Detailed explanation of Android program exit and false exit background running

Public void onBackPressed (){
AlertDialog. Builder builder = new Builder (LawdaquanActivity. this );
Builder. setIcon (R. drawable. imagebutton5 );
Builder. setTitle ("prompt ");
Builder. setMessage ("Do you really want to exit the legal information software? ");
Builder. setPositiveButton ("yes ",
New android. content. DialogInterface. OnClickListener (){
@ Override
Public void onClick (DialogInterface dialog, int which ){
Intent I = new Intent (Intent. ACTION_MAIN );

I. setFlags (Intent. FLAG_ACTIVITY_NEW_TASK );

I. addCategory (Intent. CATEGORY_HOME );

StartActivity (I );

}
});
Builder. setNegativeButton ("no ",
New android. content. DialogInterface. OnClickListener (){
@ Override
Public void onClick (DialogInterface dialog, int which ){
Dialog. dismiss ();
}
});
Builder. create (). show ();

}

 

------------- Quit
Exit application implementation: you can write a method by yourself, for example:

Public void exitProgrames {

Intent startMain = new Intent (Intent. ACTION_MAIN );

StartMain. addCategory (Intent. CATEGORY_HOME );

StartMain. setFlags (Intent. FLAG_ACTIVITY_NEW_TASK );

StartActivity (startMain );

Android. OS. Process. killProcess (android. OS. Process. myPid ());

 

-------------- Rewrite ONKEYDOWN
Public boolean onKeyDown (int keyCode, KeyEvent event ){

If (keyCode = KeyEvent. KEYCODE_BACK ){
New AlertDialog. Builder (this)
. SetIcon (R. drawable. title)
. SetTitle ("Exit software ")
. SetMessage ("withdraw from legal instruments software ")
. SetPositiveButton ("no ",
New DialogInterface. OnClickListener (){

@ Override
Public void onClick (DialogInterface dialog,
Int which ){
// TODO Auto-generated method stub

}
}). SetNegativeButton ("exit", new OnClickListener (){

@ Override
Public void onClick (DialogInterface dialog, int which ){
// TODO Auto-generated method stub
Finish ();
}
}). Create (). show ();
}

Else {
Return super. onKeyDown (keyCode, event );

}

// TODO Auto-generated method stub
Return super. onKeyDown (keyCode, event );
}

----------- False logout
Intent I = new Intent (Intent. ACTION_MAIN );

I. setFlags (Intent. FLAG_ACTIVITY_NEW_TASK );

I. addCategory (Intent. CATEGORY_HOME );

StartActivity (I );
Finish ();

 

 

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