Android Studio - （zxing）W/CameraBase：连接到相机时发生错误：0

有一个类似的问题，但我没有找到解决方案。我正在使用Android Studio，并且此错误发生在所有手机上。Android Studio - （zxing）W/CameraBase：连接到相机时发生错误：0

我有一个应用程序正在使用相机扫描qrcode。应用程序是这样工作的，首先当我打开应用程序相机工作顺利，它是扫描qrcode当它扫描qrcode我看到结果另一个活动后，此点有一个按钮扫描另一个qrcode这个按钮去预览活动在这一点相机看起来是黑色的。

完整注销是;

02-12 11:23:11.387 25722-25722/? E/Zygote: MountEmulatedStorage() 
02-12 11:23:11.387 25722-25722/? E/Zygote: v2 
02-12 11:23:11.387 25722-25722/? I/libpersona: KNOX_SDCARD checking this for 10459 
02-12 11:23:11.387 25722-25722/? I/libpersona: KNOX_SDCARD not a persona 
02-12 11:23:11.412 25722-25722/? I/SELinux: Function: selinux_compare_spd_ram, SPD-policy is existed. and_ver=SEPF_SM-N9000Q_5.0 ver=27 
02-12 11:23:11.412 25722-25722/? I/SELinux: Function: selinux_compare_spd_ram , priority [1] , priority version is VE=SEPF_SM-N9000Q_5.0_0027 
02-12 11:23:11.417 25722-25722/? E/SELinux: [DEBUG] get_category: variable seinfo: default sensitivity: NULL, cateogry: NULL 
02-12 11:23:11.417 25722-25722/? I/art: Late-enabling -Xcheck:jni 
02-12 11:23:11.452 25722-25722/? D/TimaKeyStoreProvider: TimaSignature is unavailable 
02-12 11:23:11.452 25722-25722/? D/ActivityThread: Added TimaKeyStore provider 
02-12 11:23:11.497 25722-25722/com.molekul.cografiisaretler D/ResourcesManager: creating new AssetManager and set to /data/app/com.molekul.cografiisaretler-1/base.apk 
02-12 11:23:11.697 25722-25722/com.molekul.cografiisaretler V/BitmapFactory: DecodeImagePath(decodeResourceStream3) : res/drawable-xxhdpi-v4/abc_ic_ab_back_mtrl_am_alpha.png 
02-12 11:23:11.717 25722-25722/com.molekul.cografiisaretler E/onCreate: onCreate 
02-12 11:23:11.732 25722-25722/com.molekul.cografiisaretler D/Activity: performCreate Call secproduct feature valuefalse 
02-12 11:23:11.732 25722-25722/com.molekul.cografiisaretler D/Activity: performCreate Call debug elastic valuetrue 
02-12 11:23:11.787 25722-25798/com.molekul.cografiisaretler D/OpenGLRenderer: Render dirty regions requested: true 
02-12 11:23:11.792 25722-25722/com.molekul.cografiisaretler D/Atlas: Validating map... 
02-12 11:23:11.827 25722-25798/com.molekul.cografiisaretler I/OpenGLRenderer: Initialized EGL, version 1.4 
02-12 11:23:11.837 25722-25798/com.molekul.cografiisaretler I/OpenGLRenderer: HWUI protection enabled for context , &this =0xaeb22088 ,&mEglDisplay = 1 , &mEglConfig = -1363909708 
02-12 11:23:11.857 25722-25798/com.molekul.cografiisaretler D/OpenGLRenderer: Enabling debug mode 0 
02-12 11:23:12.572 25722-25722/com.molekul.cografiisaretler I/Choreographer: Skipped 45 frames! The application may be doing too much work on its main thread. 
02-12 11:23:13.137 25722-25722/com.molekul.cografiisaretler I/Timeline: Timeline: Activity_idle id: [email protected] time:14318576 
02-12 11:23:16.747 25722-25722/com.molekul.cografiisaretler W/CameraBase: An error occurred while connecting to camera: 0 
02-12 11:23:16.897 25722-25722/com.molekul.cografiisaretler I/Timeline: Timeline: Activity_idle id: [email protected] time:14322338 
02-12 11:23:25.507 25722-25722/com.molekul.cografiisaretler E/SONUC: 18838813 
02-12 11:23:25.507 25722-25722/com.molekul.cografiisaretler E/SONUC: UPC_E 
02-12 11:23:25.507 25722-25722/com.molekul.cografiisaretler I/Timeline: Timeline: Activity_launch_request id:com.molekul.cografiisaretler time:14330949 
02-12 11:23:25.547 25722-25722/com.molekul.cografiisaretler V/BitmapFactory: DecodeImagePath(decodeResourceStream3) : res/drawable-xxhdpi-v4/abc_ic_ab_back_mtrl_am_alpha.png 
02-12 11:23:25.552 25722-25722/com.molekul.cografiisaretler E/onCreate: onCreate 
02-12 11:23:25.577 25722-25722/com.molekul.cografiisaretler V/BitmapFactory: DecodeImagePath(decodeResourceStream3) : res/drawable/cross64.png 
02-12 11:23:25.582 25722-25722/com.molekul.cografiisaretler D/Activity: performCreate Call secproduct feature valuefalse 
02-12 11:23:25.582 25722-25722/com.molekul.cografiisaretler D/Activity: performCreate Call debug elastic valuetrue 
02-12 11:23:25.592 25722-25722/com.molekul.cografiisaretler W/CameraBase: An error occurred while connecting to camera: 0 
02-12 11:23:26.077 25722-25722/com.molekul.cografiisaretler I/Timeline: Timeline: Activity_idle id: [email protected] time:14331515 
02-12 11:23:26.087 25722-25722/com.molekul.cografiisaretler V/ActivityThread: updateVisibility : ActivityRecord{2d9f8043 [email protected] {com.molekul.cografiisaretler/com.molekul.cografiisaretler.MainActivity}} show : false 
02-12 11:23:26.632 25722-25722/com.molekul.cografiisaretler D/ViewRootImpl: ViewPostImeInputStage ACTION_DOWN 
02-12 11:23:26.797 25722-25722/com.molekul.cografiisaretler I/Timeline: Timeline: Activity_launch_request id:com.molekul.cografiisaretler time:14332236 
02-12 11:23:26.827 25722-25722/com.molekul.cografiisaretler E/onCreate: onCreate 
02-12 11:23:26.827 25722-25722/com.molekul.cografiisaretler D/Activity: performCreate Call secproduct feature valuefalse 
02-12 11:23:26.827 25722-25722/com.molekul.cografiisaretler D/Activity: performCreate Call debug elastic valuetrue 
02-12 11:23:26.832 25722-25722/com.molekul.cografiisaretler W/CameraBase: An error occurred while connecting to camera: 0 
02-12 11:23:26.962 25722-25798/com.molekul.cografiisaretler D/OpenGLRenderer: endAllStagingAnimators on 0x9c50ce00 (RippleDrawable) with handle 0xaeb17430 
02-12 11:23:27.002 25722-25722/com.molekul.cografiisaretler I/Timeline: Timeline: Activity_idle id: [email protected] time:14332441 
02-12 11:23:27.387 25722-25722/com.molekul.cografiisaretler V/ActivityThread: updateVisibility : ActivityRecord{163c736d [email protected] {com.molekul.cografiisaretler/com.molekul.cografiisaretler.informationActivity}} show : false

