Android中Spanner获取选中内容和选中位置,根据位置选择对象

作为一名菜鸟,关于spanner获取选中的内容文字代码,网上后很多

但是根据给出的位置来自动选择对象,这个代码一直没找到

后来找人问了问,才知道就一句话的事,特意在这里记录下

array.xml

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<?xml version="1.0" encoding="utf-8"?>
<resources>
    
<string-array name="elementsArray">
        
<item></item>
        
<item></item>
        
<item></item>
        
<item></item>
        
<item></item>
    
</string-array>

</resources>

 

activity_main.xml

 

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<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
="com.example.spannerposition.MainActivity" >
    
    
<LinearLayout 
        android:layout_width
="match_parent"
        android:layout_height
="match_parent"
        android:orientation
="vertical">
        
        
<TextView 
            android:id
="@+id/tv_elements"
            android:layout_width
="wrap_content"
            android:layout_height
="wrap_content"
            android:text
="请选择你喜欢的五行:"
            android:textSize
="17sp"/>

    
<Spinner
        android:id
="@+id/s_elements"
        android:layout_width
="wrap_content"
        android:layout_height
="wrap_content"
        android:layout_gravity
="center"
        android:entries
="@array/elementsArray"
        android:textColor
="#000000"
        android:textCursorDrawable
="@null"
        android:textSize
="17sp" />
    
    
<Button 
        android:id
="@+id/bn_s_select3"
        android:layout_width
="wrap_content"
        android:layout_height
="wrap_content"
        android:layout_gravity
="center"
        android:text
="选中第三个"
        android:textSize
="17sp"/>
    
</LinearLayout>

</RelativeLayout>

 

MainActivity.java

 Java Code 
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package com.example.spannerposition;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Toast;

public class MainActivity extends Activity {
    
private Spinner s_elements;
    
private int s_position;//记录选择的位置
    private String element;
    
private Button bn_select3;

    @Override
    
protected void onCreate(Bundle savedInstanceState) {
        
super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
this.s_elements = (Spinner) super.findViewById(R.id.s_elements);
        
this.s_elements.setOnItemSelectedListener(new OnItemSelectedListenerImpl());
        
this.bn_select3 = (Button) super.findViewById(R.id.bn_s_select3);
        
      
//button监听
        bn_select3.setOnClickListener(new OnClickListener() {
            @Override
            
public void onClick(View v) {
                s_position = 
2;
                s_elements.setSelection(s_position, true);
//设置为选中s_posiiton位置的元素
            }
            
        });
    }
 
// 下拉框选择事件
    private class OnItemSelectedListenerImpl implements OnItemSelectedListener {
        @Override
        
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            element = parent.getItemAtPosition(position).toString();
// 得到spanner的值
            s_position = position;
            Toast.makeText(MainActivity.
this"选择的元素是:" +
            element,Toast.LENGTH_SHORT).show();
        }
        @Override
        
public void onNothingSelected(AdapterView<?> parent) {
            
// TODO Auto-generated method stub
        }
    }
}

 

posted @ 2015-06-10 09:02  菊草叶与圆企鹅  阅读(1072)  评论(0编辑  收藏  举报