安卓程序怎么设置启动界面？

代码如下

public class SplashActivity extends Activity {
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		final long start = System.currentTimeMillis();
		new Thread(){
			public void run() {
				long time = System.currentTimeMillis()-start;
				if(time<2000){
					SystemClock.sleep(2000-time);
					Intent intent = new Intent(SplashActivity .this,MainActivity.class);
					startActivity(intent);
				}
			};
		}.start();
	}
}

new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                startActivity(new Intent(SplashActivity.this, MainActivity.class));
                SplashActivity.this.finish();
            }
        }, 1000);

可以这样，求采纳