如何解决这个错误 VFY: unable to resolve virtual method

Question

我正在使用 android studio 2.0，上次我将 jdk 7 升级到 jdk 8，我正在对文件 gradle 进行一些更改，但现在我收到此错误

E/InstantRun: Could not find slices in APK; aborting.
I/dalvikvm: Could not find method android.content.Context.getSystemService, referenced from method com.mstr.malik.elbalaapps.ControlPanel.access$super
W/dalvikvm: VFY: unable to resolve virtual method 435: Landroid/content/Context;.getSystemService (Ljava/lang/Class;)Ljava/lang/Object;
D/dalvikvm: VFY: replacing opcode 0x6f at 0x004b
I/dalvikvm: Could not find method android.app.Activity.stopLockTask, referenced from method com.mstr.malik.elbalaapps.ControlPanel.access$super
W/dalvikvm: VFY: unable to resolve virtual method 231: Landroid/app/Activity;.stopLockTask ()V
D/dalvikvm: VFY: replacing opcode 0x6f at 0x00b9
E/dalvikvm: Could not find class 'android.os.PersistableBundle', referenced from method com.mstr.malik.elbalaapps.ControlPanel.access$super
W/dalvikvm: VFY: unable to resolve check-cast 224 (Landroid/os/PersistableBundle;) in Lcom/mstr/malik/elbalaapps/ControlPanel;
D/dalvikvm: VFY: replacing opcode 0x1f at 0x00f1
I/dalvikvm: Could not find method android.content.Context.getColorStateList, referenced from method com.mstr.malik.elbalaapps.ControlPanel.access$super
W/dalvikvm: VFY: unable to resolve virtual method 417: Landroid/content/Context;.getColorStateList (I)Landroid/content/res/ColorStateList;
D/dalvikvm: VFY: replacing opcode 0x6f at 0x0101
I/dalvikvm: Could not find method android.app.Activity.onVisibleBehindCanceled, referenced from method com.mstr.malik.elbalaapps.ControlPanel.access$super
W/dalvikvm: VFY: unable to resolve virtual method 154: Landroid/app/Activity;.onVisibleBehindCanceled ()V
D/dalvikvm: VFY: replacing opcode 0x6f at 0x0111
I/dalvikvm: Could not find method android.app.Activity.onWindowStartingActionMode, referenced from method com.mstr.malik.elbalaapps.ControlPanel.access$super
W/dalvikvm: VFY: unable to resolve virtual method 158: Landroid/app/Activity;.onWindowStartingActionMode (Landroid/view/ActionMode$Callback;I)Landroid/view/ActionMode;
D/dalvikvm: VFY: replacing opcode 0x6f at 0x0137
E/dalvikvm: Could not find class 'android.os.PersistableBundle', referenced from method com.mstr.malik.elbalaapps.ControlPanel.access$super
W/dalvikvm: VFY: unable to resolve check-cast 224 (Landroid/os/PersistableBundle;) in Lcom/mstr/malik/elbalaapps/ControlPanel;
D/dalvikvm: VFY: replacing opcode 0x1f at 0x019a

这是gradle个文件

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "24.0.0 rc3"

    defaultConfig {
        applicationId "com.mstr.malik.elbalaapps"
        minSdkVersion 18
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.3.0'
}

如何处理这个错误，我试过将编译版本'com.android.support:appcompat-v7:23.3.0'改成编译'com.android.support:appcompat-v7:23.0.0'也崩溃了，我该怎么办？提前致谢

Answer 1

如果您在运行时检查 Android 版本，您可以安全地忽略此警告。这只是意味着您引用了一种方法，该方法在您当前运行代码的平台上不可用。您只需要确保不在旧平台上使用更新的 API。通常，如果您在发布版本中做错了什么，lint 会警告您。只要记住这一点，就不必担心。

作为这种运行时开关的示例：

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    // You can use here an API which was added in Lollipop.
}

Answer 2

根据 google Android 工程师的说法，这是正常的。

参考https://code.google.com/p/android/issues/detail?id=198567

当您针对比部署设备 api 级别更高的 api 级别进行编译时，会发生这种情况。日志表明，某些方法不可用，虚拟机将用替代实现替换它们。

Br, 尼克

Answer 3

我有相同的警告，然后是致命的 NoClassDefFoundError。问题可能出自 android-plugin 的多 dex 模式下的 dex 生成文件。所有找不到的类都在一个包裹中。该包被分成 2 个 dex 文件。一种解决方案是生成 MainDexList 文件，其中我只包含未解析的类，它们已加入一个 dex 文件。有关详细信息，另请参阅 here。

如何解决这个错误 VFY: unable to resolve virtual method

How to resolve this error VFY: unable to resolve virtual method

java

android

android-appcompat

java-8