Android HelloViews Spinner教程R.id和R.array无法解析

我遇到了Android Helloviews Spinner教程的问题. HelloSpinner.java中的错误表明“R.id无法解析”和“R.array无法解析”. AndroidManifest.xml中的错误指出“找不到与给定名称匹配的资源(在’label’处,值为’@ string / app_name’)”和“找不到与给定名称匹配的资源”(在’label’处值’@ string / app_name’)“.

这是我的完整代码：

HelloSpinner.java

package net.brianwolf.hellospinner;

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;
import android.widget.AdapterView.OnItemSelectedListener;

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

        //Spinner spinner = (Spinner) findViewById(R.id.spinner);
        android.widget.Spinner spinner = (android.widget.Spinner) findViewById(R.id.spinner);
        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);
        spinner.setAdapter(adapter);


        spinner.setonItemSelectedListener(new MyOnItemSelectedListener());
    }
    public class MyOnItemSelectedListener implements OnItemSelectedListener {

        public void onItemSelected(AdapterView<?> parent,
            View view, int pos, long id) {
          Toast.makeText(parent.getContext(), "The planet is " +
              parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
        }

        public void onnothingSelected(AdapterView parent) {
          // Do nothing.
        }
    }
}

RES /布局/ main.xml中

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:padding="10dip"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dip"
        android:text="@string/planet_prompt"
    />
    <Spinner 
        android:id="@+id/spinner"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:prompt="@string/planet_prompt"
    />
</LinearLayout>

RES / layoutvalues / strings.xml中

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="planet_prompt">Choose a planet</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>
</resources>

AndroidManifest.xml中

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="net.brianwolf.hellospinner"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".HelloSpinner"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>


</manifest> 

谢谢！

解决方法:

将它添加到strings.xml(或values.xml,无论它被调用)：

< string name =“app_name”>您应用的名称在此处< / string>