我遇到了这个麻烦，因为它只发生在我使用签名的apk时。我搜索了另一篇文章中的任何解决方案，包括this。
这是我的build.gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
buildToolsVersion '26.0.2'
defaultConfig {
applicationId "com.example.user.matelacc"
minSdkVersion 17
targetSdkVersion 26
versionCode 1
versionName "1.7"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
}
packagingOptions {
exclude 'META-INF/DEPENDENCIES.txt'
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/NOTICE.txt'
exclude 'META-INF/NOTICE'
exclude 'META-INF/LICENSE'
exclude 'META-INF/DEPENDENCIES'
exclude 'META-INF/notice.txt'
exclude 'META-INF/license.txt'
exclude 'META-INF/dependencies.txt'
exclude 'META-INF/LGPL2.1'
}
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
compileOptions {
}
lintOptions {
checkReleaseBuilds false
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile files('libs/activation.jar')
compile files('libs/additionnal.jar')
compile files('libs/mail.jar')
compile 'com.google.android.gms:play-services-places:11.8.0'
compile 'com.android.support:appcompat-v7:26.1.0'
compile 'com.android.support:design:26.1.0'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.squareup.picasso:picasso:2.5.2'
compile 'com.google.android.gms:play-services-maps:11.8.0'
compile 'com.google.android.gms:play-services-fitness:11.8.0'
compile 'com.google.android.gms:play-services-wearable:11.8.0'
compile 'com.google.android.gms:play-services-location:11.8.0'
compile 'com.google.android.gms:play-services-identity:11.8.0'
compile 'com.squareup.okhttp3:okhttp:3.7.0'
compile 'com.mcxiaoke.volley:library:1.0.19'
testCompile 'junit:junit:4.12'
}
当我将minifyEnabled设置为false时，它会在签名的apk中顺利运行，但是当我将其设置为true时，它会显示错误导致类android.support.design.widget.NavigationView 。
我有几个问题， 1.为什么会这样？ 2.如何解决？
任何帮助都会有所帮助。提前谢谢。
错误
02-12 08:32:53.607 22228-22228/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.user.matelacc, PID: 22228
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.user.matelacc/com.example.user.matelacc.MenuActivity}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.design.widget.NavigationView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2984)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3045)
at android.app.ActivityThread.-wrap14(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1642)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386)
Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.design.widget.NavigationView
Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class android.support.design.widget.NavigationView
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
at android.view.LayoutInflater.createView(LayoutInflater.java:652)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:794)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:734)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:865)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:828)
at android.view.LayoutInflater.inflate(LayoutInflater.java:525)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:378)
at android.support.v7.app.ap.b(Unknown Source)
at android.support.v7.app.z.setContentView(Unknown Source)
at com.example.user.matelacc.MenuActivity.onCreate(Unknown Source)
at android.app.Activity.performCreate(Activity.java:6955)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1126)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2927)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3045)
at android.app.ActivityThread.-wrap14(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1642)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386)
Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class ImageView
Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class ImageView
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.av.d()' on a null object reference
at android.support.v7.widget.aw.setImageDrawable(Unknown Source)
at android.widget.ImageView.<init>(ImageView.java:159)
at android.widget.ImageView.<init>(ImageView.java:145)
at android.support.v7.widget.aw.<init>(Unknown Source)
at android.support.v7.widget.aw.<init>(Unknown Source)
at android.support.v7.app.be.a(Unknown Source)
at android.support.v7.app.ap.onCreateView(Unknown Source)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:776)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:734)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:865)
02-12 08:32:53.607 22228-22228/? E/AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:828)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:873)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:828)
at android.view.LayoutInflater.inflate(LayoutInflater.java:525)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.support.design.internal.d.b(Unknown Source)
at android.support.design.widget.NavigationView.<init>(Unknown Source)
at android.support.design.widget.NavigationView.<init>(Unknown Source)
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
at android.view.LayoutInflater.createView(LayoutInflater.java:652)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:794)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:734)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:865)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:828)
at android.view.LayoutInflater.inflate(LayoutInflater.java:525)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:378)
at android.support.v7.app.ap.b(Unknown Source)
at android.support.v7.app.z.setContentView(Unknown Source)
at com.example.user.matelacc.MenuActivity.onCreate(Unknown Source)
at android.app.Activity.performCreate(Activity.java:6955)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1126)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2927)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3045)
at android.app.ActivityThread.-wrap14(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1642)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386)