唱歌的apk在Android中給出ClassNotFoundException

Question

我正在使用eclipse Export Signed Application Package.生成單個apk Export Signed Application Package. 生成簽名的apk之后，我當時已將其安裝到設備中，但unfortunately stopped exception是，我unfortunately stopped exception由於ClassNotFoundException.導致的ClassNotFoundException. 僅在簽名的apk中發生此異常。 正常安裝工作正常。

我的錯誤記錄

05-14 18:48:39.561: E/AndroidRuntime(15982): FATAL EXCEPTION: main
05-14 18:48:39.561: E/AndroidRuntime(15982): java.lang.RuntimeException: Unable to instantiate application com.yyy.android.xxx.MyApplication: java.lang.ClassNotFoundException: com.yyy.android.xxx.MyApplication
05-14 18:48:39.561: E/AndroidRuntime(15982):    at android.app.LoadedApk.makeApplication(LoadedApk.java:482)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:3982)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at android.app.ActivityThread.access$1300(ActivityThread.java:127)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1212)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at android.os.Handler.dispatchMessage(Handler.java:99)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at android.os.Looper.loop(Looper.java:137)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at android.app.ActivityThread.main(ActivityThread.java:4503)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at java.lang.reflect.Method.invokeNative(Native Method)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at java.lang.reflect.Method.invoke(Method.java:511)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:809)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:576)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at dalvik.system.NativeStart.main(Native Method)
05-14 18:48:39.561: E/AndroidRuntime(15982): Caused by: java.lang.ClassNotFoundException: com.yyy.android.xxx.MyApplication
05-14 18:48:39.561: E/AndroidRuntime(15982):    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at android.app.Instrumentation.newApplication(Instrumentation.java:942)
05-14 18:48:39.561: E/AndroidRuntime(15982):    at android.app.LoadedApk.makeApplication(LoadedApk.java:477)

我的清單：

<application
        android:name=".MyApplication"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:largeHeap="true"
        android:logo="@drawable/title_logo"
        android:theme="@style/Theme.App" >

        <!-- Tablet Starts -->

        <activity
            android:name=".ui.StartActivity"
            android:configChanges="orientation|keyboardHidden|screenSize"
            android:label="@string/app_name"
            android:screenOrientation="landscape"
            android:theme="@style/Theme.App" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
</application>

我在“ Order and Exports標簽下選中了“ Android Private Libraries和“ Android Dependencies復選框。 我使用了proguard.cfg它包含-keep public class * extends android.app.Application 。 我未選中Run full check when exporting在Lint Error Checking下Run full check when exporting Lint Error Checking 。 請幫助我獲得簽名的APK，沒有任何問題。 謝謝。

Answer 1

確保在proguard文件中具有此選項-keep public class *擴展android.app.Application，如下所示：

 -keep public class * extends android.app.Activity
 -keep public class * extends android.app.Application
 -keep public class * extends android.app.Service
 -keep public class * extends android.content.BroadcastReceiver
 -keep public class * extends android.content.ContentProvider
 -keep public class * extends android.app.backup.BackupAgentHelper
 -keep public class * extends android.preference.Preference
 -keep public class * extends android.support.v4.app.Fragment
 -keep public class * extends android.widget.BaseAdapter
 -keep class com.android.vending.billing.**

並確保確實使用了您的proguard文件 。

Answer 2

禁用minifyEnabled true后，我遇到了同樣的問題。 如果問題僅存在於已簽名的apk上。 檢查module.gradle上的buildtypes版本

 buildTypes {
    release {
     // minifyEnabled true

    }
}