所以我为基本手电筒设计了一个应用程序，它可以正常工作，但速度慢且无效，并且在您快速点击开和关按钮的那一刻崩溃。我可以做些什么来改进它？
这是我目前所拥有的:
package com.example.myfirstapp;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.ToggleButton;
import android.graphics.SurfaceTexture;
import android.hardware.Camera.Parameters;
import android.hardware.Camera;
public class MainActivity extends Activity {
public Camera cam = Camera.open();
public Parameters p = cam.getParameters();
public void onToggleClicked(View view) {
// Is the toggle on
ToggleButton button1 = (ToggleButton) findViewById(R.id.toggleButton);
if (button1.isChecked()) {
p = cam.getParameters();
p.setFlashMode(Parameters.FLASH_MODE_OFF);
cam.setParameters(p);
cam.stopPreview();
} else {
p = cam.getParameters();
p.setFlashMode(Parameters.FLASH_MODE_TORCH);
cam.setParameters(p);
cam.startPreview();
}
}
public Camera camera;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
cam.setPreviewTexture(new SurfaceTexture(0));
} catch (Exception e) {
Log.e("App Log Tag", "ERROR", e);
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
记录猫错误:
03-24 20:19:01.023: E/Camera3-Device(184): RequestThread: Can't get output buffer, skipping request: Broken pipe (-32)
03-24 20:19:01.023: E/Camera3-OutputStream(184): getBufferLocked: Stream 0: Can't dequeue next output buffer: Broken pipe (-32)
03-24 20:19:01.023: E/Camera3-Device(184): RequestThread: Can't get output buffer, skipping request: Broken pipe (-32)
03-24 20:19:01.023: E/Camera2Client(184): syncWithDevice: Camera 0: Timed out waiting sync with HAL
03-24 20:19:01.073: W/Camera3-OutputStream(184): disconnectLocked: While disconnecting stream 0 from native window, the native window died from under us
03-24 20:19:01.153: E/mm-camera-intf(184): mm_camera_poll_thread_del_poll_fd: invalid handler 175104 (0)
03-24 20:19:01.153: E/mm-camera(196): mct_pipeline_process_set:command=8000009
03-24 20:19:01.153: E/mm-camera(196): mct_pipeline_process_set: stream_type = 1, streamid 2
03-24 20:19:01.153: E/mm-camera-sensor(196): module_sensor_module_process_event:1987 ide 10002 MCT_EVENT_CONTROL_STREAMOFF
03-24 20:19:01.153: E/mm-camera(196): port_isp_mct_ctrl_cmd: E, identity = 0x10002, STREAMOFF
03-24 20:19:01.153: E/mm-camera(196): cpp_module_handle_streamoff_event:2058, info: doing stream-off for identity 0x10002
03-24 20:19:01.153: E/mm-camera(196): module_faceproc_port_event_func:686] FD_STREAMOFF 0 10002
03-24 20:19:01.153: E/mm-camera-img(196): faceproc_comp_abort:608] state 2
03-24 20:19:01.153: E/mm-camera-img(196): Free Wmemory 0
03-24 20:19:01.153: E/mm-camera-img(196): faceproc_comp_abort:635] X
03-24 20:19:01.153: E/mm-camera(196): cpp_module_handle_streamoff_event:2112, info: stream-off done for identity 0x10002
03-24 20:19:01.153: E/mm-camera(196): isp_streamoff: E, session_id = 1, stream_id = 2, stream_type = 1
03-24 20:19:01.153: E/mm-camera(196): isp_axi_util_subscribe_v4l2_event: event_type = 0x8000100, is_subscribe = 0
03-24 20:19:01.153: E/mm-camera(196): isp_axi_util_subscribe_v4l2_event: event_type = 0x8000009, is_subscribe = 0
03-24 20:19:01.233: E/mm-camera(196): ispif_streamoff: session_id = 1, active_streams = 1
03-24 20:19:01.233: E/mm-camera(196): mct_pipeline_process_set: Stream on/off returned
03-24 20:19:01.263: D/QCamera3Stream(184): static void* qcamera::QCamera3Stream::dataProcRoutine(void*): Exit
03-24 20:19:01.263: E/mm-camera-intf(184): mm_camera_poll_thread_del_poll_fd: invalid handler 175616 (0)
03-24 20:19:01.263: E/mm-camera(196): mct_pipeline_process_set:command=8000009
03-24 20:19:01.263: E/mm-camera(196): mct_pipeline_process_set: stream_type = 6, streamid 3
