I am make scanner barecode it black screen instead of camera

I am make scanner barecode it black screen instead of camera - java

I have tried to create a barcode scanner in my application. But it doesn't show the camera, it shows a black screen last week, it still works. How can I solve this. My code is here
public class ScanBarcodeCartActivity extends AppCompatActivity {
private SurfaceView surfaceView;
private CameraSource cameraSource;
private TextView text_code,re_scan;
private Button btn_confirm_cart;
private BarcodeDetector barcodeDetector;
private String id_order;
private String phone;
private String cart,dateid,date;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scan_barcode_cart);
surfaceView = findViewById(R.id.camera_preview);
text_code = findViewById(R.id.text_code);
btn_confirm_cart = findViewById(R.id.confirm_cart);
re_scan = findViewById(R.id.re_scan);
barcodeDetector = new BarcodeDetector.Builder(this)
.setBarcodeFormats(
Barcode.QR_CODE
).build();
cameraSource = new CameraSource.Builder(this,barcodeDetector)
.setRequestedPreviewSize(640,480).setAutoFocusEnabled(true).build();
surfaceView.getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
return;
}
try {
cameraSource.start(holder);
}catch (IOException e){
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
cameraSource.stop();
}
});
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> qrcode = detections.getDetectedItems();
if (qrcode.size() != 0) {
text_code.post(new Runnable() {
#Override
public void run() {
text_code.setText(qrcode.valueAt(0).displayValue);
}
});
}
}
});
}
}
I've tried many methods and still can't.
I don't know if it's because of the camera or surface view.
And thanks for the advice.

Related

Is it possible to set ViewPager inside a fragment class?

