Problems To Cancel A CountDownTimer Android Java

问题:

When I close my app by pressing the BACK button (onBackPressed() called), the CountDownTimer doesn't stop, until it is done with counting. How can I put the CountDownTimer cancel(); in my onBackPressed()?

Because, when I quit my application (shown below with descriptions) I don't want counter toasts on my screen anymore.

On top of my code:

boolean network_connected = false; 

What's in my onCreate():

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() method

@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     } } 

Thanks.

回答1:

Create a global object of CountDownTimer eg.

On top of the main_activity class set: CountDownTimer timer; after that do the things below.

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 } 

and on onBackPressed call timer.cancel(); like

@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(); } 

文章来源: Problems To Cancel A CountDownTimer Android Java