It would be easy to repeat the problem when I use an old device, which
takes 1-2 secs to finish taking a picture.
So when I press HOME button, while the device is taking picture, often
times it freezes at the preview picture.
I have added camera stopPreview and release in onPause(), which will be
called when HOME button is pressed.
>From the LogCat, I find that the camera hardware is still processing some
information, but Activity Manager kicks in, saying something about HOME
activity.
So I think HOME forces some camera procedure finished in a bad way, which
makes the camera preview freezes, and the camera cannot be opened any more
(e.g. when I try to open the default camera, it says it cannot access to
camera)
However, if I use the default camera of the old slow device :), I cannot
repeat the crash. So it seems the default camera application might handle
it well; it might access native libraries to handle the situation, or
something else.
If I use Nexus 4 device, it is very hard to repeat this experiment.
A less powerful device is needed to repeat the experiment.
[UPDATE]
I put the Logcat at the end of the post (it is long). Here is a brief
review.
After click the capture button,
07-25 14:20:08.517: I/Camera Preview(1517): For Debug: begin
mCamera.takePicture
Then I press the HOME button, the log below shows that
android.intent.action.MAIN kicks in.
07-25 14:20:08.867: I/ActivityManager(188): Starting activity: Intent {
act=android.intent.action.MAIN cat=[android.intent.category.HOME]
flg=0x10200000 cmp=com.htc.launcher/.Launcher } from pid 188
07-25 14:20:09.337: I/Camera Preview(1517): For Debug: after
mCamera.takePicture
07-25 14:20:09.337: I/CameraActivity(1517): For Debug: in onPause();
Regarding how to process in onPause, which will be callsed by HOME button,
I tried two options.
One option is that onPause releases the camera.
Another option is,
I put Thread.sleep(1500) to let my activity has enough time to finish
something.
But with either option, the camear crashes, and cannot be launched any more.
*******************************
Long logcat:
07-25 14:20:07.736: I/Camera Preview(1517): For Debug: begin:
mCamera.autoFocus(mContinuousAutoFocusCallback);
07-25 14:20:07.736: I/Camera Preview(1517): For Debug: Unexpected
exception while doing continuous focusingjava.lang.NullPointerException
07-25 14:20:07.766: I/Camera Preview(1517): For Debug: onClick
mCamera.autoFocus and take a picture
07-25 14:20:07.766: D/CameraService(70): autoFocus (pid 1517)
07-25 14:20:07.766: D/QualcommCameraHardware(70): autoFocus E
07-25 14:20:07.766: D/QualcommCameraHardware(70): autoFocus X
07-25 14:20:07.766: D/QualcommCameraHardware(70): runAutoFocus E
07-25 14:20:07.766: D/QualcommCameraHardware(70): af start (fd 39)
07-25 14:20:07.766: I/mm-camera 8x vfe(70): ch=971 cw=1619 vof=485
hof=809 wh=485 ww=809
07-25 14:20:07.916: D/WifiStateTracker(188): Reset connections and
stopping DHCP
07-25 14:20:07.916: I/wpa_supplicant(487): Rx Data Filter Remove [5]
command
07-25 14:20:07.916: I/wpa_supplicant(487): auto ip disabled
07-25 14:20:07.916: I/wpa_supplicant(487): Rx Data Filter: do not
support, ignore
07-25 14:20:07.926: D/NetUtils(188): ifc_get_info addr=0 !
07-25 14:20:08.497: D/mm-camera af_core(70): af_beta is executing!!
07-25 14:20:08.517: D/QualcommCameraHardware(70): native_set_afmode:
ctrlCmd.status == 2
07-25 14:20:08.517: D/QualcommCameraHardware(70): af done: 0
07-25 14:20:08.517: D/CameraService(70): focus lenPos 0 status 0
macro_threshold 10
07-25 14:20:08.517: D/CameraService(70):
CameraService::Client::handleGenericNotify: msgType = CAMERA_MSG_FOCUS
07-25 14:20:08.517: D/CameraService(70):
CameraService::Client::handleGenericNotify: callback
07-25 14:20:08.517: I/Camera Preview(1517): For Debug: onClick
mCamera.autoFocus, onAutoFocus: want to know the time difference
07-25 14:20:08.517: I/Camera Preview(1517): For Debug: begin
mCamera.takePicture
07-25 14:20:08.517: D/QualcommCameraHardware(70): runAutoFocus X
07-25 14:20:08.517: D/CameraService(70): setPreviewCallbackFlag(0) (pid
1517)
07-25 14:20:08.517: D/CameraService(70): takePicture (pid 1517)
07-25 14:20:08.517: D/QualcommCameraHardware(70): takePicture(463)
07-25 14:20:08.517: D/QualcommCameraHardware(70): val_ril_status =
0,val_wimax_status = 0,val_hotspot_status = 0,val_low_temp_limit =
10.000000,val_batt_temp = 36.500000,val_low_temp_limit = 15,val_batt_cap =
79
07-25 14:20:08.517: D/QualcommCameraHardware(70): FLASHLIGHT is ENABLED
07-25 14:20:08.517: E/mm-camera-af(70): af_algo_preview: FAILED....
