无法解析Android中的方法'execute（）' _android

【无法解析Android中的方法' execute（）' 】登山则情满于山，观海则意溢于海。这篇文章主要讲述无法解析Android中的方法' execute（）' 相关的知识，希望能为你提供帮助。
我试图在我的一个Circular ProgressBar中实施fragment。
我希望使用AsyncTask类以及其他后台进程来实现这一点，我希望progress bar也能更新onProgressUpdate()方法。
这是我的Fragment实现ProgressBar：

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {// Inflate the layout for this fragment rootView = inflater.inflate(R.layout.playlist_fragment, container, false); // Setting up progressBar progressBar = (ProgressBar) rootView.findViewById(R.id.progressBar); progressBar.setProgress(0); return rootView; }

从Fragment中调用AsyncTask类，它说无法在setProgressBr()解析方法。我想我没有适当地传递参数。

new GetPlaylistAsyncTask(mYouTubeDataApi,getContext(),PlaylistFragment.this) .setProgressBar(progressBar) .execute(playlistVideos.playlistId, playlistVideos.getNextPageToken());

这是我的AsyncTask类：

public class GetPlaylistAsyncTask extends AsyncTask< String, Integer, Pair< String, List< Video> > > { private static final String TAG = "GetPlaylistAsyncTask"; private static final Long YOUTUBE_PLAYLIST_MAX_RESULTS = 10L; //see: https://developers.google.com/youtube/v3/docs/playlistItems/list private static final String YOUTUBE_PLAYLIST_PART = "snippet"; private static final String YOUTUBE_PLAYLIST_FIELDS = "pageInfo,nextPageToken,items(id,snippet(resourceId/videoId))"; //see: https://developers.google.com/youtube/v3/docs/videos/list private static final String YOUTUBE_VIDEOS_PART = "snippet,contentDetails,statistics"; // video resource properties that the response will include. private static final String YOUTUBE_VIDEOS_FIELDS = "items(id,snippet(title,description,thumbnails/high),contentDetails/duration,statistics)"; // selector specifying which fields to include in a partial response.private YouTube mYouTubeDataApi; Context mContext; ProgressBar bar; private AsyncResponse theListener; public void setProgressBar(ProgressBar bar) { this.bar = bar; }public GetPlaylistAsyncTask(YouTube api, Context context, PlaylistFragment frag ) { mYouTubeDataApi = api; mContext = context; theListener = (AsyncResponse)frag; }@Override protected Pair< String, List< Video> > doInBackground(String... params) { final String playlistId = params[0]; final String nextPageToken; if (params.length == 2) { nextPageToken = params[1]; } else { nextPageToken = null; }PlaylistItemListResponse playlistItemListResponse; try { playlistItemListResponse = mYouTubeDataApi.playlistItems() .list(YOUTUBE_PLAYLIST_PART) .setPlaylistId(playlistId) .setPageToken(nextPageToken) .setFields(YOUTUBE_PLAYLIST_FIELDS) .setMaxResults(YOUTUBE_PLAYLIST_MAX_RESULTS) .setKey(ApiKey.YOUTUBE_API_KEY) .execute(); } catch (IOException e) { e.printStackTrace(); return null; }if (playlistItemListResponse == null) { Log.e(TAG, "Failed to get playlist"); return null; }List< String> videoIds = new ArrayList(); // pull out the video id's from the playlist page for (PlaylistItem item : playlistItemListResponse.getItems()) { videoIds.add(item.getSnippet().getResourceId().getVideoId()); }// get details of the videos on this playlist page VideoListResponse videoListResponse = null; try { videoListResponse = mYouTubeDataApi.videos() .list(YOUTUBE_VIDEOS_PART) .setFields(YOUTUBE_VIDEOS_FIELDS) .setKey(ApiKey.YOUTUBE_API_KEY) .setId(TextUtils.join(",", videoIds)).execute(); } catch (IOException e) { e.printStackTrace(); }return new Pair(playlistItemListResponse.getNextPageToken(), videoListResponse.getItems()); }@Override protected void onPreExecute() {}@Override protected void onProgressUpdate(Integer... values) { if (this.bar != null) { bar.setProgress(values[0]); } }@Override protected void onPostExecute(Pair< String, List< Video> > result) { theListener.handleGetPlaylistResult(null,result); } }

将欣赏上述问题的快速解决方案。提前致谢。
答案.setProgressBar(progressBar)方法的返回类型为void，因此您无法像这样链接调用

new GetPlaylistAsyncTask(mYouTubeDataApi,getContext(),PlaylistFragment.this) .setProgressBar(progressBar) .execute(playlistVideos.playlistId, playlistVideos.getNextPageToken());

将您的setProgressBar()方法更改为以下内容，它应该可以正常工作

public GetPlaylistAsyncTask setProgressBar(ProgressBar bar) { this.bar = bar; return this; }

要么
如果您不想更改方法签名，请执行以下操作

final GetPlaylistAsyncTask getPlaylistAsyncTask = new GetPlaylistAsyncTask(mYouTubeDataApi,getContext(),PlaylistFragment.this); getPlaylistAsyncTask.setProgressBar(progressBar); getPlaylistAsyncTask.execute(playlistVideos.playlistId, playlistVideos.getNextPageToken());

同时确保两个参数playlistVideos.playlistId, playlistVideos.getNextPageToken()都是字符串。
另一答案你可以这样做

GetPlaylistAsyncTask playAsync=new (mYouTubeDataApi,getContext(),PlaylistFragment.this); playAsync.setProgressBar(progressBar); playAsync.execute(playlistVideos.playlistId, playlistVideos.getNextPageToken());

希望这对你有用。
另一答案你正在调用链中的方法。这样，每个方法都应该返回其调用的当前实例。修改您的方法，如下所示它将起作用。

public GetPlaylistAsyncTask setProgressBar(ProgressBar bar) { this.bar = bar; return this; }

另一答案您无法直接将进度添加到循环进度条，以下是我为解决此问题所做的工作。
添加一个drawable文件circular_progress.xml

< ?xml version="1.0" encoding="utf-8"?>

< item android:id="@android:id/secondaryProgress"> < shape android:innerRadius ="15dp" android:shape="ring" android:useLevel="true" android:thickness="4dp" > < gradient android:endColor="@color/blackBackground" android:startColor="@color/blackBackground" android:type="sweep" /> < /shape> < /item> < item android:id="@android:id/progress"> < rotate android:fromDegrees="270" android:pivotX="50%" android:pivotY="50%" android:toDegrees="270" > < shape android:innerRadius ="15dp" android:shape="ring" android:useLevel="true" android:thickness="4dp"> < rotate android:fromDegrees="0" android:pivotX="50%" android:pivotY="50%" android:toDegrees="360" /> < gradient android:endColor="#e1c25b" android:startColor="#e1c25b" android:type="sweep" /> < /shape> < /rotate> < /item>

在片段布局中添加进度条

< ProgressBar android:id="@+id/pb_download" style="@style/Base.Widget.AppCompat.ProgressBar.Horizontal" android:layout_width="match_parent" android:layout_height="match_parent" android:max="100" android:progress="75" android:progressDrawable="@drawable/circular_progress" />

现在您可以使用setProgress（）来更新进度。随意问任何疑问。