示範
XML
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<TextView
android:id="@+id/t1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:text="選擇天氣"
app:layout_constraintBottom_toTopOf="@+id/sp1"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent" />
<Spinner
android:id="@+id/sp1"
android:layout_width="368dp"
android:layout_height="26dp"
android:entries="@array/season"
android:spinnerMode="dialog"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
JAVA
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
TextView t1;
Spinner sp1;
String[] sp1s={"春","夏","秋","冬"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
t1=(TextView)findViewById(R.id.t1);
sp1=(Spinner)findViewById(R.id.sp1);
sp1.setOnItemSelectedListener(this);
}
public void onItemSelected(AdapterView<?> parent, View view,int position,long id){
t1.setText(String.valueOf(sp1s[position]));
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
}
展示
相關文章:
