起因

最近從錯(cuò)誤日志中檢查到一個(gè)異常崩潰：

 java.lang.RuntimeException: Package manager has died
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3151)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3261)
at android.app.ActivityThread.access$1000(ActivityThread.java:219)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1735)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6939)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
Caused by: java.lang.RuntimeException: Package manager has died
at android.app.ApplicationPackageManager.getPackageInfo(ApplicationPackageManager.java:167)
at com.umeng.socialize.utils.DeviceConfig.isAppInstalled(DeviceConfig.java:46)
at com.umeng.socialize.sso.UMTencentSsoHandler.isClientInstalled(UMTencentSsoHandler.java:456)
at com.haodf.android.posttreatment.doctorhonnrreflect.fragment.UmengShareUtil.shareContentToQQZone(UmengShareUtil.java:220)
at com.haodf.android.basic.home.extension.AdDetailActivity.init(AdDetailActivity.java:74)
at com.haodf.android.base.activity.AbsBaseActivity.onCreate(AbsBaseActivity.java:116)
at android.app.Activity.performCreate(Activity.java:6609)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1134)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3104)
... 10 more
Caused by: android.os.TransactionTooLargeException
at android.os.BinderProxy.transactNative(Native Method)
at android.os.BinderProxy.transact(Binder.java:496)
at android.content.pm.IPackageManager$Stub$Proxy.getPackageInfo(IPackageManager.java:2222)
at android.app.ApplicationPackageManager.getPackageInfo(ApplicationPackageManager.java:162)
... 18 more
java.lang.RuntimeException: Package manager has died
at android.app.ApplicationPackageManager.getPackageInfo(ApplicationPackageManager.java:167)
at com.umeng.socialize.utils.DeviceConfig.isAppInstalled(DeviceConfig.java:46)
at com.umeng.socialize.sso.UMTencentSsoHandler.isClientInstalled(UMTencentSsoHandler.java:456)
at com.haodf.android.posttreatment.doctorhonnrreflect.fragment.UmengShareUtil.shareContentToQQZone(UmengShareUtil.java:220)
at com.haodf.android.basic.home.extension.AdDetailActivity.init(AdDetailActivity.java:74)
at com.haodf.android.base.activity.AbsBaseActivity.onCreate(AbsBaseActivity.java:116)
at android.app.Activity.performCreate(Activity.java:6609)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1134)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3104)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3261)
at android.app.ActivityThread.access$1000(ActivityThread.java:219)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1735)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6939)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
Caused by: android.os.TransactionTooLargeException
at android.os.BinderProxy.transactNative(Native Method)
at android.os.BinderProxy.transact(Binder.java:496)
at android.content.pm.IPackageManager$Stub$Proxy.getPackageInfo(IPackageManager.java:2222)
at android.app.ApplicationPackageManager.getPackageInfo(ApplicationPackageManager.java:162)
... 18 more
android.os.TransactionTooLargeException
at android.os.BinderProxy.transactNative(Native Method)
at android.os.BinderProxy.transact(Binder.java:496)
at android.content.pm.IPackageManager$Stub$Proxy.getPackageInfo(IPackageManager.java:2222)
at android.app.ApplicationPackageManager.getPackageInfo(ApplicationPackageManager.java:162)
at com.umeng.socialize.utils.DeviceConfig.isAppInstalled(DeviceConfig.java:46)
at com.umeng.socialize.sso.UMTencentSsoHandler.isClientInstalled(UMTencentSsoHandler.java:456)
at com.haodf.android.posttreatment.doctorhonnrreflect.fragment.UmengShareUtil.shareContentToQQZone(UmengShareUtil.java:220)
at com.haodf.android.basic.home.extension.AdDetailActivity.init(AdDetailActivity.java:74)
at com.haodf.android.base.activity.AbsBaseActivity.onCreate(AbsBaseActivity.java:116)
at android.app.Activity.performCreate(Activity.java:6609)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1134)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3104)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3261)
at android.app.ActivityThread.access$1000(ActivityThread.java:219)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1735)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6939)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)

分析

該異常由友盟SDK拋出，友盟SDK在進(jìn)行QQ分享之前調(diào)用下方代碼判斷是否已安裝該應(yīng)用。

    public static boolean isAppInstalled(String var0, Context var1) {
        if(var1 == null) {
            return false;
        } else {
            PackageManager var2 = var1.getPackageManager();
            boolean var3 = false;

            try {
                var2.getPackageInfo(var0, 1);
                var3 = true;
            } catch (NameNotFoundException var5) {
                var3 = false;
            }

            return var3;
        }
    }

在這段代碼中，var2.getPackageInfo(var0, 1);調(diào)用時(shí)可能引發(fā)java.lang.RuntimeException: Package manager has died這個(gè)異常。原因是目前版本的QQ（v6.6.9）PackageInfo中數(shù)據(jù)量太大了，在部分手機(jī)上超出了Binder可傳遞的最大容量，進(jìn)而導(dǎo)致PacakgeManager崩潰。

