如何从我的班级访问活动的用户界面？ [英] How to access Activity UI from my class?

问题描述

我有我的创建类的对象实例的活动：

I have an activity which creates an object instance of my class:

file MyActivity.java:
public class MyActivity extends Activity {
    TextView myView = (TextView)findViewById(R.id.myView);
    ...
    Points myPoints new Points();
    ...
}
--------------------------------------------------------------

file Points.java:
private class Points {
    ...
    HOW TO USE myView HERE ???
    ...
}
--------------------------------------------------------------

在我的课

我如何使用UI对象（不延伸的 活动）？我应该通过一些背景，以我的观点类？我该怎么办，到底是什么？

How do I use the UI objects in my class (which does not extend an Activity)? Should I pass some context to my Points class? How do I do, exactly?

推荐答案

看你的帖子，我已经修改它，来解决这个问题。

see you post, i've edited it , to fix the problem

希望它帮助：=）

下面是编辑：

file MyActivity.java:
    public class MyActivity extends Activity {
    TextView myView ;
    protected void onCreate(android.os.Bundle savedInstanceState) {
        myView = (TextView)findViewById(R.id.myView);
            Points myPoints = new Points(this);
            myPoints.displayMsg("Hello World !!!");
    }  
    }
    --------------------------------------------------------------

    file Points.java:
    private class Points {
        protected MyActivity context;
        //add a constructor with the Context of your activity
        public Points(MyActivity _context){
            context = _context;
        }

        public void displayMsg( final String msg){
            context.runOnUiThread(new Runnable() {

                @Override
                public void run() {
                    context.myView.setText(msg);    
                }
            });
        }
    }

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