遇到了好多异常，逐一介绍解决方案如下。
java.lang.RuntimeException: autoFocus failed at android.hardware.Camera.native_autoFocus
autoFocus 时机不对导致的Crash，异常信息:
java.lang.RuntimeException: autoFocus failed at android.hardware.Camera.native_autoFocus
得到的用户反馈描述：
Sony s39h 一点拍摄视频就crash，从他们上传上来的log看是autoFocus的时候crash了，找了下资料，这个比较接近：Android Camera.autoFocus() failed
参考上面的文章在我们的代码中发现了一个调用时机不对的autoFocus()，去掉，搞定。
java.lang.RuntimeException: startPreview failed
老的系统版本需要调用SurfaceView的 setType，异常信息：
06-19 21:25:28.730: E/AndroidRuntime(1082): FATAL EXCEPTION: main
06-19 21:25:28.730: E/AndroidRuntime(1082): java.lang.RuntimeException: startPreview failed
06-19 21:25:28.730: E/AndroidRuntime(1082): at android.hardware.Camera.startPreview(Native Method)
06-19 21:25:28.730: E/AndroidRuntime(1082): at com.duowan.huanjuwan.app.truthordare.MediaActivity$1.surfaceChanged(MediaActivity.java:413)
解决方案
只需要加上setType这个修改就可以了，但是代码加的位置有讲究，要在getHolder().addCallback之后加才可以
getHolder().addCallback(this);
getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
心路历程
解决问题的过程比结果更优价值 :)
搜索到描述最接近的一文章：
Android Camera will not work. startPreview fails
试了下里面的代码，没有解决
其他的参考文章：
Issue 7909:Camera preview does not work on HTC Desire
java.lang.RuntimeException: startPreview failed
再试下这个：
#34 paul.won...@gmail.com
Hi everyone,
I'm new to Android but encountered the same problem. Could it be the case that the width and height parameters are not called properly? I added the following two lines before parameters.setPreviewSize and it now seems to work fine.
w = parameters.getPreviewSize().width;
h = parameters.getPreviewSize().height;
For the record, I am using a HTC Desire too.
Cheers,
Paul
还是不行
尝试下用Demo来调试
Demo加了两个地方，成功跑起来了，要看下能不能具体到只加一个就可以
@SuppressWarnings("deprecation")
public void initCameraManager(Context paramContext) {
cameraManager = ((MainActivity) paramContext).getCameraManager();
getHolder().addCallback(this);
getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
int preview_width = parameters.getPreviewSize().width;
int preview_height = parameters.getPreviewSize().height;
parameters.setPreviewSize(preview_width, preview_height);
Log.e("video", "Width: " + preview_width + ", height: " + preview_height);
//parameters.setPreviewSize(640, 480);
camera.setParameters(parameters);
确认了：只需要加上setType这个修改就可以了，比较奇怪的是我昨天在我们的产品工程加了，但还是crash了，可能是加的位置不对
getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
回我们的产品工程再验证下
果然是加的位置不对，要在getHolder().addCallback之后加才可以
getHolder().addCallback(this);
getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
java.lang.NoSuchFieldError: android.os.AsyncTask.THREAD_POOL_EXECUTOR
THREAD_POOL_EXECUTOR在Level 11后才有，需要做系统版本判断再调用，异常信息:
06-20 12:36:06.410: E/AndroidRuntime(1613): FATAL EXCEPTION: main
06-20 12:36:06.410: E/AndroidRuntime(1613): java.lang.NoSuchFieldError: android.os.AsyncTask.THREAD_POOL_EXECUTOR
06-20 12:36:06.410: E/AndroidRuntime(1613): at com.duowan.huanjuwan.app.camera.AutoFocusManager.onAutoFocus(AutoFocusManager.java:67)
06-20 12:36:06.410: E/AndroidRuntime(1613): at android.hardware.Camera$EventHandler.handleMessage(Camera.java:559)
06-20 12:36:06.410: E/AndroidRuntime(1613): at android.os.Handler.dispatchMessage(Handler.java:99)
06-20 12:36:06.410: E/AndroidRuntime(1613): at android.os.Looper.loop(Looper.java:130)
06-20 12:36:06.410: E/AndroidRuntime(1613): at android.app.ActivityThread.main(ActivityThread.java:3703)
06-20 12:36:06.410: E/AndroidRuntime(1613): at java.lang.reflect.Method.invokeNative(Native Method)
06-20 12:36:06.410: E/AndroidRuntime(1613): at java.lang.reflect.Method.invoke(Method.java:507)
06-20 12:36:06.410: E/AndroidRuntime(1613): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
06-20 12:36:06.410: E/AndroidRuntime(1613): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
