Hiding the Activity Title

You can also hide the title of an activity if desired ( Such as when you just want to display a status update to the user). To do so , use the requestWindowFeature() method and pass it the window .FEATURE_NO_TITLE constant, like This :

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Window;

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

Now you need change the theme in the AndoirdManifest.xml to a theme that has no title bar. Be sure to change all instances of "com.android" to whatever.package name your project is using.

package com.android.activity101;

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
            xmls:tool="http://schemas.android.com/tools"
            package="com.android.activity101">

            <application
                      android:allowBackup="true"
                      android:icon="@mipmap/ic_launcher"
                      android:label="@string/app_name"
                      android:supportsRtl="true"
                      android:theme="@android:style/Theme.NoTitleBar">
                  
                      <activity android:name="MainActivity">
                                     <intent-filter>
                                                <action android:name="android.intent.action.MAIN" />
                                                <category android:name="android.intent.category.LAUNCHER" />
                                     </inrtent-filter>
                      <activity>
            <application>
</mainfest>

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