Question 128681 in Android Studio Question posted in
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Android Studio – How to get multiple Spinner value?

I have a Fragment with 12 Spinners and I don’t need to perform any action until the user click on a button.

All my Spinners looks like this.(Showing only 2)

 <Spinner
    android:id="@+id/spinnerP1Type"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    style="@style/spinner_style"
    android:entries="@array/powerTypes"
    android:gravity="top"
    />
 <Spinner
    android:id="@+id/spinnerP2Type"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    style="@style/spinner_style"
    android:entries="@array/powerTypes"
    android:gravity="top"
    />

All of them have pretty similar name, and there’s no other spinners.
Is possible to process them in a loop instead of creating one new object by each one?

Spinner SpinP1 = getView().findViewById(R.id.spinnerP1Type);
Spinner SpinP2 = getView().findViewById(R.id.spinnerP2Type);
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2

Answers


  1. 0

    Wrap all the spinners in a ViewGroup (use either LinearLayout or ConstraintLayout) and then when the button is clicked, run a for loop and call getChildAt(loopIndex) on that ViewGroup. The ViewGroup should already have been instantiated with findViewById(R.id.the_container_name)

    The code below

    <LinearLayout
     android:id="@+id/spinner_container"
     android:orientation="vertical"
     `...` >

    <Spinner
        android:id="@+id/spinnerP1Type"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        style="@style/spinner_style"
        android:entries="@array/powerTypes"
        android:gravity="top"
        />
     <Spinner
        android:id="@+id/spinnerP2Type"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        style="@style/spinner_style"
        android:entries="@array/powerTypes"
        android:gravity="top"
        />

</LinearLayout>

    Then call:

                Linearlayout container = getView().findViewById(R.id.spinner_container);
            
            for (int i = 0; i < container.getChildCount(); i++) {
              View child = container.getChildAt(i);
              if (child instanceof Spinner) {
              Spinner spinner = (Spinner) child;
              spinner.setOnItemSelectedListener(new SimpleOnItemSelectedListener());

               }
         }
        
        
    /**
     * Listener
     */
    public class SimpleOnItemSelectedListener implements AdapterView.OnItemSelectedListener {
    
       @Override
       public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
    
       }
    
       @Override
       public void onNothingSelected(AdapterView<?> adapterView) {
    
       }
    }

    Note: SimpleOnItemSelectedListener implements AdapterView.OnItemSelectedListener

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  2. 0

    One possibility is to create an array of ids to loop over:

    int[] spinnerIds = new int[] {R.id.spinnerP2Type, R.id.spinnerP1Type);

for (int spinnerId : spinnerIds) {
    Spinner spinner = getView().findViewById(spinnerId);
    // etc.
}
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