弹出AlertDialog之后，点击空白处，默认Dialog消失；
点击回退键，默认消失；
那么如何点击空白处，不隐藏对话框，点击Android的返回键，跳回到上一个Activity？
直接看代码：
//*******************
public static void showAlertDialog(final Context context, String title, CharSequence[] items,
OnClickListener listener, boolean canceledOutside){
Builder builder = new AlertDialog.Builder(context).setTitle(title).setItems(items, listener);
if(canceledOutside){
builder.show();
}else{
AlertDialog dialog = builder.create();
//点击dialog之外的空白处，dialog不能消失
dialog.setCanceledOnTouchOutside(false);
dialog.setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK &&
event.getAction() == KeyEvent.ACTION_UP) {
//按back键，返回上一个Activity
dialog.cancel();
boolean isActivity = context instanceof Activity;
if(isActivity){
Activity act = (Activity)context;
act.finish();
}
return false;
}
return false;
}
});
dialog.show();
}
}dialog的dismiss 和cancel方法区别:
cancel会调用CancelListener，这是最大的区别，另外cancel会调用dismiss。
转播
