我正在嘗試爲我的Android應用程序獲取已簽名的APK。當我通過Android工作室安裝它時,該應用完美運行,但是當我生成簽名的APK並使用該APK安裝應用時,我得到以下異常。任何想法可能會發生什麼?Android - 使用已簽名的APK時應用程序崩潰
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)
這是gradle這個build文件看起來像什麼
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'
}
你可以發佈MenuActivity嗎? – Raghavendra
它是一個龐大的類,讓我把它上傳到其他網站,並在這裏添加鏈接 – anonymous123
我認爲這不是關於APK。檢查您是否沒有訪問Shared Preferences中的任何內容,這些內容在卸載時沒有得到,並使用簽名的apk重新安裝應用程序。 – DsD