几秒后自动跳转
public class MainActivity2 extends Activity implements OnClickListener { private int a = 5; private TextView text; private Handler handler = new Handler() { public void handleMessage(android.os.Message msg) { if (msg.what == 0) { if (a > 0) { a--; text.setText(a + "秒后进入主页面"); handler.sendEmptyMessageDelayed(0, 1000); } else { //如果a<0的话就跳转页面 Intent intent = new Intent(MainActivity2.this, MainActivity3.class); startActivity(intent); } } } ; }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); //找到控件 text = (TextView) findViewById(R.id.text02); //发一个延迟的空消息 handler.sendEmptyMessageDelayed(0, 1000); } }