Binary XML file line #17<vector; tag requires viewportWidth ;0
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前言
近期把项目中的support包升级到了26.1.0，看起来在手机上运行的稳稳的，没翻船！之后提交，测试就报了一个bug说5.0以下的手机都不能运行了！因此就排查了问题原因。
问题
首先我们复现一下问题，看看崩溃日志，崩溃日志主要有以下两个：
E/VdcInflateDelegate: Exception while inflating <vector>
org.xmlpull.v1.XmlPullParserException: Binary XML file line #17<vector> tag requires viewportWidth > 0
at android.support.graphics.drawable.VectorDrawableCompat.updateStateFromTypedArray(VectorDrawableCompat.java:690)
at android.support.graphics.drawable.VectorDrawableCompat.inflate(VectorDrawableCompat.java:623)
at android.support.graphics.drawable.VectorDrawableCompat.createFromXmlInner(VectorDrawableCompat.java:586)
at android.support.v7.widget.AppCompatDrawableManager$VdcInflateDelegate.createFromXmlInner(AppCompatDrawableManager.java:777)
at android.support.v7.widget.AppCompatDrawableManager.loadDrawableFromDelegates(AppCompatDrawableManager.java:365)
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:195)
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:188)
at android.support.v7.widget.AppCompatDrawableManager.checkVectorDrawableSetup(AppCompatDrawableManager.java:755)
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:193)
at android.support.v7.widget.TintTypedArray.getDrawableIfKnown(TintTypedArray.java:87)
at android.support.v7.app.AppCompatDelegateImplBase.<init>(AppCompatDelegateImplBase.java:128)
at android.support.v7.app.AppCompatDelegateImplV9.<init>(AppCompatDelegateImplV9.java:149)
at android.support.v7.app.AppCompatDelegateImplV11.<init>(AppCompatDelegateImplV11.java:29)
at android.support.v7.app.AppCompatDelegateImplV14.<init>(AppCompatDelegateImplV14.java:54)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:202)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:183)
at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:519)
at com.xxx.common.activity.BaseActionBarActivity.installInflaterFactory(BaseActionBarActivity.java:192)
at com.xxx.common.activity.BaseActionBarActivity.onCreate(BaseActionBarActivity.java:156)
at com.xxx.activity.login.EntranceActivity.onCreate(EntranceActivity.java:64)
at android.app.Activity.performCreate(Activity.java:5356)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1089)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2151)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2236)
at android.app.ActivityThread.access$800(ActivityThread.java:138)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1199)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5122)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
at dalvik.system.NativeStart.main(Native Method) 以及如下的错误，如下的错误会导致系统崩溃不能运行。
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.xxx.debug, PID: 3565
java.lang.RuntimeException: Unable to start activity ComponentInfocom.xxx.debug/com.xxx.activity.login.EntranceActivity: android.content.res.Resources$NotFoundException: File res/drawable/abc_vector_test.xml from drawable resource ID #0x7f020052
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2187)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2236)
at android.app.ActivityThread.access$800(ActivityThread.java:138)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1199)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5122)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.content.res.Resources$NotFoundException: File res/drawable/abc_vector_test.xml from drawable resource ID #0x7f020052
at android.content.res.Resources.loadDrawable(Resources.java:2124)
at android.content.res.Resources.getDrawable(Resources.java:704)
at android.support.v7.widget.VectorEnabledTintResources.superGetDrawable(VectorEnabledTintResources.java:74)
at android.support.v7.widget.AppCompatDrawableManager.onDrawableLoadedFromResources(AppCompatDrawableManager.java:435)
at android.support.v7.widget.VectorEnabledTintResources.getDrawable(VectorEnabledTintResources.java:67)
at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:353)
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:200)
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:188)
at android.support.v7.widget.AppCompatDrawableManager.checkVectorDrawableSetup(AppCompatDrawableManager.java:755)
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:193)
at android.support.v7.widget.TintTypedArray.getDrawableIfKnown(TintTypedArray.java:87)
at android.support.v7.app.AppCompatDelegateImplBase.<init>(AppCompatDelegateImplBase.java:128)
at android.support.v7.app.AppCompatDelegateImplV9.<init>(AppCompatDelegateImplV9.java:149)
at android.support.v7.app.AppCompatDelegateImplV11.<init>(AppCompatDelegateImplV11.java:29)
at android.support.v7.app.AppCompatDelegateImplV14.<init>(AppCompatDelegateImplV14.java:54)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:202)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:183)
at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:519)
at com.xxx.common.activity.BaseActionBarActivity.installInflaterFactory(BaseActionBarActivity.java:192)
at com.xxx.common.activity.BaseActionBarActivity.onCreate(BaseActionBarActivity.java:156)
at com.xxx.activity.login.EntranceActivity.onCreate(EntranceActivity.java:64)
