问题
I make some camera App use camera2 APi example camera2 api google sample, so my camera output not full screen
then i read from camera2 api isue to solve that i have to change this in Onmeasure at AUtofitTextureView class:
if (width < height * mRatioWidth / mRatioHeight) {
from < to > so like here :
if (width > height * mRatioWidth / mRatioHeight) {
then my camera view fix to fullscreen
but Now i have other issue, my capture image is bigger than my preview.
please check my screen capture from my app
- my camera preview not full screen
- my capture image if camera preview not full screen
3. my camera preview Full screen after change on Meisure method
- my capture image from camera preview after change on Meisure method.
the problem is that make my capture image not same with my camera preview
回答1:
I have tried by the following way, here is shared my code for maintaining the aspect ratio of 16:9,18:9,19:9.hope this answer will help, based on the device resolution choice ArrayList have max to min resolution this is the way I resolve the preview stretch issue.
//Samsung-S6-choices[0]
//Samsung-S7-edge-choices[6]
//OnePlus-5T-choices[15]
/*
* Given {@code choices} of {@code Size}s supported by a camera, chooses the smallest one whose
* width and height are at least as large as the respective requested values, and whose aspect
* ratio matches with the specified value.
*
* @param choices The list of sizes that the camera supports for the intended output class
* @param width The minimum desired width
* @param height The minimum desired height
* @param aspectRatio The aspect ratio
* @return The optimal {@code Size}, or an arbitrary one if none were big enough
*/
private Size chooseOptimalSize(Size[] choices, int width, int height, Size aspectRatio) {
// Collect the supported resolutions that are at least as big as the preview Surface
List<Size> bigEnough = new ArrayList<>();
int w = aspectRatio.getWidth();
int h = aspectRatio.getHeight();
double ratio = (double) h / w;
int loopCounter=0;
for (Size size : choices) {
int orientation = getActivityContext.getResources().getConfiguration().orientation;
if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
//if((size.getWidth()/16) == (size.getHeight()/9) && size.getWidth() <=720) {
//if((size.getWidth()/16) == (size.getHeight()/9) && size.getWidth() <=3840 ) {
//if((size.getWidth()/16) == (size.getHeight()/9) && size.getWidth() <=5120 ) {//Retina 5K
if((size.getWidth()/16) == (size.getHeight()/9) && size.getWidth() <=7680 ) {//8K UHDTV Super Hi-Vision
Log.e(TAG1, "chooseOptimalSize:"+size);
return size;
}
} else {
Log.e(TAG1, "chooseOptimalSize:--given--"+size);
DisplayMetrics metrics = getActivityContext.getResources().getDisplayMetrics();
float mCameraAspectRatio = ((float)metrics.heightPixels / (float)metrics.widthPixels);
Log.e(TAG1, "chooseOptimalSize:--AspectRatio--"+mCameraAspectRatio);
if((size.getWidth()/16) == (size.getHeight()/9) && ((size.getWidth() <=1280)||(size.getHeight()<=1920))) {
//if((size.getWidth()/16) == (size.getHeight()/9) && (size.getWidth() <=4320 ) ) {//8K UHDTV Super Hi-Vision
//if((size.getWidth()/16) == (size.getHeight()/9) && (size.getWidth() <=2880 ) ) {//Retina 5K
//if((size.getWidth()/16) == (size.getHeight()/9) && (size.getWidth() <=2160 ) ) {
//if((size.getWidth()/16) == (size.getHeight()/9) && (size.getWidth() <=1280 ) ) {
//if((size.getWidth()/16) == (size.getHeight()/9) && (size.getWidth() <=4480 && size.getWidth() >=1280) ) {
Log.e(TAG1, "chooseOptimalSize:"+size+"-16:9");
return size;
}else if((size.getWidth()/18) == (size.getHeight()/9) && ((size.getWidth() <=3840)||(size.getHeight()<=2160))) {
Log.e(TAG1, "chooseOptimalSize:"+size+"-18:9");
return size;
}else if((size.getWidth()/18.5) == (size.getHeight()/9) && ((size.getWidth() <=3840)||(size.getHeight()<=2160))) {
Log.e(TAG1, "chooseOptimalSize:"+size+"-18.5:9");
return size;
}else if((size.getWidth()/19) == (size.getHeight()/9) && ((size.getWidth() <=3840)||(size.getHeight()<=2160))) {
Log.e(TAG1, "chooseOptimalSize:"+size+"-19:9");
return size;
}else if((size.getWidth()/19.5) == (size.getHeight()/9) && ((size.getWidth() <=3840)||(size.getHeight()<=2160))) {
Log.e(TAG1, "chooseOptimalSize:"+size+"-19.5:9");
return size;
}else{
Log.e(TAG1, "chooseOptimalSize"+" not proper aspect resolution");
Log.e(TAG1, "chooseOptimalSize"+" ---=>Width---=>"+size.getWidth());
Log.e(TAG1, "chooseOptimalSize"+" ---=>Height---=>"+size.getHeight());
}
//2340
}
if(screenWidth==size.getWidth()){
Log.e(TAG1, loopCounter+".choose:width Matched:"+screenWidth+"="+size.getWidth());
}else{
Log.e(TAG1, loopCounter+".choose:width Not Matched:"+screenWidth+"="+size.getWidth());
}
if(screenHeight==size.getHeight()){
Log.e(TAG1, loopCounter+".choose:height Matched:"+screenHeight+"="+size.getHeight());
}else{
Log.e(TAG1, loopCounter+".choose:height Not Matched:"+screenHeight+"="+size.getHeight());
}
loopCounter++;
}
// Pick the smallest of those, assuming we found any
if (bigEnough.size() > 0) {
return Collections.min(bigEnough, new CompareSizesByArea());
} else {
Log.e(TAG1, "Couldn't find any suitable preview size");
return choices[0];
}
}
/*
* Compares two {@code Size}s based on their areas.
*/
static class CompareSizesByArea implements Comparator<Size> {
@Override
public int compare(Size lhs, Size rhs) {
// We cast here to ensure the multiplications won't overflow
return Long.signum((long) lhs.getWidth() * lhs.getHeight() -
(long) rhs.getWidth() * rhs.getHeight());
}
}
Hope it will help, please leave a comment, in case of any issue.
回答2:
i solve this isuue by : 1. change Autovit Textture view from > to < 2. remove call method mTexttureview.setaspectrasio() 3. change method getOptimalSize to new Method Like this :
private static Size chooseVideoSize(Size[] choices) {
for (Size size : choices) {
if (size.getWidth() == size.getHeight() * 4 / 3 && size.getWidth() <= 1080) {
return size;
}
}
Log.e(TAG, "Couldn't find any suitable video size");
return choices[choices.length - 1];
}
and change mPreviewSize = to like this
mPreviewSize = chooseVideoSize(map.getOutputSizes(SurfaceTexture.class));
来源：https://stackoverflow.com/questions/53957388/camera2-api-issue