CameraX未正确初始化。需要调用CameraX.initialize()或CameraXConfig.Provider

Question

根据发布说明(https://developer.android.com/jetpack/androidx/releases/camera#camera-core-1.0.0-alpha07)，我正在使用新的camerax (2019年12月04 )，并看到一个CameraX未初始化的错误。我的测试手机是Nokia5，以前使用的是CameraX依赖的旧版本。我希望能在getInstance()方法中帮助我通过这个错误来指导我。

相似问题java.lang.IllegalStateException: CameraX not initialized yet

cameraProviderFuture =ProcessCameraProvider.getInstance(此)；

在这里崩溃

    cameraProviderFuture.addListener(() -> {
        try {
            ProcessCameraProvider cameraProvider = (ProcessCameraProvider) cameraProviderFuture.get();
            bindPreview(cameraProvider);
        } catch (ExecutionException | InterruptedException e) {
            e.printStackTrace();
        }
    }, ContextCompat.getMainExecutor(this));

异常如下所示：

Ldalvik/system/CloseGuard;->open(Ljava/lang/String;)V (light，reflection)访问隐藏方法Ldalvik/system/CloseGuard；ComponentInfo{com.example.camx/com.example.camx.CameraActivity}：->warnIfOpen()V (轻型灰列表，反射) D/CameraActivity: onCreate: D/AndroidRuntime:关闭VM E/AndroidRuntime:致命异常:主进程: com.example.camx，PID: 26631 java.lang.RuntimeException:无法启动活动onCreate java.lang.IllegalStateException: CameraX未正确初始化。要么需要调用CameraX.initialize()，要么CameraXConfig.Provider接口必须由应用程序类实现。在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2928) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3063) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1823)在android.os.Handler.dispatchMessage(Handler.java:107) at android.os.Looper.loop(Looper.java:198)在android.app.ActivityThread.main(ActivityThread.java:6729) at java.lang.reflect.Method.invoke(本地方法)在com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit。由: java.lang.IllegalStateException: CameraX引起的main(CameraX)未正确初始化。要么需要调用CameraX.initialize()，要么CameraXConfig.Provider接口必须由应用程序类实现。在androidx.camera.core.CameraX.getOrCreateInstance(CameraX.java:797) at androidx.camera.lifecycle.ProcessCameraProvider.getInstance(ProcessCameraProvider.java:98) at com.example.camx.CameraActivity.onCreate(CameraActivity.java:92) at android.app.Activity.performCreate(Activity.java:7136) at android.app.Activity.performCreate(Activity.java:7127) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1272)在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2908) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3063)在android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)在android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)在android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1823)在android.os.Handler.dispatchMessage(Handler.java:107) at android.os.Looper.loop(Looper.java:198)在android.app.ActivityThread.main(ActivityThread.java:6729)在java.lang.reflect.Method.invoke(原生方法)在com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)的I/Process:发送信号。PID: 26631 SIG: 9进程26631终止。

级依赖关系：

def camerax_version = "1.0.0-alpha07"
implementation "androidx.camera:camera-core:$camerax_version"
implementation "androidx.camera:camera-camera2:$camerax_version"
implementation "androidx.camera:camera-view:1.0.0-alpha04"
implementation "androidx.camera:camera-lifecycle:1.0.0-alpha01"

Answer 1

参考资料：https://developer.android.com/jetpack/androidx/releases/camera#camera-camera2-1.0.0-alpha07

正如CameraX参考中所提到的，开发人员应该在应用程序类中实现CameraXConfig.Provider

CameraX初始化已更改。应用程序应该实现CameraXConfig.Provider，并使用androidx.camera.camera2提供的默认Camera2Config。

import androidx.camera.camera2.Camera2Config
import androidx.camera.core.CameraXConfig

public class MyCameraXApplication : Application(),  CameraXConfig.Provider {
    override fun getCameraXConfig(): CameraXConfig {
            return Camera2Config.defaultConfig(this)
    }
}