Android：应用程序启动时，代码扫描程序崩溃

我正在尝试编写一个简单的代码扫描应用程序。我在YouTube上找到了这个[视频][1]，解释得很好。我已经完全完成了视频中的内容，但当我编译时，应用程序崩溃了。我试图在谷歌上找到错误，但我没有解决办法。我几乎没有试过像这样的东西

File -> Invalidate Cache and restart

但仍然不起作用

我是android新手。你能帮我做这个吗

这是我的

build.gradle

：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.noums.qrcodereader"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'android.arch.navigation:navigation-fragment:1.0.0-alpha06'
    implementation 'android.arch.navigation:navigation-ui:1.0.0-alpha06'
    implementation 'com.android.support:design:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

    implementation 'com.google.android.gms:play-services:12.0.1'
}

在build.gradle文件中，我有以下错误： [！[在此处输入图像描述][2][2] 这是我的跑步记录：

  10/13 02:51:52: Launching app
$ adb install-multiple -r -t /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split-apk/debug/dep/dependencies.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split-apk/debug/slices/slice_5.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split-apk/debug/slices/slice_6.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split-apk/debug/slices/slice_0.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split-apk/debug/slices/slice_1.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split-apk/debug/slices/slice_4.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split-apk/debug/slices/slice_3.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split-apk/debug/slices/slice_2.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split-apk/debug/slices/slice_8.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split-apk/debug/slices/slice_7.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split-apk/debug/slices/slice_9.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/resources/instant-run/debug/resources-debug.apk /home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/instant-run-apk/debug/app-debug.apk 
Split APKs installed in 4 s 491 ms
$ adb shell am start -n "com.noums.qrcodereader/com.noums.qrcodereader.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Client not ready yet..Waiting for process to come online
Connected to process 31525 on device oneplus-oneplus_a5010-d3691788
Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
I/zygote64: Late-enabling -Xcheck:jni
I/zygote64: The ClassLoaderContext is a special shared library.
I/FirebaseInitProvider: FirebaseApp initialization unsuccessful
I/InstantRun: starting instant run server: is main process
I/zygote64: Rejecting re-init on previously-failed class java.lang.Class<android.support.v4.view.ViewCompat$OnUnhandledKeyEventListenerWrapper>: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;
        at void android.support.v4.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, android.support.v4.view.OnApplyWindowInsetsListener) (ViewCompat.java:2203)
        at android.view.ViewGroup android.support.v7.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void android.support.v7.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void android.support.v7.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:140)
        at void com.noums.qrcodereader.MainActivity.onCreate(android.os.Bundle) (MainActivity.java:33)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7041)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7032)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1231)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2864)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2989)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1688)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:164)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6753)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:482)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:807)
    Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.View$OnUnhandledKeyEventListener" on path: DexPathList[[zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/base.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_dependencies_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_resources_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_0_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_1_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_2_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_3_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_4_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_5_apk.apk", zip file "/data/app/com.noums.qrcode
        at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:125)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
        at void android.support.v4.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, android.support.v4.view.OnApplyWindowInsetsListener) (ViewCompat.java:2203)
        at android.view.ViewGroup android.support.v7.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void android.support.v7.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void android.support.v7.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:140)
        at void com.noums.qrcodereader.MainActivity.onCreate(android.os.Bundle) (MainActivity.java:33)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7041)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7032)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1231)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2864)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2989)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1688)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:164)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6753)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:482)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:807)
    Rejecting re-init on previously-failed class java.lang.Class<android.support.v4.view.ViewCompat$OnUnhandledKeyEventListenerWrapper>: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;
        at void android.support.v4.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, android.support.v4.view.OnApplyWindowInsetsListener) (ViewCompat.java:2203)
        at android.view.ViewGroup android.support.v7.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void android.support.v7.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void android.support.v7.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:140)
        at void com.noums.qrcodereader.MainActivity.onCreate(android.os.Bundle) (MainActivity.java:33)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7041)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7032)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1231)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2864)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2989)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1688)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:164)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6753)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:482)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:807)
    Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.View$OnUnhandledKeyEventListener" on path: DexPathList[[zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/base.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_dependencies_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_resources_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_0_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_1_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_2_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_3_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_4_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_5_apk.apk", zip file "/data/app/com.noums.qrcode
        at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:125)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
        at void android.support.v4.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, android.support.v4.view.OnApplyWindowInsetsListener) (ViewCompat.java:2203)
        at android.view.ViewGroup android.support.v7.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void android.support.v7.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void android.support.v7.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:140)
        at void com.noums.qrcodereader.MainActivity.onCreate(android.os.Bundle) (MainActivity.java:33)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7041)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7032)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1231)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2864)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2989)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1688)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:164)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6753)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:482)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:807)
    Rejecting re-init on previously-failed class java.lang.Class<android.support.v4.view.ViewCompat$OnUnhandledKeyEventListenerWrapper>: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;
        at void android.support.v4.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, android.support.v4.view.OnApplyWindowInsetsListener) (ViewCompat.java:2203)
        at android.view.ViewGroup android.support.v7.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void android.support.v7.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void android.support.v7.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:140)
        at void com.noums.qrcodereader.MainActivity.onCreate(android.os.Bundle) (MainActivity.java:33)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7041)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7032)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1231)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2864)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2989)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1688)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:164)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6753)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:482)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:807)
    Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.View$OnUnhandledKeyEventListener" on path: DexPathList[[zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/base.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_dependencies_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_resources_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_0_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_1_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_2_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_3_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_4_apk.apk", zip file "/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_5_apk.apk", zip file "/data/app/com.noums.qrcode
        at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:125)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
        at void android.support.v4.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, android.support.v4.view.OnApplyWindowInsetsListener) (ViewCompat.java:2203)
        at android.view.ViewGroup android.support.v7.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void android.support.v7.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void android.support.v7.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:140)
        at void com.noums.qrcodereader.MainActivity.onCreate(android.os.Bundle) (MainActivity.java:33)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7041)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7032)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1231)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2864)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2989)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1688)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:164)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6753)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:482)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:807)
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.noums.qrcodereader, PID: 31525
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.noums.qrcodereader/com.noums.qrcodereader.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2911)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2989)
        at android.app.ActivityThread.-wrap11(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6753)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
        at com.noums.qrcodereader.MainActivity.onCreate(MainActivity.java:50)
        at android.app.Activity.performCreate(Activity.java:7041)
        at android.app.Activity.performCreate(Activity.java:7032)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1231)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2864)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2989) 
        at android.app.ActivityThread.-wrap11(Unknown Source:0) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:164) 
        at android.app.ActivityThread.main(ActivityThread.java:6753) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807) 
W/OPDiagnose: getService:OPDiagnoseService NULL
D/OSTracker: OS Event: crash
D/AbstractTracker: Event success
Application terminated.