03-24 20:19:01.263: E/mm-camera-sensor(196): module_sensor_module_process_event:1987 ide 10003 MCT_EVENT_CONTROL_STREAMOFF
03-24 20:19:01.263: E/mm-camera(196): port_isp_mct_ctrl_cmd: E, identity = 0x10003, STREAMOFF
03-24 20:19:01.263: E/mm-camera(196): cpp_module_handle_streamoff_event:2058, info: doing stream-off for identity 0x10003
03-24 20:19:01.263: E/mm-camera(196): cpp_module_handle_streamoff_event:2112, info: stream-off done for identity 0x10003
03-24 20:19:01.263: E/mm-camera(196): isp_streamoff: E, session_id = 1, stream_id = 3, stream_type = 6
03-24 20:19:01.263: E/mm-camera(196): isp_axi_util_subscribe_v4l2_event: event_type = 0x8000009, is_subscribe = 0
03-24 20:19:01.363: E/mm-camera(196): stats_action_buf_config: cfg = 0, stats_mask = 0x5b8
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 0, action = 0xb6e7f759
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 1, action = 0xb6e86569
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 2, action = 0xb6e96971
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 3, action = 0xb6e8ff6d
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 4, action = 0xb6e7b819
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 5, action = 0xb6e80225
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 7, action = 0xb6e950e9
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 8, action = 0xb6e92ab1
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 10, action = 0xb6e824c1
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 11, action = 0xb6e761b1
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 12, action = 0xb6e78f19
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 13, action = 0xb6e83ae1
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 14, action = 0xb6e7a051
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 15, action = 0xb6e93509
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 16, action = 0xb6e7d991
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 17, action = 0xb6e77169
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 18, action = 0xb6e8e295
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 19, action = 0xb6e7c4b1
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 20, action = 0xb6e95555
03-24 20:19:01.373: E/mm-camera(196): isp_pipeline_util_reset: module id = 22, action = 0xb6e8b855
03-24 20:19:01.433: E/mm-camera(196): ispif_streamoff: session_id = 1, active_streams = 0
03-24 20:19:01.433: E/mm-camera-sensor(196): module_sensor_module_process_event:2018 ide 10003 MCT_EVENT_CONTROL_STREAMOFF
03-24 20:19:01.433: E/mm-camera(196): mct_pipeline_process_set: Stream on/off returned
03-24 20:19:01.473: D/QCamera3Stream(184): static void* qcamera::QCamera3Stream::dataProcRoutine(void*): Exit
03-24 20:19:01.473: E/mm-camera(196): mct_pipeline_process_set:command=800000b
03-24 20:19:01.473: E/mm-camera(196): mct_pipeline_process_set: stream_type = 1, streamid 2
03-24 20:19:01.473: E/mm-camera-sensor(196): port_sensor_caps_unreserve:169 ide 10002
03-24 20:19:01.473: E/mm-camera(196): cpp_port_check_caps_unreserve:170, identity=0x10002
03-24 20:19:01.473: E/mm-camera(196): cpp_port_check_caps_unreserve:179, identity=0x10002, unreserved
03-24 20:19:01.473: E/mm-camera(196): cpp_port_check_caps_unreserve:170, identity=0x10002
03-24 20:19:01.473: E/mm-camera(196): cpp_port_check_caps_unreserve:179, identity=0x10002, unreserved
03-24 20:19:01.473: E/mm-camera-img(196): faceproc_comp_abort:608] state 1
03-24 20:19:01.473: E/mm-camera-img(196): faceproc_save_album:774] Error No album
03-24 20:19:01.473: E/mm-camera-img(196): faceproc_comp_eng_destroy: Album save failed -1
