は私がしている必要なすべての権限を、使用しているカメラサービス

Question

を接続することはできません。 Logcatエラー：以下に提供ソリューションのための

Cannot connect camera service 

Logcat、

FATAL EXCEPTION: main 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime: Process: pop.lock.com.frocam, PID: 4090 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime: java.lang.IllegalStateException: Could not execute method of the activity 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.view.View$1.onClick(View.java:3848) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.view.View.performClick(View.java:4463) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.view.View$PerformClick.run(View.java:18770) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.os.Handler.handleCallback(Handler.java:808) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.os.Handler.dispatchMessage(Handler.java:103) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.os.Looper.loop(Looper.java:193) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.app.ActivityThread.main(ActivityThread.java:5333) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at java.lang.reflect.Method.invokeNative(Native Method) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at java.lang.reflect.Method.invoke(Method.java:515) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:828) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:644) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at dalvik.system.NativeStart.main(Native Method) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime: Caused by: java.lang.reflect.InvocationTargetException 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at java.lang.reflect.Method.invokeNative(Native Method) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at java.lang.reflect.Method.invoke(Method.java:515) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.view.View$1.onClick(View.java:3843) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.view.View.performClick(View.java:4463)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.view.View$PerformClick.run(View.java:18770)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.os.Handler.handleCallback(Handler.java:808)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.os.Handler.dispatchMessage(Handler.java:103)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.os.Looper.loop(Looper.java:193)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.app.ActivityThread.main(ActivityThread.java:5333)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at java.lang.reflect.Method.invokeNative(Native Method)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at java.lang.reflect.Method.invoke(Method.java:515)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:828)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:644)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at dalvik.system.NativeStart.main(Native Method)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime: Caused by: java.lang.NullPointerException 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at pop.lock.com.frocam.FrontCamActivity.onClick(FrontCamActivity.java:41) 
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at java.lang.reflect.Method.invokeNative(Native Method)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at java.lang.reflect.Method.invoke(Method.java:515)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.view.View$1.onClick(View.java:3843)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.view.View.performClick(View.java:4463)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.view.View$PerformClick.run(View.java:18770)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.os.Handler.handleCallback(Handler.java:808)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.os.Handler.dispatchMessage(Handler.java:103)  
04-07 16:25:40.935 4090-4090/? E/AndroidRuntime:  at android.os.Looper.loop(Looper.java:193)  

私は、アプリケーションを実行するために私4.4.2キットカットHTCの816グラムの携帯電話を使用して、compilesdkversion 23を使用しています。カメラサービスに関連するコードは実行されません。

Answer 1

下記のアップデートコードを試してください。

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" > 
    <FrameLayout 
     android:id="@+id/camPreview" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_centerHorizontal="true" 
     android:layout_centerVertical="true" > 
    </FrameLayout> 
</RelativeLayout> 

MainActivity.java

public class MainActivity extends Activity { 
     private Camera mCam; 
     private MirrorView mCamPreview; 
     private int mCameraId = 0; 
     private FrameLayout mPreviewLayout; 

     @Override 
     public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_main); 

      mCameraId = findFirstFrontFacingCamera(); 

      mPreviewLayout = (FrameLayout) findViewById(R.id.camPreview); 
      mPreviewLayout.removeAllViews(); 

      startCameraInLayout(mPreviewLayout, mCameraId); 

     } 
     private int findFirstFrontFacingCamera() { 
      int foundId = -1; 
      int numCams = Camera.getNumberOfCameras(); 
      for (int camId = 0; camId < numCams; camId++) { 
       CameraInfo info = new CameraInfo(); 
       Camera.getCameraInfo(camId, info); 
       if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 
        foundId = camId; 
        break; 
       } 
      } 
      return foundId; 
     } 

     private void startCameraInLayout(FrameLayout layout, int cameraId) { 
      mCam = Camera.open(cameraId); 
      if (mCam != null) { 
       mCamPreview = new MirrorView(this, mCam); 
       layout.addView(mCamPreview); 
      } 
     } 


     public class MirrorView extends SurfaceView implements 
     SurfaceHolder.Callback { 
    private SurfaceHolder mHolder; 
    private Camera mCamera; 

    public MirrorView(Context context, Camera camera) { 
     super(context); 
     mCamera = camera; 
     mHolder = getHolder(); 
     mHolder.addCallback(this); 
     mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
    } 

    public void surfaceCreated(SurfaceHolder holder) { 
     try { 
      mCamera.setPreviewDisplay(holder); 
      mCamera.startPreview(); 
     } catch (Exception error) { 

     } 
    } 

    public void surfaceDestroyed(SurfaceHolder holder) { 
    } 

    public void surfaceChanged(SurfaceHolder holder, int format, int w, 
      int h) { 
     if (mHolder.getSurface() == null) { 
      return; 
     } 

     // can't make changes while mPreviewLayout is active 
     try { 
      mCamera.stopPreview(); 
     } catch (Exception e) { 

     } 

     try { 

      // start up the mPreviewLayout 
      mCamera.setPreviewDisplay(mHolder); 
      mCamera.startPreview(); 

     } catch (Exception error) { 

     } 
    } 
    } 
} 

のAndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.camera.frtex" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk android:minSdkVersion="15" /> 
    <uses-permission android:name="android.permission.CAMERA"/> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 

    <application 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" > 
     <activity 
      android:name=".MainActivity" 
      android:label="@string/app_name" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

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