相关疑难解决方法(0)

main.xml中

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
>
    <Spinner
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:id="@+id/spin"
        android:entries="@array/num"
    />
    <Button
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:id="@+id/btn"
        android:text="Click ME"
        android:gravity="center"
    />
    <TextView  
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/txtv"
    />
</LinearLayout>

Spin.java

package com.and.spin;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.TextView;

public class spin extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        final TextView tv=(TextView)findViewById(R.id.txtv);

        Button b=(Button)findViewById(R.id.btn);
        final Spinner s=(Spinner)findViewById(R.id.spin);

        b.setOnClickListener(new OnClickListener() …