07-25 14:20:08.867: I/ActivityManager(188): Starting activity: Intent {
act=android.intent.action.MAIN cat=[android.intent.category.HOME]
flg=0x10200000 cmp=com.htc.launcher/.Launcher } from pid 188
07-25 14:20:08.927: D/WifiStateTracker(188): Disabling interface
07-25 14:20:08.927: W/wpa_supplicant(487): l2_packet_receive - recvfrom
07-25 14:20:08.977: D/NetSharing_NSReceiver(544): onReceive :
android.net.wifi.STATE_CHANGE
07-25 14:20:08.977: I/NetSharing_NSReceiver(544): wifienabled:false
07-25 14:20:09.267: D/QualcommCameraHardware(70): stopPreviewInternal
E: 1
07-25 14:20:09.267: D/QualcommCameraHardware(70):
cancelAutoFocusInternal E
07-25 14:20:09.267: D/QualcommCameraHardware(70):
cancelAutoFocusInternal X: 0
07-25 14:20:09.327: I/QualcommCameraHardware(70): deinitPreview E
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
32, reg = 1 buffer = 0x41121000
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
32, reg = 1 buffer = 0x41221000
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
32, reg = 1 buffer = 0x41321000
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
32, reg = 1 buffer = 0x41421000
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
35, reg = 1 buffer = 0x41521000
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
35, reg = 1 buffer = 0x41621000
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
35, reg = 1 buffer = 0x41721000
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
35, reg = 1 buffer = 0x41821000
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
35, reg = 1 buffer = 0x41921000
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
35, reg = 1 buffer = 0x41a21000
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
35, reg = 1 buffer = 0x41b21000
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
35, reg = 1 buffer = 0x41c21000
07-25 14:20:09.327: D/QualcommCameraHardware(70): frame_thread X
07-25 14:20:09.327: I/QualcommCameraHardware(70): deinitPreview X
07-25 14:20:09.327: D/QualcommCameraHardware(70): stopPreviewInternal
X: 0
07-25 14:20:09.327: D/QualcommCameraHardware(70): initRaw:
mFrameThreadWaitLock.lock()
07-25 14:20:09.327: D/QualcommCameraHardware(70): initRaw:
mFrameThreadWaitLock.unlock()
07-25 14:20:09.327: D/QualcommCameraHardware(70): initRaw E: raw
size=3264x2448
07-25 14:20:09.327: D/QualcommCameraHardware(70): initRaw: original raw
ratio = 0.750000
07-25 14:20:09.327: D/QualcommCameraHardware(70): initRaw: raw ratio =
0.750000, display size=800x480
07-25 14:20:09.327: D/QualcommCameraHardware(70): initRaw:
thumbnail_width=800, thumbnail_height=608, thumbnail_buffer_size=729600
07-25 14:20:09.327: D/QualcommCameraHardware(70): native_access_parm:
fd 15, type 1, length 32
07-25 14:20:09.327: D/mm-camera-ov8810_u(70): cam_mode_sel 0
07-25 14:20:09.327: D/QualcommCameraHardware(70): initRaw: initializing
mRawHeap.
07-25 14:20:09.327: E/MemoryHeapBase(70): error opening
/dev/pmem_camera: No such file or directory
07-25 14:20:09.327: W/QualcommCameraHardware(70): failed to construct
master heap for pmem pool /dev/pmem_camera
07-25 14:20:09.327: W/QualcommCameraHardware(70): initRaw X failed with
pmem_camera, trying with pmem_adsp
07-25 14:20:09.327: I/QualcommCameraHardware(70): pmem pool
/dev/pmem_adsp ioctl(fd = 37, PMEM_GET_SIZE) is 16777216
07-25 14:20:09.327: D/QualcommCameraHardware(70): mBufferSize=11985408,
mAlignedBufferSize=11988992
07-25 14:20:09.327: E/QualcommCameraHardware(70): num_buffers = 1
07-25 14:20:09.327: I/QualcommCameraHardware(70): register_buf: camfd =
35, reg = 0 buffer = 0x4227f000
07-25 14:20:09.327: D/QualcommCameraHardware(70): do_mmap snapshot pbuf
= 0x4227f000, pmem_fd = 37
07-25 14:20:09.327: D/QualcommCameraHardware(70): initRaw: initializing
mJpegHeap.
