安卓spinner的使用

 1,xml:

<Spinner
            android:id="@+id/spinner"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toBottomOf="@+id/buttonGetData"
            app:layout_constraintEnd_toStartOf="@+id/buttonGetData"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="@+id/buttonGetData" />

2,java代碼:

點擊彈出提示 

private void changeSpinner() {
        spinnerArr.add("yangliwei");
        spinnerArr.add("heheda");
        arrayAdapter = new ArrayAdapter(getContext(), android.R.layout.simple_dropdown_item_1line, spinnerArr);
        spinner.setAdapter(arrayAdapter);
        spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                showToast.showTextToast(getContext(),String.valueOf(spinnerArr.get(position)));
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
            }
        });
    }