如何在 Android 中阅读文本文件？

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最佳答案

试试这个:

我猜你的文本文件在 SD 卡上

    //Find the directory for the SD Card using the API
//*Don't* hardcode "/sdcard"
File sdcard = Environment.getExternalStorageDirectory();


//Get the text file
File file = new File(sdcard,"file.txt");


//Read text from file
StringBuilder text = new StringBuilder();


try {
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) {
//You'll need to add proper error handling here
}


//Find the view by its id
TextView tv = (TextView)findViewById(R.id.text_view);


//Set the text
tv.setText(text.toString());

以下连结亦可帮助你:

如何在 Android 中从 SD 卡读取文本文件？

如何在 Android 中读取文本文件？

Android 读取文本原始资源文件

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把你的文本文件在资产文件夹... 并读取文件形式的文件夹..。

见下面的参考链接..。

Http://www.technotalkative.com/android-read-file-from-assets/

Http://sree.cc/google/reading-text-file-from-assets-folder-in-android

读取一个简单的文本文件

希望能帮上忙。

小开

如果您想从 sd 卡中读取文件，那么下面的代码可能对您有帮助。

 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);
Log.i("Test", "text : "+text+" : end");
text.append('\n');
} }
catch (IOException e) {
e.printStackTrace();


}
finally{
br.close();
}
TextView tv = (TextView)findViewById(R.id.amount);


tv.setText(text.toString()); ////Set the text to text view.
}


}

如果你想从资产文件夹中读取文件，然后

AssetManager am = context.getAssets();
InputStream is = am.open("test.txt");

或者，如果你想从 res/raw文件夹中读取这个文件，这个文件将被索引，并且可以通过 R 文件中的 id 来访问:

InputStream is = getResources().openRawResource(R.raw.test);

从 res/raw 文件夹读取文本文件的好例子

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首先，将文本文件存储在原始文件夹中。

private void loadWords() throws IOException {
Log.d(TAG, "Loading words...");
final Resources resources = mHelperContext.getResources();
InputStream inputStream = resources.openRawResource(R.raw.definitions);
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));


try {
String line;
while ((line = reader.readLine()) != null) {
String[] strings = TextUtils.split(line, "-");
if (strings.length < 2)
continue;
long id = addWord(strings[0].trim(), strings[1].trim());
if (id < 0) {
Log.e(TAG, "unable to add word: " + strings[0].trim());
}
}
} finally {
reader.close();
}
Log.d(TAG, "DONE loading words.");
}

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试试这个

try {
reader = new BufferedReader(new InputStreamReader(in,"UTF-8"));
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String line="";
String s ="";
try
{
line = reader.readLine();
}
catch (IOException e)
{
e.printStackTrace();
}
while (line != null)
{
s = s + line;
s =s+"\n";
try
{
line = reader.readLine();
}
catch (IOException e)
{
e.printStackTrace();
}
}
tv.setText(""+s);
}

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试试这个代码

public static String pathRoot = "/sdcard/system/temp/";
public static String readFromFile(Context contect, String nameFile) {
String aBuffer = "";
try {
File myFile = new File(pathRoot + nameFile);
FileInputStream fIn = new FileInputStream(myFile);
BufferedReader myReader = new BufferedReader(new InputStreamReader(fIn));
String aDataRow = "";
while ((aDataRow = myReader.readLine()) != null) {
aBuffer += aDataRow;
}
myReader.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return aBuffer;
}

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小文本文件的最短格式(Kotlin) :

val reader = FileReader(path)
val txt = reader.readText()
reader.close()