2
URLからの画像を自分のアプリケーションにギャラリーとして表示したい。 私は参考にこれを使用しました。RecyclerViewに画像が表示されない
http://www.androidhive.info/2016/04/android-glide-image-library-building-image-gallery-app/
しかし、画像は表示されません。
これは私のGalleryActivity
public class GalleryActivity extends AppCompatActivity {
String strServerResponse;
ProgressDialog nDialog;
private GalleryAdapter mAdapter;
private RecyclerView recyclerView;
private ArrayList<Image> images;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gallery);
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
images = new ArrayList<>();
new NetCheck().execute();
}
private class NetCheck extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
nDialog = new ProgressDialog(GalleryActivity.this);
nDialog.setMessage("Loading..");
nDialog.setTitle("Please Wait");
nDialog.setIndeterminate(false);
nDialog.setCancelable(true);
nDialog.show();
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
Log.e("Post exec calleld", "dfds");
nDialog.dismiss();
mAdapter = new GalleryAdapter(getApplicationContext(), images);
RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getApplicationContext(), 2);
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(mAdapter);
}
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpRequest = new HttpPost(
uril);
httpRequest.setHeader("Content-Type", "application/json");
JSONObject json = new JSONObject();
StringEntity se = new StringEntity(json.toString());
se.setContentEncoding("UTF-8");
se.setContentType("application/json");
httpRequest.setEntity(se);
HttpResponse httpRes = httpClient.execute(httpRequest);
java.io.InputStream inputStream = httpRes.getEntity()
.getContent();
InputStreamReader inputStreamReader = new InputStreamReader(
inputStream);
BufferedReader reader = new BufferedReader(inputStreamReader);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
inputStream.close();
strServerResponse = sb.toString();
Log.e("Server Response", "" + strServerResponse.toString());
if (strServerResponse != null) {
try {
JSONObject jsonObj = new JSONObject(strServerResponse);
String status = jsonObj.getString("status");
if (status.equals("true")) {
String result = jsonObj.getString("images");
Log.e("images", "" + eee);
JSONArray arr1 = new JSONArray(result);
JSONObject jsonObj1 = arr1.getJSONObject(0);
Image image = new Image();
for (int i = 0; i < arr1.length(); i++) {
JSONObject jobjj11 = arr1
.getJSONObject(i);
String name = jobjj11.optString("name");
Log.e("nurl",""+name);
image.setSmall(""+name);
images.add(image);
Log.e("images.tostring",""+images.toString());
}
}
else if (status.equals("false")){
Handler handler = new Handler(Looper.getMainLooper());
handler.post(
new Runnable() {
@Override
public void run() {
AlertDialog alertDialog = new AlertDialog.Builder(
GalleryActivity.this).create();
alertDialog.setMessage("No imagesFound");
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
alertDialog.show();
}
}
);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Handler handler = new Handler(Looper.getMainLooper());
handler.post(
new Runnable() {
@Override
public void run() {
AlertDialog alertDialog = new AlertDialog.Builder(
GalleryActivity.this).create();
alertDialog.setMessage("Error Connecting to Server");
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
alertDialog.show();
}
});
//Log.e("ServiceHandler", "Couldn't get any data from the url");
}
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}
されており、この私のGalleryAdapter
public class GalleryAdapter extends RecyclerView.Adapter<GalleryAdapter.MyViewHolder> {
private List<Image> images;
private Context mContext;
public class MyViewHolder extends RecyclerView.ViewHolder {
public ImageView thumbnail;
public MyViewHolder(View view) {
super(view);
thumbnail = (ImageView) view.findViewById(R.id.thumbnail);
}
}
public GalleryAdapter(Context context, List<Image> images) {
Log.e("ingalleryadapter", "aaddd");
mContext = context;
this.images = images;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.gallery_thumbnail, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Image image = images.get(position);
Glide.with(mContext).load(image.getSmall())
.thumbnail(0.5f)
.crossFade()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(holder.thumbnail);
}
@Override
public int getItemCount() {
return images.size();
}
public interface ClickListener {
void onClick(View view, int position);
void onLongClick(View view, int position);
}
public static class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private GalleryAdapter.ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final GalleryAdapter.ClickListener clickListener) {
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
@Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null) {
clickListener.onLongClick(child, recyclerView.getChildPosition(child));
}
}
});
}
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
clickListener.onClick(child, rv.getChildPosition(child));
}
return false;
}
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
}
}
は、画像が表示されません。ここで何が間違っていますか？
URLが存在するかどうかを確認し、プレースホルダ画像 – USKMobility
を使用してみてください。@USKMobility私はチェックしました。 URLが存在します。 – Priyanka
[これ]（http://stackoverflow.com/questions/28992929/recyclerview-not-calling-oncreateviewholder-or-onbindview）[this（http://stackoverflow.com/questions/32463236/recyclerview-adapters） -oncreateviewholder-and-onbindviewholder-methods-not-g）と[this]（http://stackoverflow.com/questions/28115553/recyclerview-not-call-any-adapter-method-oncreateviewholder-onbindviewholder） –