewById(R.id.uploadDONE);
uploadBtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
final int len = thumbnailsselection.length;
int cnt = 0;
String selectImages = "";
for (int i = 0; i < len; i++) {
if (thumbnailsselection[i]) {
cnt++;
selectImages = arrPath[i];
IPath.add(selectImages);
}
}
if (cnt == 0) {
Toast.makeText(getApplicationContext(),
"Please select at least one image",
Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(),
"You've selected Total " + cnt + " image(s).",
Toast.LENGTH_LONG).show();
Log.i("SelectedImages", String.valueOf(selectImages.toCharArray()));
Intent intentMessage = new Intent(UploadActivity.this,
ImagesForAds.class);
intentMessage.putStringArrayListExtra("IMAGE", IPath);
startActivity(intentMessage);
}
}
});
}
@NonNull
private Cursor getImageCursor() {
final String[] columns = { MediaStore.Images.Media.DATA,
MediaStore.Images.Media._ID };
final String orderBy = MediaStore.Images.Media._ID;
final Cursor imagecursor = managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null,
null, orderBy);
final int image_column_index = imagecursor
.getColumnIndex(MediaStore.Images.Media._ID);
this.count = imagecursor.getCount();
this.thumbnails = new Bitmap[this.count];
this.arrPath = new String[this.count];
this.thumbnailsselection = new boolean[this.count];
for (int i = 0; i < this.count; i++) {
imagecursor.moveToPosition(i);
int id = imagecursor.getInt(image_column_index);
int dataColumnIndex = imagecursor
.getColumnIndex(MediaStore.Images.Media.DATA);
thumbnails[i] = MediaStore.Images.Thumbnails.getThumbnail(
getApplicationContext().getContentResolver(), id,
MediaStore.Images.Thumbnails.MICRO_KIND, null);
arrPath[i] = imagecursor.getString(dataColumnIndex);
}
return imagecursor;
}
public class ImageAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public ImageAdapter() {
mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return count;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.galleryitem, null);
holder.imageview = (ImageView) convertView
.findViewById(R.id.thumbImage);
holder.checkbox = (CheckBox) convertView
.findViewById(R.id.itemCheckBox);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.checkbox.setId(position);
holder.imageview.setId(position);
holder.checkbox.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
CheckBox cb = (CheckBox) v;
int id = cb.getId();
if (thumbnailsselection[id]) {
cb.setChecked(false);
thumbnailsselection[id] = false;
} else {
cb.setChecked(true);
thumbnailsselection[id] = true;
}
}
});
holder.imageview.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
int id = v.getId();
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file://" + arrPath[id]),
"image/*");
startActivity(intent);
}
});
holder.imageview.setImageBitmap(thumbnails[position]);
holder.checkbox.setChecked(thumbnailsselection[position]);
holder.id = position;
return convertView;
}
}
class ViewHolder {
ImageView imageview;
CheckBox checkbox;
int id;
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
Intent i = new Intent(UploadActivity.this, ImagesForAds.class);
UploadActivity.this.finish();
startActivity(i);
super.onBackPressed();
}
并且它工作正常，我可以将数据备份到我的主要活动，如下所示：
b = getIntent().getExtras();
if (b != null) {
ImgData = b.getStringArrayList("IMAGE");
for (int i = 0; i < ImgData.size(); i++) {
map.add(ImgData.get(i).toString());
}
}
现在没关系......我需要上传我选择的那些图片，这是我的asyncTask：
public class ImageUploadTask extends AsyncTask<String, Void, String> {
String sResponse = null;
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
dialog = ProgressDialog.show(ImagesForAds.this, "Uploading",
"Please wait...", true);
dialog.show();
}
@Override
protected String doInBackground(String... params) {
try {
String url = "myLink";
int i = Integer.parseInt(params[0]);
Bitmap bitmap = decodeFile(map.get(i));
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost(url);
entity = new MultipartEntity();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos);
byte[] data = bos.toByteArray();
//entity.addPart("user_id", new StringBody("199"));
//entity.addPart("club_id", new StringBody("10"));
entity.addPart("images", new ByteArrayBody(data,
"image/jpeg", params[1]));
Log.i(TAG, "array map: " + map.get(i));
httpPost.setEntity(entity);
HttpResponse response = httpClient.execute(httpPost,
localContext);
sResponse = EntityUtils.getContentCharSet(response.getEntity());
System.out.println("sResponse : " + sResponse);
} catch (Exception e) {
if (dialog.isShowing())
dialog.dismiss();
Log.e(e.getClass().getName(), e.getMessage(), e);
}
return sResponse;
}
@Override
protected void onPostExecute(String sResponse) {
try {
if (dialog.isShowing())
dialog.dismiss();
if (sResponse != null) {
Toast.makeText(getApplicationContext(),
sResponse + " Photo uploaded successfully",
Toast.LENGTH_SHORT).show();
count++;
if (count < map.size()) {
new ImageUploadTask().execute(count + "", "hm" + count
+ ".jpg");
}
}
} catch (Exception e) {
Toast.makeText(getApplicationContext(), e.getMessage(),
Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
}
}
}
以及我如何调用它：
int count = 0;
new ImageUploadTask().execute(count + "", "pk" + count + ".jpg");
AsyncTask的问题..它只上传了1张图片，我如何上传我选择的所有图片？
答案 0 :(得分：0)
这是你的缺陷：
if (count < map.size()) {
new ImageUploadTask().execute(count + "", "hm" + count
+ ".jpg");
}
在ImageUploadTask中创建新的ImageUploadTask不是一个好主意。 在doInBackground（）中移动你的for循环并更新用户使用publishProgress（）并在onProgressUpdate中捕获该事件。
详细了解AsyncTask：https://developer.android.com/reference/android/os/AsyncTask.html