我使用这个作为一个例子,它工作得很好(相机api,而不是camera2): http://examples.javacodegeeks.com/android/core/hardware/camera-hardware/android-camera-example/
但是,我怎么能实现放大/缩小使用两个按钮像+和- ?!?已经找了几个小时了,还是一无所获。
非常感谢。
试试下面的代码,应该会有帮助:-
case MotionEvent.ACTION_MOVE:
if (mode == ZOOM) {
float newDist = spacing(event);
double zoomDist = newDist-oldDist;
if(zoomDist > 0){
if(zoomDist > 50 && zoomDist <= 200){
if (curZoomLevel < mZoomMax && gestureZoom == 0) {
gestureZoom ++;
GestureZoomIn();
}
}else if(zoomDist > 200 && zoomDist <= 300){
if (curZoomLevel < mZoomMax && gestureZoom == 1) {
gestureZoom ++;
GestureZoomIn();
}
}else if(zoomDist > 300 && zoomDist <= 400){
if (curZoomLevel < mZoomMax && gestureZoom == 2) {
gestureZoom++;
GestureZoomIn();
}
//zoomin
private void GestureZoomIn(){
if (mParameters.isZoomSupported()){
mZoomMax = mParameters.getMaxZoom();
if (zoom_text_value<mZoomMax) {
zoom_text_value++;
curZoomLevel++;
zoom_float=zoom_float+0.5;
onZoomValueChanged(curZoomLevel);
//zoomout
private void GestureZoomOut(){
if (mParameters.isZoomSupported()){
if (0<zoom_text_value) {
zoom_text_value--;
curZoomLevel--;
zoom_float=zoom_float-0.5;
onZoomValueChanged(curZoomLevel);
谢谢