I have a Fragment class and an Activity class which is related to that fragment, ViewPager has been initialized inside the Activity of MizActivity
My question is it possible to move ViewPager initialization from Activity class to the Fragment class So that I have better control?
Thanks in advance
Fragment
#SuppressLint("InflateParams") public class TvShowEpisodeDetailsFragment extends Fragment {
TextClicked mCallback;
public interface TextClicked{
void sendText(int position);
}
private Activity mContext;
private TvShowEpisode mEpisode;
private ImageView mBackdrop, mEpisodePhoto;
private TextView mTitle, mDescription, mFileSource, mAirDate, mRating, mDirector, mWriter, mGuestStars, mSeasonEpisodeNumber;
private View mDetailsArea;
private Picasso mPicasso;
private Typeface mMediumItalic, mMedium, mCondensedRegular;
private DbAdapterTvShowEpisodes mDatabaseHelper;
private long mVideoPlaybackStarted, mVideoPlaybackEnded;
private boolean mShowFileLocation;
private Bus mBus;
private int mToolbarColor = 0;
private FloatingActionButton mFab;
private PaletteLoader mPaletteLoader;
private ObservableScrollView mScrollView;
private RecyclerView mEpisodesList;
private String mShowId;
private ArrayList<TvShowEpisode> mEpisodes = new ArrayList<TvShowEpisode>();
private static final String SHOW_ID = "showId";
private RecyclerView recyclerView;
private RecyclerView.Adapter adapter;
private RecyclerView.LayoutManager layoutManager;
private ViewPager mViewPager;
public PlanetAdapter.OnItemClickListener listener;
/**
* Empty constructor as per the Fragment documentation
*/
public TvShowEpisodeDetailsFragment() {}
public static TvShowEpisodeDetailsFragment newInstance(String showId, int season, int episode) {
TvShowEpisodeDetailsFragment pageFragment = new TvShowEpisodeDetailsFragment();
Bundle bundle = new Bundle();
bundle.putString("showId", showId);
bundle.putInt("season", season);
bundle.putInt("episode", episode);
pageFragment.setArguments(bundle);
return pageFragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
setHasOptionsMenu(true);
mContext = getActivity();
mBus = MizuuApplication.getBus();
mShowFileLocation = PreferenceManager.getDefaultSharedPreferences(getActivity()).getBoolean(SHOW_FILE_LOCATION, true);
mPicasso = MizuuApplication.getPicassoDetailsView(getActivity());
mMediumItalic = TypefaceUtils.getRobotoMediumItalic(mContext);
mMedium = TypefaceUtils.getRobotoMedium(mContext);
mCondensedRegular = TypefaceUtils.getRobotoCondensedRegular(mContext);
mDatabaseHelper = MizuuApplication.getTvEpisodeDbAdapter();
// initializing mEpisodes
mShowId = getActivity().getIntent().getExtras().getString(SHOW_ID);
Cursor cursor = mDatabaseHelper.getEpisodes(mShowId);
try {
while (cursor.moveToNext()) {
mEpisodes.add(new TvShowEpisode(mContext, mShowId,
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_TITLE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_PLOT)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_SEASON)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_AIRDATE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_DIRECTOR)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_WRITER)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_GUESTSTARS)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_RATING)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_HAS_WATCHED)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_FAVOURITE))
));
}
} catch (Exception e) {
} finally {
cursor.close();
} // mEpisodes initialized
LocalBroadcastManager.getInstance(mContext).registerReceiver(mBroadcastReceiver,
new IntentFilter(LocalBroadcastUtils.UPDATE_TV_SHOW_EPISODE_DETAILS_OVERVIEW));
loadEpisode();
}
#Override
public void onDestroy() {
super.onDestroy();
LocalBroadcastManager.getInstance(mContext).unregisterReceiver(mBroadcastReceiver);
}
private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
loadEpisode();
loadData();
}
};
private void loadEpisode() {
if (!getArguments().getString("showId").isEmpty() && getArguments().getInt("season") >= 0 && getArguments().getInt("episode") >= 0) {
Cursor cursor = mDatabaseHelper.getEpisode(getArguments().getString("showId"), getArguments().getInt("season"), getArguments().getInt("episode"));
if (cursor.moveToFirst()) {