03-24 20:19:01.473: E/QCamera3Channel(184): virtual qcamera::QCamera3Channel::~QCamera3Channel(): deleting channel 174849
03-24 20:19:01.473: E/qomx_image_core(184): OMX_Deinit:101] Complete
03-24 20:19:01.473: D/QCamera3PostProc(184): int32_t qcamera::QCamera3PostProcessor::deinit(): Jpeg closed, rc = 0, mJpegClientHandle = 4d00
03-24 20:19:01.473: E/mm-camera(196): mct_pipeline_process_set:command=800000b
03-24 20:19:01.473: E/mm-camera(196): mct_pipeline_process_set: stream_type = 6, streamid 3
03-24 20:19:01.473: E/mm-camera-sensor(196): port_sensor_caps_unreserve:169 ide 10003
03-24 20:19:01.473: E/mm-camera(196): cpp_port_check_caps_unreserve:170, identity=0x10003
03-24 20:19:01.473: E/mm-camera(196): cpp_port_check_caps_unreserve:179, identity=0x10003, unreserved
03-24 20:19:01.473: E/mm-camera(196): q3a_thread_aecawb_stop:308 MSG_STOP_THREAD
03-24 20:19:01.473: E/QCamera3Channel(184): virtual qcamera::QCamera3Channel::~QCamera3Channel(): deleting channel 175362
03-24 20:19:01.473: E/mm-camera(196): mct_pipeline_process_set:command=8000009
03-24 20:19:01.473: E/mm-camera(196): mct_pipeline_process_set: stream_type = 8, streamid 1
03-24 20:19:01.473: E/mm-camera(196): mct_pipeline_process_set: Stream on/off returned
03-24 20:19:01.483: D/QCamera3Stream(184): static void* qcamera::QCamera3Stream::dataProcRoutine(void*): Exit
03-24 20:19:01.483: E/mm-camera(196): mct_pipeline_process_set:command=800000b
03-24 20:19:01.483: E/mm-camera(196): mct_pipeline_process_set: stream_type = 8, streamid 1
03-24 20:19:01.483: E/QCamera3Channel(184): virtual qcamera::QCamera3Channel::~QCamera3Channel(): deleting channel 174336
03-24 20:19:01.483: E/mm-camera(196): mct_pipeline_process_set:command=800000b
03-24 20:19:01.483: E/mm-camera(196): mct_pipeline_get_stream: no children
03-24 20:19:01.483: E/mm-camera(196): mct_pipeline_process_set:1370: Couldn't find stream
03-24 20:19:01.483: E/mm-camera-sensor(196): module_sensor_stop_session:630 session 1
03-24 20:19:01.483: I/PowerManagerService(749): Going to sleep by user request...
03-24 20:19:01.553: E/mm-camera(196): stats_module_stop_session: list =0xaf80cc30, remove port =0xb71a0ba8 name=stats_sink from module=0xb70e3778, name=stats
03-24 20:19:01.553: E/mm-camera(196): stats_module_stop_session: 1 port =0xb71a0ba8 name=stats_sink
03-24 20:19:01.553: E/mm-camera(196): stats_module_stop_session: 2 port =0xb71a0ba8 name=stats_sink
03-24 20:19:01.553: I/mm-camera(196): gyro_module_stop_session: Enter
03-24 20:19:01.553: I/mm-camera(196): gyro_module_stop_session: Deinit DSPS
03-24 20:19:01.553: I/mm-camera(196): gyro_module_stop_session: Exit successful
03-24 20:19:01.553: E/mm-camera(196): stats_module_stop_session: 3 port =0xb71a0ba8 name=stats_sink
03-24 20:19:01.553: E/mm-camera(196): cpp_module_stop_session:453, info: stopping session 1 ...
03-24 20:19:01.553: E/mm-camera(196): cpp_thread_process_pipe_message:359, CPP_THREAD_MSG_ABORT: cpp_thread exiting..
03-24 20:19:01.563: E/mm-camera(196): cpp_module_stop_session:495, info: session 1 stopped.
03-24 20:19:01.563: E/mm-camera(196): c2d_module_stop_session:322, info: stopping session 1 ...
03-24 20:19:01.563: E/mm-camera(196): c2d_module_stop_session:327, info: stopping c2d_thread...
03-24 20:19:01.563: E/mm-camera(196): c2d_module_post_msg_to_thread:381, msg.type=1
03-24 20:19:01.563: E/mm-camera(196): c2d_thread_process_pipe_message:503, C2D_THREAD_MSG_ABORT: c2d_thread exiting..
03-24 20:19:01.563: E/mm-camera(196): c2d_module_stop_session:339, closing c2d subdev...
03-24 20:19:01.563: E/mm-camera(196): c2d_module_stop_session:361, info: session 1 stopped.
