当我按我的设备对话框的alertDialog时，我的游戏有一个backkey。如果我按“退出”，则我的游戏关闭；如果我按“Cancle”，则吐司出现3秒钟； 3秒钟后，我的游戏再次开始。
现在的问题是，当我第一次按我的设备的backkey时，出现对话框，并且我执行了一些功能，其工作正常，但是如果我再次按backkey而没有“Cancle”或“Quit”游戏，那么我的游戏将不会继续，直到我按“否”按钮。
我想要的是，如果我按backkey然后出现对话框，并且如果我再次按backkey，我的游戏又恢复了，而没有再次显示对话框。
这是我的警报对话框代码:
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
// GamePanel.thread.setStoped(true);
GamePanel.thread.setRunning(false);
// in the next line of code we also style the dialog through xml which i put in styles
AlertDialog alertDialog = new AlertDialog.Builder(this,R.style.myBackgroundStyle).create();
alertDialog.setTitle("Exit Alert");
alertDialog.setMessage("Do you really want to exit the Game?");
alertDialog.setButton("Quit", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
//Best way is firstly use finish() and after that use System.exit(0) to clear static variables. It will give you some free space.
// A lot of applications leave working processes and variables what makes me angry. After 30 minutes of using memory is full and i have to run Task Manager - Lvl 2 clear memory
finish();
System.exit(0);
return;
}
});
alertDialog.setButton2("Cancle", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// dialog.cancel();
// GamePanel.thread.resume();
dialog.dismiss();
// When user press the "Cancle" button then game resume for 3 seconds then start again
// Here is the Code of the toasts and each toast appear with delay of one second.
toast = new Toast(Game.this);
TextView textView=new TextView(Game.this);
textView.setTextColor(Color.DKGRAY);
textView.setBackgroundColor(Color.TRANSPARENT);
textView.setTextSize(60);
textView.setText("READY!");
toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
toast.setView(textView);
toast.show();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
// show toast 2.
toast = new Toast(Game.this);
TextView textView = new TextView(Game.this);
textView.setTextColor(Color.DKGRAY);
textView.setBackgroundColor(Color.TRANSPARENT);
textView.setTextSize(140);
textView.setText("3");
// textView.setText("done!");
toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
toast.setView(textView);
toast.show();
}
}, 2500);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
// show toast 2.
toast = new Toast(Game.this);
TextView textView = new TextView(Game.this);
textView.setTextColor(Color.DKGRAY);
textView.setBackgroundColor(Color.TRANSPARENT);
textView.setTextSize(140);
textView.setText("2");
toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
toast.setView(textView);
toast.show();
}
}, 5000);
new Handler().postDelayed(new Runnable() {
@Override public void run() {
toast = new Toast(Game.this);
TextView textView=new TextView(Game.this);
textView.setTextColor(Color.DKGRAY);
textView.setBackgroundColor(Color.TRANSPARENT);
textView.setTextSize(140);
textView.setText("1");
toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
toast.setView(textView);
toast.show();
}
}, 7500);
new Handler().postDelayed(new Runnable() {
@Override
public void run()
GamePanel.thread.setRunning(true);
}
}, 10000);
return;
}
}
);
alertDialog.show();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
最佳答案
您需要在对话框中设置一个OnKeyListener并检查是否按下了返回键。
这是一个适合您的示例代码，您需要按以下方式修改代码:
AlertDialog alertDialog = new AlertDialog.Builder(this,R.style.myBackgroundStyle).create();
alertDialog.setTitle("Exit Alert");
alertDialog.setMessage("Do you really want to exit the Game?");
alertDialog.setButton("Quit", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
//Best way is firstly use finish() and after that use System.exit(0) to clear static variables. It will give you some free space.
// A lot of applications leave working processes and variables what makes me angry. After 30 minutes of using memory is full and i have to run Task Manager - Lvl 2 clear memory
finish();
System.exit(0);
return;
}
});
//New part regarding the back key when only dialog is shown.
alertDialog.setOnKeyListener(new Dialog.OnKeyListener() {
@Override
public boolean onKey(DialogInterface arg0, int keyCode,
KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
alertDialog.dismiss();
}
return true;
}
});
这仅在显示对话框时有效，因此，您将能够返回到自己的 Activity
关于java - BackKey上的对话框已按下，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/31681695/