java - Android拍照功能在Android 4.1.1版上失败，但在4.0.0版中成功

我得到了LogCat：

 java.lang.RuntimeException: takePicture failed
at android.hardware.Camera.native_takePicture(Native Method)
at android.hardware.Camera.takePicture(Camera.java:1061)
at android.hardware.Camera.takePicture(Camera.java:1006)
at com.cidtech.portraitcatch.service.MyService.takePic(MyService.java:168)
at com.cidtech.portraitcatch.service.MyService$1.onClick(MyService.java:78)
at android.view.View.performClick(View.java:4088)
at android.view.View$PerformClick.run(View.java:16984)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)

实际代码如下：

public void takePic(){
    home_takePic.setEnabled(false);
    camera = Camera.open();
    if(bitmapList == null){
        bitmapList = new ArrayList<Bitmap>();
    }
    for(int i=0; i<5; i++){

        camera.takePicture(null, null, new MyPictureCallback());
        SystemClock.sleep(1000);
    }

            saveBitmapToSdcard();

    releaseResource();
    home_takePic.setEnabled(true);
}

我也这样做：

public void takePic(){
    home_takePic.setEnabled(false);
    camera = Camera.open();
    ***camera.startPreview();***
    if(bitmapList == null){
        bitmapList = new ArrayList<Bitmap>();
    }
    for(int i=0; i<5; i++){

        camera.takePicture(null, null, new MyPictureCallback());
        SystemClock.sleep(1000);
    }

    //      saveBitmapToSdcard();

    releaseResource();
    home_takePic.setEnabled(true);
}

但仍然得到相同的异常

方法camera.takePicture已在版本4.0.4中执行，但在版本4.1.1中失败，谁能告诉我如何解决它，请帮助我，谢谢

最佳答案

尝试呼叫startPreview()之前，您需要先呼叫takePicture()。致电Camera.open()后执行此操作。

As per Android documentation：


  重要：调用startPreview()开始更新预览图。
  必须先开始预览，然后才能拍照。


startPreview documentation