mEpisode = new TvShowEpisode(getActivity(),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_SHOW_ID)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_TITLE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_PLOT)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_SEASON)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_AIRDATE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_DIRECTOR)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_WRITER)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_GUESTSTARS)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_RATING)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_HAS_WATCHED)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_FAVOURITE))
);
mEpisode.setFilepaths(MizuuApplication.getTvShowEpisodeMappingsDbAdapter().getFilepathsForEpisode(
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_SHOW_ID)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_SEASON)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE))
));
}
cursor.close();
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.episode_details, container, false);
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// This makes sure that the container activity has implemented
// the callback interface. If not, it throws an exception
try {
mCallback = (TextClicked) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement TextClicked");
}
}
#Override
public void onViewCreated(final View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mBackdrop = (ImageView) view.findViewById(R.id.imageBackground);
mEpisodePhoto = (ImageView) view.findViewById(R.id.episodePhoto);
mDetailsArea = view.findViewById(R.id.details_area);
mTitle = (TextView) view.findViewById(R.id.movieTitle);
mSeasonEpisodeNumber = (TextView) view.findViewById(R.id.textView7);
mDescription = (TextView) view.findViewById(R.id.textView2);
mFileSource = (TextView) view.findViewById(R.id.textView3);
mAirDate = (TextView) view.findViewById(R.id.textReleaseDate);
mRating = (TextView) view.findViewById(R.id.textView12);
mDirector = (TextView) view.findViewById(R.id.director);
mWriter = (TextView) view.findViewById(R.id.writer);
mGuestStars = (TextView) view.findViewById(R.id.guest_stars);
mScrollView = (ObservableScrollView) view.findViewById(R.id.observableScrollView);
mFab = (FloatingActionButton) view.findViewById(R.id.fab);
// setting RecyclerView
mEpisodesList = (RecyclerView) view.findViewById(R.id.episodesLIST);
// getting episodeslist
ArrayList<PlanetModel> episodeslist = new ArrayList<>();
for(TvShowEpisode e : mEpisodes){
episodeslist.add(new PlanetModel(e.mEpisode));
}
// Setting LinearLayoutManager
LinearLayoutManager layoutManager
= new LinearLayoutManager(mContext.getApplicationContext(), LinearLayoutManager.HORIZONTAL, false);
//mEpisodesList.setLayoutManager(new LinearLayoutManager(mContext));
mEpisodesList.setLayoutManager(layoutManager);
// Setting RecyclerView Adapter
mEpisodesList.setAdapter(new PlanetAdapter(episodeslist, new PlanetAdapter.OnItemClickListener() {
#Override public void onItemClick(String item) {
SharedPreferences getPref = getActivity ().getSharedPreferences("PlanetAdapter", Context.MODE_PRIVATE);
int pos = getPref.getInt("newPosition",0);
mCallback.sendText(pos);
}
}));
mFab.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
ViewUtils.animateFabJump(v, new SimpleAnimatorListener() {
#Override
public void onAnimationEnd(Animator animation) {
play();
}
});
}
});
if (MizLib.isTablet(mContext))
mFab.setType(FloatingActionButton.TYPE_NORMAL);
final int height = MizLib.getActionBarAndStatusBarHeight(getActivity());
mScrollView = (ObservableScrollView) view.findViewById(R.id.observableScrollView);
mScrollView.setOnScrollChangedListener(new OnScrollChangedListener() {
#Override
public void onScrollChanged(ScrollView who, int l, int t, int oldl, int oldt) {
final int headerHeight = mEpisodePhoto.getHeight() - height;
final float ratio = (float) Math.min(Math.max(t, 0), headerHeight) / headerHeight;
final int newAlpha = (int) (ratio * 255);
mBus.post(new BusToolbarColorObject(mToolbarColor, newAlpha));
if (MizLib.isPortrait(mContext)) {
// Such parallax, much wow
mEpisodePhoto.setPadding(0, (int) (t / 1.5), 0, 0);
}
}
});
mScrollView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
ViewUtils.setLayoutParamsForDetailsEmptyView(mContext, view,
mBackdrop, mScrollView, this);
}
});
loadData();
mPicasso.load(mEpisode.getEpisodePhoto()).placeholder(R.drawable.bg).config(MizuuApplication.getBitmapConfig()).into(mEpisodePhoto, new Callback() {
#Override
public void onError() {
if (!isAdded())
return;
int width = getActivity().getResources().getDimensionPixelSize(R.dimen.episode_details_background_overlay_width);
int height = getActivity().getResources().getDimensionPixelSize(R.dimen.episode_details_background_overlay_height);
