引起：java.lang.IllegalStateException：包未安裝？

Question

06-26 05:07:17.890: E/AndroidRuntime(3231): FATAL EXCEPTION: main
06-26 05:07:17.890: E/AndroidRuntime(3231): Process: com.sample.calendar, PID: 3231
06-26 05:07:17.890: E/AndroidRuntime(3231): java.lang.RuntimeException: Unable to instantiate application android.app.Application: java.lang.IllegalStateException: Unable to get package info for com.sample.calendar; is package not installed?
06-26 05:07:17.890: E/AndroidRuntime(3231):     at android.app.LoadedApk.makeApplication(LoadedApk.java:516)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4317)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at android.app.ActivityThread.access$1500(ActivityThread.java:135)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at android.os.Handler.dispatchMessage(Handler.java:102)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at android.os.Looper.loop(Looper.java:136)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at android.app.ActivityThread.main(ActivityThread.java:5017)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at java.lang.reflect.Method.invokeNative(Native Method)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at java.lang.reflect.Method.invoke(Method.java:515)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at dalvik.system.NativeStart.main(Native Method)
06-26 05:07:17.890: E/AndroidRuntime(3231): Caused by: java.lang.IllegalStateException: Unable to get package info for com.sample.calendar; is package not installed?
06-26 05:07:17.890: E/AndroidRuntime(3231):     at android.app.LoadedApk.initializeJavaContextClassLoader(LoadedApk.java:376)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at android.app.LoadedApk.getClassLoader(LoadedApk.java:329)
06-26 05:07:17.890: E/AndroidRuntime(3231):     at android.app.LoadedApk.makeApplication(LoadedApk.java:508)
06-26 05:07:17.890: E/AndroidRuntime(3231):     ... 11 more

我在logcat中遇到這種錯誤。 雖然我收到此錯誤，但我的項目運行正常。所以我只是想澄清一下這個錯誤：

1.what causes this error?

2.what may happened if the error persist?

3.how to fix this error?

Answer 1

我認為當你已經安裝了以前的版本時從eclipse運行應用程序時會發生這種情況嗎？ 如果在從eclipse再次運行應用程序之前卸載應用程序，則不會發生這種情況。 此外，這不會導致任何問題。

Answer 2

嘗試在build.gradle文件中使用較舊的gradle依賴項版本。 它幫助了我。

使用：

compile 'com.android.support:appcompat-v7:23.1.0'
compile 'com.android.support:design:23.1.0'

不要使用：

compile 'com.android.support:appcompat-v7:23.2.0'
compile 'com.android.support:design:23.2.0'

我在這里找到解決方案 - Android Studio FloatingActionButton錯誤