I added recyclerview and then When I run application it stops.
1)MainActivity.java
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
RecyclerView recyclerView;
RecyclerView.LayoutManager layoutManager;
RecyclerView.Adapter adapter;
@Override
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.card_relative_1_9);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
adapter = new RecyclerAdapter();
recyclerView.setAdapter(adapter);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
android.app.FragmentManager fm = getFragmentManager();
fm.beginTransaction().add(R.id.content_frame, new about_fragment()).commit();
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
android.app.FragmentManager fn = getFragmentManager();
int id = item.getItemId();
if (id == R.id.nav_9) {
fn.beginTransaction().replace(R.id.content_frame, new first_class_9()).commit();
} else if (id == R.id.nav_10) {
fn.beginTransaction().replace(R.id.content_frame, new first_class_10()).commit();
} else if (id == R.id.nav_11) {
fn.beginTransaction().replace(R.id.content_frame, new first_class_11()).commit();
} else if (id == R.id.nav_12) {
fn.beginTransaction().replace(R.id.content_frame, new first_class_12()).commit();
} else if (id == R.id.nav_aboutUs) {
fn.beginTransaction().replace(R.id.content_frame, new about_fragment()).commit();
} else if (id == R.id.nav_feedback) {
fn.beginTransaction().replace(R.id.content_frame, new feedback_fragment()).commit();
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
2)RecyclerAdapter.java
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {
private String[] SubTxt = {"NCERT Solution",
"Notes",
"Sample Papers"};
private int[] SubImage = { R.drawable.ic_answers_black_48dp,
R.drawable.ic_notes_black_48dp,
R.drawable.ic_sample_papers_black_48dp};
class ViewHolder extends RecyclerView.ViewHolder{
public int currentItem;
public ImageView itemImage;
public TextView itemTitle;
public ViewHolder(View itemView) {
super(itemView);
itemImage = (ImageView)itemView.findViewById(R.id.SubImage);
itemTitle = (TextView)itemView.findViewById(R.id.SubTxt);
itemView.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View v) {
int position = getAdapterPosition();
Snackbar.make(v, "Click detected on item " + position,
Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.recycler_1_9, null);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, int i) {
viewHolder.itemTitle.setText(SubTxt[i]);
viewHolder.itemImage.setImageResource(SubImage[i]);
}
@Override
public int getItemCount() {
return SubTxt.length;
}
}
3)recycler_1_9.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/SubImage"
android:padding="10dp"
android:src="@drawable/ic_answers_black_48dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="NAME"
android:id="@+id/SubTxt"
android:padding="10dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/SubImage"/>
</RelativeLayout>
4)first_class_9.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/frame_nine_page_first">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_nine_page_first"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
class="android.support.v7.widget.RecyclerView"/>
</LinearLayout>
MyProject
https://drive.google.com/file/d/0B_YQAdQ2qIfiYjI2R2JTWU4yQVE/view?usp=sharing
