Android：支持的相机预览大小纵横比错误_Android_Android Camera_Surfaceview

Android：支持的相机预览大小纵横比错误

android

Android：支持的相机预览大小纵横比错误,android,android-camera,surfaceview,Android,Android Camera,Surfaceview,解决方案：我实际上并没有设置相机预览，而是缩放它附带的默认预览。您需要将参数分配回相机，因为\u camera.getParameters.setPreviewSize（）不起作用我正在努力让Android摄像头在我的手机上预览（最好是全屏）然而，我遇到了一种情况，我觉得硬件和软件都在与我作对：/ 我得到了一个支持摄像头的屏幕尺寸列表。对于一半的手机（我的12台设备中约有6台），当我将预览设置为与屏幕上最接近的预览匹配时，这一切都很好但是，在另一半上，预览是拉伸和倾斜的。有许多帖子已经存在

解决方案：我实际上并没有设置相机预览，而是缩放它附带的默认预览。您需要将参数分配回相机，因为

\u camera.getParameters.setPreviewSize（）

不起作用
我正在努力让Android摄像头在我的手机上预览（最好是全屏）
然而，我遇到了一种情况，我觉得硬件和软件都在与我作对：/
我得到了一个支持摄像头的屏幕尺寸列表。对于一半的手机（我的12台设备中约有6台），当我将预览设置为与屏幕上最接近的预览匹配时，这一切都很好
但是，在另一半上，预览是拉伸和倾斜的。有许多帖子已经存在并声称解决了这个问题，但没有
我发现的原因是：我从硬件本身获得的支持的摄像头屏幕尺寸列表是错误的。为什么？因为当手动将相机设置为其支持的最高尺寸之一时，纵横比仍处于关闭状态：

_camera.getParameters().setPreviewSize(720,1280); getHolder().setFixedSize(720, 1280);
这款手机的屏幕尺寸为768 x 1280。支持的最接近屏幕大小为720 x 1280。将其设置为该值仍会导致图像失真。下一个支持的屏幕大小分辨率是1280 x 960。对我来说，这很有趣，因为它说它支持两种不同的纵横比，但其中一些“支持的”纵横比是倾斜的。i、它说它支持4:3和16:9，但只有4:3看起来正常

getHolder().setFixedSize(720, 960); //fixes issue even though this is NOT a supported screen size
当我使用不受支持的屏幕尺寸720 x 960，强制曲面保持架匹配4:3的纵横比时，相机预览显示正常
我的问题是，在支持的纵横比不同于它所说的纵横比的相机中，我如何知道相机的纵横比是多少
更新
深入了解我的手机细节：

这款手机配有摄像头，可将图像保存为3264 x 2448。高宽比为4:3。我要看看是否可以从手机中获取这些数据，并使用这些数据设置所需的纵横比
更新2
使用
它给我640x480。再加上一点数学，它的纵横比是4:3。然后我使用它并适当地缩放我的相机
它很粗糙，但它完成了任务

//Because the camera LIES about supporting both 16:9 and 4:3 we must find the actual one from the picture size void determineCameraAspectRatio() { int cameraWidth = _camera.getParameters().getPictureSize().width; int cameraHeight = _camera.getParameters().getPictureSize().height; if( cameraWidth*3 == cameraHeight*4) { System.out.println("4:3"); } if( cameraWidth*9 == cameraHeight*16) { System.out.println("16:9"); } }
并将修复应用于相机：

if(_is4By3AspectRatio) { height = (Helper.screenWidthPX(_context) * 4)/3; }else//16:9 { height = (Helper.screenWidthPX(_context) * 16)/9; } _camera.getParameters().setPreviewSize(Helper.screenWidthPX(_context),height); getHolder().setFixedSize(Helper.screenWidthPX(_context),height); }
更新
这适用于许多手机，但在某些手机上甚至是错误的。Nexus 6报告背面摄像头纵横比为4:3，其最高支持比为1440 x 1920，但将其设置为该值会导致图像倾斜。我完全不知道为什么。所有这些都没有意义。它说它希望图片的纵横比为4:3，但只能以16:9的比例（正面和背面）正确显示。真奇怪
这是surfaceFlinger上的系统转储

