在Android中Spinner就是下拉式功能表,它相當於HTML中的<select>標籤。
Android中提供的Spinner Widget下拉式功能表已經非常好用了,樣式也適用,
不過我們還是可以通過定義xml的方式來改變下拉式功能表的樣式。
在layout目錄下建立一個xml檔案,名字隨便(我這裡叫myspinner.xml)。在這個檔案裡面可以定義下拉式功能表的樣式
我們這裡採用TextView來實現
<?xml version="1.0" encoding="utf-8"?>
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text1"
android:layout_width="wrap_content"
android:layout_height="24sp"
android:singleLine="true"
style="?android:attr/spinnerDropDownItemStyle" />
在Activity中我們可以這樣調用
private static final String[] countriesStr={"","","",""}
mySpinner = (Spinner) findViewById(R.id.mySpinner);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, countriesStr);
adapter.setDropDownViewResource(R.layout.myspinner_dropdown);
mySpinner.setAdapter(adapter);
利用自訂的xml我們就可以很靈活的來改變下拉式功能表的樣式。
另外andorid也提供了兩種基本的樣式
android.R.layout.simple_spinner_item:TextView的下拉式功能表
android.R.layout.simple_spinner_dropdown_item:右邊帶有radio的下拉式功能表
============
方法2:
自訂下拉式功能表 -------- Spinner
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
public class SpinnerDrop extends Activity {
/** Called when the activity is first created. */
private List cityList;
private Spinner sp;
private int pos;
//private Animation animation;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
cityList= new ArrayList();//初始化一個city的String arraylist
countryList.add("長沙");
countryList.add("北京");
countryList.add("邵陽");
pos=0;//標記選擇的位置
sp = (Spinner)findViewById(R.id.Spinner01);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,cityList);
sp.setAdapter(adapter);//通過setAdapter()來讀取ArrayAdapter裡的資料
sp.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){//////下拉式清單的選擇事件
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
pos = position;//////////////標記選擇的位置
TextView tv = (TextView)findViewById(R.id.xs);
tv.setText("selected:"+cityList.get(position).toString());//顯示選擇的內容
parent.setVisibility(View.VISIBLE);////設定下拉式清單的顯示狀態
}
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
}
});
Button add = (Button)findViewById(R.id.add);//添加一個下拉項
add.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {
// TODO Auto-generated method stub
EditText et = (EditText)findViewById(R.id.EditText01);
String newstr = et.getText().toString();
cityList.add(newstr);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(SpinnerDrop.this,android.R.layout.simple_spinner_item,cityList);
sp.setAdapter(adapter);//添加資料後重新設定ArrayAdapter並載入進去
et.setText("");
Toast.makeText(SpinnerDrop.this, "添加成功", Toast.LENGTH_LONG).show();//浮框提示添加成功
}
});
Button del = (Button)findViewById(R.id.del);//刪除下拉項
del.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {
cityList.remove(pos);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(SpinnerDrop.this,android.R.layout.simple_spinner_item,cityList);
sp.setAdapter(adapter);
Toast.makeText(SpinnerDrop.this, "刪除成功", Toast.LENGTH_LONG).show();
}
});
}
}
http://psir.blog.sohu.com/142752165.html