Appending data to a text file in Android

Question

I am trying to add data to a text file in android using the code below but it only overwrites the data with one line of data.

private void copyImageToMemory(File outFile , Float number) {
    try {

        BufferedOutputStream fos = new BufferedOutputStream(
                new FileOutputStream(outFile));


        PrintWriter pw = new PrintWriter(new BufferedWriter(
                new OutputStreamWriter(fos)));

        pw.append("result"+number);
        pw.close();
        maxSpeed=0;

    } catch (FileNotFoundException e) {
        Log.e(TAGFile, "FileNotFoundException");
    }
}

Possible duplicate of [Android append text file](http://stackoverflow.com/questions/4542318/android-append-text-file) — T. Neidhart, Jun 19 '16 at 20:06

score 4 · Accepted Answer · answered Jun 19 '16 at 20:35

4

The FileOutputStream constructor allows to specify whether it should append to an already existing file or not:

new FileOutputStream(file, true);

will create a stream that appends to the given file.

answered Jun 19 '16 at 20:35

T. Neidhart

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Appending data to a text file in Android

1 Answers1