[Android] Spinner in Android
spinner allows us to have 1 available picker like this:
To be able to set the values for spinner I have 2 how to perform the preset value in the file res / values / strings.xml or placed directly in your * .java.
First we do 1 the simple interface.
file *.xml
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | < LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android" android:layout_width = "match_parent" android:layout_height = "match_parent" android:orientation = "vertical" > < LinearLayout android:layout_width = "match_parent" android:layout_height = "wrap_content" > < TextView android:layout_width = "match_parent" android:layout_height = "wrap_content" android:gravity = "center_horizontal" android:text = "My Spinner 1" /> </ LinearLayout > < LinearLayout android:layout_width = "match_parent" android:layout_height = "wrap_content" > < Spinner android:id = "@+id/spin" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:gravity = "center_horizontal" /> </ LinearLayout > </ LinearLayout > |
Then we can look in the Graphics tab cal following form (bad breath but after run will look like the image above)
Next we install the value in the spinner:
How to 1: Install Now in Java.
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | package android.spinner; import android.os.Bundle; import android.app.Activity; import android.widget.ArrayAdapter; import android.widget.Spinner; public class MainActivity extends Activity { Spinner sp; ArrayAdapter<String> adapter; //tạo vector adapter để truyền vào spinner String numbers[] = { "ONE" , "TWO" , "THREE" , "FOUR" , "FIVE" , "SIX" , "SEVEN" , "EIGHT" , "NINE" , "TEN" }; // number[] là các giá trị của spinner khi hiện ra public void onCreate(Bundle savedInstanceState){ super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); sp = (Spinner) findViewById(R.id.spin); //set các giá trị của number vào adapter adapter = new ArrayAdapter<String>( this , android.R.layout.simple_spinner_item, numbers); //set adapter vào sp (spinner) sp.setAdapter(adapter); } } |
The results of our:
How to 2: Install the values from the file res / values / strings.xml
As well as interface installed on. We add the following code strings.xml file:
1 2 3 4 5 6 7 8 9 | < string-array name = "day" > <!--Tên của mảng--> < item >Monday</ item > < item >Tuesday</ item > < item >Wednesday</ item > < item >Thursday</ item > < item >Firday</ item > < item >Saturday</ item > < item >Sunday</ item > </ string-array > |
Next, we work with the * .java
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 | package android.spinner1; import android.os.Bundle; import android.app.Activity; import android.widget.ArrayAdapter; import android.widget.Spinner; public class MainActivity extends Activity { ArrayAdapter<CharSequence> adapter; Spinner sp; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); sp = (Spinner) findViewById(R.id.spin); //Lấy giá trị của mảng "day" trong file string.xml bằng lệnh sau ("R.array.day" là tên mảng giá trị trong file string) adapter = ArrayAdapter.createFromResource( this , R.array.day, android.R.layout.simple_spinner_item); //set các giá trị vào spinner sp.setAdapter(adapter); } } |
And our results:
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