new Handler().postDelayed() 延迟intent跳转

new Handler().postDelayed(new Runnable(){
@Override
public void run(){
Intent intent = new Intent (LoadingActivity.this,Whatsnew.class);
startActivity(intent);
LoadingActivity.this.finish();
Toast.makeText(getApplicationContext(), "登录成功", Toast.LENGTH_SHORT).show();
}
}, 200);