androidSpinner使用及根据选择项跳转到相应的Activity

来源：互联网发布：js 掷骰子动画编辑：程序博客网时间：2024/04/29 08:57

1、Spinner使用

给Spinner设置数据的方式有两种，一种直接使用字符串数组，另外一种是使用xml文件

这里只介绍使用xml文件的形式：

首先先在..res\values目录下新建string-array

<?xml version="1.0" encoding="utf-8"?><resources>    <string-array name="choose">       <item>iphone5</item>       <item>V880</item>       <item>Lumia920</item>    </string-array></resources>

然后使用适配器：

ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.choose, android.R.layout.simple_spinner_item);adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);sp_choose.setAdapter(adapter);

有时候需要根据Spinner选择的项实现Activity跳转或者获取选择的内容，实现的方式很简单，Spinner提供了setOnItemSelectedListener监听器，下面是使用的示例：

package com.example.homework_3;import android.os.Bundle;import android.app.Activity;import android.content.Intent;import android.view.Menu;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.Spinner;import android.widget.TextView;import android.widget.AdapterView.OnItemSelectedListener;public class MainActivity extends Activity {private TextView tv_choose;private Spinner sp_choose;private Button bt_ok;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);tv_choose = (TextView) findViewById(R.id.tv_choose);bt_ok = (Button) findViewById(R.id.bt_ok);sp_choose = (Spinner) findViewById(R.id.sp_list);// 下拉框，xml文件数据ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.choose, android.R.layout.simple_spinner_item);adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);sp_choose.setAdapter(adapter);// 实现setOnItemSelectedListener获取选择的下拉菜单的值sp_choose.setOnItemSelectedListener(new OnItemSelectedListener() {@Overridepublic void onItemSelected(AdapterView<?> arg0, View arg1,int arg2, long arg3) {// TODO Auto-generated method stubString chose = MainActivity.this.getResources().getStringArray(R.array.choose)[arg2];tv_choose.setText("您选择的手机是：" + chose);}@Overridepublic void onNothingSelected(AdapterView<?> arg0) {// TODO Auto-generated method stub}});bt_ok.setOnClickListener(new Button.OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stub// 根据选择的手机型号跳转到相应的ActivityIntent intent = new Intent();switch (sp_choose.getSelectedItemPosition()) {case 0:intent.setClass(MainActivity.this, Iphone5Activity.class);startActivity(intent);break;case 1:intent.setClass(MainActivity.this, V880Activity.class);startActivity(intent);break;case 2:intent.setClass(MainActivity.this, Lumia920Activity.class);startActivity(intent);break;}}});}@Overridepublic 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;}}