更改TextView的内部片段 [英] Change TextView inside Fragment

问题描述

我跟着这家伙的教程如何做一个动作条。比方说，我想更改里面的片段中的一个TextView的。所以我说这对我的StartActivity.java，的onCreate下：

I followed this guy's tutorial on how to make an ActionBar. Let's say I want to change the TextView inside one of the fragments. So I added this on my StartActivity.java, under onCreate:

TextView textview = (TextView) findViewById(R.id.textView1);
textview.setText("HI!");

当我开始我的应用程序，它崩溃。有人可以点我朝着正确的方向？

When I start my app, it crashes. Can somebody point me to the right direction?

我希望有人花时间看看这个家伙的教程，因为他的布局基本上和我一样。谢谢你。

I hope somebody takes the time to look at the guy's tutorial because his layout is basically the same as mine. Thank you.

推荐答案

如果你想改变你的组成部分，我建议你作出这样的片段里面的方法：

If you want change your component, I suggest you to make a method inside the fragment like this:

    import android.os.Bundle;
    import android.support.v4.app.Fragment;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.TextView;

    public class DetailFragment extends Fragment {

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            View view = inflater.inflate(R.layout.details, container, false);
            return view;
        }


        public void setText(String text){
            TextView textView = (TextView) getView().findViewById(R.id.detailsText);
            textView.setText(text);
        }

    }

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