Question

我正在编写一个新的应用程序，我尝试使用不同的版本。当我在Nougat尝试时，我的应用程序无法打开。它只是说：

应用已停止。再次打开应用程序？

如果我再次按下打开，应用程序会一直停止。

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"  


    defaultConfig {       
        minSdkVersion 11
        targetSdkVersion 25
        versionCode 1
        versionName "2.0"
        multiDexEnabled true
    }
}

我尝试使用buildToolsVersion“25.0.1”和nope。有什么帮助吗？

当我尝试在Nougat设备中打开它时，这是我的logcat跟踪

05-10 09:49:35.119 4709-4709/app E/app: /storage/emulated/0/app/Registros/grupo-registros.csv (No such file or directory)
                                                   java.io.FileNotFoundException: /storage/emulated/0/app/Registros/grupo(demo)-registros.csv (No such file or directory)
                                                       at java.io.FileOutputStream.open(Native Method)
                                                       at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
                                                       at java.io.FileOutputStream.<init>(FileOutputStream.java:140)
                                                       at app.MainActivity.onCreate(MainActivity.java:175)
                                                       at android.app.Activity.performCreate(Activity.java:6679)
                                                       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
                                                       at android.app.ActivityThread.-wrap12(ActivityThread.java)
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
                                                       at android.os.Handler.dispatchMessage(Handler.java:102)
                                                       at android.os.Looper.loop(Looper.java:154)
                                                       at android.app.ActivityThread.main(ActivityThread.java:6119)
                                                       at java.lang.reflect.Method.invoke(Native Method)
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
 05-10 09:49:35.148 4709-4709/app D/AndroidRuntime: Shutting down VM
 05-10 09:49:35.148 4709-4709/app E/AndroidRuntime: FATAL EXCEPTION: main
                                                          Process: app, PID: 4709
                                                          java.lang.RuntimeException: Unable to start activity ComponentInfo{es/app.MainActivity}: java.util.EmptyStackException
                                                              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
                                                              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
                                                              at android.app.ActivityThread.-wrap12(ActivityThread.java)
                                                              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
                                                              at android.os.Handler.dispatchMessage(Handler.java:102)
                                                              at android.os.Looper.loop(Looper.java:154)
                                                              at android.app.ActivityThread.main(ActivityThread.java:6119)
                                                              at java.lang.reflect.Method.invoke(Native Method)
                                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
                                                           Caused by: java.util.EmptyStackException
                                                              at app.MainActivity.copyFileOrDir(MainActivity.java:434)
                                                              at app.MainActivity.addSubjectDemo(MainActivity.java:341)
                                                              at app.MainActivity.onCreate(MainActivity.java:231)
                                                              at android.app.Activity.performCreate(Activity.java:6679)
                                                              at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
                                                              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
                                                              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726) 
                                                              at android.app.ActivityThread.-wrap12(ActivityThread.java) 
                                                              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477) 
                                                              at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                              at android.os.Looper.loop(Looper.java:154) 
                                                              at android.app.ActivityThread.main(ActivityThread.java:6119) 
                                                              at java.lang.reflect.Method.invoke(Native Method) 
                                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
                                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

编辑：我的清单许可请求

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.DISABLE_KEYGUARD" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.MANAGE_DOCUMENTS" />

Answer 1

java.io.FileNotFoundException:/storage/emulated/0/app/Registros/grupo(demo)-registros.csv (No such file or directory)

这可能是因为在Nougat-Android 7.0中，对权限的更改可能会影响您的应用。它没有强制执行，但它会弹出您可能无法处理的异常。您应该阅读文档：

https://developer.android.com/about/versions/nougat/android-7.0-changes.html

并查看此答案

Android 7.1 Write to text file

应用程序无法在Nougat中打开

1 个答案: