Example analysis of file operation and logging operation on Android SD card

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.