android

[Solved] Nullpointer on sql query with android [duplicate]

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The first code snippet you have provided is not sufficient to answer the question with any degree of certainty. From the exception it would appear that the sqlHandler variable is null, but you have not provided any code to show how you are instantiating this. sqlHandler seems to be a global variable, so you’ll want … Read more

[Solved] Recycler view like instagram

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In your adapter class private static final int POSTER = 1; //for sliding item private static final int CHILDGROUP = 2; //normal items In getItemViewType() @Override public int getItemViewType(int position) { if (position == 0 ) return POSTER; else return CHILDGROUP; } In onCreateViewHolder() check which item & inflate layout as per item @Override public … Read more

[Solved] android-how to make a login?

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On orientation change, all life cycle functions of the Activity are called, because it is reconstructed from zero. Your application must take this into account. The current activity goes onPause() onStop() onDestroy(), then the new Activity goes onCreate() onStart() onResume(), in that order. Therefore you must store the fact that you have logged in, in … Read more

[Solved] Android SQLite data display to ListView

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The Cursor must include a column named “_id” or this class (CursorAdapter and descendants) will not work. COL_ID should be “_id” or you can try to use a workaround by making alias: String[] allColumns = new String[] { SqlDbHelper.COL_ID + ” AS ” + BaseColumns._ID, … See CursorAdapter 11 solved Android SQLite data display to … Read more

[Solved] What is this called in Android?

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That screens calls intro screens. that using viewpager if you want to first time when application is installed. The you have manage boolean flag when application is installed using sharedpreferences. check at the splash screen every time. solved What is this called in Android?

[Solved] Algorithm for quantity selection [closed]

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You should have a Product class. Each product object has different quantity measures and increment methods. Something like this: public abstract class Product { String quantityMeasure; //You can encapsulate this with a getter public abstract int step (int value); //here you want to increment “value” with different algorithms. } Now you can create different product … Read more

[Solved] Calculating speed on an android phone [closed]

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This is the example For calculating Speed of your android phone using GPS… LocationManager mlocManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); LocationListener mlocListener = new MyLocationListener(); mlocManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, mlocListener); public class MyLocationListener implements LocationListener { @Override public void onLocationChanged(Location loc) { loc.getLatitude(); loc.getLongitude(); Geocoder gcd = new Geocoder(getApplicationContext(), Locale.getDefault()); try { mAddresses = gcd.getFromLocation(loc.getLatitude(), loc.getLongitude(), 1); } … Read more

[Solved] Please identify this output format [closed]

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Looks like that is just the string description for the object, which is a result of you using result.toString(); This might be of some help for learning how to parse the result correctly. For example, you can get the first property of the object like so: SoapObject result = (SoapObject) envelope.getResponse(); String firstProperty = result.getProperty(0).toString(); … Read more

[Solved] can not resolve method ‘setText(java.lang.String)’

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Since you haven’t provided us with full code I cannot determine the correct answer but here are couple of possibilities. Set your command to the following textview.setText(“sometext”) You have to use “” when you are going to declare strings. Dolars is not a textview Is TextODolars a variable? If so, what kind? Maybe you have … Read more