有人知道可能是随机发生的错误的来源，而无法确定明确的情况吗？
java.lang.RuntimeException: Unable to start activity ComponentInfo {com.xxx/com.xxx.activities.SplashActivity}: android.view.InflateException: Binary XML file line #38: Error inflating class <unknown>
布局中的片段发布在下面：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/dark_gray">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:orientation="vertical">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="@drawable/xl" />
<TextView
android:id="@+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-light"
android:gravity="center"
android:padding="10dp"
android:text="xxx"
android:textColor="#FFF"
android:textSize="24sp" />
</LinearLayout>
<RelativeLayout
android:id="@+id/welcomeContent"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.xxx.utils.ParallaxViewPager // line 38
android:id="@+id/parallaxviewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/bg_parallax">
类 com.xxx.utils.ParallaxViewPager 存在，我可以非常随机地捕获错误。
public class ParallaxViewPager extends ViewPager {
public static final int FIT_WIDTH = 0;
public static final int FIT_HEIGHT = 1;
public static final float OVERLAP_FULL = 1f;
public static final float OVERLAP_HALF = 0.5f;
public static final float OVERLAP_QUARTER = 0.25f;
private static final float CORRECTION_PERCENTAGE = 0.01f;
public Bitmap bitmap;
private Rect source, destination;
private int scaleType;
private int chunkWidth;
private int projectedWidth;
private float overlap;
private OnPageChangeListener secondOnPageChangeListener;
private TextView[] dots;
private ScrollerCustomDuration mScroller = null;
float mStartDragX;
OnSwipeOutListener mListener;
public ParallaxViewPager(Context context) {
super(context);
init();
}
public ParallaxViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
init();
postInitViewPager();
}
public void setScrollDurationFactor(double scrollFactor) {
mScroller.setScrollDurationFactor(scrollFactor);
}
public void setOnSwipeOutListener(OnSwipeOutListener listener) {
mListener = listener;
}
private void init() {
source = new Rect();
destination = new Rect();
scaleType = FIT_HEIGHT;
overlap = OVERLAP_HALF;
setOnPageChangeListener(new OnPageChangeListener() {
@Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if (position < 3) {
if (bitmap != null) {
source.left = (int) Math.floor((position + positionOffset - CORRECTION_PERCENTAGE) * chunkWidth);
source.right = (int) Math.ceil((position + positionOffset + CORRECTION_PERCENTAGE) * chunkWidth + projectedWidth);
destination.left = (int) Math.floor((position + positionOffset - CORRECTION_PERCENTAGE) * getWidth());
destination.right = (int) Math.ceil((position + positionOffset + 1 + CORRECTION_PERCENTAGE) * getWidth());
invalidate();
}
if (secondOnPageChangeListener != null) {
secondOnPageChangeListener.onPageScrolled(position, positionOffset, positionOffsetPixels);
}
}
}
@Override public void onPageSelected(int position) {
if (secondOnPageChangeListener != null) {
secondOnPageChangeListener.onPageSelected(position);
}
for (int i = 0; i < 3; i++) {
dots[i].setTextColor(getResources().getColor(android.R.color.darker_gray));
}
if (position < 3) {
dots[position].setTextColor(getResources().getColor(R.color.tw__solid_white));
}
if (position == 3) {
mListener.onSwipeOutAtEnd();
}
}
@Override public void onPageScrollStateChanged(int state) {
if (secondOnPageChangeListener != null) {
secondOnPageChangeListener.onPageScrollStateChanged(state);
}
}
});
}
@Override protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
destination.top = 0;
destination.bottom = h;
if (getAdapter() != null && bitmap != null)
calculateParallaxParameters();
}
private void calculateParallaxParameters() {
if (bitmap.getWidth() < getWidth() && bitmap.getWidth() < bitmap.getHeight() && scaleType == FIT_HEIGHT) {
Log.w(ParallaxViewPager.class.getName(), "Invalid bitmap bounds for the current device, parallax effect will not work.");
}
final float ratio = (float) getHeight() / bitmap.getHeight();
if (ratio != 1) {
switch (scaleType) {
case FIT_WIDTH:
source.top = (int) ((bitmap.getHeight() - bitmap.getHeight() / ratio) / 2);
source.bottom = bitmap.getHeight() - source.top;
chunkWidth = (int) Math.ceil((float) bitmap.getWidth() / (float) getAdapter().getCount());
projectedWidth = chunkWidth;
break;
case FIT_HEIGHT:
default:
source.top = 0;
source.bottom = bitmap.getHeight();
projectedWidth = (int) Math.ceil(getWidth() / ratio);
chunkWidth = (int) Math.ceil((bitmap.getWidth() - projectedWidth) / (float) getAdapter().getCount() * overlap);
break;
}
}
}
/**
* Sets the background from a resource file.
