Android clicks the return key twice in a row to exit the application, prompting "exit the application once again & quot;, android twice

Android clicks the return key twice in a row to exit the application, prompting "exit application again" and android twice

// Define a long variable to determine the interval between two clicks

Private long exitTime;

 

// Click events that enable the return key

Public boolean onKeyDown (int keyCode, KeyEvent event ){

If (keyCode = KeyEvent. KEYCODE_BACK ){

Exit (); // click here to judge

Return false;

}

Return super. onKeyDown (keyCode, event );

}

 

Public void exit (){

If (System. currentTimeMillis ()-exitTime)> 2000 ){

// Prompt when the interval between clicks is greater than two seconds

Toast. makeText (context, "exit application again", Toast. LENGTH_SHORT). show ();

ExitTime = System. currentTimeMillis ();

} Else {

// Exit the application for two consecutive clicks

System. exit (0 );

}

}