android 设置AlertDialog 宽度高度 失效问题

1.1下面代码是设置无效

    public void showDialog(Context context, String msg) {

        DisplayMetrics dm = getResources().getDisplayMetrics();
        int width = dm.widthPixels;
        if (context == null) {
            return;
        }
        View view = LayoutInflater.from(context).inflate(R.layout.layout_dialog, null);
        TextView tvMsg = view.findViewById(R.id.tvMsg);
        tvMsg.setText(msg);
        AlertDialog.Builder builder = new AlertDialog.Builder(context);

        builder.setTitle("提示")
           .setView(view)
                .setCancelable(false)
        ;
        alertDialog = builder.create();
        alertDialog.setCanceledOnTouchOutside(false);

        android.view.WindowManager.LayoutParams params = alertDialog.getWindow().getAttributes();
        Log.d("Tag","width---->"+width);
        int width2= (int) (width * 0.5);
        Log.d("Tag","width2---->"+width2);
        params.width = (int) (width*0.8);
        params.height =(int) (width*0.65);;

        // dialog.getWindow().setAttributes(params);
        alertDialog.getWindow().setAttributes(params);
        alertDialog.show();
    }

效果如下

图片.png

---

1.2下面是设置生效的代码

   public void showDialog(Context context, String msg) {

       DisplayMetrics dm = getResources().getDisplayMetrics();
       int width = dm.widthPixels;
       if (context == null) {
           return;
       }
       View view = LayoutInflater.from(context).inflate(R.layout.layout_dialog, null);
       TextView tvMsg = view.findViewById(R.id.tvMsg);
       tvMsg.setText(msg);
       AlertDialog.Builder builder = new AlertDialog.Builder(context);

       builder.setTitle("提示")
          .setView(view)
               .setCancelable(false)
       ;
       alertDialog = builder.create();
       alertDialog.setCanceledOnTouchOutside(false);
       alertDialog.show();

       android.view.WindowManager.LayoutParams params = alertDialog.getWindow().getAttributes();
       Log.d("Tag","width---->"+width);
       int width2= (int) (width * 0.5);
       Log.d("Tag","width2---->"+width2);
       params.width = (int) (width*0.8);
       params.height =(int) (width*0.65);;

       // dialog.getWindow().setAttributes(params);
       alertDialog.getWindow().setAttributes(params);
   }

效果如下：

图片.png

---

总结，先 alertDialog.show(); 然后 alertDialog.getWindow().setAttributes(params);就设置了宽度和高度，顺序错了，就设置失效了