Created
May 21, 2014 09:56
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Similar to the LoadingProgressSpinner which doesnt flicker if you change stages quickly.
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public abstract class ContentLoadingFrameLayout extends FrameLayout { | |
private static final int MIN_SHOW_TIME = 200; // ms | |
private static final int MIN_DELAY = 200; // ms | |
private ProgressBar mProgressBar; | |
private View mContent; | |
private long mStartTime = -1; | |
private boolean mPostedHide = false; | |
private boolean mPostedShow = false; | |
private boolean mDismissed = false; | |
private final Runnable mDelayedHide = new Runnable() { | |
@Override | |
public void run() { | |
mPostedHide = false; | |
mStartTime = -1; | |
hide(); | |
} | |
}; | |
private final Runnable mDelayedShow = new Runnable() { | |
@Override | |
public void run() { | |
mPostedShow = false; | |
if (!mDismissed) { | |
mStartTime = System.currentTimeMillis(); | |
show(); | |
} | |
} | |
}; | |
public ContentLoadingFrameLayout(Context context) { | |
super(context); | |
init(context); | |
} | |
public ContentLoadingFrameLayout(Context context, AttributeSet attrs) { | |
super(context, attrs); | |
init(context); | |
} | |
public ContentLoadingFrameLayout(Context context, AttributeSet attrs, int defStyle) { | |
super(context, attrs, defStyle); | |
init(context); | |
} | |
private void init(Context context) { | |
LayoutInflater.from(context).inflate(R.layout.layout_content_loading_include, this, true); | |
mProgressBar = ButterKnife.findById(this, R.id.content_loading_progress_bar); | |
mProgressBar.setAlpha(0f); | |
} | |
@Override | |
protected void onFinishInflate() { | |
super.onFinishInflate(); | |
if (mContent == null) { | |
for (int i = 0; i < getChildCount(); i++) { | |
if (getChildAt(i) != mProgressBar) { | |
mContent = getChildAt(i); | |
break; | |
} | |
} | |
} | |
} | |
@Override | |
public void onAttachedToWindow() { | |
super.onAttachedToWindow(); | |
removeCallbacks(); | |
} | |
@Override | |
public void onDetachedFromWindow() { | |
super.onDetachedFromWindow(); | |
removeCallbacks(); | |
} | |
private void removeCallbacks() { | |
removeCallbacks(mDelayedHide); | |
removeCallbacks(mDelayedShow); | |
} | |
/** | |
* Hide the progress view if it is visible. The progress view will not be | |
* hidden until it has been shown for at least a minimum show time. If the | |
* progress view was not yet visible, cancels showing the progress view. | |
*/ | |
public void hideLoading() { | |
mDismissed = true; | |
removeCallbacks(mDelayedShow); | |
long diff = System.currentTimeMillis() - mStartTime; | |
if (diff >= MIN_SHOW_TIME || mStartTime == -1) { | |
// The progress spinner has been shown long enough | |
// OR was not shown yet. If it wasn't shown yet, | |
// it will just never be shown. | |
hide(); | |
} else { | |
// The progress spinner is shown, but not long enough, | |
// so put a delayed message in to hide it when its been | |
// shown long enough. | |
if (!mPostedHide) { | |
postDelayed(mDelayedHide, MIN_SHOW_TIME - diff); | |
mPostedHide = true; | |
} | |
} | |
} | |
/** | |
* Show the progress view after waiting for a minimum delay. If | |
* during that time, hide() is called, the view is never made visible. | |
*/ | |
public void showLoading() { | |
// Reset the start time. | |
mStartTime = -1; | |
mDismissed = false; | |
removeCallbacks(mDelayedHide); | |
if (!mPostedShow) { | |
postDelayed(mDelayedShow, MIN_DELAY); | |
mPostedShow = true; | |
} | |
} | |
private void hide() { | |
mProgressBar.animate() | |
.alpha(0f) | |
.setDuration(MIN_DELAY) | |
.start(); | |
if (mContent == null) return; | |
mContent.animate() | |
.alpha(1f) | |
.setDuration(MIN_DELAY) | |
.start(); | |
} | |
private void show() { | |
mProgressBar.animate() | |
.alpha(1f) | |
.setDuration(MIN_DELAY) | |
.start(); | |
if (mContent == null) return; | |
mContent.animate() | |
.alpha(0.2f) | |
.setDuration(MIN_DELAY) | |
.start(); | |
} | |
} |
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