kaiyangjia

public abstract class XSingleton<T> {

    private T mInstance;

    protected abstract T create();

    /**
     * is this object ready for work?
     * That means is this object has been init by JVM.
     * This method is design for The Double Checked Lock Broken

kaiyangjia

import java.util.List;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ProviderInfo;
import android.content.pm.ResolveInfo;
import android.text.TextUtils;
/**