如何在 Android 的非活动类中编写自定义警报？

Posted 2023-05-07

【中文标题】如何在 Android 的非活动类中编写自定义警报？

【英文标题】：How to write a Custom Alert inside a Non activity class in Android?

【发布时间】：2021-09-10 09:49:37

【问题描述】：

我必须在非活动类上编写一个自定义警报，以从所有活动中显示这一点。 我已将充气机用于自定义警报，但它会使应用程序崩溃。请参阅下面的代码。请为此提出解决方案

  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;
            
        );

【参考方案1】：

试试下面的代码，它会对你有所帮助。

 //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();