[英]Create Imageview when I click recyclerView item in tabLayout with ViewPager2
首先，我的應用程序是這樣的。 當我點擊 recyclerview 項目時，我想將 imageview 添加到片段 1，但 imageview 沒有出現我不知道這個問題提前謝謝你！
我試試這個：
SpaceEditAdapter.java （recyclerView 適配器）
public class SpaceEditAdapter extends RecyclerView.Adapter<SpaceEditAdapter.ItemViewHolder> {
public ArrayList<SpaceEditData> spaceData =new ArrayList<>();
@NonNull
@Override
public ItemViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType ){
View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.fragment_space_edit_item,parent,false);
}
@Override
public void onBindViewHolder(@NonNull ItemViewHolder holder, int position){
holder.onBind(spaceData.get(position));
}
@Override
public int getItemCount(){
return spaceData.size();
}
public void addItem(SpaceEditData d){
spaceData.add(d);
}
class ItemViewHolder extends RecyclerView.ViewHolder{
ImageView myItemImageView;
ItemViewHolder(View itemView){
super(itemView);
myItemImageView=itemView.findViewById(R.id.myItemImg);
myItemImageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = getAdapterPosition() ;
if (pos != RecyclerView.NO_POSITION) {
SpaceEditData item=spaceData.get(pos);
Bundle bundle=new Bundle();
bundle.putSerializable("num", item);
SpaceFragment sf=new SpaceFragment();
sf.setArguments(bundle);
}
}
});
}
void onBind(SpaceEditData data){
myItemImageView.setImageResource(data.getMyItemImg());
}
}
}
SpaceFragment.java （圖像中的 fragment1）
public class SpaceFragment extends Fragment {
private View v;
private ViewPager2 viewPager;
private TabLayout tabLayout;
private SpaceEditPaintFragment paintF;
private SpaceEditForestFragment forestF;
private SpaceEditSeaFragment seaF;
private SpaceEditMudFragment mudF;
private int count=1;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
v=inflater.inflate(R.layout.fragment_space, container, false);
createFragment();
createViewPager();
settingTabLayout();
ImageView imageView = new ImageView(v.getContext());
Bundle bundle=getArguments();
if(bundle!=null) {
SpaceEditData data=(SpaceEditData)bundle.getSerializable("num");
ConstraintLayout.LayoutParams layoutParams = new ConstraintLayout.LayoutParams(ConstraintLayout.LayoutParams.WRAP_CONTENT, ConstraintLayout.LayoutParams.WRAP_CONTENT);
imageView.setLayoutParams(layoutParams);
imageView.setImageResource(data.getMyItemImg());
spaceLay.addView(imageView);
}
return v;
}
private void createFragment(){
paintF=new SpaceEditPaintFragment();
forestF=new SpaceEditForestFragment();
seaF=new SpaceEditSeaFragment();
mudF=new SpaceEditMudFragment();
}
private void createViewPager(){
viewPager = (ViewPager2)v.findViewById(R.id.spaceEditViewpager);
SpaceEditViewPagerAdapter pagerAdapter=new SpaceEditViewPagerAdapter(getFragmentManager(),getLifecycle());
pagerAdapter.addFragment(paintF);
pagerAdapter.addFragment(forestF);
pagerAdapter.addFragment(seaF);
pagerAdapter.addFragment(mudF);
viewPager.setAdapter(pagerAdapter);
viewPager.setUserInputEnabled(false);
}
private void settingTabLayout(){
tabLayout=(TabLayout)v.findViewById(R.id.spaceEditTabLayout);
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener(){
@Override
public void onTabSelected(TabLayout.Tab tab) {
int pos = tab.getPosition();
switch(pos){
case 0:
viewPager.setCurrentItem(0);
break;
case 1:
viewPager.setCurrentItem(1);
break;
case 2:
viewPager.setCurrentItem(2);
break;
case 3:
viewPager.setCurrentItem(3);
break;
}
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
}
SpaceEditData.java （RecyclerView 項目）
import java.io.Serializable;
public class SpaceEditData implements Serializable {
private int myItemImg;
public int getMyItemImg() {
return myItemImg;
}
public void setMyItemImg(int myItemImg) {
this.myItemImg = myItemImg;
}
}
fragment_space.xml （圖像中的 fragment1）
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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:id="@+id/spaceShopFLay"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/lightBeige"
tools:context=".SpaceFragment">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/spaceLay"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/lightBeige">
<ImageView
android:id="@+id/spaceShop"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginStart="280dp"
android:layout_marginLeft="280dp"
android:layout_marginTop="20dp"
android:clickable="true"
android:contentDescription="@string/imageView"
android:focusable="true"
android:src="@drawable/ic_shop"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="@+id/spaceEdit"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginTop="20dp"
android:layout_marginStart="25dp"
android:layout_marginLeft="25dp"
android:contentDescription="@string/imageView"
android:src="@drawable/ic_edit"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toEndOf="@id/spaceShop"
android:clickable="true"
android:focusable="true" />
<com.example.zeve.StickerView
android:id="@+id/stickerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/spaceEditLay"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_marginTop="404dp"
android:background="@color/brown">
<com.google.android.material.tabs.TabLayout
android:id="@+id/spaceEditTabLayout"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_marginStart="10dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:tabGravity="center">
<com.google.android.material.tabs.TabItem
android:id="@+id/editPaintTab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/paint"></com.google.android.material.tabs.TabItem>
<com.google.android.material.tabs.TabItem
android:id="@+id/editForestTab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/forest"></com.google.android.material.tabs.TabItem>
<com.google.android.material.tabs.TabItem
android:id="@+id/editSeaTab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/sea"></com.google.android.material.tabs.TabItem>
<com.google.android.material.tabs.TabItem
android:id="@+id/editMudTab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/mud"></com.google.android.material.tabs.TabItem>
</com.google.android.material.tabs.TabLayout>
<androidx.viewpager2.widget.ViewPager2
android:id="@+id/spaceEditViewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical"
android:layout_marginTop="40dp"
android:layout_marginStart="10dp"
android:layout_marginLeft="10dp"
android:layout_marginEnd="20dp"
android:layout_marginRight="20dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintEnd_toEndOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>
fragment_space_edit_item.xml （recyclerView 項目 xml）
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="75dp"
android:layout_height="60dp"
android:layout_marginStart="20dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:orientation="vertical">
<ImageView
android:id="@+id/myItemImg"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginTop="5dp"
android:layout_gravity="center"
android:clickable="true"
android:focusable="true"/>
android:background="@color/lightBeige"
android:contentDescription="@string/imageView"
</LinearLayout>
這很愚蠢，但在你的fragment_space_edit_item.xml
<ImageView
android:id="@+id/myItemImg"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginTop="5dp"
android:layout_gravity="center"
android:clickable="true"
android:focusable="true"/>
android:background="@color/lightBeige"
android:contentDescription="@string/imageView"
如果是這樣的話，background 和 contentDescription 是錯誤的。
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