如何在Android中读取文本文件？
如何在Android中读取文本文件？
提问于 2012-09-14 17:35:10
我想从文本文件中读取文本。在下面的代码中，发生了一个异常(这意味着它转到了catch块)。我将文本文件放在应用程序文件夹中。我应该将这个文本文件(mani.txt)放在哪里才能正确读取它？
try
{
InputStream instream = openFileInput("E:\\test\\src\\com\\test\\mani.txt");
if (instream != null)
{
InputStreamReader inputreader = new InputStreamReader(instream);
BufferedReader buffreader = new BufferedReader(inputreader);
String line,line1 = "";
try
{
while ((line = buffreader.readLine()) != null)
line1+=line;
}catch (Exception e)
{
e.printStackTrace();
}
}
}
catch (Exception e)
{
String error="";
error=e.getMessage();
}回答 6
Stack Overflow用户
回答已采纳
发布于 2012-09-14 17:38:32
试试这个：
我假设你的文本文件在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());以下链接也可以帮助您：
How can I read a text file from the SD card in Android?
Stack Overflow用户
发布于 2012-09-14 17:48:53
如果你想从SD卡中读取文件。那么下面的代码可能会对你有所帮助。
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.
}
}如果您想从资产文件夹中读取文件，则
AssetManager am = context.getAssets();
InputStream is = am.open("test.txt");或者，如果您想要从res/raw文件夹中读取此文件，该文件将被索引，并可通过R文件中的id进行访问：
InputStream is = getResources().openRawResource(R.raw.test); Stack Overflow用户
发布于 2015-12-31 16:39:58
试试这段代码
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;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/12421814
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