06-20 12:36:06.410: E/AndroidRuntime(1613): at dalvik.system.NativeStart.main(Native Method)
参考这个文章解决了：Android 2.3.3 AsyncTask call throws NoSuchFieldError
@TargetApi(11)
static public <T> void executeAsyncTask(AsyncTask<T, ?, ?> task,
T... params) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, params);
}
else {
task.execute(params);
}
}
可以启动并预览，但是一开始录制视频，画面就卡住，没Crash
异常信息：
06-20 12:53:07.766: E/AndroidRuntime(1682): FATAL EXCEPTION: main
06-20 12:53:07.766: E/AndroidRuntime(1682): java.lang.OutOfMemoryError: bitmap size exceeds VM budget
06-20 12:53:07.766: E/AndroidRuntime(1682): at android.graphics.BitmapFactory.nativeDecodeByteArray(Native Method)
06-20 12:53:07.766: E/AndroidRuntime(1682): at android.graphics.BitmapFactory.decodeByteArray(BitmapFactory.java:419)
06-20 12:53:07.766: E/AndroidRuntime(1682): at android.graphics.BitmapFactory.decodeByteArray(BitmapFactory.java:432)
06-20 12:53:07.766: E/AndroidRuntime(1682): at com.duowan.huanjuwan.app.truthordare.MediaActivity$9.onPictureTaken(MediaActivity.java:446)
06-20 12:53:07.766: E/AndroidRuntime(1682): at android.hardware.Camera$EventHandler.handleMessage(Camera.java:529)
06-20 12:53:07.766: E/AndroidRuntime(1682): at android.os.Handler.dispatchMessage(Handler.java:99)
06-20 12:53:07.766: E/AndroidRuntime(1682): at android.os.Looper.loop(Looper.java:130)
06-20 12:53:07.766: E/AndroidRuntime(1682): at android.app.ActivityThread.main(ActivityThread.java:3703)
06-20 12:53:07.766: E/AndroidRuntime(1682): at java.lang.reflect.Method.invokeNative(Native Method)
06-20 12:53:07.766: E/AndroidRuntime(1682): at java.lang.reflect.Method.invoke(Method.java:507)
06-20 12:53:07.766: E/AndroidRuntime(1682): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
06-20 12:53:07.766: E/AndroidRuntime(1682): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
06-20 12:53:07.766: E/AndroidRuntime(1682): at dalvik.system.NativeStart.main(Native Method)
06-20 12:53:08.207: W/AutoFocusManager(1682): Unexpected exception while focusing
06-20 12:53:08.207: W/AutoFocusManager(1682): java.lang.RuntimeException: autoFocus failed
06-20 12:53:08.207: W/AutoFocusManager(1682): at android.hardware.Camera.native_autoFocus(Native Method)
06-20 12:53:08.207: W/AutoFocusManager(1682): at android.hardware.Camera.autoFocus(Camera.java:650)
06-20 12:53:08.207: W/AutoFocusManager(1682): at com.duowan.huanjuwan.app.camera.AutoFocusManager.start(AutoFocusManager.java:82)
06-20 12:53:08.207: W/AutoFocusManager(1682): at com.duowan.huanjuwan.app.camera.AutoFocusManager$AutoFocusTask.doInBackground(AutoFocusManager.java:118)
06-20 12:53:08.207: W/AutoFocusManager(1682): at android.os.AsyncTask$2.call(AsyncTask.java:185)
06-20 12:53:08.207: W/AutoFocusManager(1682): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
06-20 12:53:08.207: W/AutoFocusManager(1682): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
06-20 12:53:08.207: W/AutoFocusManager(1682): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
06-20 12:53:08.207: W/AutoFocusManager(1682): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
06-20 12:53:08.207: W/AutoFocusManager(1682): at java.lang.Thread.run(Thread.java:1019)
06-20 12:53:10.198: I/Process(1682): Sending signal. PID: 1682 SIG: 9
06-20 12:53:10.539: I/dalvikvm(1884): Could not find method android.view.Display.getSize, referenced from method com.duowan.huanjuwan.app.common.Utils.getDisplaySize
06-20 12:53:10.549: W/dalvikvm(1884): VFY: unable to resolve virtual method 7806: Landroid/view/Display;.getSize (Landroid/graphics/Point;)V
06-20 12:53:10.549: D/dalvikvm(1884): VFY: replacing opcode 0x6e at 0x0017
结论是老的机器内存不足，使用之前清理下内存就好了，这个就不是单纯一两行代码的问题，整个应用的内存使用都要Review下。
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