03-24 20:19:01.563: I/Camera2Client(184): Camera 0: Closed
03-24 20:19:01.563: I/Camera2ClientBase(184): Closed Camera 0
03-24 20:19:01.953: D/SurfaceFlinger(181): Screen released, type=0 flinger=0xb8658450
03-24 20:19:01.953: D/qdhwcomposer(181): hwc_blank: Blanking display: 0
03-24 20:19:01.983: V/KeyguardHostView(863): Initial transport state: 1, pbstate=2
03-24 20:19:02.073: V/KeyguardHostView(863): show transport, gen:496
03-24 20:19:02.073: V/KeyguardHostView(863): music state changed: 2
03-24 20:19:02.243: D/qdhwcomposer(181): hwc_blank: Done blanking display: 0
03-24 20:19:02.243: D/SurfaceControl(749): Excessive delay in blankDisplay() while turning screen off: 293ms
03-24 20:19:02.273: D/PhoneStatusBar(863): disable: < EXPAND* icons alerts TICKER* system_info BACK* HOME* RECENT* CLOCK* search >
03-24 20:19:02.303: W/IInputConnectionWrapper(863): getExtractedText on inactive InputConnection
03-24 20:19:02.303: W/IInputConnectionWrapper(863): getTextBeforeCursor on inactive InputConnection
03-24 20:19:02.303: W/IInputConnectionWrapper(863): getSelectedText on inactive InputConnection
03-24 20:19:02.303: W/IInputConnectionWrapper(863): getTextAfterCursor on inactive InputConnection
03-24 20:19:02.313: E/InputEventModelImpl(976): onStartInput event aborted: com.touchtype.keyboard.inputeventmodel.ExtractedTextUnavailableException: could not obtain extracted text (class com.touchtype.keyboard.inputeventmodel.ExtractedTextUnavailableException)
03-24 20:19:02.323: D/NfcService(1036): NFC-C OFF
03-24 20:19:10.943: I/art(20002): Heap trim of managed (duration=2.543657ms, advised=796KB) and native (duration=1.751706ms, advised=72KB) heaps. Managed heap utilization of 56%.
03-24 20:19:10.953: I/GCM(20002): GCM message com.google.android.googlequicksearchbox 0:1395706750356778%8b460216f9fd7ecd
03-24 20:19:11.463: D/ConnectivityService(749): handleInetConditionHoldEnd: net=1, condition=100, published condition=100
03-24 20:20:53.503: I/PackageManager(749): Action: "android.intent.action.SENDTO"
03-24 20:20:53.503: I/PackageManager(749): Category: "android.intent.category.DEFAULT"
03-24 20:20:53.503: I/PackageManager(749): Scheme: "sms"
03-24 20:20:53.503: I/PackageManager(749): Adding preferred activity ComponentInfo{com.google.android.talk/com.google.android.apps.babel.phone.BabelHomeActivity} for user 0 :
03-24 20:20:53.523: I/PackageManager(749): Action: "android.intent.action.SENDTO"
03-24 20:20:53.523: I/PackageManager(749): Category: "android.intent.category.DEFAULT"
03-24 20:20:53.523: I/PackageManager(749): Scheme: "smsto"
03-24 20:20:53.523: I/PackageManager(749): Adding preferred activity ComponentInfo{com.google.android.talk/com.google.android.apps.babel.phone.BabelHomeActivity} for user 0 :
03-24 20:20:53.543: I/PackageManager(749): Action: "android.intent.action.SENDTO"
03-24 20:20:53.543: I/PackageManager(749): Category: "android.intent.category.DEFAULT"
03-24 20:20:53.543: I/PackageManager(749): Scheme: "mms"
03-24 20:20:53.543: I/PackageManager(749): Adding preferred activity ComponentInfo{com.google.android.talk/com.google.android.apps.babel.phone.BabelHomeActivity} for user 0 :
03-24 20:20:53.563: I/PackageManager(749): Action: "android.intent.action.SENDTO"
03-24 20:20:53.563: I/PackageManager(749): Category: "android.intent.category.DEFAULT"
03-24 20:20:53.563: I/PackageManager(749): Scheme: "mmsto"
03-24 20:20:53.563: I/PackageManager(749): Adding preferred activity ComponentInfo{com.google.android.talk/com.google.android.apps.babel.phone.BabelHomeActivity} for user 0 :
03-24 20:20:53.693: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (com.google.android.gms.internal.gr@662f66b8)
03-24 20:20:53.723: I/art(29404): Heap trim of managed (duration=18.206399ms, advised=1188KB) and native (duration=5.492916ms, advised=1104KB) heaps. Managed heap utilization of 67%.
