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urban-explorer
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Implemented "endless" listview for panoramio.

master
Tomasz Półgrabia 2016-09-11 22:56:25 +02:00
parent 3eb196f158
commit d428eaf397
6 changed files with 119 additions and 142 deletions
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2
app/src/main/java/pl/tpolgrabia/urbanexplorer/MainActivity.java
View File

@ -11,6 +11,7 @@ import android.view.GestureDetector;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.widget.LinearLayout;
import android.widget.Toast;
import com.crashlytics.android.Crashlytics;
import com.nostra13.universalimageloader.cache.memory.impl.WeakMemoryCache;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
@ -188,6 +189,7 @@ public class MainActivity extends ActionBarActivity implements GestureDetector.O
}
private void swipeDown() {
Toast.makeText(this, "Swiped down", Toast.LENGTH_SHORT).show();
}

197
app/src/main/java/pl/tpolgrabia/urbanexplorer/fragments/HomeFragment.java
View File

@ -8,6 +8,7 @@ import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.support.v4.app.Fragment;
import android.support.v4.widget.SwipeRefreshLayout;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
@ -24,7 +25,10 @@ import pl.tpolgrabia.urbanexplorer.dto.PanoramioImageInfo;
import pl.tpolgrabia.urbanexplorer.utils.NumberUtils;
import pl.tpolgrabia.urbanexplorer.utils.PanoramioUtils;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicBoolean;
import static android.content.Context.LOCATION_SERVICE;
@ -39,6 +43,7 @@ public class HomeFragment extends Fragment implements LocationListener {
private static final int LOCATION_SETTINGS_REQUEST_ID = 1;
private static final String LOCATIONS_LIST_IMAGE_SIZE = "medium";
private static final String LOCATIONS_ORDER = "popularity";
private static final int PANORAMIA_BULK_DATA_SIZE = 10;
private boolean gpsLocationEnabled;
private boolean networkLocationEnabled;
private boolean locationEnabled;
@ -49,14 +54,10 @@ public class HomeFragment extends Fragment implements LocationListener {
private boolean initialized = false;
private View inflatedView;
private TextView pageSizeWidget;
private TextView pageIdWidget;
private Long pageId = 1L;
private ListView locations;
private ImageView prevWidget;
private ImageView nextWidget;
private Long photosCount;
private TextView locationsResultInfo;
private Semaphore loading = new Semaphore(1, true);
private List<PanoramioImageInfo> photos = new ArrayList<>();
private boolean photosInitialized = false;
public HomeFragment() {
// Required empty public constructor
@ -77,6 +78,8 @@ public class HomeFragment extends Fragment implements LocationListener {
return;
}
// loading.release();
}
private Double safeParseDouble(CharSequence text) {
@ -97,11 +100,12 @@ public class HomeFragment extends Fragment implements LocationListener {
Bundle savedInstanceState) {
// Inflate the layout for this fragment
inflatedView = inflater.inflate(R.layout.fragment_home, container, false);
locations = (ListView)inflatedView.findViewById(R.id.locations);
ListView locations = (ListView)inflatedView.findViewById(R.id.locations);
final ListView finalLocations = locations;
locations.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> adapterView, View view, int pos, long rowId) {
PanoramioAdapter panAdapter = (PanoramioAdapter) locations.getAdapter();
PanoramioAdapter panAdapter = (PanoramioAdapter) finalLocations.getAdapter();
PanoramioImageInfo photoInfo = panAdapter.getItem(pos);
MainActivity activity = (MainActivity) getActivity();
activity.switchToPhoto(photoInfo);
@ -122,16 +126,27 @@ public class HomeFragment extends Fragment implements LocationListener {
int visibleItemCount,
int totalItemCount) {
if (firstVisibleItem <= 0) {
// scrolled to the top
Log.v(CLASS_TAG, "Scrolled to the top");
}
try {
if (firstVisibleItem + visibleItemCount >= totalItemCount) {
Log.v(CLASS_TAG, "Scrolled to the bottom");
// scrolled to the bottom
fetchAdditionalPhotos(firstVisibleItem, visibleItemCount);
if (firstVisibleItem <= 0) {
// scrolled to the top
Log.v(CLASS_TAG, "Scrolled to the top");
}
if (firstVisibleItem + visibleItemCount >= totalItemCount) {
Log.v(CLASS_TAG, "Scrolled to the bottom");
// scrolled to the bottom
final View fragView = getView();
if (fragView == null) {
Log.v(CLASS_TAG, "Frag still not initialized");
return;
}
fetchAdditionalPhotos();
}
} catch (InterruptedException e) {
Log.e(CLASS_TAG, "Aquiring lock interrupted exception", e);
}
}
@ -159,100 +174,64 @@ public class HomeFragment extends Fragment implements LocationListener {
// );
locations = (ListView)inflatedView.findViewById(R.id.locations);
inflatedView.findViewById(R.id.update_places).setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View view) {
fetchPanoramioLocations();
}
}
);
pageSizeWidget = (TextView) inflatedView.findViewById(R.id.locations_page_size);
pageIdWidget = (TextView) inflatedView.findViewById(R.id.locations_page_id);
pageIdWidget.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
Log.d(CLASS_TAG, "Before text changed");
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
pageId = Math.max(1, NumberUtils.safeParseLong(charSequence));
Log.d(CLASS_TAG, "text changed");
}
@Override
