Example usage for java.lang.ref WeakReference WeakReference

Introduction

In this page you can find the example usage for java.lang.ref WeakReference WeakReference.

Prototype

public WeakReference(T referent)

Source Link

Document

Creates a new weak reference that refers to the given object.

Usage

From source file:Main.java

public static synchronized Thread createTrackThread(Runnable run) {
    Thread t = new Thread(run);
    threadList.add(new WeakReference<>(t));
    return t;/*from   ww w  .  j a v  a  2  s .  com*/
}

From source file:Main.java

public static void add(Activity acitivity) {
    activitys.add(new WeakReference(acitivity));
}

From source file:Main.java

public static void setContext(Context c, Activity a) {
    context = c;
    activity = new WeakReference<Activity>(a);
}

From source file:Main.java

public static WeakReference<Bitmap> rotateBitmap(WeakReference<Bitmap> bitmap, int degress) {
    if (bitmap == null || bitmap.get() == null)
        return null;
    Matrix m = new Matrix();
    m.postRotate(degress);//from w w  w .j  av a 2  s . c  om
    return new WeakReference<Bitmap>(Bitmap.createBitmap(bitmap.get(), 0, 0, bitmap.get().getWidth(),
            bitmap.get().getHeight(), m, true));
}

From source file:Main.java

/**
 * Questo metodo statico serve per tracciare un ExecutorService  per la chiusura
 * @param exs ExecutorService da tracciare
 * @return l'ExecutorService tracciato/*from ww  w .j a v a2  s.  c  o  m*/
 */
public synchronized static ExecutorService TrackExecutorService(ExecutorService exs) {
    executorList.add(new WeakReference<ExecutorService>(exs));
    return exs;
}

From source file:Main.java

private static WeakReference<Bitmap> cprsBmpBySize(String path, int rqsW, int rqsH) {
    if (TextUtils.isEmpty(path))
        return null;
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;// w w  w. j  a  v a2s . c  o  m
    BitmapFactory.decodeFile(path, options);
    options.inSampleSize = caculateInSampleSize(options, rqsW, rqsH);
    options.inJustDecodeBounds = false;
    return new WeakReference<Bitmap>(BitmapFactory.decodeFile(path, options));
}

From source file:Main.java

public static BufferedImage getUIImage(Class c, String name) {

    try {//  w w w  .j  a  v a 2s  .  c  o  m
        String id = c + " - " + name;
        WeakReference wr = (WeakReference) UIImagesReferences.get(id);

        if (wr != null) {
            BufferedImage img = (BufferedImage) wr.get();
            if (img != null) {
                return img;
            }
        }
        BufferedImage img = ImageIO.read(c.getResource(name));

        UIImagesReferences.put(id, new WeakReference(img));

        return img;
    } catch (Exception e) {
        throw new RuntimeException("error loading " + c + " " + name, e);
    }

}

From source file:Main.java

/**
 * Execute an {@link AsyncTask} on a thread pool
 *
 * @param <T> Task argument type//from  w ww.ja v  a  2 s.  com
 * @param forceSerial True to force the task to run in serial order
 * @param task Task to execute
 * @param args Optional arguments to pass to
 *            {@link AsyncTask#execute(Object[])}
 */
@SuppressLint("NewApi")
public static <T> WeakReference<AsyncTask<T, ?, ?>> execute(final boolean forceSerial,
        final AsyncTask<T, ?, ?> task, final T... args) {
    final WeakReference<AsyncTask<T, ?, ?>> taskReference = new WeakReference<AsyncTask<T, ?, ?>>(task);
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.DONUT) {
        throw new UnsupportedOperationException("This class can only be used on API 4 and newer.");
    }

    try {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB || forceSerial) {
            taskReference.get().execute(args);
        } else {
            taskReference.get().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, args);

        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return taskReference;
}

From source file:Main.java

static public boolean isHardwareAccelerated(Canvas canvas) {
    // Return cached value, faster than use reflection
    if (sLastCanvas != null && sLastCanvas.get() == canvas) {
        return sLastCanvasIsHardwareAccelerated;
    }/*from  ww w  .ja v  a 2s  .  c  o  m*/

    sLastCanvasIsHardwareAccelerated = false;
    if (methodIsHardwareAccelerated != null) {
        try {
            Object result = methodIsHardwareAccelerated.invoke(canvas);
            sLastCanvasIsHardwareAccelerated = (Boolean) result;
        } catch (Throwable t) {
        }
    }
    if (IS_HARDWARE_ACCELERATED_FAST_CALL)
        sLastCanvas = new WeakReference<Canvas>(canvas);
    return sLastCanvasIsHardwareAccelerated;
}

From source file:Main.java

/**
 * Execute an {@link AsyncTask} on a thread pool
 * /*  w w w . j  a  v a  2s. co m*/
 * @param forceSerial True to force the task to run in serial order
 * @param task Task to execute
 * @param args Optional arguments to pass to
 *            {@link AsyncTask#execute(Object[])}
 * @param <T> Task argument type
 */
@SuppressLint("NewApi")
public static <T> void execute(final boolean forceSerial, final AsyncTask<T, ?, ?> task, final T... args) {
    final WeakReference<AsyncTask<T, ?, ?>> taskReference = new WeakReference<AsyncTask<T, ?, ?>>(task);
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.DONUT) {
        throw new UnsupportedOperationException("This class can only be used on API 4 and newer.");
    }
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB || forceSerial) {
        taskReference.get().execute(args);
    } else {
        taskReference.get().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, args);
    }
}