Android 无论我做什么,片段中的recyclerview都不会更新
现在已经一周了,我真的非常渴望找到一个解决方案,因为我需要在这周内向我的客户提交更新。因此,我在一个片段中有一个RecycleView,其中填充了使用volley库从web服务获取的数据。如果向数据库添加了新数据,我希望recyclerview重新加载/更新以实现更改或新添加的更改。现在,我已经尝试了很多方法,但都没有达到我所需要的。我尝试了以下方法: -我的适配器上的notifyDataSetChanged()位于处理程序内部的onclick内部 -adapter.notifyItemRangeChanged(0,adapter.getItemCount()) -处理程序中的recyclerView.invalidate() -分离并附加当前片段 -还尝试了下面的代码。它之所以有效,是因为它刷新了整个活动,并返回到初始片段,即第一页Android 无论我做什么,片段中的recyclerview都不会更新,android,android-fragments,android-recyclerview,android-volley,Android,Android Fragments,Android Recyclerview,Android Volley,现在已经一周了,我真的非常渴望找到一个解决方案,因为我需要在这周内向我的客户提交更新。因此,我在一个片段中有一个RecycleView,其中填充了使用volley库从web服务获取的数据。如果向数据库添加了新数据,我希望recyclerview重新加载/更新以实现更改或新添加的更改。现在,我已经尝试了很多方法,但都没有达到我所需要的。我尝试了以下方法: -我的适配器上的notifyDataSetChanged()位于处理程序内部的onclick内部 -adapter.notifyItemRang
Intent intent = getActivity().getIntent();
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_NO_ANIMATION);
getActivity().overridePendingTransition(0, 0);
getActivity().finish();
getActivity().overridePendingTransition(0, 0);
startActivity(intent);
片段类
public class AddPlaylist extends Fragment {
RecyclerView recyclerView;
RecyclerAdapter adapter;
String[] id,title;
ArrayList<String> artist;
TextView text;
CreatePlaylist createPlaylist;
private CoordinatorLayout coordinatorLayout;
private FloatingActionButton fab;
View view;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.addplaylist, container, false);
coordinatorLayout = (CoordinatorLayout) view.findViewById(R.id
.coordinatorLayout);
fab = (FloatingActionButton) view.findViewById(R.id.fab);
text = (TextView) view.findViewById(R.id.text);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showInputDialog();
}
});
id = getArguments().getStringArray("id");
title = getArguments().getStringArray("title");
artist = new ArrayList<String>(Arrays.asList(title));
recyclerView= (RecyclerView) view.findViewById(R.id.my_recycler_view);
adapter = new RecyclerAdapter("addplaylist", id, artist, getActivity());
recyclerView.setAdapter(adapter);
recyclerView.invalidate();
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
adapter.notifyItemRangeChanged(0, adapter.getItemCount());
final Handler mHandler = new Handler();
mHandler.post(new Runnable() {
@Override
public void run() {
adapter.notifyDataSetChanged();
adapter.notifyItemRangeChanged(0, adapter.getItemCount());
recyclerView.invalidate();
Fragment frg = null;
frg = getFragmentManager().findFragmentByTag("playlist");
Bundle bundle = new Bundle();
AddPlaylist addPlaylist = new AddPlaylist();
bundle.putStringArray("id", JsonArray.ids);
bundle.putStringArray("title", JsonArray.titles);
addPlaylist.setArguments(bundle);
final FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.detach(addPlaylist);
ft.attach(addPlaylist);
ft.commit();
}
});
return view;
}
protected void showInputDialog() {
// get prompts.xml view
LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
View promptView = layoutInflater.inflate(R.layout.input_dialog, null);
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(getActivity());
alertDialogBuilder.setView(promptView);
final EditText editText = (EditText) promptView.findViewById(R.id.edittext);
// setup a dialog window
alertDialogBuilder.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//text.setText("Hello, " + editText.getText());
createPlaylist.createPlaylist(editText.getText().toString());
/*Intent intent = getActivity().getIntent();
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_NO_ANIMATION);
getActivity().overridePendingTransition(0, 0);
getActivity().finish();
getActivity().overridePendingTransition(0, 0);
startActivity(intent);*/
/*Bundle bundle = new Bundle();
Collections collections = new Collections();
AddPlaylist addPlaylist = new AddPlaylist();
bundle.putStringArray("id", JsonArray.ids);
bundle.putStringArray("title", JsonArray.titles);
bundle.putString("fragment", "addfragment");
addPlaylist.setArguments(bundle);
Fragment frg = null;
frg = getFragmentManager().findFragmentByTag("playlist");
final FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.detach(collections);
ft.attach(frg);
ft.commit();*/
/*getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
adapter.notifyDataSetChanged();
}
});*/
/*FragmentManager fragmentTransaction = getFragmentManager();
android.app.FragmentTransaction transaction = fragmentTransaction.beginTransaction();
Bundle bundle = new Bundle();
AddPlaylist addPlaylist = new AddPlaylist();
bundle.putStringArray("id", JsonArray.ids);