mPicasso.load(mEpisode.getTvShowBackdrop()).placeholder(R.drawable.bg).error(R.drawable.nobackdrop).resize(width, height).config(MizuuApplication.getBitmapConfig()).into(mEpisodePhoto);
}
#Override
public void onSuccess() {
if (mPaletteLoader == null) {
mPaletteLoader = new PaletteLoader(mPicasso, Uri.fromFile(mEpisode.getEpisodePhoto()), new PaletteLoader.OnPaletteLoadedCallback() {
#Override
public void onPaletteLoaded(int swatchColor) {
mToolbarColor = swatchColor;
}
});
mPaletteLoader.addView(mDetailsArea);
mPaletteLoader.setFab(mFab);
mPaletteLoader.execute();
} else {
// Clear old views after configuration change
mPaletteLoader.clearViews();
// Add views after configuration change
mPaletteLoader.addView(mDetailsArea);
mPaletteLoader.setFab(mFab);
// Re-color the views
mPaletteLoader.colorViews();
}
}
});
if (!MizLib.isPortrait(getActivity()))
mPicasso.load(mEpisode.getEpisodePhoto()).placeholder(R.drawable.bg).error(R.drawable.bg).transform(new BlurTransformation(getActivity().getApplicationContext(), mEpisode.getEpisodePhoto().getAbsolutePath() + "-blur", 4)).into(mBackdrop, new Callback() {
#Override public void onError() {
if (!isAdded())
return;
mPicasso.load(mEpisode.getTvShowBackdrop()).placeholder(R.drawable.bg).error(R.drawable.nobackdrop).transform(new BlurTransformation(getActivity().getApplicationContext(), mEpisode.getTvShowBackdrop().getAbsolutePath() + "-blur", 4)).into(mBackdrop, new Callback() {
#Override
public void onError() {}
#Override
public void onSuccess() {
if (!isAdded())
return;
mBackdrop.setColorFilter(Color.parseColor("#aa181818"), android.graphics.PorterDuff.Mode.SRC_OVER);
}
});
}
#Override
public void onSuccess() {
if (!isAdded())
return;
mBackdrop.setColorFilter(Color.parseColor("#aa181818"), android.graphics.PorterDuff.Mode.SRC_OVER);
}
});
}
#Override
public void onDetach() {
mCallback = null; // => avoid leaking, thanks #Deepscorn
super.onDetach();
}
private void loadData() {
// Set the episode title
mTitle.setVisibility(View.VISIBLE);
mTitle.setText(mEpisode.getTitle());
mTitle.setTypeface(mCondensedRegular);
mDescription.setTypeface(mCondensedRegular);
mFileSource.setTypeface(mCondensedRegular);
mDirector.setTypeface(mCondensedRegular);
mWriter.setTypeface(mCondensedRegular);
mGuestStars.setTypeface(mCondensedRegular);
mAirDate.setTypeface(mMedium);
mRating.setTypeface(mMedium);
mSeasonEpisodeNumber.setTypeface(mMediumItalic);
mSeasonEpisodeNumber.setText(getString(R.string.showSeason) + " " + mEpisode.getSeason() + ", " + getString(R.string.showEpisode) + " " + mEpisode.getEpisode());
// Set the movie plot
if (!MizLib.isPortrait(getActivity())) {
mDescription.setBackgroundResource(R.drawable.selectable_background);
mDescription.setMaxLines(getActivity().getResources().getInteger(R.integer.episode_details_max_lines));
mDescription.setTag(true); // true = collapsed
mDescription.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (((Boolean) mDescription.getTag())) {
mDescription.setMaxLines(1000);
mDescription.setTag(false);
} else {
mDescription.setMaxLines(getActivity().getResources().getInteger(R.integer.episode_details_max_lines));
mDescription.setTag(true);
}
}
});
mDescription.setEllipsize(TextUtils.TruncateAt.END);
mDescription.setFocusable(true);
} else {
if (MizLib.isTablet(getActivity()))
mDescription.setLineSpacing(0, 1.15f);
}
mDescription.setText(mEpisode.getDescription());
if (mShowFileLocation) {
mFileSource.setText(mEpisode.getAllFilepaths());
} else {
mFileSource.setVisibility(View.GONE);
}
// Set the episode air date
mAirDate.setText(MizLib.getPrettyDatePrecise(getActivity(), mEpisode.getReleasedate()));
// Set the movie rating
if (!mEpisode.getRating().equals("0.0")) {
try {
int rating = (int) (Double.parseDouble(mEpisode.getRating()) * 10);
mRating.setText(Html.fromHtml(rating + "<small> %</small>"));
} catch (NumberFormatException e) {
mRating.setText(mEpisode.getRating());
}
} else {
mRating.setText(R.string.stringNA);
}
if (TextUtils.isEmpty(mEpisode.getDirector()) || mEpisode.getDirector().equals(getString(R.string.stringNA))) {
mDirector.setVisibility(View.GONE);
} else {
mDirector.setText(mEpisode.getDirector());
}
if (TextUtils.isEmpty(mEpisode.getWriter()) || mEpisode.getWriter().equals(getString(R.string.stringNA))) {
mWriter.setVisibility(View.GONE);
} else {
mWriter.setText(mEpisode.getWriter());
}
if (TextUtils.isEmpty(mEpisode.getGuestStars()) || mEpisode.getGuestStars().equals(getString(R.string.stringNA))) {
mGuestStars.setVisibility(View.GONE);
} else {
mGuestStars.setText(mEpisode.getGuestStars());
