adapter Archives - Android Dvlpr

Learn how to style a Custom Spinner for Android App. Android Studio has a widget known as spinner, but however styling spinner widget is a complicated stuff! Spinner Widget requires two different custom layouts, one for the view to be displayed and another for the drop down list! In this example blog on Custom Spinner Android, we will guide you how to create a custom spinner in android studio which will have: custom android spinner Customized Background for Selected Item Custom Selected Item Text ColorAndroid spinner Dropdown text colorBackground for Dropdown ListSpinner Animation Android Spinner selected Item Background To begin first, lets start by making a custom background for our spinner, as shown in the image below. custom spinner background Create a new drawable xml file and name it as spinner_bg.xml. For custom animation we've added exitFadeDuration attribute to our xml tag. The tag has 2 states: state_pressed and state_selected, you can set a different color for drawable attribute here. Android Spinner Animation Now create another drawable for animation named spinner_sla.xml android spinner animation duration,propertyName and valueTo are different properties with which you can play to add some custom animation! Android Spinner selected item Text Color Now we'll create a different background for selected text item shown in the spinner! Here you can set custom Android spinner Dropdown text color and a custom background color! android spinner <TextView xmlns:android"http://schemas.android.com/apk/res/android" android:id"@android:id/text1" style"?attr/spinnerDropDownItemStyle" android:textColor"@color/colorAccent" android:singleLine"true" android:layout_width"match_parent" android:layout_height"?attr/dropdownListPreferredItemHeight" android:background"@drawable/abc_spinner_mtrl_am_alpha" android:backgroundTint"@color/colorAccent" android:ellipsize"marquee" /> Android Spinner Dropdown Text Color Now let's set a custom background for drop down menu items! Here also you can set a Android spinner Dropdown text color and background color! Android spinner dropdown Designing Custom Android Spinner Now that all different (4) drawable and layout files are ready, lets create our Spinner! (Please mind the Constraints!) custom android spinner <Spinner android:id"@+id/spinner" style"@style/Widget.AppCompat.Spinner" android:layout_width"300dp" android:layout_height"?attr/dropdownListPreferredItemHeight" android:layout_margin"10dp" android:layout_marginStart"8dp" android:layout_marginTop"8dp" android:layout_marginEnd"8dp" android:background"@drawable/spinner_bg" android:dropDownWidth"300dp" android:dropDownVerticalOffset"?attr/dropdownListPreferredItemHeight" android:paddingRight"14dp" android:popupBackground"@android:color/white" android:popupElevation"3dp" android:stateListAnimator"@drawable/spinner_sla" app:layout_constraintEnd_toEndOf"parent" app:layout_constraintStart_toStartOf"parent" app:layout_constraintTop_toTopOf"parent" /> Coding Spinner in Java (with Toast Msg!) TaDaa! Now lets code our spinner in our MainActivity.java (wherever you want to put Spinner!) and create a Toast message whenever any value is selected in Spinner! String data {"Java", "Python", "C++", "C#", "Angular", "Go"}; ArrayAdapter adapter new ArrayAdapter (this, R.layout.spinner_item_selected, data); adapter.setDropDownViewResource(R.layout.spinner_dropdown_item); Spinner spinner findViewById(R.id.spinner); spinner.setAdapter(adapter); spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView parent, View view, int position, long id) { Toast.makeText(MainActivity.this,parent.getItemAtPosition(position).toString(),Toast.LENGTH_LONG).show(); } @Override public void onNothingSelected(AdapterView parent) { } }); An array of Strings is first created and passed in ArrayAdapter. For Array adapter we've set the custom layout here (spinner_item_selected) and our custom drop down resource (spinner_dropdown_item) Once we've set an adapter for spinner, we have created 'setOnItemSelectedListener' which helped in getting the string value of selected item and passed its value in toast! Coding Spinner in Kotlin (with Toast Msg!) For our Kotlin fans, here is how you can code your android spinner in Kotlin in our MainActivity.java (wherever you want to put Spinner!) and create a Toast message whenever any value is selected in Spinner! val data arrayOf("Java", "Python", "C++", "C#", "Angular", "Go") val adapter ArrayAdapter(this, R.layout.spinner_item_selected, data) adapter.setDropDownViewResource(R.layout.spinner_dropdown_item) val spinner findViewById (R.id.spinner) spinner.adapter adapter spinner.onItemSelectedListener object : AdapterView.OnItemSelectedListener { override fun onItemSelected(parent: AdapterView , view: View, position: Int, id: Long) { Toast.makeText(this@MainActivity, parent.getItemAtPosition(position).toString(), Toast.LENGTH_LONG).show() } override fun onNothingSelected(parent: AdapterView ) { } } In case you faces any issue or have something we left to discuss, drop a comment below and we will reply asap. Thanks :) Source: StackOverFlow Love Styling your Android App? Read more about creating a custom button using 6 different styles in Android here!

adapter

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