Android中,給Spinner組件裝填數據比較常見的有以下兩種方法:
首先,在佈局文件main.xml中添加spinner組件,代碼如下:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Spinner_1"
/>
<Spinner
android:id="@+id/spinner_1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
然後,在MainActivity.java中,自定義方法add_list()進行Spinner的數據裝載,代碼如下:
public class MainActivity extends Activity {
private static final String[] mCountries = { "中國", "美國", "日本",
"俄羅斯", "加拿大" };
Spinner sp = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
add_list();
}
private void add_list() {
sp = (Spinner) findViewById(R.id.spinner_1);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, mCountries);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sp.setAdapter(adapter);
}
}
二、在XML中預定義列表數據
首先,在strings.xml中定義列表數據,代碼如下:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, MainActivity!</string>
<string name="app_name">SpinnerTest</string>
<string-array name="countries">
<item>中國</item>
<item>美國</item>
<item>日本</item>
<item>俄羅斯</item>
<item>加拿大</item>
</string-array>
</resources>
其次,在佈局文件main.xml中添加spinner組件,代碼如下:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Spinner_1"
/>
<Spinner
android:id="@+id/spinner_1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
最後,在MainActivity.java中,進行Spinner的數據裝載,代碼如下:
public class MainActivity extends Activity {
Spinner sp = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
sp = (Spinner) findViewById(R.id.spinner_1);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
this, R.array.countries,
android.R.layout.simple_spinner_dropdown_item);
sp.setAdapter(adapter);
}
}
也可以直接在xml中將數組設置進去,代碼如下:
<Spinner
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:spinnerMode="dropdown"
android:entries="@array/countries" />