Android开发之Spinner的使用

1.带一个选择按钮的Spinner（ArrayAdapter）

package com.rex;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.Toast;public class SpinnerTest extends Activity{private Spinner spinner;private static final String[] Numbers = {"1号","2号","3号","4号","5号"};private ArrayAdapter<String> myAdapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.spinner);spinner = (Spinner)findViewById(R.id.spinner1);        myAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,Numbers);        myAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);        spinner.setAdapter(myAdapter);        spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){@Overridepublic void onItemSelected(AdapterView<?> arg0, View arg1,int arg2, long arg3) {Toast.makeText(getApplicationContext(), "你选择了："+Numbers[arg2], 0).show();arg0.setVisibility(View.VISIBLE);}@Overridepublic void onNothingSelected(AdapterView<?> arg0) {Toast.makeText(getApplicationContext(), "你什么也没选", 0).show();}               });}}

运行结果：

2.带图片的Spinner（BaseAdapter）

package com.rex;import android.app.Activity;import android.os.Bundle;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.Toast;public class SpinnerContainImage extends Activity{private Spinner spinner;private static final String[] Numbers = {"1号","2号","3号"};private MyAdapter myAdapter;int[] imageId={R.drawable.ic_path_node,R.drawable.ic_poi,R.drawable.ic_scene};;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.spinner);spinner = (Spinner)findViewById(R.id.spinner1);myAdapter= new MyAdapter();        spinner.setAdapter(myAdapter);        spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){@Overridepublic void onItemSelected(AdapterView<?> arg0, View arg1,int arg2, long arg3) {Toast.makeText(getApplicationContext(), "你选择了："+Numbers[arg2], 0).show();arg0.setVisibility(View.VISIBLE);}@Overridepublic void onNothingSelected(AdapterView<?> arg0) {Toast.makeText(getApplicationContext(), "你什么也没选", 0).show();}               });}class MyAdapter extends BaseAdapter{@Overridepublic int getCount() {return Numbers.length;}@Overridepublic Object getItem(int position) {return null;}@Overridepublic long getItemId(int position) {return 0;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {LinearLayout linearLayout = new LinearLayout(SpinnerContainImage.this);linearLayout.setOrientation(LinearLayout.HORIZONTAL);ImageView  imageView = new ImageView(SpinnerContainImage.this);imageView.setImageDrawable(getResources().getDrawable(imageId[position]));linearLayout.addView(imageView);TextView textView = new TextView(SpinnerContainImage.this);textView.setText(""+Numbers[position]);linearLayout.addView(textView);return linearLayout;}}}

运行结果：

3.点击会在选项的左边显示一个图片的Spinner（这个是在这里看到然后实践了一下 http://my.oschina.net/kut/blog/30564）

XML配置文件的代码：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"              android:layout_width="fill_parent"              android:layout_height="fill_parent"              android:padding="10dip">    <ImageView android:id="@+id/icon"               android:src="@drawable/ic_path_node"               android:layout_marginRight="10dip"               android:layout_width="wrap_content"               android:layout_height="wrap_content"               android:visibility="invisible"/>    <TextView android:id="@+id/label"              android:layout_width="wrap_content"              android:layout_height="wrap_content"              android:layout_toRightOf="@id/icon"              android:textColor="#000000"              android:textSize="22dip"/></LinearLayout>

Java的代码：

package com.rex;import android.app.Activity;import android.content.res.Resources;import android.graphics.Color;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.TextView;public class Spinner2 extends Activity{public Spinner spinner;    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.spinner);        Resources res = getResources();//        CharSequence[] platforms = res.getTextArray(R.array.Numbers);        String[] items = {"one","two","three","four"};        spinner = (Spinner) findViewById(R.id.spinner1);//        ArrayAdapter<CharSequence> adapter = new ArrayAdapter<CharSequence>//        (this, android.R.layout.simple_spinner_item, platforms){}        ArrayAdapter<String> adapter = new ArrayAdapter<String>(        this, android.R.layout.simple_spinner_item, items) {            @Override            public View getDropDownView(int position, View convertView, ViewGroup parent) {                View view = getLayoutInflater().inflate(R.layout.spinner2, parent, false);                TextView label = (TextView) view.findViewById(R.id.label);                label.setText(getItem(position));                if (spinner.getSelectedItemPosition() == position) {                    label.setTextColor(Color.YELLOW);                    view.setBackgroundColor(Color.WHITE);                    view.findViewById(R.id.icon).setVisibility(View.VISIBLE);                }                return view;            }        };        spinner.setAdapter(adapter);    }}

运行结果：

4.直接把Spinner中的数据写到String.XMl文件中

XML配置文件

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="fill_parent"android:layout_height="fill_parent"><Spinnerandroid:layout_height="wrap_content"android:id="@+id/spinner1"android:entries="@array/spinner"android:layout_width="match_parent"></Spinner></LinearLayout>

Java代码：

spinner = (Spinner)findViewById(R.id.spinner1);        spinner.setOnItemSelectedListener(new OnItemSelectedListener() {@Overridepublic void onItemSelected(AdapterView<?> parent, View view,int position, long id) {Toast.makeText(MainActivity.this, spinner.getSelectedItem().toString(), 0).show();}@Overridepublic void onNothingSelected(AdapterView<?> parent) {Toast.makeText(MainActivity.this, "你没有选择", 0).show();}});

运行结果：