Example analysis of file operation and logging operation on Android SD card
- 2021-01-02 21:59:32
- OfStack
This article illustrates the method of file operation and logging operation on Android SD card. To share for your reference, the details are as follows:
// SD Whether the card exists
private boolean checkSDCardStatus() {
boolean SDCardStatus = false;
String sDStateString = android.os.Environment.getExternalStorageState();
if (sDStateString.equals(android.os.Environment.MEDIA_MOUNTED)) {
SDCardStatus = true;
} else {
// SD Card is not available
}
return SDCardStatus;
}
// SD Is it on the card APK file
private boolean checkFileExist(String iFilePath) {
boolean fileExist = false;
if (checkSDCardStatus()) {
File myFile = new File(iFilePath);
if (myFile.exists()) {
fileExist = true;
}
}
return fileExist;
}
// Delete the file
private void deleteApk(String iFilePath) {
if (checkSDCardStatus()) {
File myFile = new File(iFilePath);
if (myFile.exists()) {
myFile.delete();
}
}
}
// in SD Card with txt record
public static void logOnFile(String format, Object... args){
String logstr = String.format(format, args);
SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String date = sDateFormat.format(new java.util.Date());
logstr = "/r/n-------------------------/r/n" + date + "/r/n" + logstr;
FileOutputStream fout;
DataOutputStream dataout;
try {
fout = new FileOutputStream("//sdcard//log.txt",true);
dataout = new DataOutputStream(fout);
dataout.writeUTF(logstr);
dataout.flush();
dataout.close();
fout.flush();
fout.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
I hope this article has been helpful in Android programming.