}
}
Rest of the code
}
Activity
public class TvShowEpisodeDetails extends MizActivity implements TvShowEpisodeDetailsFragment.TextClicked{
private static final String SHOW_ID = "showId";
private ArrayList<TvShowEpisode> mEpisodes = new ArrayList<TvShowEpisode>();
private int mSeason, mEpisode;
private String mShowId, mShowTitle;
private ViewPager mViewPager;
private DbAdapterTvShowEpisodes mDatabaseHelper;
private Bus mBus;
#Override
protected int getLayoutResource() {
return R.layout.viewpager_with_toolbar_overlay;
}
#Override
public void onCreate(Bundle savedInstanceState) {
mBus = MizuuApplication.getBus();
super.onCreate(savedInstanceState);
// Set theme
setTheme(R.style.Mizuu_Theme_NoBackground);
ViewUtils.setupWindowFlagsForStatusbarOverlay(getWindow(), true);
ViewUtils.setProperToolbarSize(this, mToolbar);
mShowId = getIntent().getExtras().getString(SHOW_ID);
mSeason = getIntent().getExtras().getInt("season");
mEpisode = getIntent().getExtras().getInt("episode");
mDatabaseHelper = MizuuApplication.getTvEpisodeDbAdapter();
Cursor cursor = mDatabaseHelper.getEpisodes(mShowId);
try {
while (cursor.moveToNext()) {
mEpisodes.add(new TvShowEpisode(this, mShowId,
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_TITLE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_PLOT)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_SEASON)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_AIRDATE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_DIRECTOR)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_WRITER)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_GUESTSTARS)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_RATING)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_HAS_WATCHED)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_FAVOURITE))
));
}
} catch (Exception e) {
} finally {
cursor.close();
}
final ArrayList<PlanetModel> episodeslist = new ArrayList<>();
for(TvShowEpisode e : mEpisodes){
episodeslist.add(new PlanetModel(e.mEpisode));
}
mShowTitle = MizuuApplication.getTvDbAdapter().getShowTitle(mShowId);
setTitle(mShowTitle);
mViewPager = (ViewPager) findViewById(R.id.awesomepager);
mViewPager.setAdapter(new TvShowEpisodeDetailsAdapter(getSupportFragmentManager()));
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
for (int i=0; i<episodeslist.size(); i++)
{
episodeslist.get(i).setPlanetSelected(false);
}
episodeslist.get(position).setPlanetSelected(true);
//notify your recycler views adaper
ViewUtils.updateToolbarBackground(TvShowEpisodeDetails.this, mToolbar, 0, mEpisodes.get(position).getTitle(), Color.TRANSPARENT);
}
});
if (savedInstanceState != null) {
mViewPager.setCurrentItem(savedInstanceState.getInt("tab", 0));
} else {
for (int i = 0; i < mEpisodes.size(); i++) {
if (mEpisodes.get(i).getSeason().equals(MizLib.addIndexZero(mSeason)) && mEpisodes.get(i).getEpisode().equals(MizLib.addIndexZero(mEpisode))) {
mViewPager.setCurrentItem(i);
SharedPreferences setPref = this.getSharedPreferences("TvShowEpisodeDetails", Context.MODE_PRIVATE);
setPref.edit().putInt("i", i).apply();
break;
}
}
}
}
#Subscribe
public void onScrollChanged(TvShowEpisodeDetailsFragment.BusToolbarColorObject object) {
ViewUtils.updateToolbarBackground(this, mToolbar, object.getAlpha(),
mEpisodes.get(mViewPager.getCurrentItem()).getTitle(), object.getToolbarColor());
}
public void onResume() {
super.onResume();
mBus.register(this);
ViewUtils.updateToolbarBackground(this, mToolbar, 0, mShowTitle, Color.TRANSPARENT);
}
#Override
public void onPause() {
super.onPause();
mBus.unregister(this);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
#Override
public void onStart() {
super.onStart();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
#Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("tab", mViewPager.getCurrentItem());
}
#Override
public void sendText(int position) {
mViewPager.setCurrentItem(position,false);
//Toast.makeText(getContext(), "Item Clicked " + text, Toast.LENGTH_SHORT).show();
}
private class TvShowEpisodeDetailsAdapter extends FragmentPagerAdapter {
public TvShowEpisodeDetailsAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int index) {
return TvShowEpisodeDetailsFragment.newInstance(mShowId, Integer.parseInt(mEpisodes.get(index).getSeason()), Integer.parseInt(mEpisodes.get(index).getEpisode()));
}
#Override
public int getCount() {
return mEpisodes.size();
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 0) {
if (resultCode == Activity.RESULT_OK) {
setResult(Activity.RESULT_OK);
finish();
}
}
}
}

