Question

我的应用程序在运行4.3的三星Galaxy S3上收到以下崩溃：

06-15 10:46:45.260 6649-6649/com.company.appname E/dalvikvm: Could not find class 'android.hardware.camera2.CameraManager', referenced from method com.company.appname.fragments.menu.MyFragment.flashLightOff
06-15 10:46:45.260 6649-6649/com.company.appname W/dalvikvm: VFY: unable to resolve check-cast 176 (Landroid/hardware/camera2/CameraManager;) in Lcom/company/appname/fragments/menu/MyFragment;
06-15 10:46:45.260 6649-6649/com.company.appname D/dalvikvm: VFY: replacing opcode 0x1f at 0x0010
06-15 10:46:45.265 6649-6649/com.company.appname W/dalvikvm: VFY: unable to resolve exception class 175 (Landroid/hardware/camera2/CameraAccessException;)
06-15 10:46:45.265 6649-6649/com.company.appname W/dalvikvm: VFY: unable to find exception handler at addr 0x1e
06-15 10:46:45.265 6649-6649/com.company.appname W/dalvikvm: VFY:  rejected Lcom/company/appname/fragments/menu/MyFragment;.flashLightOff (Landroid/view/View;)V
06-15 10:46:45.265 6649-6649/com.company.appname W/dalvikvm: VFY:  rejecting opcode 0x0d at 0x001e
06-15 10:46:45.265 6649-6649/com.company.appname W/dalvikvm: VFY:  rejected Lcom/company/appname/fragments/menu/MyFragment;.flashLightOff (Landroid/view/View;)V
06-15 10:46:45.265 6649-6649/com.company.appname W/dalvikvm: Verifier rejected class Lcom/company/appname/fragments/menu/MyFragment;
06-15 10:46:45.265 6649-6649/com.company.appname D/AndroidRuntime: Shutting down VM
06-15 10:46:45.265 6649-6649/com.company.appname W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x41d56700)
06-15 10:46:46.045 6649-6649/com.company.appname E/AndroidRuntime: FATAL EXCEPTION: main
                                                                            java.lang.VerifyError: com/company/appname/fragments/menu/MyFragment
                                                                                at com.company.appname.adapters.NavigationCollectionPagerAdapter.<init>(NavigationCollectionPagerAdapter.java:16)
                                                                                at com.company.appname.MainActivity.onCreate(MainActivity.java:84)
                                                                                at android.app.Activity.performCreate(Activity.java:5372)
                                                                                at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
                                                                                at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2257)
                                                                                at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)
                                                                                at android.app.ActivityThread.access$700(ActivityThread.java:159)
                                                                                at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
                                                                                at android.os.Handler.dispatchMessage(Handler.java:99)
                                                                                at android.os.Looper.loop(Looper.java:176)
                                                                                at android.app.ActivityThread.main(ActivityThread.java:5419)
                                                                                at java.lang.reflect.Method.invokeNative(Native Method)
                                                                                at java.lang.reflect.Method.invoke(Method.java:525)
                                                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
                                                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
                                                                                at dalvik.system.NativeStart.main(Native Method)

我的gradle使用了我认为相关的这些设置：

  android {
         compileSdkVersion 23
         buildToolsVersion "23.0.1"
          ...
     }

     ...
     dependencies {
         compile 'com.android.support:appcompat-v7:23.0.1'
         ...
     }

清单具有以下内容：

<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="23" />
<uses-permission android:name="android.permission.CAMERA" />

和罪魁祸首的方法是这样的：

import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraManager;
...
public void flashLightOff(View view) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        try {
            CameraManager manager = (CameraManager) BDApplication.getGlobalContext().getSystemService(Context.CAMERA_SERVICE);
            manager.setTorchMode(manager.getCameraIdList()[0], false);
        } catch (CameraAccessException cae) {
            Logger.logError(cae.getMessage());
            cae.printStackTrace();
        }
    }
    else {

        try {
            if (getActivity().getPackageManager().hasSystemFeature(
                    PackageManager.FEATURE_CAMERA_FLASH)) {
                cam.stopPreview();
                cam.release();
                cam = null;
            }
        } catch (Exception e) {
            e.printStackTrace();
            Logger.logError("Error turning off Flashlight", e);
        }
    }
}

当应用程序启动时发生此崩溃，特别是在创建片段时。永远不会调用此方法，从我可以阅读的所有内容（Build.VERSION.SDK_INT＆gt; = Build.VERSION_CODES.M）后卫应该防止此类崩溃，但在某些设备上似乎没有。

我可以使用有限数量的测试设备，只有使用4.3的三星Galaxy S3才会发生这种崩溃。其他设备包括带有4.4的Note 2，带有5和6的变量设备，所有设备都按预期工作。

我对我的问题所处的位置感到茫然，有人能指出我正确的方向吗？

编辑：堆栈跟踪并没有真正反映我认为是罪魁祸首，堆栈跟踪是在创建包含“Camera2”clssses的片段时，但是此时从不调用它们。我相信崩溃是由于dalvik VFY无法解决错误。

Answer 1

我已经通过将camera2类引用拉入一个新类，然后像上面那样保护它们来解决这个问题。

public void flashLightOff(View view) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        FlashLightManager.flashlightOff();
    }else
    {
        try {
            if (getActivity().getPackageManager().hasSystemFeature(
                    PackageManager.FEATURE_CAMERA_FLASH)) {
                cam.stopPreview();
                cam.release();
                cam = null;
            }
        } catch (Exception e) {
            e.printStackTrace();
            Logger.logError("Error turning off Flashlight", e);
        }
    }
}

经过一些测试后，我可能会将两者都移到“FlashLightManager”中。

Camera2 API在4.3设备上崩溃

1 个答案: