Application으로 싱글톤 만들기

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application name지정 안하면 에러뜬다 주의하자.

<application
    android:name=".뿅뿅뿅♡Application"
    android:allowBackup="true"
    android:hardwareAccelerated="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

public class 뿅뿅뿅♡Application extends Application {

    private static 뿅뿅뿅♡Application _instance;

    private ViewPageContoller curActivity;

    @Override
    public void onCreate() {
        super.onCreate();
        _instance = this;
        NotificationHelper.createNotificationChannel(this);
    }
    public static 뿅뿅뿅♡Application getInstance() {
        return _instance;
    }

    public void setCurActivity(ViewPageContoller activity) {
        this.curActivity = activity;
    }
    public ViewPageContoller getCurActivity() {
        return curActivity;
    }
}