安卓界面的下拉列表主要使用<Spinner>组件;其中的数组的创建主要分为静态创建和动态创建,下面主要写的静态数组的创建;部分代码如下所示“
xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/txt01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<Spinner
android:id="@+id/sp01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:entries="@array/city"
android:layout_toRightOf="@+id/txt01"
/>
<TextView
android:id="@+id/txt02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="你选择的是:"
android:layout_below="@+id/txt01"
android:layout_margin="50dp"
/>
</RelativeLayout>
资源文件代码:
<resources>
<string-array name="city">
<item >北京</item>
<item >上海</item>
<item >广州</item>
<item >深圳</item>
<item >成都</item>
<item >西安</item>
<item >香港</item>
</string-array>
</resources>
JAVA代码:
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Spinner;
import android.widget.TextView;
public class MainActivity extends Activity {
private TextView txt2;
private Spinner sp1;
private StringBuilder result=new StringBuilder();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txt2=(TextView)this.findViewById(R.id.txt02);
sp1=(Spinner)this.findViewById(R.id.sp01);
final String[] cities_list=getResources().getStringArray(R.array.city);
final String wy=txt2.getText().toString();
sp1.setOnItemSelectedListener(new OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
result.delete(0, result.length());
String ci=cities_list[arg2];
result.append(wy.toString()+ci.toString());
txt2.setText(result);
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
原文:http://www.cnblogs.com/wy-internet-cd/p/5423116.html