Didn't find class "android.os.PersistableBundle"

報錯日誌

# main(1)java.lang.ClassNotFoundException Didn't find class "android.os.PersistableBundle" on path: DexPathList[[dex file "dalvik.system.DexFile@42c3d798", dex file "dalvik.system.DexFile@42c51e70", zip file "/data/app/com.fsgx.car.android.igo-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.fsgx.car.android.igo-1, /vendor/lib, /system/lib, /data/datalib]]


java.lang.NoClassDefFoundError:android/os/PersistableBundle
 java.lang.Class.getDeclaredMethods(Native Method)
 ......
 Caused by:
 java.lang.ClassNotFoundException:Didn't find class "android.os.PersistableBundle" on path: DexPathList[[dex file "dalvik.system.DexFile@42c3d798", dex file "dalvik.system.DexFile@42c51e70", zip file "/data/app/com.fsgx.car.android.igo-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.fsgx.car.android.igo-1, /vendor/lib, /system/lib, /data/datalib]]

原因

原因是在Activity中重寫了 onSaveInstanceState方法，並使用了下面的帶有PersistableBundle參數的方法。而 PersistableBundle是在android 21 增加的，所以在 API 21 以下的機器會找不到 PersistableBundle ，從而導致程序崩潰並報如上錯誤。

@override
public void onSaveInstanceState(Bundle outState) {
     super.onSaveInstanceState(outState);
}
  
@Override
public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {
    super.onSaveInstanceState(outState, outPersistentState);
}

解決辦法

如果app的 minSdkVersion 小於21，那麼重寫onSaveInstanceState時不要使用帶PersistableBundle參數的方法。