SurfaceFlinger Build configuration: [sf] [libui] [libgui] Sync configuration: [using: EGL_ANDROID_native_fence_sync EGL_KHR_wait_sync] DispSync configuration: app phase 0 ns, sf phase 0 ns, present offset 0 ns (refresh 16666667 ns) Visible layers (count = 10) + LayerDim 0xb8919c28 (DimLayer) Region transparentRegion (this=0xb8919d88, count=1) [ 0, 0, 0, 0] Region visibleRegion (this=0xb8919c30, count=1) [ 0, 0, 0, 0] layerStack= 0, z= 0, pos=(0,0), size=( 16, 16), crop=( 0, 0, -1, -1), isOpaque=0, invalidate=0, alpha=0xff, flags=0x00000001, tr=[1.00, 0.00][0.00, 1.00] client=0xb88ebac8 format= 0, activeBuffer=[ 0x 0: 0, 0], queued-frames=0, mRefreshPending=0 mTexName=4 mCurrentTexture=-1 mCurrentCrop=[49152,0,415,-1] mCurrentTransform=0 mAbandoned=0 -BufferQueue mMaxAcquiredBufferCount=1, mDequeueBufferCannotBlock=0, default-size=[1x1], default-format=1, transform-hint=00, FIFO(0)={} + LayerDim 0xb88659d0 (DimLayer) Region transparentRegion (this=0xb8865b30, count=1) [ 0, 0, 0, 0] Region visibleRegion (this=0xb88659d8, count=1) [ 0, 0, 0, 0] layerStack= 0, z= 0, pos=(0,0), size=( 16, 16), crop=( 0, 0, -1, -1), isOpaque=0, invalidate=0, alpha=0xff, flags=0x00000001, tr=[1.00, 0.00][0.00, 1.00] client=0xb88ebac8 format= 0, activeBuffer=[ 0x 0: 0, 0], queued-frames=0, mRefreshPending=0 mTexName=5 mCurrentTexture=-1 mCurrentCrop=[0,0,0,0] mCurrentTransform=0 mAbandoned=0 -BufferQueue mMaxAcquiredBufferCount=1, mDequeueBufferCannotBlock=0, default-size=[1x1], default-format=1, transform-hint=00, FIFO(0)={} + LayerDim 0xb886d000 (DimLayer) Region transparentRegion (this=0xb886d160, count=1) [ 0, 0, 0, 0] Region visibleRegion (this=0xb886d008, count=1) [ 0, 0, 0, 0] layerStack= 0, z= 0, pos=(0,0), size=( 16, 16), crop=( 0, 0, -1, -1), isOpaque=0, invalidate=0, alpha=0xff, flags=0x00000001, tr=[1.00, 0.00][0.00, 1.00] client=0xb88ebac8 format= 0, activeBuffer=[ 0x 0: 0, 0], queued-frames=0, mRefreshPending=0 mTexName=6 mCurrentTexture=-1 mCurrentCrop=[-16843010,-16843010,-16843010,-16843010] mCurrentTransform=0 mAbandoned=0 -BufferQueue mMaxAcquiredBufferCount=1, mDequeueBufferCannotBlock=0, default-size=[1x1], default-format=1, transform-hint=00, FIFO(0)={} + Layer 0xb88f9580 (com.android.phasebeam.PhaseBeamWallpaper) Region transparentRegion (this=0xb88f96e0, count=1) [ 0, 0, 0, 0] Region visibleRegion (this=0xb88f9588, count=1) [ 0, 0, 0, 0] layerStack= 0, z= 21000, pos=(0,0), size=( 768,1280), crop=( 0, 0, 768,1280), isOpaque=1, invalidate=0, alpha=0xff, flags=0x00000003, tr=[1.00, 0.00][0.00, 1.00] client=0xb88591d0 format= 2, activeBuffer=[ 768x1280:1024, 3], queued-frames=0, mRefreshPending=0 mTexName=8 mCurrentTexture=1 mCurrentCrop=[0,0,0,0] mCurrentTransform=0 mAbandoned=0 -BufferQueue mMaxAcquiredBufferCount=1, mDequeueBufferCannotBlock=0, default-size=[768x1280], default-format=2, transform-hint=00, FIFO(0)={} [00:0xb8911cc8] state=FREE , 0xb8868488 [ 768x1280:1024, 3] >[01:0xb88feb78] state=ACQUIRED, 0xb88fdc40 [ 768x1280:1024, 3] [02:0xb88ff1c0] state=FREE , 0xb88fedf0 [ 