You can just set a ProgressBar
on the recycler_item.xml (replace recycler_item with your actual item file name) that will be inflated on a custom Adapter
.
Then set the visibility of the ProgressBar
as VISIBLE
every time the onBindViewHolder()
gets called.
Quick example:
ProgressBarAdapter.java (Where the real magic goes).
class ProgressBarAdapter extends RecyclerView.Adapter<ProgressBarAdapter.ViewHolder>{
public class ViewHolder extends RecyclerView.ViewHolder{
public TextView textView;
public ProgressBar progressBar;
public ViewHolder(View itemView){
super(itemView);
textView = (TextView) itemView.findViewById(R.id.text1);
progressBar = (ProgressBar) itemView.findViewById(R.id.progress1);
}
}
private List<String> mFiles;
private Context mContext;
public ProgressBarAdapter(List<String> files){
mFiles = files;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
mContext = parent.getContext();
LayoutInflater inflater = LayoutInflater.from(mContext);
View viewInflated = inflater.inflate(R.layout.recycler_item, parent, false);
return new ViewHolder(viewInflated);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
String file = mFiles.get(position);
TextView textView = holder.textView;
textView.setText(file);
holder.progressBar.setVisibility(View.VISIBLE);
holder.progressBar.setIndeterminate(true);
}
@Override
public int getItemCount() {
return mFiles.size();
}
}
MainActivity.java
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ArrayList<String> files = new ArrayList<>();
files.add("File 1");
files.add("File 2");
files.add("File 3");
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler1);
recyclerView.setAdapter(new ProgressBarAdapter(files));
recyclerView.setLayoutManager(new LinearLayoutManager(this));
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context=".MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler1"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
recycler_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<!-- This ProgressBar will get inflated for each ReyclerView item -->
<ProgressBar
android:id="@+id/progress1"
android:visibility="gone"
style="@style/Base.Widget.AppCompat.ProgressBar.Horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
The result:
