[英]how to call method of one fragment from another fragment class in android
[英]How can we call one fragment from another class that doesn't contain that fragment?
我有一個活動類: IdeaBoxActivity這是活動的布局代碼-
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.asif047">
<android.support.v4.widget.DrawerLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/dl"
>
<LinearLayout
android:id="@+id/flcontent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar_idea_box"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
app:contentInsetLeft="0dp"
app:contentInsetStart="16dp"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />
<android.support.design.widget.TabLayout
android:id="@+id/tabs_idea"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
app:tabTextColor="#ffffff"
/>
<android.support.v4.view.ViewPager
android:id="@+id/container_idea"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="@+id/nv"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#ffffff"
app:headerLayout="@layout/header"
app:itemIconTint="#000000"
app:itemTextColor="#000000"
app:menu="@menu/drawermenu"
>
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
</android.support.design.widget.CoordinatorLayout>
我在IdeaBoxActivity 中添加了一些片段。
我使用以下方法添加了片段-
private void setupViewPager(ViewPager viewPager) {
SectionPageadapter sectionPageadapter = new SectionPageadapter(getSupportFragmentManager());
sectionPageadapter.addFragment(new IdeasFragment(), "Ideas");
sectionPageadapter.addFragment(new WriteIdeaFragment(), "Write Idea");
sectionPageadapter.addFragment(new MyIdeasFragment(), "My Ideas");
viewPager.setAdapter(sectionPageadapter);
}
這些片段之一是: IdeasFragment
我有另一個活動,名為: HappyWallActivity從這個活動中,我調用了一個名為RecyclerAdapterSeeAll 的適配器類
public class RecyclerAdapterSeeAll extends RecyclerView.Adapter<RecyclerAdapterSeeAll.MyViewHolder>{
private List<ModelHappySeeAll> modelHappySeeAlls;
private Context context;
private int id = 0;
private String status = "";
public RecyclerAdapterSeeAll( Context context, List<ModelHappySeeAll> modelHappySeeAlls) {
this.modelHappySeeAlls = modelHappySeeAlls;
this.context = context;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_item_see_all, parent, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
holder.tvName.setText(modelHappySeeAlls.get(position).getName());
holder.tvDetails.setText(modelHappySeeAlls.get(position).getDetails());
holder.setItemClickListener(new ItemClickListener() {
@Override
public void onItemClick(int pos) {
}
});
}
@Override
public int getItemCount() {
return modelHappySeeAlls.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
TextView tvName, tvDetails;
ItemClickListener itemClickListener;
public MyViewHolder(View itemView) {
super(itemView);
tvName = itemView.findViewById(R.id.textview_name_see_all);
tvDetails = itemView.findViewById(R.id.textview_happy_post_see_all);
}
public void setItemClickListener ( ItemClickListener itemClickListener){
this.itemClickListener = itemClickListener;
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
this.itemClickListener.onItemClick(this.getLayoutPosition());
}
}
}
在這個類中holder.setItemClickListener我想調用IdeaBoxActivity的IdeasFragment 。
有沒有辦法做到這一點? 如果是,那么請幫助我編寫應該可以工作的代碼。
您必須通過可能將在new IdeasFragment()
上new IdeasFragment()
的原始實例存儲到全局變量來使用相同的 Ideas 片段實例,或者您可以在執行new RecyclerAdapterSeeAll(IdeasFragment instance)
時傳遞該實例並像這樣使用它。 無論哪種方式,這里的想法都是在兩個類上使用相同的實例。
public static IdeasFragment myInstance= new IdeasFragment();
private void setupViewPager(ViewPager viewPager) {
SectionPageadapter sectionPageadapter = new
SectionPageadapter(getSupportFragmentManager());
sectionPageadapter.addFragment(myInstance, "My Ideas");
viewPager.setAdapter(sectionPageadapter);
}
在點擊監聽器上:
public void setItemClickListener ( ItemClickListener itemClickListener){
IdeaBoxActivity.myInstance.start(); // call the function needed to start the IdeasFragment here
}
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