Android RecyclerView with LinearLayout
I read about Google Material Design and was looking at the new Android RecyclerView. I am following the google tutorial but their example is very thin and I want to do more dynamic things with RecylerView and I was hoping someone could explain how to do this.
This is an example of Google RecyclerView adapter
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private String[] mDataset;
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class ViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public TextView mTextView;
public ViewHolder(TextView v) {
super(v);
mTextView = v;
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(String[] myDataset) {
mDataset = myDataset;
}
// Create new views (invoked by the layout manager)
@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.my_text_view, parent, false);
// set the view size, margins, paddings and layout parameters
...
ViewHolder vh = new ViewHolder((TextView)v);
return vh;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
// - get element from your dataset at this position
// - replace the contents of the view with that element
holder.mTextView.setText(mDataset[position]);
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return mDataset.length;
}
}
I have implemented this in my Android app and it worked successfully, but the layout they are using only contains one TextView.
Can someone explain how I can use this example for a layout that has multiple text views?
For example:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="?attr/listPreferredItemHeight"
android:gravity="center_vertical"
android:paddingLeft="8dp"
android:paddingRight="8dp">
<TextView
android:id="@+id/title"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_margin="8dp"/>
<TextView
android:id="@+id/text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_margin="8dp"/>
</LinearLayout>
How can I access the TextView separately and possibly change the attributes of the LinearLayout?
This is where I am following the Google RecyclerView tutorial
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You can retrieve TextViews with findViewById from bloated linear layout.
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private String[] mDataset;
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView mTitle;
public TextView mText
public ViewHolder(LinearLayout v) {
super(v);
mTitle = (TextView) v.findViewById(R.id.title);
mText = (TextView) v.findViewById(R.id.text);
}
}
.....
// Create new views (invoked by the layout manager)
@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.my_text_view, parent, false);
// set the view size, margins, paddings and layout parameters
ViewHolder vh = new ViewHolder((LinearLayout)v);
return vh;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.mTitle.setText(....);
holder.mText.setText(.....);
}
}
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