10.0去掉前置摄像头闪光灯功能.zip

在做展讯平板开发的时候，突然发现前置摄像头闪光灯打开时，拍照会白屏一下，然后拍照保存到相册 ，应该是闪光灯的bug.鉴于Camera2有点难调 所以就觉得前置摄像头去掉闪光灯功能 Camera2 app的路径为: vendor\sprd\platform\packages\apps\DreamCamera2 而PhotoModule.java作为拍照的Module类 就先从这里寻找解决入口 vendor/sprd/platform/packages/apps/DreamCamera2/src/com/android/camera/PhotoModule.java 先看代码分析问题先: /** * The start/stop preview should only run on the UI thread. */ protected void startPreview(boolean optimize) { if (mCameraDevice == null) { Log.i(TAG, "attempted to start preview before camera device"); // do nothing return; } if (!checkPreviewPreconditions()) { updateSettingAfterOpencamera(true); settingchange = true; return; } // ui /* SPRD: add for bug 380597: switch camera preview has a frame error @{ */ mActivity.getCameraAppUI().resetPreview(); /* @} */ if(settingchange){ settingchange = false; } else { updateSettingAfterOpencamera(optimize); } dosetPreviewDisplayspecial(); if (isUseSurfaceView()) { if (optimize) { mCameraDevice.setPreviewDisplay(mActivity.getCameraAppUI().getSurfaceHolder()); } else { mCameraDevice.setPreviewDisplayWithoutOptimize(mActivity.getCameraAppUI().getSurfaceHolder()); } } else { if (optimize) { mCameraDevice.setPreviewTexture(mActivity.getCameraAppUI().getSurfaceTexture()); } else { mCameraDevice.setPreviewTextureWithoutOptimize(mActivity.getCameraAppUI() .getSurfaceTexture()); } } if (CameraUtil.isSensorSelfShotEnable() || CameraUtil.getCurrentBackBlurRefocusVersion() == CameraUtil.BLUR_REFOCUS_VERSION_3 || isBackRealDualCamVersion() || CameraUtil.getCurrentBlurCoveredId() != CameraUtil.BLUR_COVERED_ID_OFF) { mCameraDevice.setSensorSelfShotCallback(mHandler, this); } // SPRD: Fix bug 677589 black preview occurs when we switch to video module from photo // no need to handle surface update in process of the second onPreviewStarted() final boolean handleSurfaceUpdate = !mPreviewing; // If we're using API2 in portability layers, don't use // startPreviewWithCallback() // b/17576554 CameraAgent.CameraStartPreviewCallback startPreviewCallback = new CameraAgent.CameraStartPreviewCallback() { @Override public void onPreviewStarted() { mHandler.post(new Runnable() { public void run() { mFocusManager.onPreviewStarted(); PhotoModule.this.onPreviewStarted(); } }); if (mSnapshotOnIdle) { mHandler.post(mDoSnapRunnable); } if(!isUseSurfaceView() || mHandler == null) { return; } if (!handleSurfaceUpdate) { return; } final Runnable hideModeCoverRunnable = new Runnable() { @Override public void run() { if (!mPaused) { final CameraAppUI cameraAppUI = mActivity.getCameraAppUI(); cameraAppUI.onSurfaceTextureUpdated(cameraAppUI.getSurfaceTexture()); cameraAppUI.pauseTextureViewRendering(); } } }; final Runnable takePictureRunnable = new Runnable() { @Override public void run() { if (!mPaused) { if (mActivity.getVoiceIntentCamera() && !mActivity.getOpenCameraOnly()) { mDataModuleCurrent .set(Keys.KEY_VOICE_COUNTDOWN_DURATION,mActivity.getTimeDurationS()); onShutterButtonClick(); setCaptureCount(0); } } } }; if (useNewApi()) { mCameraDevice.setSurfaceViewPreviewCallback( new CameraAgent.CameraSurfaceViewPreviewCallback() { @Override public void onSurfaceUpdate() { Log.d(TAG, "SurfaceView: CameraSurfaceViewPreviewCallback"); if (mPaused || mCameraDevice == null) {//SPRD:fix bug681598 return; } mActivity.getCameraAppUI().hideModeCover(); mHandler.post(hideModeCoverRunnable); Log.d(TAG,"Keys.KEY_VOICE_CAMERA_DONE is "+mDataModuleCurrent.getInt(Keys.KEY_VOICE_CAMERA_DONE,0)); if (mActivity.getVoiceIntentCamera() && mDataModuleCurrent.getInt(Keys.KEY_VOICE_CAMERA_DONE,0) != 1) { mHandler.post(takePictureRunnable); } // set callback to null mCameraDevice.setSurfaceViewPreviewCallback(null); } }); } else { mHandler.postDelayed(hideModeCoverRunnable, 450); } } }; doStartPreviewSpecial(isCameraIdle(), isHdr(), mActivity, mCameraDevice, mHandler, mDisplayOrientation, isCameraFrontFacing(), mUI.getRootView(), mCameraSettings);//SPRD:fix bug624871 doStartPreview(startPreviewCallback, mCameraDevice); if(getModuleTpye() != DreamModule.AUDIOPICTURE_MODULE||!isShutterClicked()) mAppController.getCameraAppUI().setBottomPanelLeftRightClickable(true); Log.i(TAG, "startPreview end!"); } 从上面代码中可以看到 在摄像头预览中回调中调用 doStartPreview(）; 这方法 接下来看doStartPreview(); protected void doStartPreview(CameraAgent.CameraStartPreviewCallback startPreviewCallback, CameraAgent.CameraProxy cameraDevice) { if (useNewApi()) { mCameraDevice.startPreview(); startPreviewCallback.onPreviewStarted(); } else { mCameraDevice.startPreviewWithCallback(new Handler(Looper.getMainLooper()), startPreviewCallback); } mPreviewing = true; // SPRD: Fix bug 659315, optimize camera launch time mUI.onPreviewStarted(); //SPRD: Fix bug 1200379 if(mUI instanceof ManualPhotoUI){ ((ManualPhotoUI) mUI).setManualControlEnable(true); } mActivity.getButtonManager().enableCameraButton();// SPRD: Fix bug839922, switch icon is disabled OrientationManager orientationManager = mAppController .getOrientationManager(); orientationManager.addOnOrientationChangeListener(this); mUI.onOrientationChanged(orientationManager, orientationManager.getDeviceOrientation()); } 而这里有调用了 PhotoUI 的onPreviewStarted()方法 路径为 ：vendor/sprd/platform/packages/apps/DreamCamera2/src/com/android/camera/PhotoUI.java public void onPreviewStarted() { long start = System.currentTimeMillis(); if (mHasDelayWorkO