03-24 20:20:53.743: W/CursorWrapperInner(29404): Cursor finalized without prior close()
03-24 20:20:53.743: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (internal object: com.google.android.gms.common.data.d@66251ce8)
03-24 20:20:53.743: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (com.google.android.gms.internal.gr@65ba0ca8)
03-24 20:20:53.753: W/CursorWrapperInner(29404): Cursor finalized without prior close()
03-24 20:20:53.753: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (internal object: com.google.android.gms.common.data.d@657e9e90)
03-24 20:20:53.753: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (com.google.android.gms.internal.gr@65ce8cb8)
03-24 20:20:53.763: W/CursorWrapperInner(29404): Cursor finalized without prior close()
03-24 20:20:53.763: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (internal object: com.google.android.gms.common.data.d@66790968)
03-24 20:20:53.763: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (com.google.android.gms.internal.gr@667970d8)
03-24 20:20:53.763: W/CursorWrapperInner(29404): Cursor finalized without prior close()
03-24 20:20:53.763: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (internal object: com.google.android.gms.common.data.d@6605e2e8)
03-24 20:20:53.763: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (com.google.android.gms.internal.gr@66147400)
03-24 20:20:53.763: W/CursorWrapperInner(29404): Cursor finalized without prior close()
03-24 20:20:53.763: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (internal object: com.google.android.gms.common.data.d@65f808c8)
03-24 20:20:53.763: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (com.google.android.gms.internal.gr@65f3cd98)
03-24 20:20:53.763: W/CursorWrapperInner(29404): Cursor finalized without prior close()
03-24 20:20:53.763: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (internal object: com.google.android.gms.common.data.d@6609df98)
03-24 20:20:53.773: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (com.google.android.gms.internal.gr@65f4e930)
03-24 20:20:53.773: W/CursorWrapperInner(29404): Cursor finalized without prior close()
03-24 20:20:53.773: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (internal object: com.google.android.gms.common.data.d@663df8a0)
03-24 20:20:53.773: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (com.google.android.gms.internal.gr@663e8508)
03-24 20:20:53.773: W/CursorWrapperInner(29404): Cursor finalized without prior close()
03-24 20:20:53.773: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (internal object: com.google.android.gms.common.data.d@65bd4608)
03-24 20:20:53.773: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (com.google.android.gms.internal.gr@65b29598)
03-24 20:20:53.773: W/CursorWrapperInner(29404): Cursor finalized without prior close()
03-24 20:20:53.773: E/DataHolder(29404): Internal data leak within a DataBuffer object detected! Be sure to explicitly call close() on all DataBuffer extending objects when you are done with them. (internal object: com.google.android.gms.common.data.d@665aafe8)
03-24 20:20:53.843: W/Babel(29404): Media failed to load:Base:content://com.android.contacts/contacts/10 Account=None Load:content://com.android.contacts/contacts/10 key=content://com.android.contacts/contacts/10s192-c-k-no
03-24 20:20:53.883: W/ManagedEGLContext(29404): doTerminate failed: EGL count is 2 but managed count is 1
03-24 20:20:57.573: V/KeyguardServiceDelegate(749): onScreenTurnedOn(showListener = com.android.internal.policy.impl.PhoneWindowManager$17@66480238)
03-24 20:20:57.573: I/PowerManagerService(749): Waking up from sleep...
03-24 20:20:57.583: D/SurfaceFlinger(181): Screen acquired, type=0 flinger=0xb8658450
03-24 20:20:57.583: D/qdhwcomposer(181): hwc_blank: Unblanking display: 0
03-24 20:20:57.623: V/KeyguardServiceDelegate(749): **** SHOWN CALLED ****
03-24 20:20:57.623: I/WindowManager(749): Lock screen displayed!