Yes, a Viewpager can be setup in a Fragment.
You just need to get the right FragmentManager when constructing it i.e use getChildFragmentManager() in mViewPager.setAdapter(new TvShowEpisodeDetailsAdapter(getSupportFragmentManager()));
From https://developer.android.com/guide/fragments/fragmentmanager
Access the FragmentManager
Accessing in an activity
Every FragmentActivity and subclasses thereof, such as
AppCompatActivity, have access to the FragmentManager through the
getSupportFragmentManager() method.
Accessing in a Fragment
Fragments are also capable of hosting one or more child fragments.
Inside a fragment, you can get a reference to the FragmentManager that
manages the fragment's children through getChildFragmentManager().

What to set on textview from the JSON response I'm getiing through retrofit for DashboardResponse?

I'm getting nullPointerException when I try to set data to textviews from the JSON response,I'm getting through retrofit. I would like to set the total sale, total expense and total purchase values to the textviews:
tv_total_purchase_today,
tv_total_sale_today,
tv_total_expense_today
What should I put in the setsaleInformations method?
Here's my code:
API Response
public class DashboardResponse extends CommonResponse {
#Expose
#SerializedName("graph_data")
private ArrayList<Graph> graph_data;
#Expose
#SerializedName("total_sale")
private String total_sale;
#Expose
#SerializedName("total_purchase")
private String total_purchase;
#Expose
#SerializedName("total_expense")
private String total_expense;
public ArrayList<Graph> getGraph_data() {
return graph_data;
}
public void setGraph_data(ArrayList<Graph> graph_data) {
this.graph_data = graph_data;
}
public String getTotal_sale() {
return total_sale;
}
public void setTotal_sale(String total_sale) {
this.total_sale = total_sale;
}
public String getTotal_purchase() {
return total_purchase;
}
public void setTotal_purchase(String total_purchase) {
this.total_purchase = total_purchase;
}
public String getTotal_expense() {
return total_expense;
}
public void setTotal_expense(String total_expense) {
this.total_expense = total_expense;
}
}
API Interactor Implementation
#Override
public void getDashboard(final DashboardListener dashboardListener) {
Call<DashboardResponse> call = apiServiceInterface.getDashboard();
call.enqueue(new Callback<DashboardResponse>() {
#Override
public void onResponse(Call<DashboardResponse> call, Response<DashboardResponse> response) {
if(isResponseValid(response) && response.body().isSuccess()){
dashboardListener.onDashboardFetch(response.body());
}else{
dashboardListener.onFailed(prepareFailedMessage(response), APIConstants.DASHBOARD);
}
}
Dashboard Fragment
public class DashboardFragment extends Fragment {
private Context context;
private SalesUtils salesUtils;
private DashboardResponse dashboardResponse;
private HomePresenter homePresenter;
private HomeView homeView;
#BindView(R.id.tv_total_sale_today)
TextView tv_total_sale_today;
#BindView(R.id.tv_total_purchase_today)
TextView tv_total_purchase_today;
#BindView(R.id.tv_total_expense_today)
TextView tv_total_expense_today;
#BindView(R.id.cv_sale_today)
CardView cv_sale_today;
#BindView(R.id.cv_purchase_today)
CardView cv_purchase_today;
#BindView(R.id.cv_expense_today)
CardView cv_expense_today;
private ArrayList<Sale> salesToday;
private ArrayList<Product> productSoldToday;
private SimpleDateFormat simpleDateTimeFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss", Locale.getDefault());
public DashboardFragment() {
// Required empty public constructor
}
public static DashboardFragment newInstance(HomePresenter homePresenter) {
DashboardFragment fragment = new DashboardFragment();
fragment.initializeSaleInfo(homePresenter);
return fragment;
}
private void initializeSaleInfo(HomePresenter homePresenter) {
this.homePresenter = homePresenter;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
context = getActivity();
homeView = (HomeView) getActivity();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_dashboard, container, false);
ButterKnife.bind(this, rootView);
cv_sale_today.startAnimation(AnimationUtils.loadSlideInLeftAnimation(context));
cv_purchase_today.startAnimation(AnimationUtils.loadFadeInAnimation(context));
cv_expense_today.startAnimation(AnimationUtils.loadSlideInRightAnimation(context));
homePresenter.fetchDashboard();
setListeners();
return rootView;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
#Override
public void onResume() {
super.onResume();
if(homeView!=null) {
homeView.changeSearchState(false);
}
}
#Override
public void onPause() {
super.onPause();
if(homeView != null)
homeView.setIsInSaleInfo(false);
}
public void setSaleInformations() {
if (getActivity() != null && isAdded())
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
tv_total_purchase_today.setText();
tv_total_sale_today.setText();
tv_total_expense_today.setText();
}
});
}
private Thread resumeSaleInfo = new Thread(new Runnable() {
#Override
public void run() {
salesToday = salesUtils.getSalesDuring(ApplicationUtils.getStartingDateTime(simpleDateTimeFormat.format(System.currentTimeMillis())), ApplicationUtils.getEndingDateTime(simpleDateTimeFormat.format(System.currentTimeMillis())));
if (getActivity() != null && isAdded())
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
tv_total_purchase_today.setText(ApplicationUtils.getBengaliNumber(salesToday.size() + "") + " " + getString(R.string.buy_today_label));
tv_total_sale_today.setText(ApplicationUtils.currencyFormat(SalesUtils.getTotalSale(salesToday)));
tv_total_expense_today.setText(ApplicationUtils.getBengaliNumber(SalesUtils.countUnitSold(productSoldToday) + "") + " " + getString(R.string.unit_sold));
}
});
}
});
private void setListeners() {
cv_sale_today.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
homePresenter.showSaleAt(simpleDateTimeFormat.format(System.currentTimeMillis()));
}
});
cv_purchase_today.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
homePresenter.showSaleAt(simpleDateTimeFormat.format(System.currentTimeMillis()));
}
});
cv_expense_today.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
homePresenter.showUnitSold(simpleDateTimeFormat.format(System.currentTimeMillis()), simpleDateTimeFormat.format(System.currentTimeMillis()));
}
});
}
public void setDashboard(DashboardResponse dashboardResponse) {
Log.e("DASHBOARD", new Gson().toJson(dashboardResponse));
this.dashboardResponse = dashboardResponse;
setSaleInformations();
}
}