*
* @param resid
*/
@Override public void setBackgroundResource(int resid) {
bitmap = BitmapFactory.decodeResource(getResources(), resid);
}
/**
* Sets the background from a Drawable.
*
* @param background
*/
@Override public void setBackground(Drawable background) {
bitmap = ((BitmapDrawable) background).getBitmap();
}
/**
* Deprecated.
* Sets the background from a Drawable.
*
* @param background
*/
@Override public void setBackgroundDrawable(Drawable background) {
bitmap = ((BitmapDrawable) background).getBitmap();
}
/**
* Sets the background from a bitmap.
*
* @param bitmap
* @return The ParallaxViewPager object itself.
*/
public ParallaxViewPager setBackground(Bitmap bitmap) {
this.bitmap = bitmap;
return this;
}
/**
* Sets how the view should scale the background. The available choices are:
* <ul>
* <li>FIT_HEIGHT - the height of the image is resized to matched the height of the View, also stretching the width to keep the aspect ratio. The non-visible part of the bitmap is divided into equal parts, each of them sliding in at the proper position.</li>
* <li>FIT_WIDTH - the width of the background image is divided into equal chunks, each taking up the whole width of the screen.</li>
* </ul>
*
* @param scaleType
* @return
*/
public ParallaxViewPager setScaleType(final int scaleType) {
if (scaleType != FIT_WIDTH && scaleType != FIT_HEIGHT)
throw new IllegalArgumentException("Illegal argument: scaleType must be FIT_WIDTH or FIT_HEIGHT");
this.scaleType = scaleType;
return this;
}
/**
* Sets the amount of overlapping with the setOverlapPercentage(final float percentage) method. This is a number between 0 and 1, the smaller it is, the slower is the background scrolling.
*
* @param percentage
* @return The ParallaxViewPager object itself.
*/
public ParallaxViewPager setOverlapPercentage(final float percentage) {
if (percentage <= 0 || percentage >= 1)
throw new IllegalArgumentException("Illegal argument: percentage must be between 0 and 1");
overlap = percentage;
return this;
}
/**
* Recalculates the parameters of the parallax effect, useful after changes in runtime.
*
* @return The ParallaxViewPager object itself.
*/
public ParallaxViewPager invalidateParallaxParameters() {
calculateParallaxParameters();
return this;
}
@Override protected void onDraw(Canvas canvas) {
if (bitmap != null)
canvas.drawBitmap(bitmap, source, destination, null);
}
public void addOnPageChangeListener(OnPageChangeListener listener) {
secondOnPageChangeListener = listener;
}
public TextView[] getDots() {
return dots;
}
public void setDots(TextView[] dots) {
this.dots = dots;
}
private void postInitViewPager() {
try {
Class<?> viewpager = ViewPager.class;
Field scroller = viewpager.getDeclaredField("mScroller");
scroller.setAccessible(true);
Field interpolator = viewpager.getDeclaredField("sInterpolator");
interpolator.setAccessible(true);
mScroller = new ScrollerCustomDuration(getContext(),
(Interpolator) interpolator.get(null));
scroller.set(this, mScroller);
} catch (Exception e) {
Log.e("MyPager", e.getMessage());
}
}
class ScrollerCustomDuration extends Scroller {
private double mScrollFactor = 2;
public ScrollerCustomDuration(Context context) {
super(context);
}
public ScrollerCustomDuration(Context context, Interpolator interpolator) {
super(context, interpolator);
}
public ScrollerCustomDuration(Context context,
Interpolator interpolator, boolean flywheel) {
super(context, interpolator, flywheel);
}
/**
* Set the factor by which the duration will change
*/
public void setScrollDurationFactor(double scrollFactor) {
mScrollFactor = scrollFactor;
}
@Override
public void startScroll(int startX, int startY, int dx, int dy,
int duration) {
super.startScroll(startX, startY, dx, dy,
(int) (duration * mScrollFactor));
}
}
public interface OnSwipeOutListener {
public void onSwipeOutAtEnd();
}}
感谢您的意见。