从/res/raw中的文本文件填充android片段中的文本视图 [英] populating a text view in an android Fragment from a text file in /res/raw

问题描述

我正在尝试在android片段中填充textview.我根本没有运气，因为片段是空白的.

I am attempting to populate an textview in an android fragment. I am having no luck at all as the fragment is blank.

我知道我从根本上错过了一些东西.我已经阅读了有关碎片的文档，但我仍然感到困惑.

I know I am fundamentally missing something. I have read the docs on fragments and I am still confused.

以下是我对其中一个片段的代码(其他片段看起来相同):

Below is my code for one of the fragments (the others look the same):

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

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class ResourcesFragment extends Fragment {


    public ResourcesFragment(){

    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {


        View rootView = inflater.inflate(R.layout.fragment_resources, container, false);

        InputStream is = getResources().openRawResource(R.raw.resources);
        BufferedReader br = new BufferedReader(new InputStreamReader(is));
        String line;
        String entireFile = "";
        try {
            while((line = br.readLine()) != null) { // <--------- place readLine() inside loop
                entireFile += (line + "\n"); // <---------- add each line to entireFile

            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        TextView text = null;
        //text.setText(entireFile); // <------- assign entireFile to TextView
        //assert text != null;
        if (text != null) {
            text.setText(entireFile);
        }

        //return rootView;
        return rootView;

    }

}

这是我的XML:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/txtsource"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="16dp"
        android:layout_centerInParent="true"
        android:gravity="fill_horizontal|top|left" />

</RelativeLayout>

应用程序编译没有错误**，但是视图为空白.有人可以告诉我正确的方法来做到这一点，不仅可以帮助我了解我出了错的地方，而且可以从程序上正确地做到这一点吗?

the application compiles with no errors**, but the view is blank. Can some one show me the correct way to do this and help me understand not only where I went wrong, but proceduraly, how to do it right??

谢谢.

推荐答案

这是您代码中的错误.因为您忘记了对 TextView 的引用所以添加

here is a bug in your Code. cuz you have forgotten the reference to TextView so add

TextView文本=(TextView)rootView.findViewById(R.id.txtSource); 然后 text.setText(您的文本！");

希望为您工作:)

这篇关于从/res/raw中的文本文件填充android片段中的文本视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！