That means either the text views haven't loaded onto the screen yet or the views haven't been initialized yet.

setContentView sets display black

There will be a lot of code. I had to leave it for you to understand logic of an application.
Here is the MainActivity. Called on starting.
public class MainActivity extends AppCompatActivity {
private GameView gameView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//some unnecessary code
setContentView(R.layout.activity_main);
}
public void startSurvival(View view) {
gameView = new GameView(this, this, "survival");
setContentView(gameView);
}
public void chooseData(View view){
setContentView(new DView(this, this));
}
public void backToMenu(){
setContentView(R.layout.activity_main);
gameView = null;
}
#Override
protected void onResume() {
super.onResume();
try {
gameView.update();
} catch (NullPointerException e) {}
}
}
This Activity is a List of options. You choose one and then GameView sets as content View with appropriate parameters.
Here is no questions so I cut almost all the code.
public class DView extends ListView {
DView(final Context context, final MainActivity mainActivity){
super(context);
this.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String[] columns = {"data"};
String having = "id = " + ids[position];
SQLiteDatabase db = dbHelper.getWritableDatabase();
Cursor cursor = db.query("levels", columns, null, null, ID, having, null);
if (cursor.moveToFirst()){
int dataInd = cursor.getColumnIndex(DATA);
mainActivity.setContentView(new GameView(context, mainActivity, cursor.getString(dataInd)));
}//everything here works fine. This just shows that setContentView can be done multiple times
//without bugs
cursor.close();
dbHelper.close();
}
});
}
}
And here comes the problem. When win() method is called display turns black. Application does not crash.
public class GameView extends SurfaceView{
public MainActivity mainActivity;
GameThread gameThread;
public Player player = null;
public Canvas canvas;
public ExtraData data;
public GameView (Context context, MainActivity mainActivity, String data){
super(context);
this.mainActivity = mainActivity;
if (data.equals("survival")) {
this.data = new ExtraData("RandomSpawn47",null, this);
} else {
this.data = new ExtraData("UsingData", data, this);
}
update();
}
void update(){
gameThread = new GameThread(this);
getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
gameThread.running(true);
if (gameThread.getState() == Thread.State.NEW)
gameThread.start();
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
gameThread.running(false);
}
});
if (player == null)
player = new Player(this);
}
public class GameThread extends Thread{
private GameView gameView;
public GameThread(GameView gameView) {
this.gameView = gameView;
}
public void running(boolean run){
running = run;
}
#Override
public void run() {
while (running){
canvas = null;
try{
canvas = gameView.getHolder().lockCanvas(null);
synchronized (gameView.getHolder()){
draw(canvas);
this.wait(45);
}
} catch(Exception e) {}
finally {
if((canvas != null)&&(running)){
gameView.getHolder().unlockCanvasAndPost(canvas);
}
}
}
}
}
#Override
public void draw(Canvas canvas) {
super.draw(canvas);
canvas.drawColor(Color.BLUE);
data.onDraw();
}
public void win(){
mainActivity.backToMenu();//not switching the menu
}
}
Other classes like ExtraData and Player are not important.
GameThread and SurfaceView destroyes (I checked them with Logs in onDestroy() and in the end of run() method).

You are calling method of Activity from another class. Instead of mainActivity.backToMenu(), create one interface, implement it in MainActivity and pass the reference in GameView to initialize the interface. And where you are calling win method, call interface method instead of calling the public method of MainActivity.
Create one interface like:
public interface UpdateActivity{
void updateActivity();
}
In MainActivity
public class MainActivity extends AppCompatActivity implements UpdateActivity
then override the method of interface
void updateActivity(){
setContentView(R.layout.activity_main);
gameView = null;
}
Pass the reference in GameView instead of passing the MainActivity reference.
public GameView (Context context, UpdateActivity updateActivity , String data) {
super(context);
this.updateActivity = updateActivity ;
if (data.equals("survival")) {
this.data = new ExtraData("RandomSpawn47",null, this);
} else {
this.data = new ExtraData("UsingData", data, this);
}
update();
}
Now call the method where you want to call:
updateActivity.updateActivity();

