Android

There is no predefined SeekBarPreference in Android. But we can make our own SeekBarPreference very simply. Here is simple example of making and using SeekBarPreference in Android. SeekBarPreference.java public class SeekBarPreference extends Preference implements SeekBar.OnSeekBarChangeListener { private TextView textValue; public SeekBarPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); } public SeekBarPreference(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } public SeekBarPreference(Context context, AttributeSet attrs) { super(context, attrs); } public SeekBarPreference(Context context) { super(context); } @Override protected View onCreateView(ViewGroup parent) { super.onCreateView(parent); View view = LayoutInflater.from(getContext()).inflate(R.layou...

JobScheduler is the Android framework API for scheduling tasks or work. It first became available in Android 5.0 (API level 21), and remains under active development. Notably, Android 7.0 (API level 24) added the ability to trigger jobs based on ContentProvider changes. If your app targets Android 5.0 (API level 21), we recommend that you use the JobScheduler to execute background tasks. Here is the simple example of Scheduling and Cancelling the scheduled job. MainActivity.java public class MainActivity extends AppCompatActivity { int count; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = findViewById(R.id.toolbar); setSupportActionBar(toolbar); } public void addJob(View view) { count++; JobScheduler scheduler = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE); ComponentName comp...

Though Kotlin has lot of massive features to speedup the development time, here is the simple example of using ViewPager in Android. In Kotlin we don't need to declare and initialize Views. We can simply access the id of Views from xml. Ex: activity_main.xml &lt?xml version="1.0" encoding="utf-8"?&gt &ltandroid.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.guna.kotlinapplication.MainActivity"&gt &ltandroid.support.design.widget.AppBarLayout android:id="@+id/appBarLayout" android:layout_width="match_parent" android:layout_height="wrap_content" android:the...