Example usage for android.view ViewTreeObserver addOnDrawListener

Introduction

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

Prototype

public void addOnDrawListener(OnDrawListener listener) 

Source Link

Document

Register a callback to be invoked when the view tree is about to be drawn.

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 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  .j a v a  2 s .c om
        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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From source file:com.android.launcher3.Launcher.java

public void onWindowVisibilityChanged(int visibility) {
    mVisible = visibility == View.VISIBLE;
    updateAutoAdvanceState();/*from  w w  w .  j a  va  2s  . co  m*/
    // The following code used to be in onResume, but it turns out onResume is called when
    // you're in All Apps and click home to go to the workspace. onWindowVisibilityChanged
    // is a more appropriate event to handle
    if (mVisible) {
        if (!mWorkspaceLoading) {
            final ViewTreeObserver observer = mWorkspace.getViewTreeObserver();
            // We want to let Launcher draw itself at least once before we force it to build
            // layers on all the workspace pages, so that transitioning to Launcher from other
            // apps is nice and speedy.
            observer.addOnDrawListener(new ViewTreeObserver.OnDrawListener() {
                private boolean mStarted = false;

                public void onDraw() {
                    if (mStarted)
                        return;
                    mStarted = true;
                    // We delay the layer building a bit in order to give
                    // other message processing a time to run.  In particular
                    // this avoids a delay in hiding the IME if it was
                    // currently shown, because doing that may involve
                    // some communication back with the app.
                    mWorkspace.postDelayed(mBuildLayersRunnable, 500);
                    final ViewTreeObserver.OnDrawListener listener = this;
                    mWorkspace.post(new Runnable() {
                        public void run() {
                            if (mWorkspace != null && mWorkspace.getViewTreeObserver() != null) {
                                mWorkspace.getViewTreeObserver().removeOnDrawListener(listener);
                            }
                        }
                    });
                    return;
                }
            });
        }
        clearTypedText();
    }
}

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From source file:com.android.soma.Launcher.java

public void onWindowVisibilityChanged(int visibility) {
    mVisible = visibility == View.VISIBLE;
    updateRunning();//  w w  w .  ja  v a2s  .c  o m
    // The following code used to be in onResume, but it turns out onResume is called when
    // you're in All Apps and click home to go to the workspace. onWindowVisibilityChanged
    // is a more appropriate event to handle
    if (mVisible) {
        mAppsCustomizeTabHost.onWindowVisible();
        if (!mWorkspaceLoading) {
            final ViewTreeObserver observer = mWorkspace.getViewTreeObserver();
            // We want to let Launcher draw itself at least once before we force it to build
            // layers on all the workspace pages, so that transitioning to Launcher from other
            // apps is nice and speedy.
            observer.addOnDrawListener(new ViewTreeObserver.OnDrawListener() {
                private boolean mStarted = false;

                public void onDraw() {
                    if (mStarted)
                        return;
                    mStarted = true;
                    // We delay the layer building a bit in order to give
                    // other message processing a time to run.  In particular
                    // this avoids a delay in hiding the IME if it was
                    // currently shown, because doing that may involve
                    // some communication back with the app.
                    mWorkspace.postDelayed(mBuildLayersRunnable, 500);
                    final ViewTreeObserver.OnDrawListener listener = this;
                    mWorkspace.post(new Runnable() {
                        public void run() {
                            if (mWorkspace != null && mWorkspace.getViewTreeObserver() != null) {
                                mWorkspace.getViewTreeObserver().removeOnDrawListener(listener);
                            }
                        }
                    });
                    return;
                }
            });
        }
        // When Launcher comes back to foreground, a different Activity might be responsible for
        // the app market intent, so refresh the icon
        if (!DISABLE_MARKET_BUTTON) {
            updateAppMarketIcon();
        }
        clearTypedText();
    }
}

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From source file:g7.bluesky.launcher3.Launcher.java

public void onWindowVisibilityChanged(int visibility) {
    mVisible = visibility == View.VISIBLE;
    updateRunning();//w  ww  . java 2 s  .co  m
    // The following code used to be in onResume, but it turns out onResume is called when
    // you're in All Apps and click home to go to the workspace. onWindowVisibilityChanged
    // is a more appropriate event to handle
    if (mVisible) {
        mAppsCustomizeTabHost.onWindowVisible();
        if (!mWorkspaceLoading) {
            final ViewTreeObserver observer = mWorkspace.getViewTreeObserver();
            // We want to let Launcher draw itself at least once before we force it to build
            // layers on all the workspace pages, so that transitioning to Launcher from other
            // apps is nice and speedy.
            observer.addOnDrawListener(new ViewTreeObserver.OnDrawListener() {
                private boolean mStarted = false;

                public void onDraw() {
                    if (mStarted)
                        return;
                    mStarted = true;
                    // We delay the layer building a bit in order to give
                    // other message processing a time to run.  In particular
                    // this avoids a delay in hiding the IME if it was
                    // currently shown, because doing that may involve
                    // some communication back with the app.
                    mWorkspace.postDelayed(mBuildLayersRunnable, 500);
                    final ViewTreeObserver.OnDrawListener listener = this;
                    mWorkspace.post(new Runnable() {
                        public void run() {
                            if (mWorkspace != null && mWorkspace.getViewTreeObserver() != null) {
                                mWorkspace.getViewTreeObserver().removeOnDrawListener(listener);
                            }
                        }
                    });
                    return;
                }
            });
        }
        clearTypedText();
    }
}

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