4

我正在开发一个 android 应用程序，我试图在其中实现相机功能，而不是使用意图来避免获得 android 内置相机。

我正在使用 Preview.java 来显示相机在屏幕上看到的内容。

    public void surfaceCreated(SurfaceHolder holder) {

        Mydcamera = Camera.open();

        try {

            Mydcamera.setPreviewDisplay(holder);

            Mydcamera.setPreviewCallback(new PreviewCallback() {

                public void onPreviewFrame(byte[] data, Camera arg1) {
                    FileOutputStream outStream = null;
                    try {
                        outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));  
                        outStream.write(data);
                        outStream.close();

                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    } finally {
                    }
                        Preview.this.invalidate();
                }
            });
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

但是每次我运行该应用程序时，我都会强制关闭下面的代码行

    Mydcamera = Camera.open();

错误日志：

     08-14 09:10:57.027: E/AndroidRuntime(2318): java.lang.RuntimeException: Fail to connect to camera service
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.hardware.Camera.native_setup(Native Method)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.hardware.Camera.<init>(Camera.java:294)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.hardware.Camera.open(Camera.java:271)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at com.ssn.newcamerademo.Preview.surfaceCreated(Preview.java:45)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.SurfaceView.updateWindow(SurfaceView.java:564)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.SurfaceView.updateWindow(SurfaceView.java:408)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.SurfaceView.dispatchDraw(SurfaceView.java:352)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.View.draw(View.java:6936)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.widget.FrameLayout.draw(FrameLayout.java:357)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewGroup.drawChild(ViewGroup.java:1646)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.View.draw(View.java:6936)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.widget.FrameLayout.draw(FrameLayout.java:357)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1904)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewRoot.draw(ViewRoot.java:1527)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewRoot.performTraversals(ViewRoot.java:1263)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.view.ViewRoot.handleMessage(ViewRoot.java:1865)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.os.Handler.dispatchMessage(Handler.java:99)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.os.Looper.loop(Looper.java:130)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at android.app.ActivityThread.main(ActivityThread.java:3687)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at java.lang.reflect.Method.invokeNative(Native Method)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at java.lang.reflect.Method.invoke(Method.java:507)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
     08-14 09:10:57.027: E/AndroidRuntime(2318):    at dalvik.system.NativeStart.main(Native Method)

不知道哪里出错了。请帮忙！谢谢！

4

1 回答 1

1

检查您是否在清单文件中设置了所有必需的权限。从这个链接

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />

如果这个猜测对您没有帮助，您将不得不提供更多信息，例如 logcat 信息。

于 2013-08-13T12:50:31.770 回答