768x1280:1024, 3] + Layer 0xb887db18 (SurfaceView) Region transparentRegion (this=0xb887dc78, count=1) [ 0, 0, 0, 0] Region visibleRegion (this=0xb887db20, count=1) [ 0, 0, 768, 1024] layerStack= 0, z= 21025, pos=(0,0), size=( 768,1024), crop=( 0, 0, 768,1024), isOpaque=1, invalidate=0, alpha=0xff, flags=0x00000002, tr=[1.00, 0.00][0.00, 1.00] client=0xb89124b8 format= 4, activeBuffer=[ 640x 480: 640, 11], queued-frames=0, mRefreshPending=0 mTexName=61 mCurrentTexture=3 mCurrentCrop=[0,0,0,0] mCurrentTransform=0x4 mAbandoned=0 -BufferQueue mMaxAcquiredBufferCount=1, mDequeueBufferCannotBlock=0, default-size=[768x1024], default-format=4, transform-hint=00, FIFO(0)={} [00:0xb8923620] state=DEQUEUED, 0xb89000e0 [ 640x 480: 640, 11] [01:0xb88784c8] state=DEQUEUED, 0xb8878160 [ 640x 480: 640, 11] [02:0xb8878550] state=DEQUEUED, 0xb88785f0 [ 640x 480: 640, 11] >[03:0xb8877120] state=ACQUIRED, 0xb8878638 [ 640x 480: 640, 11] [04:0xb8913c48] state=DEQUEUED, 0xb886c8a0 [ 640x 480: 640, 11] [05:0xb88ff0f8] state=DEQUEUED, 0xb8879b08 [ 640x 480: 640, 11] [06:0xb8900930] state=DEQUEUED, 0xb88c3308 [ 640x 480: 640, 11] + Layer 0xb8862be8 (co.pumpup.app/co.pumpup.app.Activities.CameraEditorActivity) Region transparentRegion (this=0xb8862d48, count=1) [ 0, 0, 0, 0] Region visibleRegion (this=0xb8862bf0, count=1) [ 0, 0, 768, 1280] layerStack= 0, z= 21030, pos=(0,0), size=( 768,1280), crop=( 0, 0, 768,1280), isOpaque=0, invalidate=0, alpha=0xff, flags=0x00000000, tr=[1.00, 0.00][0.00, 1.00] client=0xb89124b8 format= 1, activeBuffer=[ 768x1280: 768, 1], queued-frames=0, mRefreshPending=0 mTexName=60 mCurrentTexture=2 mCurrentCrop=[0,0,0,0] mCurrentTransform=0 mAbandoned=0 -BufferQueue mMaxAcquiredBufferCount=1, mDequeueBufferCannotBlock=0, default-size=[768x1280], default-format=1, transform-hint=00, FIFO(0)={} [00:0xb88ffff8] state=FREE , 0xb88ed258 [ 768x1280: 768, 1] [01:0xb88fe908] state=FREE , 0xb88ff3d0 [ 768x1280: 768, 1] >[02:0xb8872348] state=ACQUIRED, 0xb88a6110 [ 768x1280: 768, 1] + Layer 0xb88befc0 (FocusedStackFrame) Region transparentRegion (this=0xb88bf120, count=1) [ 0, 0, 0, 0] Region visibleRegion (this=0xb88befc8, count=1) [ 0, 0, 0, 0] layerStack= 0, z= 21031, pos=(0,0), size=( 1, 1), crop=( 0, 0, -1, -1), isOpaque=0, invalidate=0, alpha=0x4d, flags=0x00000001, tr=[1.00, 0.00][0.00, 1.00] client=0xb88ebac8 format= 1, activeBuffer=[ 0x 0: 0, 0], queued-frames=0, mRefreshPending=0 mTexName=3 mCurrentTexture=-1 mCurrentCrop=[524288,327680,0,0] mCurrentTransform=0 mAbandoned=0 -BufferQueue mMaxAcquiredBufferCount=1, mDequeueBufferCannotBlock=0, default-size=[1x1], default-format=1, transform-hint=00, FIFO(0)={} + LayerDim 0xb886f9c8 (DimLayer) Region transparentRegion (this=0xb886fb28, count=1) [ 0, 0, 0, 0] Region visibleRegion (this=0xb886f9d0, count=1) [ 0, 0, 0, 0] layerStack= 0, z= 22019, pos=(-192,-320), size=(1152,1920), crop=( 0, 0, -1, -1), isOpaque=0, invalidate=0, alpha=0x00, flags=0x00000001, tr=[1.00, 0.00][0.00, 1.00] client=0xb88ebac8 format= 0, activeBuffer=[ 0x 0: 0, 0], queued-frames=0, mRefreshPending=0 mTexName=7 mCurrentTexture=-1 mCurrentCrop=[-67372037,-67372037,1919905635,-842203036] mCurrentTransform=0 mAbandoned=0 -BufferQueue mMaxAcquiredBufferCount=1, mDequeueBufferCannotBlock=0, default-size=[1152x1920], default-format=1, transform-hint=00, FIFO(0)={} + Layer 0xb8900d20 (StatusBar) Region transparentRegion (this=0xb8900e80, count=1) [ 0, 0, 0, 0] Region visibleRegion (this=0xb8900d28, count=1) [ 0, 0, 0, 0] layerStack= 0, z= 151000, pos=(0,0), size=( 768, 50), crop=( 0, 0, 768, 50), isOpaque=0, invalidate=0, alpha=0xff, flags=0x00000001, tr=[1.00, 0.00][0.00, 1.00] client=0xb88fea70 format= 1, activeBuffer=[ 768x 50: 768, 1], queued-frames=0, mRefreshPending=0 mTexName=10 mCurrentTexture=2 mCurrentCrop=[0,0,0,0] mCurrentTransform=0 mAbandoned=0 -BufferQueue mMaxAcquiredBufferCount=1, mDequeueBufferCannotBlock=0, default-size=[768x50], default-format=1, transform-hint=00, FIFO(0)={} [00:0xb887a088] state=FREE , 0xb8873348 [ 768x 50: 768, 1] [01:0xb88fe2f8] state=FREE , 0xb89004b8 [ 768x 50: 768, 1] >[02:0xb8879fd8] state=ACQUIRED, 0xb88773c8 [ 768x 50: 768, 1] + Layer 0xb8861748 (NavigationBar) Region transparentRegion (this=0xb88618a8, count=1) [ 0, 0, 0, 0] Region visibleRegion (this=0xb8861750, count=1) [ 0, 0, 0, 0] layerStack= 0, z= 201000, pos=(0,1184), size=( 768, 96), crop=( 0, 0, 768, 96), isOpaque=0, invalidate=0, alpha=0xff, flags=0x00000001, tr=[1.00, 0.00][0.00, 1.00] client=0xb88fea70 format= 1, activeBuffer=[ 768x 96: 768, 1], queued-frames=0, mRefreshPending=0 mTexName=11 mCurrentTexture=2 mCurrentCrop=[0,0,0,0] mCurrentTransform=0 mAbandoned=0 -BufferQueue mMaxAcquiredBufferCount=1, mDequeueBufferCannotBlock=0, default-size=[768x96], default-format=1, transform-hint=00, FIFO(0)={} [00:0xb88fff08] state=FREE , 0xb88fdf68 [ 768x 96: 768, 1] [01:0xb88c2920] state=FREE , 0xb8862b88 [ 768x 96: 768, 1] >[02:0xb8913d00] state=ACQUIRED, 0xb88c5138 [ 768x 96: 768, 1] Displays (1 entries) + DisplayDevice: Built-in Screen type=0, hwcId=0, layerStack=0, ( 768x1280), ANativeWindow=0xb885cd68, orient= 0 (type=00000000), flips=30060, isSecure=1, secureVis=0, powerMode=2, activeConfig=0, numLayers=2 v:[0,0,768,1280], f:[0,0,768,1280], s:[0,0,768,1280],transform:[[1.000,0.000,-0.000][0.000,1.000,-0.000][0.000,0.000,1.000]] mAbandoned=0 -BufferQueue mMaxAcquiredBufferCount=1, mDequeueBufferCannotBlock=0, default-size=[768x1280], default-format=1, transform-hint=00, FIFO(0)={} [00:0xb8913f80] state=DEQUEUED, 0xb88642e8 [ 768x1280: 768, 1] >[01:0xb885fd80] state=ACQUIRED, 0xb8911608 [ 768x1280: 768, 1] SurfaceFlinger global state: EGL implementation : 1.4 EGL_QUALCOMM_shared_image EGL_KHR_image EGL_KHR_image_base EGL_QCOM_create_image EGL_KHR_lock_surface EGL_KHR_lock_surface2 EGL_KHR_fence_sync EGL_KHR_cl_eventEGL_KHR_cl_event2EGL_IMG_context_priority EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_renderbuffer_image EGL_EXT_create_context_robustness EGL_ANDROID_blob_cache EGL_ANDROID_framebuffer_target EGL_KHR_create_context EGL_KHR_wait_sync EGL_KHR_gl_colorspace EGL_ANDROID_image_crop EGL_ANDROID_recordable EGL_ANDROID_native_fence_sync EGL_ANDROID_image_native_buffer EGL_KHR_gl_colorspace EGL_IMG_image_plane_attribs GLES: Qualcomm, Adreno (TM) 320, OpenGL ES 3.0 V@95.0 AU@ (GIT@Ia6306ec328) GL_AMD_compressed_ATC_texture GL_AMD_performance_monitor GL_AMD_program_binary_Z400 GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_discard_framebuffer GL_EXT_robustness GL_EXT_texture_format_BGRA8888 GL_EXT_texture_type_2_10_10_10_REV GL_NV_fence GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth_texture GL_OES_depth24 GL_OES_EGL_image GL_OES_EGL_sync GL_OES_EGL_image_external GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_fragment_precision_high GL_OES_get_program_binary GL_OES_packed_depth_stencil GL_OES_depth_texture_cube_map GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_texture_3D GL_OES_texture_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_half_float GL_OES_vertex_type_10_10_10_2 GL_OES_vertex_array_object GL_QCOM_alpha_test GL_QCOM_binning_control GL_QCOM_driver_control GL_QCOM_perfmon_global_mode GL_QCOM_extended_get GL_QCOM_extended_get2 GL_QCOM_tiled_rendering GL_QCOM_writeonly_rendering GL_EXT_sRGB GL_EXT_sRGB_write_control GL_EXT_texture_sRGB_decode GL_EXT_multisampled_render_to_texture GL_EXT_color_buffer_float GL_EXT_color_buffer_half_float GL_EXT_disjoint_timer_query Region undefinedRegion (this=0xb8859fe4, count=1) [ 0, 1024, 768, 1280] orientation=0, isDisplayOn=1 last eglSwapBuffers() time: 1251.335000 us last transaction time : 305.204000 us transaction-flags : 00000000 refresh-rate : 59.999999 fps x-dpi : 319.790009 y-dpi : 318.744995 gpu_to_cpu_unsupported : 0 eglSwapBuffers time: 0.000000 us transaction time: 0.000000 us VSYNC state: disabled soft-vsync: disabled numListeners=14, events-delivered: 26757 0xb88642c0: count=-1 0xb88680e8: count=-1 0xb88684d0: count=-1 0xb886c8f8: count=-1 0xb886c9b8: count=-1 0xb886cf10: count=-1 0xb8874450: count=-1 0xb88ac618: count=-1 0xb88c1658: count=-1 0xb88fda88: count=-1 0xb89005d0: count=-1 0xb8912398: count=-1 0xb89125d8: count=-1 0xb8913e50: count=-1 h/w composer state: h/w composer present and enabled Hardware Composer state (version 01020000): mDebugForceFakeVSync=0 Display[0] configurations (* current): * 0: 768x1280, xdpi=319.790009, ydpi=318.744995, refresh=16666667 numHwLayers=3, flags=00000000 type | handle | hint | flag | tr | blnd | format | source crop (l,t,r,b) | frame | name -----------+----------+------+------+----+------+-------------+--------------------------------+------------------------+------ HWC | b8878638 | 0002 | 0000 | 04 | 0100 | ? 00000011 | 0, 0, 640, 480 | 0, 0, 768, 1024 | SurfaceView HWC | b88a6110 | 0002 | 0000 | 00 | 0105 | RGBA_8888 | 0, 0, 768, 1280 | 0, 0, 768, 1280 | co.pumpup.app/co.pumpup.app.Activities.CameraEditorActivity FB TARGET | b8911608 | 0000 | 0000 | 00 | 0105 | RGBA_8888 | 0, 0, 768, 1280 | 0, 0, 768, 1280 | HWC_FRAMEBUFFER_TARGET Qualcomm HWC state: MDPVersion=440 DisplayPanel=8 HWC Map for Dpy: "PRIMARY" PREV_FRAME: layerCount: 2 mdpCount: 2 cacheCount: 0 CURR_FRAME: layerCount: 2 mdpCount: 2 fbCount: 0 needsFBRedraw: NO pipesUsed: 2 MaxPipesPerMixer: 4 --------------------------------------------- listIdx | cached? | mdpIndex | comptype | Z --------------------------------------------- 0 | NO | 0 | MDP | 0 1 | NO | 1 | MDP | 1 Overlay State ========================== Ctrl(mdp_overlay) id=1 z=1 fg=0 alpha=255 mask=-1 flags=0x60000 src(msmfb_img) w=768 h=1280 format=12 MDP_RGBA_8888 src_rect(mdp_rect) x=0 y=0 w=768 h=1280 dst_rect(mdp_rect) x=0 y=0 w=768 h=1280 Data(msmfb_overlay_data) id=1 data(msmfb_data) offset=0 memid=90 id=0 flags=0x0 priv=0 Attached to dpy=0 Ctrl(mdp_overlay) id=3 z=0 fg=0 alpha=255 mask=-1 flags=0x940000 src(msmfb_img) w=480 h=640 format=6 MDP_Y_CRCB_H2V2 src_rect(mdp_rect) x=0 y=0 w=480 h=640 dst_rect(mdp_rect) x=0 y=0 w=768 h=1024 Data(msmfb_overlay_data) id=3 data(msmfb_data) offset=462848 memid=123 id=0 flags=0x0 priv=0 Attached to dpy=0 Pipes used=2 MdpRotCtrl(msm_rotator_img_info) sessid=3966423424 rot=4, enable=1 downscale=0 src w=640 h=480 format=6 MDP_Y_CRCB_H2V2 dst w=480 h=640 format=6 MDP_Y_CRCB_H2V2 src_rect x=0 y=0 w=640 h=480 MdpRotData(msm_rotator_data_info) sessid=3966423424 verkey=0 src offset=0 memid=98 id=0 flags=0x0 priv=0 dst offset=462848 memid=123 id=0 flags=0x0 priv=0 src_chroma offset=0 memid=0 id=0 flags=0x0 priv=0 dst_chroma offset=0 memid=0 id=0 flags=0x0 priv=0 ================ Allocated buffers: 0xb8862b88: 288.00 KiB | 768 ( 768) x 96 | 1 | 0x00000900 0xb88642e8: 3840.00 KiB | 768 ( 768) x 1280 | 1 | 0x00001a00 0xb8868488: 3840.00 KiB | 768 (1024) x 1280 | 3 | 0x00000900 0xb886c8a0: unknown | 640 ( 640) x 480 | 11 | 0x50020900 0xb8873348: 150.00 KiB | 768 ( 768) x 50 | 1 | 0x00000900 0xb88773c8: 150.00 KiB | 768 ( 768) x 50 | 1 | 0x00000900 0xb8878160: unknown | 640 ( 640) x 480 | 11 | 0x50020900 0xb88785f0: unknown | 640 ( 640) x 480 | 11 | 0x50020900 0xb8878638: unknown | 640 ( 640) x 480 | 11 | 0x50020900 0xb8879b08: unknown | 640 ( 640) x 480 | 11 | 0x50020900 0xb88a6110: 3840.00 KiB | 768 ( 768) x 1280 | 1 | 0x00000900 0xb88c3308: unknown | 640 ( 640) x 480 | 11 | 0x50020900 0xb88c5138: 288.00 KiB | 768 ( 768) x 96 | 1 | 0x00000900 0xb88ed258: 3840.00 KiB | 768 ( 768) x 1280 | 1 | 0x00000900 0xb88fdc40: 3840.00 KiB | 768 (1024) x 1280 | 3 | 0x00000900 0xb88fdf68: 288.00 KiB | 768 ( 768) x 96 | 1 | 0x00000900 0xb88fedf0: 3840.00 KiB | 768 (1024) x 1280 | 3 | 0x00000900 0xb88ff3d0: 3840.00 KiB | 768 ( 768) x 1280 | 1 | 0x00000900 0xb89000e0: unknown | 640 ( 640) x 480 | 11 | 0x50020900 0xb89004b8: 150.00 KiB | 768 ( 768) x 50 | 1 | 0x00000900 0xb8911608: 3840.00 KiB | 768 ( 768) x 1280 | 1 | 0x00001a00 Total allocated (estimate): 32034.00 KB
//摄像机逻辑

private void adjustAspectRatio() { List<Camera.Size> sizesOfPreviews = _camera.getParameters().getSupportedPreviewSizes(); Camera.Size size = getOptimalPreviewSize(sizesOfPreviews,Helper.screenWidthPX(_context),Helper.screenHeightPX(_context)); int cameraWidth = size.height; int cameraHeight = size.width; System.out.println("Optimal camera size is " + cameraWidth + " x " + cameraHeight); _camera.getParameters().setPreviewSize(cameraWidth, cameraHeight); _parentLayout.getLayoutParams().width = 768; _parentLayout.getLayoutParams().height = 1024; //_parentLayout.setAspectRatio((double)cameraWidth/cameraHeight); } private Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes, int w, int h) { final double ASPECT_TOLERANCE = 0.1; double targetRatio = (double) h / w; if (sizes == null) return null; Camera.Size optimalSize = null; double minDiff = Double.MAX_VALUE; int targetHeight = h; for (Camera.Size size : sizes) { double ratio = (double) size.height / size.width; if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue; if (Math.abs(size.height - targetHeight) < minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } if (optimalSize == null) { minDiff = Double.MAX_VALUE; for (Camera.Size size : sizes) { if (Math.abs(size.height - targetHeight) < minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } } return optimalSize; }