主要活动;

public class MainActivity extends AppCompatActivity implements ZXingScannerView.ResultHandler{ 


    private ZXingScannerView mScannerView; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     Log.e("onCreate", "onCreate"); 
     mScannerView = new ZXingScannerView(this); 
     setContentView(mScannerView); 

    } 

    @Override 
    public void onResume() { 
     super.onResume(); 

      mScannerView.setResultHandler(this); 
      mScannerView.startCamera(); 

    } 


    @Override 
    public void handleResult(Result rawResult) { 

     Log.e("SONUC", rawResult.getText()); 
     Log.e("SONUC", rawResult.getBarcodeFormat().toString()); 


     Intent intent = new Intent(MainActivity.this, informationActivity.class); 
     startActivity(intent); 

    } 
}

信息活动;

public class informationActivity extends MainActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_information); 


    } 
    public void yenidenTara(View view){ 

     Intent intent = new Intent(informationActivity.this, MainActivity.class); 
     startActivity(intent); 

    } 

}

来源

2016-02-12 Ibrahim BOLAT

哪里是打开/关闭“摄像头”的代码？ – Shark

你能不能请份额清单文件 – Ajinkya

我共享清单文件@Ajinkya –

对不起！我的错，这是在MainActivity

public class MainActivity extends AppCompatActivity implements ZXingScannerView.ResultHandler{ 

     Integer response = 0 ; 

     private ZXingScannerView mScannerView; 
     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_main); 
      Log.e("onCreate", "onCreate"); 
      mScannerView = new ZXingScannerView(this); 
      setContentView(mScannerView); 

     } 

     @Override 
     public void onResume() { 
      super.onResume(); 

      if(response == 1) { 
       mScannerView = null; 
       mScannerView = new ZXingScannerView(this); 
       setContentView(mScannerView); 
       response = 0; 

      } 

       mScannerView.setResultHandler(this); 
       mScannerView.startCamera(); 

     } 

     @Override 
     public void onDestroy() { 
      super.onDestroy(); 

      mScannerView = null; 
      mScannerView.stopCamera(); 

     } 


     @Override 
     public void handleResult(Result rawResult) { 

      Log.e("SONUC", rawResult.getText()); 
      Log.e("SONUC", rawResult.getBarcodeFormat().toString()); 


      Intent intent = new Intent(MainActivity.this, informationActivity.class); 
      startActivity(intent); 

     } 
    }

AndroidManifest

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.molekul.xx"> 

    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="android.permission.CAMERA" /> 

    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 
     <activity android:name=".MainActivity"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 

     <activity 
      android:name="com.molekul.xx.informationActivity" 
      android:label="@string/app_name" 
      android:parentActivityName=".MainActivity"> 
     </activity> 

    </application> 

</manifest>

来源

2016-02-12 09:52:53

@Override 
    public void onDestroy() { 
     super.onDestroy(); 

     mScannerView = null; 
     mScannerView.stopCamera(); 

    }

首先你要变空，然后尝试调用方法就可以了。它可能会导致NullPointerException，并且也无法保证stopCamera（）被调用。因此，对相机硬件的下一个请求可能会卡住，导致以前的客户端还没有发布相机。首先尝试切换卡列斯的地方

来源

2016-02-12 09:58:23 VanKhulup

所以你是什么意思。我不明白 –

'CameraBase：连接到相机时发生错误：0'通常意味着另一个进程占用了相机硬件。在你的情况下，可能在第一次使用相机之后，你并没有调用stopCamera（），因为你在调用stop（）之前使你的'mScannerView'为null。 – VanKhulup

在停止摄像头之后，您应该将mScannerView = null，否则它会崩溃。 – Nando

您应该确保您的应用程序请求/启用了适当的权限这里提到W/CameraBase﹕ An error occurred while connecting to camera: 0

我面临同样的问题，直到我在设置中启用许可>应用程序> YourApp>权限

来源

2016-05-10 15:17:14 Nando

Android Studio - （zxing）W/CameraBase：连接到相机时发生错误：0

回答

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