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xxx
2016-05-07
源自：Android-Service系列之多線程斷點(diǎn)續(xù)傳下載 3-1
正在回答
private DbHelper(Context context) { ? ?super(context, DB_NAME, null, VERSION);}private static Context context;public static DbHelper getInstance(Context context) { ? ?DbHelper.context = context; ? ?return InstanceHolder.helper;}private static class InstanceHolder{ ? ?private static final DbHelper helper = new DbHelper(context);}
好像可以這樣寫
舉報(bào)
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2016-05-11
private DbHelper(Context context) {
? ?super(context, DB_NAME, null, VERSION);
}
private static Context context;
public static DbHelper getInstance(Context context) {
? ?DbHelper.context = context;
? ?return InstanceHolder.helper;
}
private static class InstanceHolder{
? ?private static final DbHelper helper = new DbHelper(context);
}
好像可以這樣寫