03-24 20:20:57.813: D/qdhwcomposer(181): hwc_blank: Done unblanking display: 0
03-24 20:20:57.813: D/SurfaceControl(749): Excessive delay in unblankDisplay() while turning screen on: 239ms
03-24 20:21:00.043: D/NfcService(1036): NFC-C ON
03-24 20:21:00.043: I/USERIAL_LINUX(1036): USERIAL_Open(): enter
03-24 20:21:00.043: I/USERIAL_LINUX(1036): USERIAL_Open() device: /dev/bcm2079x port=5, uart_port=0 WAKE_DELAY(20) WRITE_DELAY(20) POWER_ON_DELAY(0) PRE_POWER_OFF_DELAY(10) POST_POWER_OFF_DELAY(0)
03-24 20:21:00.053: I/USERIAL_LINUX(1036): USERIAL_Open(): exit
03-24 20:21:00.053: D/PhoneStatusBar(863): disable: < expand* icons alerts ticker* system_info back* home* recent* clock* search >
03-24 20:21:00.083: W/InputMethodManagerService(749): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@663e5910 attribute=android.view.inputmethod.EditorInfo@663fbc18, token = android.os.BinderProxy@663e5cf8
03-24 20:21:00.133: I/GCM(20002): GCM message com.google.android.googlequicksearchbox 0:1395706815615054%8b460216f9fd7ecd
03-24 20:21:00.633: D/ConnectivityService(749): handleInetConditionHoldEnd: net=1, condition=100, published condition=100
03-24 20:21:01.473: D/audio_hw_primary(184): out_set_parameters: enter: usecase(1: low-latency-playback) kvpairs: routing=2
03-24 20:21:01.483: E/qcom_sensors_hal(749): hal_process_report_ind: Bad item quality: 11
03-24 20:21:01.493: D/audio_hw_primary(184): select_devices: out_snd_device(2: speaker) in_snd_device(0: )
03-24 20:21:01.553: I/art(749): Heap trim of managed (duration=15.460886ms, advised=8MB) and native (duration=3.325208ms, advised=1456KB) heaps. Managed heap utilization of 49%.
03-24 20:21:01.743: E/SpannableStringBuilder(29404): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
03-24 20:21:01.743: E/SpannableStringBuilder(29404): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
03-24 20:21:02.443: I/art(29404): Note: end time exceeds epoch:
03-24 20:21:03.653: I/GCoreUlr(19985): Successfully inserted location
03-24 20:21:03.653: I/GCoreUlr(19985): Not calling LocationReportingService, hasMoved: false, elapsed millis: 1705539, request: Phone
03-24 20:21:13.363: I/GCM(20002): GCM message com.google.android.googlequicksearchbox 0:1395706873059911%8b460216f9fd7ecd
03-24 20:21:13.503: I/art(749): Heap trim of managed (duration=12.612083ms, advised=8MB) and native (duration=2.613177ms, advised=1480KB) heaps. Managed heap utilization of 48%.
03-24 20:21:13.863: D/ConnectivityService(749): handleInetConditionHoldEnd: net=1, condition=100, published condition=100
03-24 20:21:30.493: E/qcom_sensors_hal(749): hal_process_report_ind: Bad item quality: 11
03-24 20:21:31.423: I/PowerManagerService(749): Going to sleep due to screen timeout...
03-24 20:21:31.893: D/SurfaceFlinger(181): Screen released, type=0 flinger=0xb8658450
03-24 20:21:31.893: D/qdhwcomposer(181): hwc_blank: Blanking display: 0
03-24 20:21:31.993: D/NfcService(1036): NFC-C OFF
03-24 20:21:32.023: I/art(976): Heap trim of managed (duration=4.792968ms, advised=2MB) and native (duration=4.003073ms, advised=532KB) heaps. Managed heap utilization of 35%.
