android studio welcome and intro

 

This is the first time I have come to learn android, now imitate handle network welcomeactivity

activity_welcome.xml 

<resources>

<!-- Default screen margins, per the Android Design guidelines. -->
<dimen name="activity_horizontal_margin">16dp</dimen>
<dimen name="activity_vertical_margin">16dp</dimen>
<dimen name="indicator_right_padding">10dp</dimen>
<dimen name="indicator_corner_radius">12dp</dimen>
<dimen name="indicator_internal_padding">4dp</dimen>
<dimen name="header_footer_left_right_padding">24dp</dimen>
<dimen name="header_footer_top_bottom_padding">12dp</dimen>

</resources>

welcomeactivity.java

com.lzh.lashou Package; 

Import android.app.Activity; 
Import android.content.Intent; 
Import android.os.Bundle; 
Import android.os.Handler; 
Import android.os.Message; 

Import android.support.annotation.Nullable ; 

public class WelcomeActivity the extends Activity { 
    @Override 
    public void onCreate (Bundle @Nullable savedInstanceState) {// Note the new version onCreate method of removing the parameters behind the two parameters, there would be a blank page after commissioning 
        super.onCreate (savedInstanceState); 
        setContentView (R.layout.activity_welcome); 
　　　　after entering // 3s MainActivity
         new new Handler (new new Handler.Callback () { 
            @Override 
            public Boolean the handleMessage (the Message Message) {
                startActivity (the Intent new new (WelcomeActivity.this, MainActivity.class)); 
                return to true; 
            } 
        .}) sendEmptyMessageDelayed (0,3000 could); / * * Delay 3S / 

    } 

} 

All pages must be in 
registration in mainifest 

// settings from Welcome to the start page for the page 
<Activity Android: name =. "welcomeactivity" /> 
<Activity Android: name =. "MainActivity" />

 

Problems, most of that blank page appears after commissioning, the solution for heavy-duty onCreate () method while passing only the first mass participation, after an argument deleted.