[英]Android - app crashes when using a signed APK
I am trying to get a signed APK for my Android app. 我正在尝试为我的Android应用获取签名的APK。 The app works perfectly when I install it through Android studio but when I generate a signed APK and install the app using that APK I get the following exception.
通过Android Studio安装该应用程序时,该应用程序运行完美,但是当我生成签名的APK并使用该APK安装应用程序时,出现以下异常。 Any idea on what could be going on?
有什么想法吗?
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app.test/com.app.test.activities.MenuActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equalsIgnoreCase(java.lang.String)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2420)
at android.app.ActivityThread.access$900(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5292)
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:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equalsIgnoreCase(java.lang.String)' on a null object reference
at com.app.test.h.a.e(Unknown Source)
at com.app.test.activities.MenuActivity.a(Unknown Source)
at com.app.test.activities.MenuActivity.onCreate(Unknown Source)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2311)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2420)
at android.app.ActivityThread.access$900(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5292)
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:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
This is what the gradle build file looks like 这是gradle构建文件的样子
buildscript {
}
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
// that you installed in the SDK manager
defaultConfig {
applicationId "com.app.test"
minSdkVersion 17
targetSdkVersion 21
versionCode 1
versionName "1.0"
multiDexEnabled true
}
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
repositories {
mavenCentral()
flatDir {
dirs 'libs'
}
maven { url 'http://maven.livotovlabs.pro/content/groups/public' }
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:support-v4:21.0.3'
compile 'com.google.android.gms:play-services:6.5.87'
compile 'com.google.code.gson:gson:2.3.1'
compile 'com.squareup.okhttp:okhttp:2.5.0'
compile 'com.squareup.picasso:picasso:2.5.2'
}
You are using proguard and you have enables it by setting minifyEnabled to true. 您正在使用proguard,并且已通过将minifyEnabled设置为true启用了它。
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
If you dont want to use it make minifyEnabled false. 如果您不想使用它,请将minifyEnabled设置为false。 Otherwise read about how to use proguard http://developer.android.com/tools/help/proguard.html here as it discards the class files and other resource that are not added in proguard-rules.pro.
否则,请在此处阅读有关如何使用proguard的信息http://developer.android.com/tools/help/proguard.html ,因为它会丢弃没有在proguard-rules.pro中添加的类文件和其他资源。
I change minifyEnabled
from true
to false
as follow: 我将
minifyEnabled
从true
更改为false
,如下所示:
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
debuggable false
and it works fine. 而且效果很好。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.