我正在尝试跟踪播放的Steam网址的历史记录,以及getCurrentPosition的值,以便用户能够恢复在该会话期间停止播放的视频。我的策略是使用两个Arraylists来存储数据,比较URL并将之前的位置填充到intent ads中。
我在打电话给我的getter时收到了NPE。以下是重要部分:
Getter / Setter类:
public class WatchedGS {
private ArrayList videoURL = new ArrayList();
private ArrayList resumeTime = new ArrayList();
public ArrayList getURL() {
return videoURL;
}
public void setURL(String videoURL) {
this.videoURL.add(videoURL);
Log.i("videoURL added: ", videoURL);
}
public ArrayList getresumeTime() {
return resumeTime;
}
public void setresumeTime(int time) {
this.resumeTime.add(time);
Log.i("videoTime added: ", ""+ time);
}
}
媒体播放器呼叫表面破坏,确认工作:
public void surfaceDestroyed(SurfaceHolder holder) {
watchedGS.setURL(urlString);
watchedGS.setresumeTime(player.getCurrentPosition());
player.release();
player = null;
finish();
}
MainActivity调用get,导致NPE:
WatchedGS historyList;
if (videoHistory){
int alSize = historyList.getURL().size();
if (historyList.getURL().contains(url)) {
Log.i("it's there!", url);
}
我确信我已经忽略了一些愚蠢的事情,并会欣赏我错过的任何指示。提前谢谢。
答案 0 :(得分:1)
WatchedGS historyList;
if (videoHistory){
int alSize = historyList.getURL().size();
if (historyList.getURL().contains(url)) {
Log.i("it's there!", url);
}
在调用historyList
之前,您尚未初始化getURL()
。