bundle.putStringArray("title", JsonArray.titles);
addPlaylist.setArguments(bundle);
transaction.addToBackStack("xyz");
transaction.add(R.id.containerView, addPlaylist);
//transaction.setTransition(FragmentTransaction.TRANSIT_ENTER_MASK);
transaction.commit();*/
adapter.notifyItemRangeChanged(0, adapter.getItemCount());
}
})
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
// create an alert dialog
AlertDialog alert = alertDialogBuilder.create();
alert.show();
}
@UiThread
protected void dataSetChanged() {
adapter.notifyDataSetChanged();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
id = getArguments().getStringArray("id");
title = getArguments().getStringArray("title");
artist = new ArrayList<String>(Arrays.asList(title));
adapter = new RecyclerAdapter("addplaylist", id, artist, getActivity());
adapter.notifyDataSetChanged();
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try{
createPlaylist = (CreatePlaylist) activity;
}catch(Exception e) {
}
}
public interface CreatePlaylist{
void createPlaylist(String name);
}
}
public类AddPlaylist扩展片段{
回收视图回收视图;
回收适配器;
字符串[]id,标题;
艺术大师;
文本查看文本;
创建播放列表创建播放列表;
私人协调人布局协调人布局;
私人浮动按钮制造厂;
视图;
@可空
@凌驾
CreateView上的公共视图(布局、充气机、视图组容器、捆绑包保存状态){
视图=充气机。充气(R.layout.addplaylist,container,false);
coordinatorLayout=(coordinatorLayout)视图
.协调布局);
fab=(FloatingActionButton)view.findViewById(R.id.fab);
text=(TextView)view.findViewById(R.id.text);
fab.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
showInputDialog();
}
});
id=getArguments().getStringArray(“id”);
title=getArguments().getStringArray(“title”);
艺术家=新的ArrayList(Arrays.asList(title));
recyclerView=(recyclerView)view.findViewById(R.id.my\u recycler\u视图);
adapter=new RecyclerAdapter(“addplaylist”,id,artist,getActivity());
recyclerView.setAdapter(适配器);
recyclerView.invalidate();
recyclerView.setHasFixedSize(true);
setLayoutManager(新的LinearLayoutManager(getActivity());
adapter.notifyItemRangeChanged(0,adapter.getItemCount());
最终处理程序mHandler=新处理程序();
mHandler.post(新Runnable(){
@凌驾
公开募捐{
adapter.notifyDataSetChanged();
adapter.notifyItemRangeChanged(0,adapter.getItemCount());
recyclerView.invalidate();
片段frg=null;
frg=getFragmentManager().findFragmentByTag(“播放列表”);
Bundle=新Bundle();
AddPlaylist AddPlaylist=新建AddPlaylist();
bundle.putStringArray(“id”,JsonArray.ids);
bundle.putStringArray(“title”,JsonArray.titles);
addPlaylist.setArguments(bundle);
final FragmentTransaction ft=getFragmentManager().beginTransaction();
ft.detach(添加播放列表);
ft.attach(添加播放列表);
ft.commit();
}
});
返回视图;
}
受保护的void showInputDialog(){
//获取prompts.xml视图
LayoutInflater LayoutInflater=LayoutInflater.from(getActivity());
View promptView=LayoutFlater.充气(R.layout.input_对话框,空);
AlertDialog.Builder alertDialogBuilder=新建AlertDialog.Builder(getActivity());
alertDialogBuilder.setView(promptView);
final EditText EditText=(EditText)promptView.findViewById(R.id.EditText);
//设置对话框窗口
alertDialogBuilder.setCancelable(false)
.setPositiveButton(“确定”,新的DialogInterface.OnClickListener(){
public void onClick(DialogInterface对话框,int-id){
//text.setText(“你好,”+editText.getText());
createPlaylist.createPlaylist(editText.getText().toString());
/*Intent Intent=getActivity().getIntent();
intent.addFlags(intent.FLAG_活动_清除_顶部| intent.FLAG_活动_新任务
|意图。标记活动(无动画);
getActivity().overridePendingTransition(0,0);
getActivity().finish();
getActivity().overridePendingTransition(0,0);
星触觉(意向)*/
/*Bundle=新Bundle();
集合=新集合();
AddPlaylist AddPlaylist=新建AddPlaylist();
bundle.putStringArray(“id”,JsonArray.ids);
bundle.putStringArray(“title”,JsonArray.titles);
bundle.putString(“fragment”、“addfragment”);
addPlaylist.setArguments(bundle);
片段frg=null;
frg=getFragmentManager().findFragmentByTag(“播放列表”);
final FragmentTransaction ft=getFragmentManager().beginTransaction();
ft.detach(集合);
固定支架(frg);
ft.commit()*/
/*getActivity().runOnUiThread(新的Runnable()){
@凌驾
公开募捐{
adapter.notifyDataSetChanged();
}
});*/
/*FragmentManager fragmentTransaction=getFragmentManager();
android.app.FragmentTransaction=FragmentTransaction.beginTransaction();
Bundle=新Bundle();
AddPlaylist AddPlaylist=新建AddPlaylist();
bundle.putStringArray(“id”,JsonArray.ids);
bundle.putStringArray(“title”,JsonArray.titles);
addPlaylist.setArguments(bundle);
交易
artist = new ArrayList<String>(Arrays.asList(title));
adapter = new RecyclerAdapter("addplaylist", id, artist, getActivity());
List<String> newArtist = new ArrayList<String>(Arrays.asList(title));
artist.clear();
artist.addAll(newArtist);
adapter.notifyDataSetChanged();