[Android] 액션바(actionBar) 제거하기

ActionBar 있는 경우 / 없는 경우

 

app > manifests > AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="패키지명">
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"> <!-- 이부분-->
        <activity android:name=".LoginActivity"></activity>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

android:theme="@style/AppTheme"

아래와 같이 변경합니다.

android:theme="@style/Theme.AppCompat.Light.NoActionBar"