我想在Recycler View中为每个项目设置不同的高度。通常我们每一行都得到相同的高度。但我需要不同的高度，例如，如果前三行的高度为70，那么我需要剩余的高度为0。我的代码如下。但是它没有正确设置。请建议我进行编辑。
public class MainActivity extends AppCompatActivity {
private RecyclerView rvListProfiles;
private ListProfileAdapter listProfileAdapter;
private String[] list = new String[]{"ABC","DEF","GHI","JKL","MNO"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rvListProfiles = findViewById(R.id.rvListProfiles);
listProfileAdapter = new ListProfileAdapter(list, this);
RecyclerView.LayoutManager mLayoutManager = new
LinearLayoutManager(getApplicationContext());
rvListProfiles.setLayoutManager(mLayoutManager);
rvListProfiles.setItemAnimator(new DefaultItemAnimator());
rvListProfiles.setAdapter(listProfileAdapter);
String listString = Arrays.toString(list);
System.out.println("List "+listString);
}
}
项目XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="@android:color/darker_gray"
android:padding="10dp"
android:id="@+id/parentLayout">
<ImageView
android:id="@+id/profileImage"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:src="@mipmap/love"
android:transitionName="imageTransition" />
<TextView
android:id="@+id/profileName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginStart="23dp"
android:layout_toEndOf="@+id/profileImage"
android:padding="2dp"
android:text="TextView"
android:textColor="@android:color/background_light"
android:textSize="18sp"
android:transitionName="nameTransition" />
<TextView
android:id="@+id/profileDesc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/profileImage"
android:layout_alignStart="@+id/profileName"
android:layout_marginTop="5dp"
android:maxLines="1"
android:padding="2dp"
android:text="@string/dummy_data"
android:textColor="@android:color/background_light"
android:textSize="12sp"
android:transitionName="descTransition" />
</RelativeLayout>
ViewHolder class
public class ListProfileViewHolder extends RecyclerView.ViewHolder {
public ImageView profileImage;
public TextView profileName;
public TextView profileDesc;
public RelativeLayout parentLayout;
public Context context;
public ListProfileViewHolder(View itemView, Context mContext) {
super(itemView);
this.context = mContext;
profileImage = itemView.findViewById(R.id.profileImage);
profileName = itemView.findViewById(R.id.profileName);
profileDesc = itemView.findViewById(R.id.profileDesc);
parentLayout = itemView.findViewById(R.id.parentLayout);
}
}
适配器类
public class ListProfileAdapter extends
RecyclerView.Adapter<ListProfileViewHolder> {
private String[] list;
private Context mContext;
private int height[] = {70,70,70,
0,0,0,0};
public ListProfileAdapter(String[] list, Context mContext) {
this.list = list;
this.mContext = mContext;
}
@Override
public ListProfileViewHolder onCreateViewHolder(ViewGroup parent, int
viewType) {
View layoutView =
LayoutInflater.from(parent.getContext()).inflate(R.layout.item_list,
null);
return new ListProfileViewHolder(layoutView, mContext);
}
@Override
public void onBindViewHolder(final ListProfileViewHolder holder, int
position) {
holder.parentLayout.setLayoutParams(new
RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
height[position]));
holder.profileName.setText(list[position]);
holder.profileImage.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view) {
Intent sharedIntent = new
Intent(mContext,SharedActivity.class);
sharedIntent.putExtra("name",holder.profileName.getText());
sharedIntent.putExtra("desc",holder.profileDesc.getText());
Pair[] pairs = new Pair[3];
pairs[0] = new Pair<View,String>
(holder.profileImage,"imageTransition");
pairs[1] = new Pair<View,String>
(holder.profileName,"nameTransition");
pairs[2] = new Pair<View,String>
(holder.profileDesc,"descTransition");
ActivityOptions options =
ActivityOptions.makeSceneTransitionAnimation((Activity)
mContext,pairs);
mContext.startActivity(sharedIntent,options.toBundle());
}
});
holder.parentLayout.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view) {
height = new int[]{0,0,0,
70,70,70,70,};
notifyDataSetChanged();
}
});
}
@Override
public int getItemCount() {
return list.length;
}
}