我创建了一个新项目选项卡式视图。我想要在我的主屏幕上的三个布局第一个家庭第二类第三喜欢。我有Home活动的代码，这是代码在这里的片段活动
public class HomeFragment extends android.support.v4.app.Fragment {
public HomeFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_home, container, false);
}
}
我还有另一项活动，即视频播放列表。我想在我的家庭片段页面中显示播放列表活动，但我太困惑了，对Android很新，我不知道该怎么做。
视频播放列表的代码在这里。如何在homeFragment类中调用此代码？我尝试了太多方法，但太糊涂了。
我想在我的家庭部分实施代码
public ProgressBar nextBar;
List<String> next_title;
List title;
List vid;
List<String> next_vid;
ArrayList<Videos> videos=new ArrayList<Videos>();
Videos video;
ArrayList<Videos> toclear=new ArrayList<Videos>();
List<Videos> fav = new ArrayList<Videos>();
InterstitialAd mInterstitialAd;
ListView listview;
Toolbar toolbar,favourite;
int menu_id;
LinearLayout layout, no_fav;
private HttpHandler parserVideo;
String nextPageToken;
String apiKey = "AIzaSyDD73ZAzcR6bXa1qOv8YZY3fFmNwfTPs48";
String url;
Main_activity_adapter search;
Main_activity_adapter adapter;
String url_home= "https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&maxResults=15&playlistId=PLQGGrzFoybiOks7f2BReNzNwkRw3cN6RB&key="+apiKey+"";
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.video_sec);
nextBar = (ProgressBar) findViewById(R.id.nextProgress);
layout = (LinearLayout) findViewById(R.id.linlaHeaderProgress);
url = url_home;
listview = (ListView) findViewById(R.id.listview);
no_fav = (LinearLayout)findViewById(R.id.no_favourit);
no_fav.setVisibility(View.GONE);
parserVideo = new HttpHandler();
getVideosPlaylist videosplaylist = new getVideosPlaylist();
videosplaylist.execute();
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
listview.setOnScrollListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
final MenuItem myActionMenuItem = menu.findItem( R.id.action_search);
final SearchView searchView = (SearchView) myActionMenuItem.getActionView();
final String toolbar_name = toolbar.getTitle().toString();
MenuItemCompat.setOnActionExpandListener(myActionMenuItem, new MenuItemCompat.OnActionExpandListener() {
@Override
public boolean onMenuItemActionExpand(MenuItem item) {
return true;
}
@Override
public boolean onMenuItemActionCollapse(MenuItem item) {
updateList();
return true;
}
});
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String s) {
if (!s.isEmpty()) {
setSearch();
search.getFilter().filter(s);
}
return false;
}
});
return true;
}// end of toolbar control
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
return super.onOptionsItemSelected(item);
}
public void updateList(){
adapter = new Main_activity_adapter(this, videos, false);
listview.setAdapter(adapter);
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
Videos v = (Videos) adapter.getItemAtPosition(arg2);
Intent n = new Intent(Videos_activity.this, PlayingVideo.class);
n.putExtra("vid", v.getVid().toString());
n.putExtra("title", v.getTitle().toString());
startActivity(n);
}
}
);
}
JSONObject jp_obj;
JSONArray jar_array;
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
String toolbar_check = toolbar.getTitle().toString();
switch(view.getId()){
case R.id.listview:
final int lastItem = firstVisibleItem + visibleItemCount;
if (lastItem == totalItemCount) {
if(toolbar_check!="Favourites") {
OnScrollList onscroll = new OnScrollList();
onscroll.execute();
}
}
}
}
class getVideosPlaylist extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... params) {
jp_obj = parserVideo.getJsonFromYoutube(url);
try {
if (jp_obj.has("nextPageToken")) {
nextPageToken = jp_obj.getString("nextPageToken");
}
jar_array = new JSONArray(jp_obj.getString("items"));
if(jp_obj != null) {
JSONObject c = jar_array.getJSONObject(0);
String json_check = c.getJSONObject("snippet").getString("title");
if (json_check == null) {
} else {
title = new ArrayList<String>(jar_array.length());