private void adjustAspectRatio（） { 列表大小预览=_camera.getParameters（）.getSupportedPreviewSizes（）； Camera.Size Size=getOptimalPreviewSize（sizeOffReviews，Helper.screenWidthPX（_上下文），Helper.screenHeightPX（_上下文））； int cameraWidth=size.height； int cameraHeight=size.width； System.out.println（“最佳摄像机尺寸为”+摄像机宽度+“x”+摄像机高度）； _camera.getParameters（）.setPreviewSize（cameraWidth，cameraHeight）； _parentLayout.getLayoutParams（）.width=768； _parentLayout.getLayoutParams（）.height=1024； //_parentLayout.setAspectRatio（（双）cameraWidth/cameraHeight）； } 私人相机。大小getOptimalPreviewSize（列表大小，整数w，整数h） { 最终双纵横比公差=0.1；双目标率=（双）高/低；如果（大小==null）返回null；照相机。大小优化大小=空； double minDiff=double.MAX_值； int targetHeight=h；用于（相机尺寸：尺寸）{ 双倍比率=（双倍）size.height/size.width； if（数学绝对值（比率-目标比率）>纵横比公差）继续； if（数学绝对值（尺寸高度-目标光）
使用
setFixedSize（）
在这里没有意义。它设置曲面本身的大小，而不是视图的大小，但对于摄影机预览，曲面的大小由来自摄影机的帧确定。使用adb shell dumpsys SurfaceFlinger在显示曲面时，将曲面的大小与SurfaceView窗口的大小进行比较（有关转储中HWC摘要的更多信息，请参阅）。请参阅Grafika的AspectFrameLayout或基于TextureView的视频播放器，了解纵横比校正。嗯，但这适用于95%的手机。但在Nexus6上，它不适用于背面摄像头，因此我的逻辑存在缺陷。nexus 6支持的最大预览大小为1920 x 1440，但将曲面设置为这些值会导致图像倾斜。我一直在看Grafika的东西，但我想我可以通过设置surfaceHolder的大小而不是frameLayout的大小来省去麻烦。有两种大小，“surface”大小和“view”大小
setFixedSize（）
设置曲面大小，这在绘制OpenGL ES或画布时非常有用，因为它设置了绘制到的缓冲区的大小。来自摄像机或解码视频的帧在不复制或修改的情况下传递，而不是按比例复制到缓冲区中，因此设置
private void adjustAspectRatio() { List<Camera.Size> sizesOfPreviews = _camera.getParameters().getSupportedPreviewSizes(); Camera.Size size = getOptimalPreviewSize(sizesOfPreviews,Helper.screenWidthPX(_context),Helper.screenHeightPX(_context)); int cameraWidth = size.height; int cameraHeight = size.width; System.out.println("Optimal camera size is " + cameraWidth + " x " + cameraHeight); _camera.getParameters().setPreviewSize(cameraWidth, cameraHeight); _parentLayout.getLayoutParams().width = 768; _parentLayout.getLayoutParams().height = 1024; //_parentLayout.setAspectRatio((double)cameraWidth/cameraHeight); } private Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes, int w, int h) { final double ASPECT_TOLERANCE = 0.1; double targetRatio = (double) h / w; if (sizes == null) return null; Camera.Size optimalSize = null; double minDiff = Double.MAX_VALUE; int targetHeight = h; for (Camera.Size size : sizes) { double ratio = (double) size.height / size.width; if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue; if (Math.abs(size.height - targetHeight) < minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } if (optimalSize == null) { minDiff = Double.MAX_VALUE; for (Camera.Size size : sizes) { if (Math.abs(size.height - targetHeight) < minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } } return optimalSize; }