找不到Id（资源问题）

好吧，我正在开发一个项目，我试图在活动中使用带有文本的按钮，但是eclipse无法找到id或chooser.xml找不到Id（资源问题）

这里的myActivity类

package com.xxxxxxx; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.widget.Button; 
import android.widget.ImageButton; 
import android.view.*; 

public class MyActivity extends Activity {` 

    private Button mButton1; 
    private Button mButton2; 
    private Button mButton3; 
    private Button mButton4; 


     protected void onCreate(Bundle savedInstanceState){ 
     super.onCreate(savedInstanceState); 
       //chooser is underlined (chooser cannot be resolved or is not a field) 
     setContentView(R.layout.chooser); 
       //all ids are underlined(id cannot be resolved or is not a field) 
     mButton1 = (Button) findViewById(R.id.button1); 
     mButton2 = (Button) findViewById(R.id.button2); 
     mButton3 = (Button) findViewById(R.id.button3); 
     mButton4 = (Button) findViewById(R.id.button4); 

     mButton1.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent myIntent = new Intent(MyActivity.this, Activity2.class); 
       startActivity(myIntent); 
      } 
     }); 
     mButton2.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent myIntent = new Intent(MyActivity.this, Activty3.class); 
       startActivity(myIntent); 
      } 
     }); 

     mButton3.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent myIntent = new Intent(MyActivity.this, Activity4.class); 
       startActivity(myIntent); 
      } 
     }); 
     mButton4.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent myIntent = new Intent(MyActivity.this, Activity5.class); 
       startActivity(myIntent); 
      } 
     }); 
      } 

    }

这里的chooser.xml文件

 <?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"> 

<Button 
    android:id="@+id/button_1" 
    android:layout_height="wrap_content" 
    android:layout_width="wrap_content" 
    android:text="@string/button_1" /> 

    <Button 
    android:text="@string/button_2" 
    android:id="@+id/button_2" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"/> 

    <Button 
    android:id="@+id/button_3" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="@string/button_3" 
    /> 

    <Button 
    android:id="@+id/button_4" 
    android:layout_height="wrap_content" 
    android:layout_width="wrap_content" 
    android:text="@string/button_4" 
    /> 

</LinearLayout>

而这里的字符串资源XML

<?xml version="1.0" encoding="utf-8"?> 
<resources> 
    <string name="app_name">Test App</string> 
    <string name="test_image">test.png</string> 
    <string name="button_1">button_1</string> 
    <string name="button_2">button_2</string> 
    <string name="button_3">button_3</string> 
    <string name="button_4">button_4</string> 
</resources>

来源

2011-04-19 the-ben-waters