android 开发 之欢迎页面

 基本功能:

   显示欢迎页面3秒后跳转到主activity

public class Welcome extends Activity{    private final int SPLASH_DISPLAY_LENGHT = 3000; //延迟三秒          @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_welcome);         new Handler().postDelayed(new Runnable(){            @Override          public void run() {              Intent mainIntent = new Intent(Welcome.this,Choose.class);              Welcome.this.startActivity(mainIntent);                  Welcome.this.finish();          }                     }, SPLASH_DISPLAY_LENGHT);     } }