at android.app.Activity.performCreate(Activity.java:5356)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1089)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2151)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2236)
at android.app.ActivityThread.access$800(ActivityThread.java:138)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1199)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5122)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
at dalvik.system.NativeStart.main(Native Method)
Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #17: invalid drawable tag vector
at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:933)
at android.graphics.drawable.Drawable.createFromXml(Drawable.java:877)
at android.content.res.Resources.loadDrawable(Resources.java:2120)
at android.content.res.Resources.getDrawable(Resources.java:704)
at android.support.v7.widget.VectorEnabledTintResources.superGetDrawable(VectorEnabledTintResources.java:74)
at android.support.v7.widget.AppCompatDrawableManager.onDrawableLoadedFromResources(AppCompatDrawableManager.java:435)
at android.support.v7.widget.VectorEnabledTintResources.getDrawable(VectorEnabledTintResources.java:67)
at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:353)
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:200)
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:188)
at android.support.v7.widget.AppCompatDrawableManager.checkVectorDrawableSetup(AppCompatDrawableManager.java:755)
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:193)
at android.support.v7.widget.TintTypedArray.getDrawableIfKnown(TintTypedArray.java:87)
at android.support.v7.app.AppCompatDelegateImplBase.<init>(AppCompatDelegateImplBase.java:128)
at android.support.v7.app.AppCompatDelegateImplV9.<init>(AppCompatDelegateImplV9.java:149)
at android.support.v7.app.AppCompatDelegateImplV11.<init>(AppCompatDelegateImplV11.java:29)
at android.support.v7.app.AppCompatDelegateImplV14.<init>(AppCompatDelegateImplV14.java:54)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:202)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:183)
at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:519)
at com.xxx.common.activity.BaseActionBarActivity.installInflaterFactory(BaseActionBarActivity.java:192)
at com.xxx.common.activity.BaseActionBarActivity.onCreate(BaseActionBarActivity.java:156)
at com.xxx.activity.login.EntranceActivity.onCreate(EntranceActivity.java:64)
at android.app.Activity.performCreate(Activity.java:5356)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1089)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2151)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2236)
at android.app.ActivityThread.access$800(ActivityThread.java:138)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1199)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5122)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
at dalvik.system.NativeStart.main(Native Method) 原因
由于历史原因，以前做了很多分包的操作，因此gradle版本一直是1.2.3，不是当前最新的版本，因此写了一个Demo发现采用最新的版本不会出现崩溃。因此根据代码我们可以看到有如下执行路径：
日志1
Activity继承自AppCompatActivity，在Activity加载的时候会调用到getDelegate()函数：
@NonNull
public AppCompatDelegate getDelegate()
if (mDelegate == null)
mDelegate = AppCompatDelegate.create(this, this);
return mDelegate;
最终会调用到create函数：
private static AppCompatDelegate create(Context context, Window window,
AppCompatCallback callback)
if (Build.VERSION.SDK_INT >= 24)
return new AppCompatDelegateImplN(context, window, callback);
else if (Build.VERSION.SDK_INT >= 23)
return new AppCompatDelegateImplV23(context, window, callback);
else if (Build.VERSION.SDK_INT >= 14)
return new AppCompatDelegateImplV14(context, window, callback);
else if (Build.VERSION.SDK_INT >= 11)
return new AppCompatDelegateImplV11(context, window, callback);
else
return new AppCompatDelegateImplV9(context, window, callback);
这里我们主要是5.0以下版本会崩溃，因此我们需要查看AppCompatDelegateImplV14，里面我们一直跟踪调用父类，最终会调用到如下的代码：
final TintTypedArray a = TintTypedArray.obtainStyledAttributes(
context, null, sWindowBackgroundStyleable);
final Drawable winBg = a.getDrawableIfKnown(0);这里先解析是否有windowbackground属性，并且获取对应的drawable：
public Drawable getDrawableIfKnown(int index)
if (mWrapped.hasValue(index))
final int resourceId = mWrapped.getResourceId(index, 0);
if (resourceId != 0)
return AppCompatDrawableManager.get().getDrawable(mContext, resourceId, true);
return null;
这里recouseId不等于0，进入到AppCompatDrawableManager.中的getDrawable函数：
Drawable getDrawable(@NonNull Context context, @DrawableRes int resId,
boolean failIfNotKnown)
checkVectorDrawableSetup(context);
Drawable drawable = loadDrawableFromDelegates(context, resId);
if (drawable == null)
drawable = createDrawableIfNeeded(context, resId);
if (drawable == null)
drawable = ContextCompat.getDrawable(context, resId);
if (drawable != null)
// Tint it if needed
drawable = tintDrawable(context, resId, failIfNotKnown, drawable);
if (drawable != null)
// See if we need to 'fix' the drawable
DrawableUtils.fixDrawable(drawable);
return drawable;
getDrawable函数中首先调用了checkVectorDrawableSetup(context)函数：
private void checkVectorDrawableSetup(@NonNull Context context)
if (mHasCheckedVectorDrawableSetup)
// We've already checked so return now...
