一、啟動頁面布局文件

<?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"
    android:background="#ffffff">

    <ImageView
        android:id="@+id/atguigu_logo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/atguigu_logo"
        android:layout_centerHorizontal="true"
        android:layout_centerInParent
 
="true"/>

</RelativeLayout>

二、啟動頁面代碼

public class WelcomeActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_welcome);

        new Handler().postDelayed(new
 
 Runnable() {
            @Override
            public void run() {
                startActivity(new Intent(WelcomeActivity.this, MainActivity.class));
                finish();
            }
        }, 2000);
    }
}

App啟動頁面