public class MessageDialog {
    Context context;
    AlertDialog dialog;
    AlertDialog.Builder builder;
    private MessageDialog() {}
    private static MessageDialog messageDialog = new MessageDialog();
    public static MessageDialog getInstance() {return messageDialog;}

    OnCancelClickListener cancelClickListener
 
;
    OnCommitClickListener commitClickListener;

    public void showMessageDialog() {
        if (dialog != null && !dialog.isShowing()) {
            dialog.show();
        }
    }

    public void cancelMessageDialog() {
        if(dialog != null && dialog.isShowing()) {
            dialog
 
.cancel();
        }
    }

    public AlertDialog generateDialog() {
        if (builder == null) {
            return null;
        }
        dialog = builder.create();
        return dialog;
    }

    public void initDialog(Context context, String message) {
        this.initDialog(context, "是", "否"
 
, message);
    }
    /**
     * 初始化對話方塊
     * @param context
* @param message
*/
public void initDialog(Context context, String btnCommit, String btnCancel, String message) {
        this.context = context;
        builder = new AlertDialog.Builder(context).setMessage(message).setPositiveButton(btnCommit, new DialogInterface.OnClickListener() {
            @Override
public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                if(commitClickListener == null) {
                    return;
                }
                commitClickListener.onCommit();
            }
        }).setNegativeButton(btnCancel, new DialogInterface.OnClickListener() {
            @Override
public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                if(cancelClickListener == null) {
                    return;
                }
                cancelClickListener.onCancel();
            }
        });
    }

    public OnCancelClickListener getCancelClickListener() {
        return cancelClickListener;
    }

    public MessageDialog setCancelClickListener(OnCancelClickListener cancelClickListener) {
        this.cancelClickListener = cancelClickListener;
        return this;
    }

    public OnCommitClickListener getCommitClickListener() {
        return commitClickListener;
    }

    public MessageDialog setCommitClickListener(OnCommitClickListener commitClickListener) {
        this.commitClickListener = commitClickListener;
        return this;
    }

    public void setAlertMessage(String message) {
        builder.setMessage(message);
    }

    public interface OnCancelClickListener {
        public void onCancel();
    }

    public interface OnCommitClickListener {
        public void onCommit();
    }

}

在別的類中使用的例子

MessageDialog messageDialog = MessageDialog.getInstance();
messageDialog.initDialog(context, "是", "否", "報備成功，是否繼續？");
messageDialog.generateDialog();
messageDialog.showMessageDialog();

messageDialog.setCommitClickListener(new MessageDialog.OnCommitClickListener() {
    @Override
public void onCommit() {
        fragment.viewReset();
    }
});

messageDialog.setCancelClickListener(new MessageDialog.OnCancelClickListener() {
    @Override
public void onCancel() {
        fragment.getActivity().onBackPressed();
    }
});