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相信大家都见过那种倒计时跳转了，但是特殊的时候要实现窗口悬浮于页面之上。 public class MyService extends Service { private static final String TAG = "MyService"; //要引用的布局文件. LinearLayout toucherLayout; //布局参数. WindowManager.LayoutParams params; //实例化的WindowManager.

CountDownTimer实现倒计时操作 public class MainActivity extends AppCompatActivity { private static final String TAG = "MainActivity"; LinearLayout ll_main; TextView tv_count; MainActivity mActivity; @Override protected void onCreate(Bundl