单击按钮时如何打开对话框? [英] How to open a dialog when I click a button?

问题描述

我有一个按钮，按下后想打开一个对话框.这是我的代码:

I have a button and I would like to open a dialog when pressed. This is my code:

Button more = (Button) findViewById(R.id.more);
more.setOnClickListener(new View.OnClickListener() {
    public void onClick(View view) {
        //Intent myIntent = new Intent(view.getContext(), agones.class);
        //startActivityForResult(myIntent, 0);

        AlertDialog alertDialog = new AlertDialog.Builder(this).create();
        alertDialog.setTitle("hi");
        alertDialog.setMessage("this is my app");

        alertDialog.setButton("Continue..", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            // here you can add functions
        }
        });
    }
});

推荐答案

正如@Roflcoptr所说，您尚未调用 alertDialog.show()方法.因此您的对话框不会出现.

As @Roflcoptr has said, you haven't called alertDialog.show() method. thus your dialog doesn't appear.

这是您编辑的代码:

Button more = (Button) findViewById(R.id.more);
more.setOnClickListener(new View.OnClickListener() {
    public void onClick(View view) {
        //Intent myIntent = new Intent(view.getContext(), agones.class);
        //startActivityForResult(myIntent, 0);


        AlertDialog alertDialog = new AlertDialog.Builder(<YourActivityName>this).create(); //Read Update
        alertDialog.setTitle("hi");
        alertDialog.setMessage("this is my app");

        alertDialog.setButton("Continue..", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int which) {
              // here you can add functions
           }
        });

        alertDialog.show();  //<-- See This!
    }

});

如果您写的是 this 而不是< ActivityName> .this ，则它将引用 View.OnClickListener ，因为当前正在其中访问 this .您需要在此处输入活动"的名称.

if you write this instead of <ActivityName>.this, then it is going to take the reference of View.OnClickListener since this is currently being accessed inside it. You need to give your Activity's name there.

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