vid = new ArrayList<>(jar_array.length());
for (int j = 0; j < jar_array.length(); j++) {
c = jar_array.getJSONObject(j);
String str = c.getJSONObject("snippet").getString("title");
str = new String(str.replaceAll("\\['\\]", ""));
String link = c.getJSONObject("snippet").getJSONObject("resourceId").getString("videoId");
video = new Videos(str, link);
videos.add(video);
}
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onCancelled(){
super.onCancelled();
}
@Override
protected void onPreExecute() {
layout.setVisibility(View.VISIBLE);
super.onPreExecute();
}
@Override
protected void onPostExecute(String s) {
updateList();
layout.setVisibility(View.GONE);
cancel(true);
super.onPostExecute(s);
}
}
class OnScrollList extends AsyncTask<String,String,String>{
@Override
protected String doInBackground(String... params) {
if (nextPageToken!=null){
String nextPage = "&pageToken="+nextPageToken+"";
JSONObject next = parserVideo.getJsonFromYoutube(url+nextPage);
try {
JSONArray array = new JSONArray(next.getString("items"));
if (next != null) {
JSONObject c = array.getJSONObject(0);
String json_check = c.getJSONObject("snippet").getString("title");
if (json_check == null) {
} else {
next_title = new ArrayList<String>(array.length());
next_vid = new ArrayList<String>((array.length()));
for (int j = 0; j < array.length(); j++) {
c = array.getJSONObject(j);
String str = c.getJSONObject("snippet").getString("title");
str = new String(str.replaceAll("\'", ""));
next_title.add(str);
String nextLink = c.getJSONObject("snippet").getJSONObject("resourceId").getString("videoId");
next_vid.add(nextLink);
video = new Videos(str, nextLink);
toclear.add(video);
}
}
}if (next.has("nextPageToken")){
nextPageToken = next.getString("nextPageToken");
}else if(!next.has("nextPageToken")){
nextPageToken = null;}
} catch (JSONException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onCancelled(){
super.onCancelled();
}
@Override
protected void onPostExecute(String s) {
videos.addAll(toclear);
adapter.notifyDataSetChanged();
nextBar.setVisibility(View.GONE);
toclear.clear();
cancel(true);
super.onPostExecute(s);
}
@Override
protected void onPreExecute() {
nextBar.setVisibility(View.VISIBLE);
super.onPreExecute();
}
}
public void setSearch()
{
search = new Main_activity_adapter(Videos_activity.this, videos, true);
listview.setAdapter(search);
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
Videos v = (Videos)search.getItemAtPosition(arg2);
Intent n = new Intent(Videos_activity.this, PlayingVideo.class);
n.putExtra("vid", v.getVid().toString());
n.putExtra("title", v.getTitle().toString());
startActivity(n);
}
}
);
}
public void favouritList(){
Main_activity_adapter favourit_adapter = new Main_activity_adapter(this, videos, false);
listview.setAdapter(favourit_adapter);
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
Videos v = (Videos) adapter.getItemAtPosition(arg2);
Intent n = new Intent(Videos_activity.this, PlayingVideo.class);
n.putExtra("vid", v.getVid().toString());
n.putExtra("title", v.getTitle().toString());
startActivity(n);
}
}
);
}
答案 0 :(得分：0)
首先，您需要了解Activity包含片段，反之亦然。因此，让您的想法成真的一种方法是让您的活动包含三个片段：
要将数据从活动发送到片段，通常使用Bundle对象。 然后创建片段的实例并通过setArguments（yourBundle）方法将bundle放在那里。
这是主要的想法，如果你想要细节，那么阅读官方文档并在SOF上使用搜索。
答案 1 :(得分：0)
在public static String test="";中定义类似Activity的变量，然后在Fragment中将其变为String test1=ActivityName.test;，现在test的值为test1
答案 2 :(得分：0)
使用Bundle：
Fragment fragment = new YourFragment();
Bundle bundle = new Bundle();
bundle.putString("yourArg","yourType"); //this could be String, int, float,etc
fragment.setArguments(bundle);
getSupportFragmentManager().beginTransaction().replace(R.id.yourContainer,fragment).commit();
并在你的片段中onCreateView：
Bundle bundle = getArguments();