/** 焦点放大 */
public void zoomIn() {
if (camera != null && camera.getParameters().isZoomSupported()) {
Camera.Parameters parameters = camera.getParameters();
if (parameters.getZoom() >= parameters.getMaxZoom()) {
return;
}
parameters.setZoom(parameters.getZoom() + 1);
camera.setParameters(parameters);
}
}
/** 焦点放小 */
public void zoomOut() {
if (camera != null && camera.getParameters().isZoomSupported()) {
Camera.Parameters parameters = camera.getParameters();
if (parameters.getZoom() <= 0) {
return;
}
parameters.setZoom(parameters.getZoom() - 1);
camera.setParameters(parameters);
}
}
public int doZoom(float scale) {
synchronized (mCameraLock) {
if (mCamera == null) {
return 0;
}
int currentZoom = 0;
int maxZoom;
Camera.Parameters parameters = mCamera.getParameters();
if (!parameters.isZoomSupported()) {
Log.w(TAG, mContext.getString(R.string.zoom_not_supported));
return currentZoom;
}
maxZoom = parameters.getMaxZoom();
currentZoom = parameters.getZoom() + 1;
float newZoom;
if (scale > 1) {
newZoom = currentZoom + scale * (maxZoom / 10);
} else {
newZoom = currentZoom * scale;
}
currentZoom = Math.round(newZoom) - 1;
if (currentZoom < 0) {
currentZoom = 0;
} else if (currentZoom > maxZoom) {
currentZoom = maxZoom;
}
parameters.setZoom(currentZoom);
mCamera.setParameters(parameters);
return currentZoom;
}
}
public void zoom(int step) {
Camera.Parameters parameters = mCamera.getParameters();
if (!parameters.isZoomSupported()) return;
int zoom = parameters.getZoom() + step;
if (zoom > parameters.getMaxZoom()) zoom = parameters.getMaxZoom();
else if (zoom < 0) zoom = 0;
parameters.setZoom(zoom);
String str = parameters.getZoomRatios().get(zoom) + "%";
zoomText.setText(str);
mCamera.setParameters(parameters);
}
private void initCameraParameters() {
Camera.Parameters parameters = mCamera.getParameters();
String mod = Build.MODEL;
if (Build.VERSION.SDK_INT >= 8) {
// MZ 180， other 90...
if ("M9".equalsIgnoreCase(mod) || "MX".equalsIgnoreCase(mod)) {
setDisplayOrientation(mCamera, 180);
} else {
setDisplayOrientation(mCamera, 90);
}
} else {
parameters.set("orientation", "portrait");
parameters.set("rotation", 90);
}
if (cameraCurrentlyLocked == CameraInfo.CAMERA_FACING_FRONT) {
ismCameraCanFlash = false;
} else {
ismCameraCanFlash = true;
}
if (!ismCameraCanFlash) {
mBtnFlash1.setVisibility(View.INVISIBLE);
mBtnFlash2.setVisibility(View.INVISIBLE);
mBtnFlash3.setVisibility(View.INVISIBLE);
} else {
mBtnFlash1.setVisibility(View.VISIBLE);
}
List<String> focusModes = parameters.getSupportedFocusModes();
if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
// Autofocus mode is supported
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
}
if (parameters.isZoomSupported()) {
parameters.setZoom(parameters.getZoom()); // 测试通过
}
Camera.Size previewSize = getFitParametersSize(parameters.getSupportedPreviewSizes());
parameters.setPreviewSize(previewSize.width, previewSize.height);
Camera.Size pictureSize = getFitParametersSize(parameters.getSupportedPictureSizes());
parameters.setPictureSize(pictureSize.width, pictureSize.height);
try {
mCamera.setParameters(parameters);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void setZoom(Camera.Parameters parameters, double targetZoomRatio) {
if (parameters.isZoomSupported()) {
Integer zoom = indexOfClosestZoom(parameters, targetZoomRatio);
if (zoom == null) {
return;
}
if (parameters.getZoom() == zoom) {
Log.i(TAG, "Zoom is already set to " + zoom);
} else {
Log.i(TAG, "Setting zoom to " + zoom);
parameters.setZoom(zoom);
}
} else {
Log.i(TAG, "Zoom is not supported");
}
}