获取SD卡上的文档的内容

InputStream inputStream = null;
try {
inputStream = new FileInputStream(Environment.getExternalStorageDirectory()+"/c360_debug.txt");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

Toast.makeText(getApplicationContext(), getStreamString(inputStream), 1).show();

/**
* 将一个输入流转化为字符串
*/
public static String getStreamString(InputStream tInputStream) {
if (tInputStream != null) {
try {
BufferedReader tBufferedReader = new BufferedReader(
new InputStreamReader(tInputStream));
StringBuffer tStringBuffer = new StringBuffer();
String sTempOneLine = new String("");
while ((sTempOneLine = tBufferedReader.readLine()) != null) {
tStringBuffer.append(sTempOneLine);
}
return tStringBuffer.toString();
} catch (Exception ex) {
ex.printStackTrace();
}
}
return null;
}