07-25 14:20:09.337: I/QualcommCameraHardware(70): pmem pool
/dev/pmem_adsp ioctl(fd = 40, PMEM_GET_SIZE) is 1048576
07-25 14:20:09.337: D/QualcommCameraHardware(70): mBufferSize=729600,
mAlignedBufferSize=1048576
07-25 14:20:09.337: E/QualcommCameraHardware(70): num_buffers = 1
07-25 14:20:09.337: I/QualcommCameraHardware(70): register_buf: camfd =
38, reg = 0 buffer = 0x41521000
07-25 14:20:09.337: D/QualcommCameraHardware(70): initRaw X
07-25 14:20:09.337: I/Camera Preview(1517): For Debug: after
mCamera.takePicture
07-25 14:20:09.337: I/CameraActivity(1517): For Debug: in onPause();
before Thread.sleep(1500)
07-25 14:20:09.337: I/CameraActivity(1517): For Debug:
mPreview.mCameraTakePictureTF: true
07-25 14:20:09.337: I/CameraActivity(1517): For Debug: in onPause();
before Thread.sleep(1500)
07-25 14:20:09.337: D/QualcommCameraHardware(70): snapshot_thread E
07-25 14:20:09.367: D/QualcommCameraHardware(70): receiveRawPicture: E
07-25 14:20:09.377: W/ActivityManager(188): Activity pause timeout for
HistoryRecord{409ff310
com.barclays.common.howtoMoreFun/com.barclays.common.howto.ui.screens.camera.CameraActivity}
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.camifConfig.vSyncEdge 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.camifConfig.hSyncEdge 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.camifConfig.syncMode 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.camifConfig.vfeSubSampleEnable 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.camifConfig.busSubSampleEnable 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.camifConfig.irqSubSampleEnable 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.camifConfig.binningEnable 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.camifConfig.misrEnable 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.EFS.efsEndOfLine 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.EFS.efsStartOfLine 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.EFS.efsEndOfFrame 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.EFS.efsStartOfFrame 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.window.firstPixel 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.window.lastPixel 3279
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.window.firstLine 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.window.lastLine 2455
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.frame.pixelsPerLine 3280
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.frame.linesPerFrame 2456
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.subsample.pixelSkipMask 65535
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.subsample.lineSkipMask 65535
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.subsample.frameSkip 0
07-25 14:20:09.388: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.subsample.frameSkipMode 0
07-25 14:20:09.398: D/mm-camera 8x-vfe snapshot(70):
VFE_CAMIFCfgCmd.subsample.pixelSkipWrap 0
07-25 14:20:09.398: E/mm-camera 8x vfe(70): vfe_util_updaterollofftbl:
sensor doesn't support rolloff correction by VFE
07-25 14:20:09.398: W/mm-camera-zoom(70): Output1 and Output2 aspect
ratios differ. Frames may be distorted
07-25 14:20:09.398: D/mm-camera-ov8810_u(70):
ov8810_set_snapshot_exposure_gain led_active = 0
07-25 14:20:09.398: D/mm-camera-ov8810_u(70):
ov8810_set_snapshot_exposure_gain snapshot_config_ptr->antibanding 1,
snapshot: gain 48 linecount 2496
07-25 14:20:09.398: D/mm-camera-ov8810_u(70):
ov8810_set_snapshot_exposure_gain snapshot_linesPerFrame 2500 snapshot_fps
2472.434608 snapshot_exposuretime 0.103376
07-25 14:20:09.398: D/mm-camera-ov8810_u(70): Anti-banding 60Hz, new
exp_time (ms) = 0.100000, no antiband exp_time = 0.103376
07-25 14:20:09.398: D/mm-camera-ov8810_u(70): actual snapshot: gain 48
linecount 2414
07-25 14:20:09.398: W/Rosie(433): mAddHtcWidgetByOtherActivity = false,
mIsOpenSlideWhenLeaveLaunch = true
07-25 14:20:09.458: D/mm-camera-awb(70): awb_prepare_wb_for_snapshot
r_gain 182, g_gain 141, b_gain 233
07-25 14:20:09.458: D/mm-camera-awb(70): agw_sample_decision=2
07-25 14:20:09.548: D/QualcommCameraHardware(70): notifyShutter
size.width 800 size.height 608
07-25 14:20:09.548: D/CameraService(70): Snapshot image width=800,
height=608
07-25 14:20:09.628: W/InputManagerService(188):
[unbindCurrentClientLocked] Disable input method client.
