如何在Android中读取文本文件？
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How to read text file in Android?
提问by sunny
I am saving details in out.txt file which has created a text file in data/data/new.android/files/out.txt. I am able to append information to the text, however, I am unable to read this file. I used the following procedures to read the file :
我将详细信息保存在 out.txt 文件中，该文件已在 data/data/new.android/files/out.txt 中创建了一个文本文件。我能够将信息附加到文本中，但是，我无法读取此文件。我使用以下程序读取文件：
File file = new File( activity.getDir("data", Context.MODE_WORLD_READABLE), "new/android/out.txt");
BufferedReader br = new BufferedReader(new FileReader(file));
Can anyone please help me out to fix this issue ?
任何人都可以帮我解决这个问题吗？
Regards, Sunny.
问候，阳光。
回答by user1135469
@hermy's answer uses dataIO.readLine(), which has now deprecated, so alternate solutions to this problem can be found at How can I read a text file in Android?. I personally used @SandipArmalPatil's answer...did exactly as needed.
@hermy 的回答使用dataIO.readLine()，现在已弃用，因此可以在如何在 Android 中读取文本文件中找到此问题的替代解决方案？. 我个人使用了@SandipArmalPatil 的回答……完全按照需要去做。
StringBuilder text = new StringBuilder();
try {
File sdcard = Environment.getExternalStorageDirectory();
File file = new File(sdcard,"testFile.txt");
BufferedReader br = new BufferedReader(new FileReader(file));
String line;
while ((line = br.readLine()) != null) {
text.append(line);
text.append('\n');
}
br.close() ;
}catch (IOException e) {
e.printStackTrace();
}
TextView tv = (TextView)findViewById(R.id.amount);
tv.setText(text.toString()); ////Set the text to text view.
回答by hermy
You can read a line at a time with this:
您可以一次阅读一行：
FileInputStream fis;
final StringBuffer storedString = new StringBuffer();
try {
fis = openFileInput("out.txt");
DataInputStream dataIO = new DataInputStream(fis);
String strLine = null;
if ((strLine = dataIO.readLine()) != null) {
storedString.append(strLine);
}
dataIO.close();
fis.close();
}
catch (Exception e) {
}
Change the if to while to read it all.
将 if 更改为 while 以阅读所有内容。
回答by user2964202
Just put your file (ie. named yourfile) inside the res/raw folder (you can create if if doesn't exist) inside your project. The R.raw.yourfile resource will be automatically generated by the sdk. To obtain a String of the text file, just use the code suggested by Vovodroid in the following post: Android read text raw resource file
只需将您的文件（即命名为 yourfile）放在项目中的 res/raw 文件夹中（如果不存在，您可以创建）。R.raw.yourfile 资源将由 sdk 自动生成。要获取文本文件的字符串，只需使用以下帖子中 Vovodroid 建议的代码： Android 读取文本原始资源文件
String result;
try {
Resources res = getResources();
InputStream in_s = res.openRawResource(R.raw.yourfile);
byte[] b = new byte[in_s.available()];
in_s.read(b);
result = new String(b);
} catch (Exception e) {
// e.printStackTrace();
result = "Error: can't show file.";
}
