android之Spinner控件用法

2022-11-18 19:28:01

用法1：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/container"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    tools:context="com.example.mars_2100_spinner.MainActivity"

    tools:ignore="MergeRootFrame" >

<Spinner android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:id="@+id/SpinnerId"/>

</LinearLayout>

package com.example.mars_2100_spinner;

import android.support.v7.app.ActionBarActivity;

import android.support.v7.app.ActionBar;

import android.support.v4.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

import android.widget.Toast;

import android.os.Build;

public class MainActivity extends ActionBarActivity {

    private static final String[] m_arr = {"第一组","第二组","第三组"};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Spinner _spin = (Spinner)findViewById(R.id.SpinnerId);

        ArrayAdapter<String> ada = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, m_arr);

        ada.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        _spin.setAdapter(ada);

        _spin.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){

            public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3){

                dispToast("选择的是"+m_arr[arg2]);

                arg0.setVisibility(View.VISIBLE);

            }

            public void onNothingSelected(AdapterView<?> arg0){

                //

            }

        });

        /*if (savedInstanceState == null) {

            getSupportFragmentManager().beginTransaction()

                    .add(R.id.container, new PlaceholderFragment()).commit();

        }*/

    }

    public void dispToast(String str){

        Toast.makeText(this, str, Toast.LENGTH_SHORT).show();

    }

    @Override

    public 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;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // Handle action bar item clicks here. The action bar will

        // automatically handle clicks on the Home/Up button, so long

        // as you specify a parent activity in AndroidManifest.xml.

        int id = item.getItemId();

        if (id == R.id.action_settings) {

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

    /**

     * A placeholder fragment containing a simple view.

     */

    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {

        }

        @Override

        public View onCreateView(LayoutInflater inflater, ViewGroup container,

                Bundle savedInstanceState) {

            View rootView = inflater.inflate(R.layout.fragment_main, container,

                    false);

            return rootView;

        }

    }

}

用法2：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/container"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    tools:context="com.example.mars_2100_spinner.MainActivity"

    tools:ignore="MergeRootFrame" >

<Spinner android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:id="@+id/SpinnerId2"/>

<TextView android:id="@+id/textView1"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"/>

<Spinner android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:id="@+id/SpinnerId3"/>

<TextView android:id="@+id/textView2"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"/>

</LinearLayout>

package com.example.mars_2100_spinner;

import android.support.v7.app.ActionBarActivity;

import android.support.v7.app.ActionBar;

import android.support.v4.app.Fragment;

import android.app.Activity;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

import android.widget.TextView;

import android.os.Build;

public class Main02Activity extends Activity {

    static final String[] CONSTELLATIONS = new String[] { "白羊座", "金牛座", "双子座",

            "巨蟹座", "狮子座", "处女座", "天枰座", "天蝎座", "射手座", "魔蝎座", "水瓶座", "双鱼座" };

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main02);

        final TextView txt2 = (TextView) findViewById(R.id.textView1);

        Spinner s1 = (Spinner) findViewById(R.id.SpinnerId2);

        final ArrayAdapter<CharSequence> adapter = ArrayAdapter

                .createFromResource(this, R.array.planets_array,

                        android.R.layout.simple_spinner_item);

        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        s1.setAdapter(adapter);

        s1.setPrompt("测试");

        s1.setOnItemSelectedListener(new OnItemSelectedListener() {

            @Override

            public void onItemSelected(AdapterView<?> parent, View view,

                    int position, long id) {

                txt2.setText(adapter.getItem(position).toString());

            }

            @Override

            public void onNothingSelected(AdapterView<?> parent) {

                txt2.setText("没选中的");

            }

        });

        final TextView txt4 = (TextView) findViewById(R.id.textView2);

        Spinner s2 = (Spinner) findViewById(R.id.SpinnerId3);

        ArrayAdapter<CharSequence> adapterC = new ArrayAdapter<CharSequence>(

                this, android.R.layout.simple_spinner_item, CONSTELLATIONS);

        adapterC.setDropDownViewResource(android.R.layout.simple_spinner_item);

        s2.setAdapter(adapterC);

        s2.setOnItemSelectedListener(new OnItemSelectedListener() {

            public void onItemSelected(AdapterView<?> parent, View view,

                    int position, long id) {

                txt4.setText(CONSTELLATIONS[position]);

            }

            public void onNothingSelected(AdapterView<?> parent) {

                txt4.setText("没选中的");

            }

        });

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main02, menu);

        return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // Handle action bar item clicks here. The action bar will

        // automatically handle clicks on the Home/Up button, so long

        // as you specify a parent activity in AndroidManifest.xml.

        int id = item.getItemId();

        if (id == R.id.action_settings) {

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

    /**

     * A placeholder fragment containing a simple view.

     */

    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {

        }

        @Override

        public View onCreateView(LayoutInflater inflater, ViewGroup container,

                Bundle savedInstanceState) {

            View rootView = inflater.inflate(R.layout.fragment_main02,

                    container, false);

            return rootView;

        }

    }

}

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="app_name">Mars_2100_Spinner</string>

    <string name="hello_world">Hello world!</string>

    <string name="action_settings">Settings</string>

    <string-array name="planets_array">

        <item>Mercury</item>

        <item>Venus</item>

        <item>Earth</item>

        <item>Mars</item>

        <item>Jupiter</item>

        <item>Saturn</item>

        <item>Uranus</item>

        <item>Neptune</item>

    </string-array>

    <string name="title_activity_main02">Main02Activity</string>

</resources>

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