如果需要首页面倒计时跳转 直接将下面代码复制到工程中, package com.example.a1.zhaoshan20170619; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.os.CountDownTimer; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.widget.TextView; //首页实现三秒跳转,第二次进入直接跳过首页面 public class MainActivity extends AppCompatActivity { private TextView timerView; private int time = 3; private Handler handler =new Handler(){ @Override public void handleMessage(Message msg) { switch (msg.what) { case 0: //time--; //timerView.setText("还有"+ time+"秒跳转"); Intent intent = new Intent(MainActivity.this,SecondActivity.class); startActivity(intent); break; default: break; } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //实例化一个sp对象 SharedPreferences sp = getSharedPreferences("USER",MODE_PRIVATE); //得到一个编辑器 SharedPreferences.Editor edit = sp.edit(); //得到一个bool值 boolean first = sp.getBoolean("first", true); if (first){ //如果是第一次就给他put一个值 改变状态为false edit.putBoolean("first",false); edit.commit(); initview();//初始化数据 handler.sendEmptyMessageDelayed(0,3000); }else { //直接跳转 Intent intent = new Intent(MainActivity.this,SecondActivity.class); startActivity(intent); } } private void initview() { timerView = (TextView) findViewById(R.id.textView); //实例化一个MyCount: MyCount myCount = new MyCount(3000,1000); // 开始倒计时: myCount.start(); } //创建一个类继承CountDownTimer /** * Rewrite 'CountDownTimer' method. * * @param millisInFuture * 倒计时总数,单位为毫秒。 * @param countDownInterval * 每隔多久调用onTick一次 * @author DaiZhenWei * */ public class MyCount extends CountDownTimer { public MyCount(long millisInFuture, long countDownInterval) { super(millisInFuture, countDownInterval); } @Override public void onFinish() { timerView.setText(""); } @Override public void onTick(long millisUntilFinished) { timerView.setText("请等待60秒(" + millisUntilFinished / 1000 + ")..."); } } }
App进入首页三秒后跳转到主页面,第二次进入直接跳到主页面,带倒计时
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转载自blog.csdn.net/qq_40857831/article/details/80350106
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