当我通过按下返回按钮(调用 onBackPressed())关闭我的应用程序时,CountDownTimer
不会停止,直到完成计数。如何将 CountDownTimer
cancel(); 放入我的 onBackPressed()
中?
因为,当我退出我的应用程序时(下面显示了描述),我不想再在我的屏幕上出现柜台 toast 。
在我的代码之上:
boolean network_connected = false;
我的 onCreate()
中有什么:
if (check_network.isInternetAvailable(this)) {
network_connected = true;
new connect_task_main().execute("");
} else {
network_connected = false;
}
if (network_connected == false) {
new CountDownTimer(11000, 1000) {
public void onTick(long millisUntilFinished) {
global.toast.setText("No Internet Connection!" + "\n" + "Automatic Refresh In: " + millisUntilFinished / 1000); //set text for toast
global.toast.show(); //show toast
}
public void onFinish() {
if (network_connected == false) {
global.cancel_toast(0); //stop all toasts
finish(); //quit activity
startActivity(new Intent(main_activity.this, main_activity.class)); //start activity
} else {
}
}
}.start(); //start the countdowntimer
} else {
network_connected = true;
}
onBackPressed()
方法
@Override
public void onBackPressed() {
if (page_number > global.page_number_min) { //does not matter
page_number--; //does not matter
global.cancel_toast(0); //stop all toasts
network_connected = true;
finish();
} else {
global.cancel_toast(0);
network_connected = true;
finish(); //quit activity
super.onBackPressed(); //quit application
}
}
谢谢。
最佳答案
创建 CountDownTimer
的全局对象,例如。
在 main_activity 类集之上:CountDownTimer 计时器;
之后执行以下操作。
timer = new CountDownTimer(11000, 1000)
{
public void onTick(long millisUntilFinished)
{
global.toast.setText("No Internet Connection!" + "\n" + "Automatic Refresh In: " + millisUntilFinished / 1000); //set text for toast
global.toast.show(); //show toast
}
public void onFinish()
{
if (network_connected == false)
{
global.cancel_toast(0); //stop all toasts
finish(); //quit activity
startActivity(new Intent(main_activity.this, main_activity.class)); //start activity
}
else
{
}
}
}.start(); //start the countdowntimer
}
并在 onBackPressed
上调用 timer.cancel();
就像
@Override
public void onBackPressed()
{
if (page_number > global.page_number_min)
{ //does not matter
page_number--; //does not matter
global.cancel_toast(0); //stop all toasts
network_connected = true;
finish();
}
else
{
global.cancel_toast(0);
network_connected = true;
finish(); //quit activity
super.onBackPressed(); //quit application
}
timer.cancel();
}
关于java - Android Java 取消 CountDownTimer 的问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23630828/