Wsrtjtyk

I have 1 toolbar, list view in 1 activity. 1 button in fragment. But toolbar overlaps the starting area of list. Button is displayed in the middle of bottom screen. But list item shows on the horizontal sides of button, which I do n ot want. My code is as belows -

public class RoomShareFragment extends Fragment {

    private Button button;

    View retView;

    public RoomShareFragment() {

    }



    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

                             Bundle savedInstanceState) {

        retView = inflater.inflate(R.layout.fragment_room_share, container, false);

        button = retView.findViewById(R.id.button1);

        DisplayMetrics displayMetrics = new DisplayMetrics();

        ((Activity)retView.getContext()).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);

        int height = displayMetrics.heightPixels;

        int width = displayMetrics.widthPixels;

        button.setX(width/2-100);

        button.setY(height-450);

        button.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {

                // Code here executes on main thread after user presses button

            }

        });

        return retView;

    }

}

public class RoomShare extends AppCompatActivity {



    DB2CursorAdapter DBAdapter;

    MessDatabase mdb;

    Cursor cursor;

    ListView listview;

    String s = "hi";

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_room_share);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

        setSupportActionBar(toolbar);

        String selectQuery = "SELECT  * FROM " + TempDataFromDB.TABLE_NAME /*+ " ORDER BY " + TempDataFromDB.COLUMN_MESS_NAME + " DESC"*/;

        this.deleteDatabase("ShareRoom_db");

        mdb = new MessDatabase(this);

        SQLiteDatabase db = mdb.getWritableDatabase();

        cursor = db.rawQuery(selectQuery,null);

        DBAdapter = new DB2CursorAdapter(this, cursor, 0);

            listview = (ListView) findViewById(R.id.listview);

            listview.setAdapter(DBAdapter);

            DBAdapter.notifyDataSetChanged();

    }

fragment_room_share.xml

   <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

        xmlns:app="http://schemas.android.com/apk/res-auto"

        xmlns:tools="http://schemas.android.com/tools"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        tools:context=".RoomShareFragment"

        tools:showIn="@layout/activity_room_share">



        <Button

            android:id="@+id/button1"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:padding="10dp"

            android:textColor="#ffffff"

            android:background="@drawable/draw"

            android:text="Buttons" />

        <TextView

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="RoomShare!"

            app:layout_constraintBottom_toBottomOf="parent"

            app:layout_constraintLeft_toLeftOf="parent"

            app:layout_constraintRight_toRightOf="parent"

            app:layout_constraintTop_toTopOf="parent" />



    </android.support.constraint.ConstraintLayout>

activity_room_share.xml

<?xml version="1.0" encoding="utf-8"?>

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".RoomShare">



   <android.support.design.widget.AppBarLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:theme="@style/AppTheme.AppBarOverlay">



        <android.support.v7.widget.Toolbar

            android:id="@+id/toolbar"

            android:layout_width="match_parent"

            android:layout_height="?attr/actionBarSize"

            android:background="?attr/colorPrimary"

            app:popupTheme="@style/AppTheme.PopupOverlay" />



    </android.support.design.widget.AppBarLayout>



    <ListView android:id="@+id/listview"

        android:layout_height="match_parent"

        android:layout_width="match_parent"

        android:layout_weight="5"/>



    <include layout="@layout/content_room_share" />







</android.support.design.widget.CoordinatorLayout>