07-25 14:20:09.628: W/InputManagerService(188): [startInputLocked]
Enable input method client.
07-25 14:20:09.818: D/QualcommCameraHardware(70): native_access_parm:
fd 15, type 67, length 4
07-25 14:20:09.818: D/CameraService(70): handleRawPicture:
bActionScreen: 1
07-25 14:20:09.818: D/CameraService(70): handleRawPicture E,
m_ReceivedRawCount: 0
07-25 14:20:09.818: D/CameraService(70): postProcess, bActionScreen:1,
isoValue:297, prop_iso_midband_i:400, bUseNoise:0, bUseBoost:0
07-25 14:20:09.828: D/CameraService(70): handleRawPicture data Callback
E
07-25 14:20:09.828: D/CameraService(70): handleRawPicture X
07-25 14:20:09.828: D/CameraService(70): handleRawPicture:
bActionScreen: 0
07-25 14:20:09.828: D/CameraService(70): handleRawPicture E,
m_ReceivedRawCount: 1
07-25 14:20:09.828: D/CameraService(70): postProcess, bActionScreen:0,
isoValue:297, prop_iso_midband_i:400, bUseNoise:0, bUseBoost:0
07-25 14:20:09.828: D/QualcommCameraHardware(70): ###### PA: KPI
CAPTURE TIME: 483 ms. #####
07-25 14:20:09.828: D/QualcommCameraHardware(70): native_jpeg_encode,
rotation = 90
07-25 14:20:09.828: D/QualcommCameraHardware(70): native_access_parm:
fd 15, type 67, length 4
07-25 14:20:10.839: I/CameraActivity(1517): For Debug: in onPause();
after Thread.sleep(1500)
07-25 14:20:10.839: I/CameraActivity(1517): For Debug: begin:
finishCamera(), super.onPause()
07-25 14:20:10.839: D/CameraService(70): stopPreview (pid 1517)
07-25 14:20:10.839: D/QualcommCameraHardware(70): stopPreview: E
07-25 14:20:10.839: D/QualcommCameraHardware(70): stopPreviewInternal
E: 0
07-25 14:20:10.839: D/QualcommCameraHardware(70): stopPreviewInternal
X: 0
07-25 14:20:10.839: D/QualcommCameraHardware(70): stopPreview: X
07-25 14:20:10.839: D/CameraService(70): setPreviewCallbackFlag(0) (pid
1517)
07-25 14:20:10.839: D/CameraService(70): setPreviewCallbackFlag(0) (pid
1517)
07-25 14:20:10.839: D/CameraService(70): disconnect E (pid 1517)
07-25 14:20:10.839: D/CameraService(70): hardware teardown
07-25 14:20:10.839: D/QualcommCameraHardware(70): stopPreview: E
07-25 14:20:10.839: D/QualcommCameraHardware(70): stopPreviewInternal
E: 0
07-25 14:20:10.839: D/QualcommCameraHardware(70): stopPreviewInternal
X: 0
07-25 14:20:10.839: D/QualcommCameraHardware(70): stopPreview: X
07-25 14:20:10.839: D/mm-camera-ctrlcmd(70):
config_proc_CAMERA_STOP_SNAPSHOT: received CAMERA_STOP_SNAPSHOT!,
ctrl->state = 13
07-25 14:20:10.839: D/mm-camera-ctrlcmd(70):
config_proc_CAMERA_STOP_SNAPSHOT: snapshot is already stopped (state 13)
07-25 14:20:10.839: E/mm-camera 8x-vfe(70): Received VFE Stop ACK!!!
ctrlCmd is NULL
07-25 14:20:10.839: D/QualcommCameraHardware(70): release E
07-25 14:20:10.839: D/QualcommCameraHardware(70): release: waiting for
snapshot mode to complete.
07-25 14:20:10.989: I/mm-camera(70): signaling jpeg-encoding completion
07-25 14:20:10.989: W/CameraService(70): lockIfMessageWanted(256):
enter sleep
07-25 14:20:11.560: I/ActivityManager(188): Starting activity: Intent {
act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER]
flg=0x10200000 cmp=com.android.camera/.CameraEntry bnds=[360,586][477,704]
} from pid 433
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