public void afterTextChanged(Editable editable) {
Log.d(CLASS_TAG, "After text changed");
}
});
pageSizeWidget.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
Log.d(CLASS_TAG, "Before text changed");
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
fetchPanoramioLocations();
Log.d(CLASS_TAG, "text changed");
}
@Override
public void afterTextChanged(Editable editable) {
Log.d(CLASS_TAG, "After text changed");
}
});
prevWidget = (ImageView)inflatedView.findViewById(R.id.prev);
nextWidget = (ImageView)inflatedView.findViewById(R.id.next);
prevWidget.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (pageId > 1) {
pageId--;
pageIdWidget.setText(Long.toString(pageId));
fetchPanoramioLocations();
}
}
});
nextWidget.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
pageId++;
pageIdWidget.setText(Long.toString(pageId));
fetchPanoramioLocations();
}
});
initialized = true;
fetchAdditionalPhotos(0, 10);
// try {
// fetchAdditionalPhotos(0, PANORAMIA_BULK_DATA_SIZE);
// } catch (InterruptedException e) {
// Log.e(CLASS_TAG, "Acquiring lock interrupted", e);
// }
// FIXME hardcoded values
return inflatedView;
}
private void fetchAdditionalPhotos(int firstVisibleItem, int visibleItemCount) {
private void fetchAdditionalPhotos() throws InterruptedException {
if (!initialized) {
Log.v(CLASS_TAG, "Fetching additional photos blocked till system is initialized");
return;
}
Log.v(CLASS_TAG, "Fetching additional photos");
Location location = locationService.getLastKnownLocation(locationProvider);
if (locationProvider == null) {
Log.i(CLASS_TAG, "Location providers not available");
Toast.makeText(getActivity(), "Location provicers not available", Toast.LENGTH_SHORT).show();
return;
}
if (getView() == null) {
Log.v(CLASS_TAG, "Application still not initialized");
return;
}
final Location location = locationService.getLastKnownLocation(locationProvider);
if (location == null) {
Log.i(CLASS_TAG, "Location still not available");
Toast.makeText(getActivity(), "Location still not available", Toast.LENGTH_SHORT).show();
return;
}
Log.v(CLASS_TAG, "Fetching additional photos. Trying loading acquirng lock");
if (!loading.tryAcquire()) {
Log.v(CLASS_TAG, "Fetching additional photos. Loading in progress");
return;
}
int offset = photos.size();
Log.v(CLASS_TAG, "Fetching additional photos offset: " + offset + ", count: " + PANORAMIA_BULK_DATA_SIZE);
Log.d(CLASS_TAG, "Fetching location using " + locationProvider + " provider");
PanoramioUtils.fetchPanoramioImages(
getActivity(),
location.getLatitude(),
location.getLongitude(),
fetchRadiusX(),
fetchRadiusY(),
(long)(firstVisibleItem + visibleItemCount),
(long)(offset + PANORAMIA_BULK_DATA_SIZE),
fetchLocationPageSize(),
new PanoramioResponseCallback() {
@Override
@ -263,21 +242,25 @@ public class HomeFragment extends Fragment implements LocationListener {
return;
}
PanoramioAdapter adapter = (PanoramioAdapter) locations.getAdapter();
if (adapter != null) {
adapter.addAll(images);
ListView locations = (ListView) getView().findViewById(R.id.locations);
ArrayAdapter<PanoramioImageInfo> adapter = (ArrayAdapter<PanoramioImageInfo>) locations.getAdapter();
photos.addAll(images);
if (adapter == null) {
locations.setAdapter(new PanoramioAdapter(getActivity(), R.id.list_item, images));
} else {
locations.setAdapter(new PanoramioAdapter(getActivity(),
R.layout.location_item,
images));
adapter.addAll(images);
}
// locations.setSelection(photos.size() - 1 - PANORAMIA_BULK_DATA_SIZE);
// TODO loading on end scroll should now working
// TODO we can remove pagination
// TODO we can think about removing first items also and last if the number
// TODO of items exceeds the limit (to save the memory)
Log.v(CLASS_TAG, "Finished loading additional photos");
Log.v(CLASS_TAG, "Finished Fetching additional photos count: " + photos.size());
photosInitialized = true;
loading.release();
}
}
@ -304,11 +287,11 @@ public class HomeFragment extends Fragment implements LocationListener {
Long pageSize = fetchLocationPageSize();
Long start = (pageId - 1) * pageSize + 1;
Long end = pageId * pageSize;
locationsResultInfo.setText("" + start + "-" + end + " from " + imagesCount);
ArrayAdapter<PanoramioImageInfo> adapter = new PanoramioAdapter(getActivity(),
R.layout.location_item,
images);
ListView locations = (ListView)getView().findViewById(R.id.locations);
locations.setAdapter(adapter);
}
}
@ -316,12 +299,7 @@ public class HomeFragment extends Fragment implements LocationListener {
}
private Long fetchLocationPageSize() {
final CharSequence sPageSize = pageSizeWidget != null ? pageSizeWidget.getText() : null;
return NumberUtils.safeParseLong(sPageSize);
}
private Long fetchLocationPageId() {
return Math.max(0L, NumberUtils.safeParseLong(pageIdWidget.getText()));
return new Long(PANORAMIA_BULK_DATA_SIZE);
}
private Double fetchRadiusX() {
@ -341,6 +319,13 @@ public class HomeFragment extends Fragment implements LocationListener {
double lng = location.getLongitude();
TextView locationInfo = (TextView) getActivity().findViewById(R.id.locationInfo);
locationInfo.setText("Location: (" + lat + "," + lng + ")");
if (!photosInitialized) {
try {
fetchAdditionalPhotos();
} catch (InterruptedException e) {
Log.e(CLASS_TAG, "Failed acquirng loading lock", e);
}
}
}
@Override

