I write this activity in android studio, but I try to Switch to a RecyclerView r
ID: 3727003 • Letter: I
Question
I write this activity in android studio, but I try to Switch to a RecyclerView rather than a list of buttons, How can do that
package com.exampl.home;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class MainFragment extends Fragment {
private FavoritePage mFavoritePage;
private List<Button> buttons;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_main, container, false);
buttons = new ArrayList<>();
buttons.add((Button) v.findViewById(R.id.button1));
buttons.add((Button) v.findViewById(R.id.button2));
buttons.add((Button) v.findViewById(R.id.button3));
buttons.add((Button) v.findViewById(R.id.button4));
buttons.add((Button) v.findViewById(R.id.button5));
buttons.add((Button) v.findViewById(R.id.button6));
buttons.add((Button) v.findViewById(R.id.button7));
buttons.add((Button) v.findViewById(R.id.button8));
final DataBase db = DataBase.getInstance();
for (int i=0;i<buttons.size();i++){
final int finalI = i;
buttons.get(i).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
db.getPage(finalI).incrementVisitCount();
Intent intent = DetailActivity.newIntent(getContext(),finalI);
intent.putExtra(DetailActivity.URL_KEY, db.getPage(finalI).getUrl());
intent.putExtra(DetailActivity.VISIT_KEY, db.getPage(finalI).getVisitCount());
try {
db.save(new File(getContext().getFilesDir(), DataBase.fName));
} catch (IOException e) {
//Toast.makeText(MainActivity,"Coud not save a data",Toast.LENGTH_SHORT).show();
Toast.makeText(getContext(), "Failed to save data: "+e.getMessage(), Toast.LENGTH_LONG).show();
}
startActivity(intent);
}
});
}
updateUI();
return v;
}
private void updateUI() {
final DataBase db = DataBase.getInstance();
for (int i = 0; i < buttons.size() && i < db.getPageCount(); i++) {
buttons.get(i).setText(db.getPage(i).getName());
}
for (int i = DataBase.getInstance().getPageCount(); i < buttons.size(); i++) {
buttons.get(i).setVisibility(View.INVISIBLE);
}
}
}
Explanation / Answer
You should use this code in your XML file for Rec
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical" />
Then you can use this template to add data to your page -
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mAdapter = new MoviesAdapter(movieList);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(mAdapter);
prepareMovieData();//For adding data in the Recycler View
}