return;
// Here we will check that a known Vector drawable resource inside AppCompat can be
// correctly decoded
mHasCheckedVectorDrawableSetup = true;
final Drawable d = getDrawable(context, R.drawable.abc_vector_test);
if (d == null || !isVectorDrawable(d))
mHasCheckedVectorDrawableSetup = false;
throw new IllegalStateException("This app has been built with an incorrect "
+ "configuration. Please configure your build for VectorDrawableCompat.");
我们发现上面有一个资源R.drawable.abc_vector_test，这个系统support包里的Vector资源，我们先来看看他的xml：
<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="24dp"
android:viewportHeight="24.0"
android:viewportWidth="24.0">
<path
android:fillColor="@android:color/white"
android:pathData="M20,11L7.8,11l5.6,-5.6L12,4l-8,8l8,8l1.4,-1.4L7.8,13L20,13L20,11z"/>
</vector>我们继续往下看，这里初始状态为false，因此会继续往下执行，首先改为了true，并且继续调用了上面的getDrawable函数，因为这里改为了true，因此会进入的到getDrawable函数中的loadDrawableFromDelegates：
private Drawable loadDrawableFromDelegates(@NonNull Context context, @DrawableRes int resId)
if (mDelegates != null && !mDelegates.isEmpty())
............................
if (tv.string != null && tv.string.toString().endsWith(".xml"))
// If the resource is an XML file, let's try and parse it
try
final XmlPullParser parser = res.getXml(resId);
final AttributeSet attrs = Xml.asAttributeSet(parser);
int type;
while ((type = parser.next()) != XmlPullParser.START_TAG &&
type != XmlPullParser.END_DOCUMENT)
// Empty loop
if (type != XmlPullParser.START_TAG)
throw new XmlPullParserException("No start tag found");
final String tagName = parser.getName();
// Add the tag name to the cache
mKnownDrawableIdTags.append(resId, tagName);
// Now try and find a delegate for the tag name and inflate if found
final InflateDelegate delegate = mDelegates.get(tagName);
if (delegate != null)
dr = delegate.createFromXmlInner(context, parser, attrs,
context.getTheme());
if (dr != null)
// Add it to the drawable cache
dr.setChangingConfigurations(tv.changingConfigurations);
if (addDrawableToCache(context, key, dr) && DEBUG)
Log.i(TAG, "[loadDrawableFromDelegates] Saved drawable to cache: " +
context.getResources().getResourceName(resId));
catch (Exception e)
Log.e(TAG, "Exception while inflating drawable", e);
.............
return dr;
return null;
这里我们先删除了部分代码，只看最重要的部分，那就是delegate.createFromXmlInner，实际调用的是VectorDrawableCompat
.createFromXmlInner(context.getResources(), parser, attrs, theme)，继续调用createFromXmlInner中的inflate函数，inflate中继续调用到updateStateFromTypedArray：
private void updateStateFromTypedArray(TypedArray a, XmlPullParser parser)
throws XmlPullParserException
final VectorDrawableCompatState state = mVectorState;
final VPathRenderer pathRenderer = state.mVPathRenderer;
// Account for any configuration changes.
