我面临一些奇怪的事情，我可以在link中看到我上传的图片，但它没有在应用中显示。但如果我在应用程序中输入另一个图像link。原因是什么？有人可以帮忙吗？
main_actvity
//Downloading data asynchronously
public class AsyncHttpTask extends AsyncTask<String, Void, Integer> {
@Override
protected Integer doInBackground(String... params) {
Integer result = 0;
try {
// Create Apache HttpClient
HttpClient httpclient = new DefaultHttpClient();
HttpResponse httpResponse = httpclient.execute(new HttpGet(params[0]));
int statusCode = httpResponse.getStatusLine().getStatusCode();
// 200 represents HTTP OK
if (statusCode == 200) {
String response = streamToString(httpResponse.getEntity().getContent());
parseResult(response);
result = 1; // Successful
} else {
result = 0; //"Failed
}
} catch (Exception e) {
Log.d(TAG, e.getLocalizedMessage());
}
return result;
}
@Override
protected void onPostExecute(Integer result) {
// Download complete. Let us update UI
if (result == 1) {
mGridAdapter.setGridData(mGridImages);
} else {
Toast.makeText(MainActivity.this, "No Connection found,Check your Connection!", Toast.LENGTH_SHORT).show();
}
mProgressBar.setVisibility(View.GONE);
}
}
String streamToString(InputStream stream) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream));
String line;
String result = "";
while ((line = bufferedReader.readLine()) != null) {
result += line;
}
// Close stream
if (null != stream) {
stream.close();
}
return result;
}
/**
* Parsing the feed results and get the list
* @param result
*/
private void parseResult(String result) {
try {
JSONObject response = new JSONObject(result);
JSONArray posts = response.optJSONArray("result");
GridImages item;
for (int i = 0; i < posts.length(); i++) {
JSONObject post = posts.optJSONObject(i);
String title = post.optString("name");
String image=post.optString("path");
item = new GridImages();
item.Settitle(title);
item.Setimage(image);
mGridImages.add(item);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
// The method that invoke of uploading images
public void openGallery() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), 1);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1 && resultCode == RESULT_OK && data != null && data.getData() != null) {
//file name
Uri selectedImage = data.getData();
Intent i = new Intent(this,
AddImage.class);
i.putExtra("imagePath", selectedImage.toString());
startActivity(i);
}
}
// the design of the action bar menu
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.activity_main_actions, menu);
return super.onCreateOptionsMenu(menu);
}
public boolean onOptionsItemSelected(MenuItem item)
{
super.onOptionsItemSelected(item);
switch (item.getItemId()){
case R.id.ic_action_person:
Toast.makeText(this, "Create a new account please", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(this, Register.class);
startActivity(intent);
return true;
case R.id.ic_action_search:
Toast.makeText(this, "Search for new images", Toast.LENGTH_SHORT).show();
Intent isearch= new Intent(this,Search.class);
startActivity(isearch);
return true;
case R.id.ic_action_picture:
Toast.makeText(this, "Search for new photos", Toast.LENGTH_SHORT).show();
Intent iphotos= new Intent(this,Display.class);
startActivity(iphotos);
return true;
case R.id.ic_add_photo:
Toast.makeText(this, "Search for new photos", Toast.LENGTH_SHORT).show();
openGallery();
return true;
}
return true;
}
}
addimage.java我在哪里上传图片
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
EditText captionetxt = (EditText) findViewById(R.id.caption);
caption = captionetxt.getText().toString();
//spinner
Spinner dropdown = (Spinner)findViewById(R.id.spinner1);
String[] items = new String[]{"Lebanese jokes", "Student Jokes", "Quotes"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, items);
dropdown.setAdapter(adapter);
categorie = dropdown.getSelectedItem().toString();
imageview = (ImageView) findViewById(R.id.imageView);
}
public void onclick(View view)
{
Toast.makeText(AddImage.this, "Uploading Image", Toast.LENGTH_LONG).show();
upload();
Intent i = new Intent(this,
MainActivity.class);
startActivity(i);
}
public void upload()
{
Calendar thisCal = Calendar.getInstance();
thisCal.getTimeInMillis();
Intent intent = getIntent();
String selectedImage= intent.getStringExtra("imagePath");
Uri fileUri = Uri.parse(selectedImage);
System.out.println(fileUri);
InputStream imageStream = null;
try {
imageStream = getContentResolver().openInputStream(fileUri);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
Bitmap bmp = BitmapFactory.decodeStream(imageStream);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 30, stream);
byte[] byteArray = stream.toByteArray();
Bitmap bitmap = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
imageview.setImageBitmap(bitmap);
int width = bitmap.getWidth();
int height = bitmap.getHeight();
System.out.println(width);
System.out.println(height);
getResizedBitmap( bitmap, 200);
try {
stream.close();
stream = null;
} catch (IOException e) {
e.printStackTrace();
}
String image_str = Base64.encodeBytes(byteArray);
final ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("image",image_str));
nameValuePairs.add(new BasicNameValuePair("caption",caption));
nameValuePairs.add(new BasicNameValuePair("name","je"));
nameValuePairs.add(new BasicNameValuePair("categorie",categorie));
Thread t = new Thread(new Runnable() {
@Override
public void run() {
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://justedhak.comlu.com/images/upload_image.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
final String the_string_response = convertResponseToString(response);
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(AddImage.this, "Response " + the_string_response, Toast.LENGTH_LONG).show();
}
});
}catch(final Exception e){
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(AddImage.this, "ERROR " + e.getMessage(), Toast.LENGTH_LONG).show();
}
});
System.out.println("Error in http connection "+e.toString());
}
}
});
t.start();
}
public String convertResponseToString(HttpResponse response) throws IllegalStateException, IOException{
String res = "";
StringBuffer buffer = new StringBuffer();
inputStream = response.getEntity().getContent();
final int contentLength = (int) response.getEntity().getContentLength(); //getting content length…..