03-24 20:21:32.033: W/IInputConnectionWrapper(29404): getExtractedText on inactive InputConnection
03-24 20:21:32.033: W/IInputConnectionWrapper(29404): getTextBeforeCursor on inactive InputConnection
03-24 20:21:32.033: W/IInputConnectionWrapper(29404): getSelectedText on inactive InputConnection
03-24 20:21:32.033: W/IInputConnectionWrapper(29404): getTextAfterCursor on inactive InputConnection
03-24 20:21:32.033: E/InputEventModelImpl(976): onStartInput event aborted: com.touchtype.keyboard.inputeventmodel.ExtractedTextUnavailableException: could not obtain extracted text (class com.touchtype.keyboard.inputeventmodel.ExtractedTextUnavailableException)
03-24 20:21:32.183: D/qdhwcomposer(181): hwc_blank: Done blanking display: 0
03-24 20:21:32.183: D/SurfaceControl(749): Excessive delay in blankDisplay() while turning screen off: 285ms
03-24 20:21:36.923: V/KeyguardHostView(863): Initial transport state: 1, pbstate=2
03-24 20:21:36.983: V/KeyguardHostView(863): show transport, gen:496
03-24 20:21:36.983: V/KeyguardHostView(863): music state changed: 2
03-24 20:21:37.013: D/PhoneStatusBar(863): disable: < EXPAND* icons alerts TICKER* system_info BACK* HOME* RECENT* CLOCK* search >
03-24 20:22:45.323: I/Icing.InternalIcingCorporaProvider(8816): Updating corpora: A: SCORES, C: NONE
03-24 20:22:45.513: I/Icing.InternalIcingCorporaProvider(8816): UpdateCorporaTask done [took 188 ms] updated apps [took 188 ms]
03-24 20:22:46.523: I/Icing(20044): Indexing 52936F3E5A814571A566B6ECEFFA4D84BBC000B6 from com.google.android.googlequicksearchbox
03-24 20:22:46.573: I/Icing(20044): Indexing done 52936F3E5A814571A566B6ECEFFA4D84BBC000B6
03-24 20:22:47.443: W/IdleConnectionHandler(7124): Removing a connection that never existed!
03-24 20:22:47.903: W/IdleConnectionHandler(7124): Removing a connection that never existed!
03-25 16:46:11.143: E/BufferQueue(28408): [unnamed-28408-0] dequeueBuffer: BufferQueue has been abandoned!
03-25 16:46:11.143: E/BufferQueue(28408): [unnamed-28408-0] dequeueBuffer: BufferQueue has been abandoned!
03-25 16:46:11.143: E/BufferQueue(28408): [unnamed-28408-0] dequeueBuffer: BufferQueue has been abandoned!
03-25 16:46:11.143: E/BufferQueue(28408): [unnamed-28408-0] dequeueBuffer: BufferQueue has been abandoned!
03-25 16:46:11.193: I/Choreographer(28408): Skipped 266 frames! The application may be doing too much work on its main thread.
最佳答案
根据您发布的内容，打开或关闭手电筒应该没有任何大问题，因此我尝试自己实现一个非常简单的应用程序，只需一个切换按钮，并在 Samsung Galaxy Fame 上运行它进行测试。
但首先要了解您的代码: 你不应该公开类变量，除非你真的有充分的理由这样做(即使那样你也应该重新考虑将它们设为私有(private))。
其次:由于您在应用程序的活跃生命周期内保持相机连接打开，因此您应该在应用程序未处于 Activity 状态时(即调用 onStop() 时)松开相机。因此，在调用 onStart() 之前，您不应该打开相机连接。或者，您可以将此控件放在 onCreate() 和 onDestroy() 中，以便您的手电筒可以在屏幕锁定时处于 Activity 状态(从而节省电量更长时间并防止用户触摸任何东西)。
我创建的应用程序与您的应用程序非常相似，但是它不会崩溃，运行速度非常快，而且我确实非常快速地按下切换按钮大约 2 分钟才停止。在那段时间没有发生崩溃或延迟。
如果您想自己测试，这里是完整的代码:
主要 Activity .java:
import android.app.Activity;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ToggleButton;
public class MainActivity extends Activity {
private Camera cam;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cam = Camera.open();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void toggleButtonClick(View view){
Parameters p;
if(getToggleButton().isChecked()){
p = cam.getParameters();
p.setFlashMode(Parameters.FLASH_MODE_TORCH);
cam.setParameters(p);
cam.startPreview();
}
else{
p = cam.getParameters();
p.setFlashMode(Parameters.FLASH_MODE_OFF);
cam.setParameters(p);
cam.stopPreview();
}
}
public ToggleButton getToggleButton(){
return (ToggleButton) findViewById(R.id.toggleButton1);
}
@Override
public void onDestroy(){
super.onDestroy();
cam.release();
}
}
activity_main.xml:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.test.flashlightapp.MainActivity"
tools:ignore="MergeRootFrame" >
<ToggleButton
android:id="@+id/toggleButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="toggleButtonClick"
android:text="ToggleButton" />
</FrameLayout>
然后我将这两行添加到 list 文件中:
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.FLASHLIGHT"/>
我已经测试了这段代码，它在我的 Samsung Galaxy Fame 上运行良好。
希望对您有所帮助。
关于java - 我的手电筒应用程序很慢而且经常崩溃我不知道我做错了什么，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22613384/