驗(yàn)證

我在三星S6 Android6.0.1這部手機(jī)上重現(xiàn)了這個(gè)崩潰。當(dāng)我將QQ換為一個(gè)較早的版本后，上面檢測(cè)的這段代碼不會(huì)引起崩潰，因此驗(yàn)證了我的推斷：近期QQ的更新使得PackageInfo增大引發(fā)這個(gè)異常。另外，這個(gè)崩潰不會(huì)在所有機(jī)型上出現(xiàn)，也不是偶現(xiàn)，只在部分機(jī)型上必現(xiàn)。推測(cè)和系統(tǒng)層中對(duì)Binder傳遞數(shù)據(jù)最大容量的不同限制大小有關(guān)。

解決

如果是使用友盟分享SDK時(shí)發(fā)生的問題，請(qǐng)將SDK更新到Android 社會(huì)化組件SDK v6.2.3（2017-1-23)以上版本即可修復(fù)。

如果是自己寫的判斷方法報(bào)錯(cuò)，繼續(xù)往下看。
最直接的想法是catch住這個(gè)異常，這樣處理的確能夠避免引發(fā)崩潰，可以用來緊急解決崩潰的問題。但是這樣做還是無法正常判斷QQ是否已經(jīng)安裝。
既然是PackageInfo過大那么我們可以嘗試改變getPackageInfo(var0, 1)它的第二個(gè)參數(shù)flag，使得該方法返回的對(duì)象容量減小。

    /**
     * Retrieve overall information about an application package that is
     * installed on the system.
     * <p>
     * Throws {@link NameNotFoundException} if a package with the given name can
     * not be found on the system.
     *
     * @param packageName The full name (i.e. com.google.apps.contacts) of the
     *            desired package.
     * @param flags Additional option flags. Use any combination of
     *            {@link #GET_ACTIVITIES}, {@link #GET_GIDS},
     *            {@link #GET_CONFIGURATIONS}, {@link #GET_INSTRUMENTATION},
     *            {@link #GET_PERMISSIONS}, {@link #GET_PROVIDERS},
     *            {@link #GET_RECEIVERS}, {@link #GET_SERVICES},
     *            {@link #GET_SIGNATURES}, {@link #GET_UNINSTALLED_PACKAGES} to
     *            modify the data returned.
     * @return Returns a PackageInfo object containing information about the
     *         package. If flag GET_UNINSTALLED_PACKAGES is set and if the
     *         package is not found in the list of installed applications, the
     *         package information is retrieved from the list of uninstalled
     *         applications (which includes installed applications as well as
     *         applications with data directory i.e. applications which had been
     *         deleted with {@code DONT_DELETE_DATA} flag set).
     * @see #GET_ACTIVITIES
     * @see #GET_GIDS
     * @see #GET_CONFIGURATIONS
     * @see #GET_INSTRUMENTATION
     * @see #GET_PERMISSIONS
     * @see #GET_PROVIDERS
     * @see #GET_RECEIVERS
     * @see #GET_SERVICES
     * @see #GET_SIGNATURES
     * @see #GET_UNINSTALLED_PACKAGES
     */
    public abstract PackageInfo getPackageInfo(String packageName, int flags)
            throws NameNotFoundException;

在注釋中可以看到GET_SIGNATURES這個(gè)flag，它的作用是返回應(yīng)用的簽名，我們知道任何應(yīng)用都只有一個(gè)簽名，它的大小應(yīng)該是相對(duì)固定的。那么我們只需要改變參數(shù)flag的值即可在正確檢查是否安裝應(yīng)用的同時(shí)避免引發(fā)崩潰。

    public static boolean isAppInstalled(String var0, Context var1) {
        if(var1 == null) {
            return false;
        } else {
            PackageManager var2 = var1.getPackageManager();
            boolean var3 = false;

            try {
                var2.getPackageInfo(var0, PackageManager.GET_SIGNATURES);
                var3 = true;
            } catch (NameNotFoundException var5) {
                var3 = false;
            }

            return var3;
        }
    }

總結(jié)

雖然這次引發(fā)崩潰的是QQ，但今后我們?cè)趹?yīng)用中獲取其它應(yīng)用的PackageInfo時(shí)都應(yīng)該注意這個(gè)問題，傳遞恰當(dāng)?shù)膄lag避免同類問題的產(chǎn)生。