本文实例讲述了Android控件之Spinner用法。分享给大家供大家参考。具体如下：
以下模拟下拉列表的用法
布局文件：
<"1.0" encoding="utf-8"?> <LinearLayout android:id="@+id/LinearLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android"> <TextView android:text="@string/ys" android:id="@+id/TextView01" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="28dip" /> <Spinner android:id="@+id/Spinner01" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout>
SpinnerActivity类：
package com.ljq.sp; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.Spinner; import android.widget.TextView; import android.widget.AdapterView.OnItemSelectedListener; public class SpinnerActivity extends Activity { private Spinner sp = null;//下拉列表 private TextView tv = null; // 所有资源图片的数组 private int[] drawableIds={R.drawable.football,R.drawable.basketball,R.drawable.volleyball}; // 所有字符串的数组 private int[] msgIds={R.string.zq,R.string.lq,R.string.pq}; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tv = (TextView) findViewById(R.id.TextView01); sp=(Spinner)this.findViewById(R.id.Spinner01);//初始化Spinner sp.setAdapter(adapter); sp.setOnItemSelectedListener(new OnItemSelectedListener() { public void onItemSelected(AdapterView<?> parent, View view, int positon, long id) { LinearLayout ll = (LinearLayout) view; View v=ll.getChildAt(0);//获取第一个控件ImageView Log.i("ljq", v.getClass().getName()); TextView tvn = (TextView) ll.getChildAt(1);//获取第二个控件TextView StringBuilder sb = new StringBuilder(); sb.append(getResources().getText(R.string.ys)).append(":").append(tvn.getText()); tv.setText(sb.toString()); } public void onNothingSelected(AdapterView<?> parent) { } }); } private BaseAdapter adapter = new BaseAdapter(){ public int getCount() { return drawableIds.length; } public Object getItem(int position) { return drawableIds[position]; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { LinearLayout ll = new LinearLayout(SpinnerActivity.this); ll.setOrientation(LinearLayout.HORIZONTAL); ImageView iv = new ImageView(SpinnerActivity.this); iv.setImageResource(drawableIds[position]); ll.addView(iv); TextView tv=new TextView(SpinnerActivity.this); tv.setText(msgIds[position]);//设置内容 tv.setTextSize(24); tv.setTextColor(R.color.black); ll.addView(tv); return ll; } }; }
运行结果
希望本文所述对大家的Android序设计有所帮助。
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