// state.mChangingConfigurations |= Utils.getChangingConfigurations(a);
final int mode = TypedArrayUtils.getNamedInt(a, parser, "tintMode",
AndroidResources.STYLEABLE_VECTOR_DRAWABLE_TINT_MODE, -1);
state.mTintMode = parseTintModeCompat(mode, Mode.SRC_IN);
final ColorStateList tint =
a.getColorStateList(AndroidResources.STYLEABLE_VECTOR_DRAWABLE_TINT);
if (tint != null)
state.mTint = tint;
state.mAutoMirrored = TypedArrayUtils.getNamedBoolean(a, parser, "autoMirrored",
AndroidResources.STYLEABLE_VECTOR_DRAWABLE_AUTO_MIRRORED, state.mAutoMirrored);
pathRenderer.mViewportWidth = TypedArrayUtils.getNamedFloat(a, parser, "viewportWidth",
AndroidResources.STYLEABLE_VECTOR_DRAWABLE_VIEWPORT_WIDTH,
pathRenderer.mViewportWidth);
pathRenderer.mViewportHeight = TypedArrayUtils.getNamedFloat(a, parser, "viewportHeight",
AndroidResources.STYLEABLE_VECTOR_DRAWABLE_VIEWPORT_HEIGHT,
pathRenderer.mViewportHeight);
if (pathRenderer.mViewportWidth <= 0)
throw new XmlPullParserException(a.getPositionDescription() +
"<vector> tag requires viewportWidth > 0");
else if (pathRenderer.mViewportHeight <= 0)
throw new XmlPullParserException(a.getPositionDescription() +
"<vector> tag requires viewportHeight > 0");
pathRenderer.mBaseWidth = a.getDimension(
AndroidResources.STYLEABLE_VECTOR_DRAWABLE_WIDTH, pathRenderer.mBaseWidth);
pathRenderer.mBaseHeight = a.getDimension(
AndroidResources.STYLEABLE_VECTOR_DRAWABLE_HEIGHT, pathRenderer.mBaseHeight);
if (pathRenderer.mBaseWidth <= 0)
throw new XmlPullParserException(a.getPositionDescription() +
"<vector> tag requires width > 0");
else if (pathRenderer.mBaseHeight <= 0)
throw new XmlPullParserException(a.getPositionDescription() +
"<vector> tag requires height > 0");
// shown up from API 11.
final float alphaInFloat = TypedArrayUtils.getNamedFloat(a, parser, "alpha",
AndroidResources.STYLEABLE_VECTOR_DRAWABLE_ALPHA, pathRenderer.getAlpha());
pathRenderer.setAlpha(alphaInFloat);
final String name = a.getString(AndroidResources.STYLEABLE_VECTOR_DRAWABLE_NAME);
if (name != null)
pathRenderer.mRootName = name;
pathRenderer.mVGTargetsMap.put(name, pathRenderer);
这里调用TypedArrayUtils.getNamedFloat会去解析viewportWidth与viewportHeight：
public static float getNamedFloat(@NonNull TypedArray a, @NonNull XmlPullParser parser,
@NonNull String attrName, @StyleableRes int resId, float defaultValue)
final boolean hasAttr = hasAttribute(parser, attrName);
if (!hasAttr)
return defaultValue;
else
return a.getFloat(resId, defaultValue);
public static boolean hasAttribute(@NonNull XmlPullParser parser, @NonNull String attrName)
return parser.getAttributeValue(NAMESPACE, attrName) != null;
这里会发现viewportHeight与viewportWidth不存在，但是我们上面的xml里明明有这两个属性，为什么到这个地方就没有了？
gradle 1.2.3调用aapt编译资源，因为VectorDrawable是21才加入的，因此他不认识这两个属性，被优化掉了，同时优化掉的还有path中的内容
由于上面的原因，xml在编译后viewportWidth与viewportHeight会移除了，因此在解析的时候返回了0，系统检测该值，抛出了异常！
- 为什么23的版本不崩溃
23版本的内容未做检查，不会调用checkVectorDrawableSetup函数
日志2
上面有两个日志，第一个日志我们已经清楚了，只是抛出了异常，而不会导致崩溃，那为什么系统会崩溃，我们看到上面日志的下半部分与日志1相同，所以原因也是一样的，我们继续往下看loadDrawableFromDelegates解析失败后drawable为空，会继续执行createDrawableIfNeeded，这里只是对想要资源做了检查，因此最终会调用到ContextCompat.getDrawable中：
public static final Drawable getDrawable(Context context, @DrawableRes int id)
if (Build.VERSION.SDK_INT >= 21)
return context.getDrawable(id);
else if (Build.VERSION.SDK_INT >= 16)
return context.getResources().getDrawable(id);
else
// Prior to JELLY_BEAN, Resources.getDrawable() would not correctly
// retrieve the final configuration density when the resource ID
// is a reference another Drawable resource. As a workaround, try
// to resolve the drawable reference manually.
final int resolvedId;
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