Android：alertDialog 不工作

Question

我试图在单击按钮时添加警报对话框，但有些它不起作用......但我添加的吐司工作正常。有人可以帮我吗？我在创建对象时直接添加了上下文而不是“this”[ new AlertDialog.Builder(context).create(); ] 当我添加这个时，它给了我错误“构造函数 AlertDialog.Builder(new View.OnClickListener(){}) 未定义”

       public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
            View convertView, ViewGroup parent) {
        Service service = (Service) getChild(groupPosition, childPosition);
        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.child_layout, null);
        }
        TextView tv = (TextView) convertView.findViewById(R.id.tvChild);
        Drawable d = convertView.findViewById(R.id.submit).getBackground();  
        PorterDuffColorFilter filter = new PorterDuffColorFilter(Color.RED, PorterDuff.Mode.SRC_ATOP);  
        d.setColorFilter(filter); 
        tv.setText("   " + service.getName());
        this.submitButton = (Button)convertView.findViewById(R.id.submit);
        this.submitButton.setText("Activate");
        this.submitButton.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {
                Toast.makeText(context, "Service Activation Request Send", Toast.LENGTH_LONG).show();
                AlertDialog alertDialog = new AlertDialog.Builder(context).create();
                alertDialog.setTitle("Alert 1");
                alertDialog.setMessage("This is an alert");
                alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
                  public void onClick(DialogInterface dialog, int which) {
                    return;
                } }); 
                }
              });

        //this.submitButton.setPadding(20, 0, 0, 0);

        // Depending upon the child type, set the imageTextView01
        tv.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
        if (service instanceof DataService) {
            tv.setCompoundDrawablesWithIntrinsicBounds(R.drawable.data, 0, 0, 0);
        } else if (service instanceof VoiceService) {
            tv.setCompoundDrawablesWithIntrinsicBounds(R.drawable.voice, 0, 0, 0);
        } else if (service instanceof SmsService) {
            tv.setCompoundDrawablesWithIntrinsicBounds(R.drawable.sms, 0, 0, 0);
        }
        return convertView;
        }

Answer 1

调用 alertDialog 上的 show() 方法。

Answer 2

您在设置任何字段之前调用 create() 并且没有调用 show()

Android 文档指出，最好在 Activity 的 onCreateDialog(int) 回调方法中定义对话框的创建

http://developer.android.com/guide/topics/ui/dialogs.html

你可以这样做，然后显示你的对话框通过使用相关 ID 调用 showDialog(int) 来实现按钮 onClickListener