When I try to draw the circle nothing appears on the screen

Question

Here is my MainActivity file code:

    public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
    }
}

Here is my activity_main.xml code:

     <?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="com.example.vinaykumar.sample.MainActivity">


    <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>

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


    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        app:srcCompat="@android:drawable/ic_dialog_email" />

    <View android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_centerInParent="true"
        android:background="@drawable/myfile"/>
     </android.support.design.widget.CoordinatorLayout>

Here is my myfile.xml code (in which I am creating a circle)

  <?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>

    <shape xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="oval">
        <stroke
            android:width="1dp"
            android:color="#78d9ff"/>
    </shape>
</item>
</selector>

Above is the image of the file location

My question is when I run my program, it doesn't show anything on the screen or not create the circle. I am new to android, so I don't know what am I doing wrong. Sorry, if it's a lot of code, but I think it'll be more clear if I show everything in my program. Any help is appreciated!

Answer 1

Mistakes:

1)The way you're doing to show drawable over toolbar is incorrect.

2)Drawable file you are designed gives you a OVAL shape instead of CIRCLE shape.

My Solutions:

Solution 1) Xml Code:

 <?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=".MainActivity">


      <android.support.design.widget.AppBarLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
         >


 <!-----------------  THIS IS TOOLBAR TAG, you're using ---------------------->
        <android.support.v7.widget.Toolbar                   
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            >

        <View android:layout_width="50dp"
            android:layout_height="50dp"
            android:layout_centerInParent="true"
            android:background="@drawable/myfile"/>

 </android.support.v7.widget.Toolbar>


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



      <android.support.design.widget.FloatingActionButton
          android:id="@+id/fab"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_gravity="bottom|end"
          android:layout_margin="40dp"
          app:srcCompat="@android:drawable/ic_dialog_email" />

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

Solution 2) myfile.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>

    <shape xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="oval">
        <stroke
            android:width="1dp"
            android:color="#78d9ff"/>

        <size
            android:width="120dp"
            android:height="120dp"/>
    </shape>
</item>
</selector>

<----------------------------------------------------------------------------------------------------------------------------->

Edited Code After conversation

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

             <View android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:layout_centerInParent="true"
                    android:layout_centerInParent="true"
                    android:background="@drawable/myfile"/>

 </RelativeLayout>

MainActivity.java:-

  public class MainActivity extends AppCompatActivity  {
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

    }

myfile.xml:-

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>

    <shape xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="oval">
        <stroke
            android:width="1dp"
            android:color="#78d9ff"/>

        <size
            android:width="120dp"
            android:height="120dp"/>
    </shape>
</item>
</selector>