10/13 02:51:52:启动应用程序
$adb安装多个-r-t/home/user/AndroidStudioProjects/QRcodeReader/app/build/mediates/split apk/debug/dep/dependencies.apk/home/user/AndroidStudioProjects/QRcodeReader/build/mediates/split apk/debug/slices/slice_5.apk/home/user/AndroidStudioProjects/QRcodeReader/app/build/mediates/split apk/debug/slices/slice_6.apk/home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split apk/debug/slices/slice_0.apk/home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split apk/debug/slices/slice_1.apk/home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split apk/debug/slices/slice/slice_4.apk/home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split apk/debug/slices/slice_3.apk/home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split apk/debug/slices/slice_2.apk/home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split apk/debug/slices/slice/slice_8.apk/home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split apk/debug/slices/slice_7.apk/home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/split apk/debug/slices/slice_9.apk/home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/resources/instant run/debug/resources-debug.apk/home/user/AndroidStudioProjects/QRcodeReader/app/build/intermediates/instant run apk/debug/app-debug.apk
安装在4 s 491 ms中的分离式APK
$adb shell am start-n“com.noums.qrcodereader/com.noums.qrcodereader.MainActivity”-一个android.intent.action.MAIN-c android.intent.category.LAUNCHER
客户端尚未就绪..正在等待进程联机
连接至装置oneplus-oneplus_a5010-d3691788上的过程31525
从应用程序捕获和显示logcat消息。可以在“调试器”设置页面的“Logcat输出”部分禁用此行为。
I/zygote64:延迟启用-Xcheck:jni
I/zygote64:ClassLoaderContext是一个特殊的共享库。
I/FirebaseInitProvider:FirebaseApp初始化失败
I/InstantRun:启动即时运行服务器：是主进程
I/zygote64:拒绝对以前失败的类java.lang.class:java.lang.NoClassDefFoundError:解析失败：Landroid/view/view$OnUnhandledKeyEventListener；
在void android.support.v4.view.ViewCompat.setonapplyWindowInsertsListener（android.view.view，android.support.v4.view.onapplyWindowInsertsListener）（ViewCompat.java:2203）
在android.view.ViewGroup android.support.v7.app.AppCompateDelegateImpl.createSubDecor（）上（AppCompateDelegateImpl.java:637）
在void android.support.v7.app.AppCompateDelegateImpl.ensureSubDecor（）上（AppCompateDelegateImpl.java:518）
在void android.support.v7.app.AppCompateDelegateImpl.setContentView（int）（AppCompateDelegateImpl.java:466）中
位于void android.support.v7.app.AppCompatActivity.setContentView（int）（AppCompatActivity.java:140）
位于void com.noums.qrcodereader.MainActivity.onCreate（android.os.Bundle）（MainActivity.java:33）
在void android.app.Activity.performCreate（android.os.Bundle、android.os.PersistableBundle）（Activity.java:7041）中
位于void android.app.Activity.performCreate（android.os.Bundle）（Activity.java:7032）
位于void android.app.Instrumentation.callActivityOnCreate（android.app.Activity，android.os.Bundle）（Instrumentation.java:1231）
在android.app.Activity android.app.ActivityThread.performLaunchActivity（android.app.ActivityThread$ActivityClientRecord，android.content.Intent）（ActivityThread.java:2864）
在void android.app.ActivityThread.handleLaunchActivity（android.app.ActivityThread$ActivityClientRecord，android.content.Intent，java.lang.String）（ActivityThread.java:2989）
在void android.app.ActivityThread.-wrap11（android.app.ActivityThread，android.app.ActivityThread$ActivityClientRecord，android.content.Intent，java.lang.String）（ActivityThread.java:-1）
在void android.app.ActivityThread$H.handleMessage（android.os.Message）（ActivityThread.java:1688）中
在void android.os.Handler.dispatchMessage（android.os.Message）（Handler.java:106）中
位于void android.os.Looper.loop（）（Looper.java:164）
在void android.app.ActivityThread.main（java.lang.String[]）（ActivityThread.java:6753）上
位于java.lang.Object java.lang.reflect.Method.invoke（java.lang.Object，java.lang.Object[]）（Method.java:-2）
位于void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run（）（RuntimeInit.java:482）
位于void com.android.internal.os.ZygoteInit.main（java.lang.String[]）（ZygoteInit.java:807）
原因：java.lang.ClassNotFoundException:在路径：DexPathList[[zip文件”/data/app/com.noums.qrcodereader-9OQDGKRKRW2VVVGY\u xxtA=/base.apk]，zip文件/data/app/com.noums.qrcodereader-9OQDGKRKRKRW2VVGY\u xxtA=/split\lib\u dependencies\u apk.zip文件中未找到类“android.view.view.view$OnUnhandledKeyEventListener”“/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy\u xxtA=/split\u lib\u resources\u apk.apk”，zip文件/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy\u xxtA=/split\u lib\u slice\u 0\u apk.apk”，zip文件“/data/app/com.noums.qrcodereader-9oqrdgkrhlkrw2vvgy\u xxtA=/split\u slice\u slice\u apk”/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_lib_slice_2_apk.apk”，zip文件“/data/app/com.noums.qrcodereader-9oqdGKRhlKrW2VVgy_xxtA==/split_l
 Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
    at com.noums.qrcodereader.MainActivity.onCreate(MainActivity.java:50)