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

        setTheme(android.R.style.Theme_Light);
        setContentView(R.layout.main);
    }

초록색으로 표시된 부분이 에러는 안나는데
 배경이 흰색으로 안바뀌네요 (그림 첨부함)




이렇게 말고 AndroidManifest.xml 에서 <application android:thema = "@android:sttle/Theme_Black"></application>
이렇게 넣으면 thema를 찾을 수 없다고 나옵니다...

어떻게 해야될까요?? 좋은 답변 기대합니다.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.company.helloandroid"
      android:versionCode="1"
      android:versionName="1.0.0">
<application android:thema = "@android:sttle/Theme_Black"></application>
   
<application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".HelloAndroid"
                  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>