Java 我们如何从另一个没有';不包含那个片段吗?
我有一个活动课:IdeaBoxActivity 这是活动的布局代码-Java 我们如何从另一个没有';不包含那个片段吗?,java,android,android-activity,fragment,adapter,Java,Android,Android Activity,Fragment,Adapter,我有一个活动课:IdeaBoxActivity 这是活动的布局代码- <?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"
<?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>
其中一个片段是:IdeasFragment
我还有一项活动,名为:HappyWallActivity
从这个活动中,我调用了一个名为:RecyclerAdapterSeeAll的适配器类
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());
}
}
}
公共类RecyclerAdapterSeeAll扩展了RecyclerView.Adapter{
私有列表模型happyseals;
私人语境;
私有int id=0;
私有字符串状态=”;
public RecyclerAdapterSeeAll(上下文上下文、列表模型HappySeals){
this.modelHappySealls=modelHappySealls;
this.context=上下文;
}
@凌驾
公共MyViewHolder onCreateViewHolder(视图组父级,int-viewType){
View View=LayoutInflater.from(parent.getContext()).flate(R.layout.row\u item\u see\u all,parent,false);
返回新的MyViewHolder(视图);
}
@凌驾
公共无效onBindViewHolder(MyViewHolder,int位置){
holder.tvName.setText(modelHappySealls.get(position.getName());
holder.tvDetails.setText(modelHappySealls.get(position.getDetails());
setItemClickListener(新的ItemClickListener(){
@凌驾
公共区域(内部位置){
}
});
}
@凌驾
public int getItemCount(){
返回modelHappySealls.size();
}
公共类MyViewHolder扩展了RecyclerView.ViewHolder实现了View.OnClickListener{
TextView tvName,tvDetails;
ItemClickListener ItemClickListener;
公共MyViewHolder(查看项目视图){
超级(项目视图);
tvName=itemView.findViewById(R.id.textview\u name\u see\u all);
tvDetails=itemView.findViewById(R.id.textview\u happy\u post\u see\u all);
}
public void setItemClickListener(ItemClickListener ItemClickListener){
this.itemClickListener=itemClickListener;
setOnClickListener(这个);
}
@凌驾
公共void onClick(视图){
this.itemClickListener.onItemClick(this.getLayoutPosition());
}
}
}
在这个类中,holder.setItemClickListener我想调用IdeaBoxActivity的IdeasFragment
有没有办法做到这一点?如果是,请帮助我编写应该有效的代码。您必须使用相同的Ideas片段实例,方法是将在
new IdeasFragment()
上生成的原始实例存储到全局变量,或者在执行new recycleradapterseall(IdeasFragment实例)时传递该实例
并像那样使用它。无论哪种方法,这里的想法都是在两个类上使用相同的实例
然后在“侦听器”上单击:
public void setItemClickListener ( ItemClickListener itemClickListener){
IdeaBoxActivity.myInstance.start(); // call the function needed to start the IdeasFragment here
}
很抱歉,我没有正确地获取它,您能帮我解决我应该在onItemClick方法中编写的代码吗?您想在setItemClickListener和ideaboxactivity中执行什么操作?要调用它的函数,您需要执行ideaboxactivity.myInstance.functionName(参数)。这有帮助吗?从setItemClickListener我只想启动我的IdeAsFragments注意,您不应该将IdeaBoxActivity实例化为
new IdeaBoxActivity()
,以便能够使用myInstance变量。它是一个静态变量,这意味着在其他地方使用基类不需要对基类的引用。虽然,您可能必须导入该类,但仅此而已。
public static IdeasFragment myInstance= new IdeasFragment();
private void setupViewPager(ViewPager viewPager) {
SectionPageadapter sectionPageadapter = new
SectionPageadapter(getSupportFragmentManager());
sectionPageadapter.addFragment(myInstance, "My Ideas");
viewPager.setAdapter(sectionPageadapter);
}
public void setItemClickListener ( ItemClickListener itemClickListener){
IdeaBoxActivity.myInstance.start(); // call the function needed to start the IdeasFragment here
}