致命异常：主要误差

这里是日志消息致命异常：主要误差

03-07 22:54:51.555: E/AndroidRuntime(18687): FATAL EXCEPTION: main 
03-07 22:54:51.555: E/AndroidRuntime(18687): Process: com.example.simplegamer003.registerapp, PID: 18687 
03-07 22:54:51.555: E/AndroidRuntime(18687): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.simplegamer003.registerapp/com.example.simplegamer003.registerapp.SpinnerActivity}: java.lang.ClassCastException: android.widget.LinearLayout cannot be cast to android.widget.Spinner 
03-07 22:54:51.555: E/AndroidRuntime(18687): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2450) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2520) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at android.app.ActivityThread.-wrap11(ActivityThread.java) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at android.os.Handler.dispatchMessage(Handler.java:102) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at android.os.Looper.loop(Looper.java:148) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at android.app.ActivityThread.main(ActivityThread.java:5466) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at java.lang.reflect.Method.invoke(Native Method) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
03-07 22:54:51.555: E/AndroidRuntime(18687): Caused by: java.lang.ClassCastException: android.widget.LinearLayout cannot be cast to android.widget.Spinner 
03-07 22:54:51.555: E/AndroidRuntime(18687): at com.example.simplegamer003.registerapp.SpinnerActivity.onCreate(SpinnerActivity.java:22) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at android.app.Activity.performCreate(Activity.java:6251) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108) 
03-07 22:54:51.555: E/AndroidRuntime(18687): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2403) 
03-07 22:54:51.555: E/AndroidRuntime(18687): ... 9 more

，这里是我的代码

public class SpinnerActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener{ 

private Spinner spinner; 
private static final String[] sports = { 
     "Hockey","Cricket","Football","Basketball","Badminton","Tennis" 
}; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_spinner); 

    spinner = (Spinner)findViewById(R.id.spinner); 
    ArrayAdapter<String> adapter; 
    adapter = new ArrayAdapter<String>(this, 
      android.R.layout.simple_spinner_item,sports); 

    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner.setAdapter(adapter); 
} 

@Override 
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
    String item = parent.getItemAtPosition(position).toString(); 
} 

@Override 
public void onNothingSelected(AdapterView<?> parent) { 
} 
}

我不知道为什么我收到此错误，请谁能告诉我。

来源

2016-03-07 Anirudh Sohil

'java.lang.ClassCastException：android.widget.LinearLayout不能转换为android.widget.Spinner' – tyczj