25
app/src/main/java/pl/tpolgrabia/urbanexplorer/workers/FetchingPhotosWorker.java Normal file
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@ -0,0 +1,25 @@
package pl.tpolgrabia.urbanexplorer.workers;
import android.os.AsyncTask;
import pl.tpolgrabia.urbanexplorer.fragments.HomeFragment;
/**
* Created by tpolgrabia on 11.09.16.
*/
public class FetchingPhotosWorker extends AsyncTask<Boolean, Integer, Boolean> {
private HomeFragment homeFragment;
public FetchingPhotosWorker(HomeFragment homeFragment) {
this.homeFragment = homeFragment;
}
@Override
protected Boolean doInBackground(Boolean... params) {
for (Boolean arg : params) {
}
return null;
}
}

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app/src/main/res/drawable/nav_right.png
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37
app/src/main/res/layout/fragment_home.xml
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@ -38,6 +38,7 @@
</LinearLayout>
<ListView
android:id="@+id/locations"
android:layout_width="match_parent"
@ -46,42 +47,6 @@
</ListView>
<TextView android:id="@+id/locations_result_info"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"/>
<LinearLayout android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center">
<ImageView android:id="@+id/prev"
android:layout_width="64dp"
android:layout_height="64dp"
android:background="@drawable/nav_left"/>
<EditText
android:id="@+id/locations_page_id"
android:layout_width="40dp"
android:gravity="center"
android:layout_height="match_parent"
android:text="1"/>
<EditText
android:id="@+id/locations_page_size"
android:layout_width="40dp"
android:gravity="center"
android:layout_height="match_parent"
android:text="10"/>
<ImageView android:id="@+id/next"
android:layout_width="64dp"
android:layout_height="64dp"
android:background="@drawable/nav_right"/>
</LinearLayout>
<Button android:id="@+id/update_places"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Fetch interesting places" />
</LinearLayout>