Java CameraUtil.openCamera方法代码示例

import com.android.camera.util.CameraUtil; //导入方法依赖的package包/类
/**
 * Opens the camera device.
 *
 * @return Whether the camera was opened successfully.
 */
private boolean prepareCamera() {
    // We need to check whether the activity is paused before long
    // operations to ensure that onPause() can be done ASAP.
    mCameraDevice = CameraUtil.openCamera(
            mActivity, mCameraId, mHandler,
            mActivity.getCameraOpenErrorCallback());
    if (mCameraDevice == null) {
        Log.e(TAG, "Failed to open camera:" + mCameraId);
        return false;
    }
    mParameters = mCameraDevice.getParameters();

    initializeCapabilities();
    if (mFocusManager == null) initializeFocusManager();
    setCameraParameters(UPDATE_PARAM_ALL);
    mHandler.sendEmptyMessage(CAMERA_OPEN_DONE);
    mCameraPreviewParamsReady = true;
    startPreview();
    mOnResumeTime = SystemClock.uptimeMillis();
    checkDisplayRotation();
    return true;
}
 

import com.android.camera.util.CameraUtil; //导入方法依赖的package包/类
/**
 * Opens the camera device. The back camera has priority over the front
 * one.
 *
 * @return Whether the camera was opened successfully.
 */
private boolean openCamera() {
    int cameraId = CameraHolder.instance().getBackCameraId();
    // If there is no back camera, use the first camera. Camera id starts
    // from 0. Currently if a camera is not back facing, it is front facing.
    // This is also forward compatible if we have a new facing other than
    // back or front in the future.
    if (cameraId == -1) cameraId = 0;
    mCameraDevice = CameraUtil.openCamera(mActivity, cameraId,
            mMainHandler, mActivity.getCameraOpenErrorCallback());
    if (mCameraDevice == null) {
        return false;
    }
    mCameraOrientation = CameraUtil.getCameraOrientation(cameraId);
    if (cameraId == CameraHolder.instance().getFrontCameraId()) mUsingFrontCamera = true;
    return true;
}
 

import com.android.camera.util.CameraUtil; //导入方法依赖的package包/类
private void switchCamera() {
    if (mPaused) return;

    Log.v(TAG, "Start to switch camera. id=" + mPendingSwitchCameraId);
    mCameraId = mPendingSwitchCameraId;
    mPendingSwitchCameraId = -1;
    setCameraId(mCameraId);

    // from onPause
    closeCamera();
    mUI.collapseCameraControls();
    mUI.clearFaces();
    if (mFocusManager != null) mFocusManager.removeMessages();

    // Restart the camera and initialize the UI. From onCreate.
    mPreferences.setLocalId(mActivity, mCameraId);
    CameraSettings.upgradeLocalPreferences(mPreferences.getLocal());
    mCameraDevice = CameraUtil.openCamera(
            mActivity, mCameraId, mHandler,
            mActivity.getCameraOpenErrorCallback());
    if (mCameraDevice == null) {
        Log.e(TAG, "Failed to open camera:" + mCameraId + ", aborting.");
        return;
    }
    mParameters = mCameraDevice.getParameters();
    initializeCapabilities();
    CameraInfo info = CameraHolder.instance().getCameraInfo()[mCameraId];
    mMirror = (info.facing == CameraInfo.CAMERA_FACING_FRONT);
    mFocusManager.setMirror(mMirror);
    mFocusManager.setParameters(mInitialParams);
    setupPreview();

    // reset zoom value index
    mZoomValue = 0;
    openCameraCommon();

    // Start switch camera animation. Post a message because
    // onFrameAvailable from the old camera may already exist.
    mHandler.sendEmptyMessage(SWITCH_CAMERA_START_ANIMATION);
}
 

import com.android.camera.util.CameraUtil; //导入方法依赖的package包/类
private void openCamera() {
    if (mCameraDevice == null) {
        mCameraDevice = CameraUtil.openCamera(
                mActivity, mCameraId, mHandler,
                mActivity.getCameraOpenErrorCallback());
    }
    if (mCameraDevice == null) {
        // Error.
        return;
    }
    mParameters = mCameraDevice.getParameters();
}