mediaplayer starts a new instance when i return to the app

Im making a simple radio streaming app. Everything works great but having a few buggy issues.
When i press the home screen of my device i want the radio to carry on playing. which it does, But as soon as i go to my app history and re-open the app. It starts a new session. this make for a very Un-Pleasurble piece of music lol.
The app is very simple in the way it works i have a media player and a media controller which is attached to a surfaceView in my xml.
Can some one please tell me the correct way to fix this issue as this is the first time making an app that contains a live stream.
Thanks as always guys
my code for the media player and controller
public class radiostation extends AppCompatActivity implements SurfaceHolder.Callback, MediaPlayer.OnPreparedListener,
MediaController.MediaPlayerControl {
private SurfaceView surfaceView;
private SurfaceHolder surfaceHolder;
private MediaPlayer mediaPlayer;
private MediaController mediaController;
private Handler handler = new Handler();
String videoSource =
"my radio station source address";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_radiostation);
surfaceView = (SurfaceView)findViewById(R.id.surface);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceView.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
if(mediaController != null){
mediaController.show();
}
return false;
}
});
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
Toast.makeText(radiostation.this,
"Media Controls active lets mash it up", Toast.LENGTH_LONG).show();
mediaPlayer = new MediaPlayer();
mediaPlayer.setDisplay(surfaceHolder);
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setOnPreparedListener(this);
try {
mediaPlayer.setDataSource(videoSource);
mediaPlayer.prepare();
mediaController = new MediaController(this);
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(radiostation.this,
"Radio Station off Air or no internet connection!\n" + e.toString(),
Toast.LENGTH_LONG).show();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder,
int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
#Override
public void onPrepared(MediaPlayer mp) {
mediaPlayer.start();
Toast.makeText(radiostation.this,
"You are now connected ", Toast.LENGTH_LONG).show();
mediaController.setMediaPlayer(this);
mediaController.setAnchorView(surfaceView);
handler.post(new Runnable() {
public void run() {
mediaController.setEnabled(true);
mediaController.show();
}
});
}
#Override
public void start() {
mediaPlayer.start();
}
#Override
public void pause() {
mediaPlayer.pause();
}
#Override
public int getDuration() {
return mediaPlayer.getDuration();
}
#Override
public int getCurrentPosition() {
return mediaPlayer.getCurrentPosition();
}
#Override
public void seekTo(int pos) {
mediaPlayer.seekTo(pos);
}
#Override
public boolean isPlaying() {
return mediaPlayer.isPlaying();
}
#Override
public int getBufferPercentage() {
return 0;
}
#Override
public boolean canPause() {
return true;
}
#Override
public boolean canSeekBackward() {
return false;
}
#Override
public boolean canSeekForward() {
return false;
}
#Override
public int getAudioSessionId() {
return mediaPlayer.getAudioSessionId();
}
#Override
public void onBackPressed() {
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer=null;
finish();
}

Setting up MediaController

Im trying to set up the MediaController so I can have controls when playing back audio but when I try to declare it the "this" is coming up as an error. What am I doing wrong?
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
public class MainActivity extends AppCompatActivity implements MediaRecorder.OnInfoListener {
private boolean cont;
private MediaRecorder mediaRecorder;
private MediaPlayer mediaPlayer;
private String OUTPUT_FILE;
private MediaController mediaController;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
OUTPUT_FILE = Environment.getExternalStorageDirectory()+"/androidaudio1.3gpp";
cont=true;
}
public void buttonClicked(View view){
switch (view.getId()){
case R.id.startRec:
beginRecord();
break;
case R.id.stopRec:
stopRecord();
break;
case R.id.startPlay:
try {
begginPlaying();
} catch (IOException e) {
e.printStackTrace();
}
break;
case R.id.stopPlay:
stopPlaying();
break;
}
}
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void begginPlaying() throws IOException {
if (mediaPlayer != null)
mediaPlayer.release();
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(OUTPUT_FILE);
mediaController = new MediaController(this);
mediaController.setMediaPlayer(this);
mediaController.show();
mediaPlayer.prepare();
mediaPlayer.start();
}
private void stopPlaying(){
if (mediaPlayer!= null){
mediaPlayer.stop();
mediaPlayer.reset();
mediaPlayer.release();
mediaPlayer=null;
}
#Override
public void start() {
mediaPlayer.start();
}
#Override
public void pause() {
mediaPlayer.pause();
}
#Override
public int getDuration() {
return mediaPlayer.getDuration();
}
#Override
public int getCurrentPosition() {
return mediaPlayer.getCurrentPosition();
}
#Override
public void seekTo(int pos) {
mediaPlayer.seekTo(pos);
}
#Override
public boolean isPlaying() {
return mediaPlayer.isPlaying();
}
#Override
public int getBufferPercentage() {
return 0;
}
#Override
public boolean canPause() {
return true;
}
#Override
public boolean canSeekBackward() {
return true;
}
#Override
public boolean canSeekForward() {
return true;
}
#Override
public int getAudioSessionId() {
return 0;
}
}

MediaController requires the context to be passed to the constructor. Without anymore code or knowing where you declared the MediaController, my best guess is that you don't have access to the context in the place where you declared the MediaController. Either pass the context from the activity where you would like to use the MediaController, or put this code in that activity.
https://developer.android.com/reference/android/widget/MediaController.html
EDIT:
I tried your code, check your imports & ensure you have, import android.widget.MediaController & not import android.media.session.MediaController.

Try this
if you are using in Activity then you can pass this
if you are using in Fragment then use getActivity() or context
and to set MediaController
use this code
video.setOnPreparedListener(new OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.setOnVideoSizeChangedListener(new OnVideoSizeChangedListener() {
#Override
public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
/*
* add media controller
*/
mc = new MediaController(YourActivity.this);
video.setMediaController(mc);
/*
* and set its position on screen
*/
mc.setAnchorView(video);
}
});
}
});

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

I am make scanner barecode it black screen instead of camera - java

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setContentView sets display black

mediaplayer starts a new instance when i return to the app

Setting up MediaController

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