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POSerializing objects into files in android
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copied!<p>Write now I have this class that I would like to be able to save and open using serialization: </p> <pre><code>public class Region implements Serializable { private final int inputNumberOfColumnsAlongXAxis; private final int inputNumberOfColumnsAlongYAxis; private double inputDataScaleReductionOnXAxis; private double inputDataScaleReductionOnYAxis; private int numberOfColumnsAlongXAxis; private int numberOfColumnsAlongYAxis; private int cellsPerColumn; // Z-Axis dimension private float inhibitionRadius; private final float percentMinimumOverlapScore; private final float minimumOverlapScore; // ---------------------------------------------------------- /** * Save the current Region object on the view into a file named * "TrainedRegion". */ public static byte[] serializeObject(Object region) { // TODO: save with current timestamp and use open pop-up // String timeStamp = "" + System.currentTimeMillis() / 1000; // String fileName = ("Region created at timestamp(seconds): " + // timeStamp); ByteArrayOutputStream baos = new ByteArrayOutputStream(); try { ObjectOutput objectOutput = new ObjectOutputStream(baos); objectOutput.writeObject(region); objectOutput.close(); // Get the bytes of the serialized object byte[] bytesOfSerializedObject = baos.toByteArray(); return bytesOfSerializedObject; } catch(IOException ioe) { Log.e("serializeObject", "error", ioe); return null; } } // ---------------------------------------------------------- /** * Returns a previously saved Region object with the given name. * * @param fileName * @return A previously saved Region object. */ public static Object deserializeObject(byte[] bytes) { // TODO: later read Region object saved in file named by the time stamp during // saving. // ObjectInputStream inputStream = new ObjectInputStream(new // FileInputStream(fileName)); try { ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bytes)); Object object = in.readObject(); in.close(); return object; } catch(ClassNotFoundException cnfe) { Log.e("deserializeObject", "class not found error", cnfe); return null; } catch(IOException ioe) { Log.e("deserializeObject", "io error", ioe); return null; } } } </code></pre> <p>The following is in my "screen" class that acts as the controller for my model above and my view(the screen): </p> <pre><code>// ---------------------------------------------------------- /** * I want to be able to open a Region instance that was saved. */ public void openClicked() { // open the file created below in save method and write all the bytes into // the global region instance for this class. How can do this? this.region = (Region) this.region.deserializeObject(savedRegionInBytes); } // ---------------------------------------------------------- /** * */ public void saveClicked() { this.savedRegionInBytes = this.region.serializeObject(this.region); // TODO: write savedRegionInBytes to a file. How can I do this? } </code></pre> <p>Also if there is a easier way to serialize objects into files in android I would love to hear it. Thanks!</p>

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