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(AddImage.this, "contentLength : " + contentLength, Toast.LENGTH_LONG).show();
}
});
if (contentLength < 0){
}
else{
byte[] data = new byte[512];
int len = 0;
try
{
while (-1 != (len = inputStream.read(data)) )
{
buffer.append(new String(data, 0, len)); //converting to string and appending to stringbuffer…..
}
}
catch (IOException e)
{
e.printStackTrace();
}
try
{
inputStream.close(); // closing the stream…..
}
catch (IOException e)
{
e.printStackTrace();
}
res = buffer.toString(); // converting stringbuffer to string…..
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(AddImage.this, "Result : res", Toast.LENGTH_LONG).show();
}
});
//System.out.println("Response => " + EntityUtils.toString(response.getEntity()));
}
return res;
}
public Bitmap getResizedBitmap(Bitmap image, int maxSize) {
int width = image.getWidth();
int height = image.getHeight();
float bitmapRatio = (float)width / (float) height;
if (bitmapRatio > 0) {
width = maxSize;
height = (int) (width / bitmapRatio);
} else {
height = maxSize;
width = (int) (height * bitmapRatio);
}
return Bitmap.createScaledBitmap(image, width, height, true);
}
}
main xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<EditText
android:id="@+id/caption"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="10dp"
android:hint="Insert a caption" />
<Spinner
android:id="@+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/caption"
android:paddingLeft="10dp"
android:background="@android:drawable/btn_dropdown"
android:spinnerMode="dropdown" />
<Button
android:id="@+id/btn1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/spinner1"
android:layout_weight="1"
android:text="Post"
android:onClick="onclick" />
<ImageView
android:id="@+id/imageView"
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_below="@+id/btn1"
android:paddingLeft="20dp"/>
</RelativeLayout>
mgridadapter
public class GridImageMainAdapter extends ArrayAdapter<GridImages> {
private Context mContext;
private int layoutResourceId;
private ArrayList<GridImages> mGridImages = new ArrayList<GridImages>();
public GridImageMainAdapter(Context mContext, int layoutResourceId, ArrayList<GridImages> mGridImages) {
super(mContext, layoutResourceId, mGridImages);
this.layoutResourceId = layoutResourceId;
this.mContext = mContext;
this.mGridImages = mGridImages;
}
/**
* Updates grid data and refresh grid items.
* @param mGridData
*/
public void setGridData(ArrayList<GridImages> mGridImages) {
this.mGridImages = mGridImages;
notifyDataSetChanged();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder holder;
if (BuildConfig.DEBUG) {
Picasso.with(mContext).setIndicatorsEnabled(true);
Picasso.with(mContext).setLoggingEnabled(true);
}
if (row == null) {
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new ViewHolder();
holder.titleTextView = (TextView) row.findViewById(R.id.grid_item_title);
holder.imageView = (ImageView) row.findViewById(R.id.grid_item_image);
row.setTag(holder);
} else {
holder = (ViewHolder) row.getTag();
}
GridImages item = mGridImages.get(position);
holder.titleTextView.setText(Html.fromHtml(item.Gettitle()));
Picasso.
with(mContext).
load(item.Getimage())
.placeholder(R.drawable.ic_launcher) // can also be a drawable
.fit() // will explain later
.into(holder.imageView);
return row;
}
static class ViewHolder {
TextView titleTextView;
ImageView imageView;
}
}
答案 0 :(得分：1)
更改gridview数据后添加mGridAdapter.notifyDatasetChange()