Question

I am currently trying to paste current time into a file for an Android application. The code looks like this but the file is not created. I have enabled the permission of my application to write on the SD card through the manifest. Any ideas?

    Time today = new Time(Time.getCurrentTimezone());
    today.setToNow();
    try {
        File myFile = new File("/sdcard/mysdfile.txt");
        myFile.createNewFile();
        FileOutputStream fOut = new FileOutputStream(myFile);
        OutputStreamWriter myOutWriter = 
                                new OutputStreamWriter(fOut);
        SimpleDateFormat dF = new SimpleDateFormat("HHMMSS");
        StringBuilder current = new StringBuilder(dF.format(today));
        myOutWriter.append(current);
        myOutWriter.close();
        fOut.close();

    }

Answer 1

You should use Environment.getExternalStorageDirectory() instead of hard-coding the /sdcard/ path.

File file = new File(Environment.getExternalStorageDirectory(), "mysdfile.txt");

I’ve tried running your code and it crashes due to dF.format(today).

Instead of having this,

 Time today = new Time(Time.getCurrentTimezone());
 today.setToNow();

It works well with this

Date today = new Date();

This code works on my device.

Date today = new Date();

try {
    File myFile = new File(Environment.getExternalStorageDirectory(), "mysdfile.txt");            
    myFile.createNewFile();

    FileOutputStream fOut = new FileOutputStream(myFile);
    OutputStreamWriter myOutWriter = new OutputStreamWriter(fOut);
    SimpleDateFormat dF = new SimpleDateFormat("HHMMSS");
    StringBuilder current = new StringBuilder(dF.format(today));
    myOutWriter.append(current);
    myOutWriter.close();
    fOut.close();
} catch (IOException e) {
    e.printStackTrace();
}