Example usage for android.view ViewTreeObserver removeOnDrawListener

Introduction

In this page you can find the example usage for android.view ViewTreeObserver removeOnDrawListener.

Prototype

public void removeOnDrawListener(OnDrawListener victim) 

Source Link

Document

Remove a previously installed pre-draw callback.

Note: this method cannot be invoked from android.view.ViewTreeObserver.OnDrawListener#onDraw() .

Usage

From source file:com.google.android.apps.forscience.whistlepunk.RunReviewOverlay.java

public void onDestroy() {
    if (mChartController != null) {
        mChartController.removeChartDataLoadedCallback(this);
        if (mOnDrawListener != null) {
            final ViewTreeObserver observer = mChartController.getChartViewTreeObserver();
            if (observer != null) {
                observer.removeOnDrawListener(mOnDrawListener);
            }/*from   w  w  w .j a va2  s  .c o  m*/
            mOnDrawListener = null;
        }
        mOnLabelClickListener = null;
        mTimestampChangeListener = null;
        mOnSeekbarTouchListener = null;
    }
}

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From source file:com.google.android.apps.forscience.whistlepunk.RunReviewOverlay.java

public void refreshAfterChartLoad(final boolean backUpdateProgressBar) {
    if (!mChartController.hasDrawnChart()) {
        // Refresh the Run Review Overlay after the line graph presenter's chart
        // has finished drawing itself.
        final ViewTreeObserver observer = mChartController.getChartViewTreeObserver();
        if (observer == null) {
            return;
        }//from  www .  java  2s  . c o  m
        observer.removeOnDrawListener(mOnDrawListener);
        mOnDrawListener = new ViewTreeObserver.OnDrawListener() {
            @Override
            public void onDraw() {
                RunReviewOverlay.this.post(new Runnable() {
                    @Override
                    public void run() {
                        // The ViewTreeObserver calls its listeners without an iterator,
                        // so we need to remove the listener outside the flow or we risk
                        // an index-out-of-bounds crash in the case of multiple listeners.
                        observer.removeOnDrawListener(mOnDrawListener);
                        mOnDrawListener = null;
                        refresh(backUpdateProgressBar);
                    }
                });

            }
        };
        observer.addOnDrawListener(mOnDrawListener);
    } else {
        refresh(backUpdateProgressBar);
    }
}

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