如何在 Android 的非活動類中編寫自定義警報？

Question

我必須在非活動類上編寫自定義警報，以從所有活動中顯示該警報。 我已將 inflater 用於自定義警報，但它使應用程序崩潰。 請參閱下面的代碼。請為此提出一個解決方案

  AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(context);
   LayoutInflater inflater = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE );

      //  LayoutInflater inflater = context.getLayoutInflater();
        View dialogView = inflater.inflate(R.layout.alertlayout, null);
        dialogBuilder.setView(dialogView);
        dialogBuilder.setCancelable(false);
        TextView btn_ok = dialogView.findViewById(R.id.btn_ok);
        TextView txt_dia = dialogView.findViewById(R.id.txt_dia);

        txt_dia.setText(msg);

        if(subAlertDialog != null && subAlertDialog.isShowing()) {
            return;
        }
        subAlertDialog = dialogBuilder.create();
        subAlertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY);
        subAlertDialog.show();
        btn_ok.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
            subAlertDialog.dismiss();
                return false;
            }
        });

Answer 1

試試下面的代碼，它會幫助你。

 //Call dialog from activity 
   CustomDialog.showDialog(this);

//This is your custom dialog class
public class CustomDialog {

public static void showDialog(Context context){
    AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(context);
    LayoutInflater inflater = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE );
    View dialogView = inflater.inflate(R.layout.alertlayout, null);
    dialogBuilder.setView(dialogView);
    dialogBuilder.setCancelable(false);
    TextView btn_ok = dialogView.findViewById(R.id.btn_ok);
    TextView txt_dia = dialogView.findViewById(R.id.txt_dia);

    txt_dia.setText("abc");
    btn_ok.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

        }
    });
    dialogBuilder.create().show();
}
}