我在游戏中设置缩放效果时遇到了问题。我的Stage对象由ScrollPane填充，其中Table包含Actor's个stage.getCamera().zoom。我希望可以使用手势放大和缩小该表的元素（并且滚动条调整到其新大小）。我已尝试使用package invisiblevideorecorder;
import android.content.Context;
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraCaptureSession;
import android.hardware.camera2.CameraDevice;
import android.hardware.camera2.CameraManager;
import android.hardware.camera2.CameraMetadata;
import android.hardware.camera2.CaptureRequest;
import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.os.Environment;
import android.os.Handler;
import android.os.HandlerThread;
import android.util.Log;
import android.view.Surface;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
/**
* @author Mark
* @since 6/10/2016
*/
public class InvisibleVideoRecorder {
private static final String TAG = "InvisibleVideoRecorder";
private final CameraCaptureSessionStateCallback cameraCaptureSessionStateCallback = new CameraCaptureSessionStateCallback();
private final CameraDeviceStateCallback cameraDeviceStateCallback = new CameraDeviceStateCallback();
private MediaRecorder mediaRecorder;
private CameraManager cameraManager;
private Context context;
private CameraDevice cameraDevice;
private HandlerThread handlerThread;
private Handler handler;
public InvisibleVideoRecorder(Context context) {
this.context = context;
handlerThread = new HandlerThread("camera");
handlerThread.start();
handler = new Handler(handlerThread.getLooper());
try {
mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
final String filename = context.getExternalFilesDir(Environment.DIRECTORY_MOVIES).getAbsolutePath() + File.separator + System.currentTimeMillis() + ".mp4";
mediaRecorder.setOutputFile(filename);
Log.d(TAG, "start: " + filename);
// by using the profile, I don't think I need to do any of these manually:
// mediaRecorder.setVideoEncodingBitRate(16000000);
// mediaRecorder.setVideoFrameRate(30);
// mediaRecorder.setCaptureRate(30);
// mediaRecorder.setVideoSize(1920, 1080);
// mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
// mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
// Log.d(TAG, "start: 1 " + CamcorderProfile.hasProfile(CameraMetadata.LENS_FACING_BACK, CamcorderProfile.QUALITY_1080P));
// true
// Log.d(TAG, "start: 2 " + CamcorderProfile.hasProfile(CameraMetadata.LENS_FACING_BACK, CamcorderProfile.QUALITY_HIGH_SPEED_1080P));
// false
// Log.d(TAG, "start: 3 " + CamcorderProfile.hasProfile(CameraMetadata.LENS_FACING_BACK, CamcorderProfile.QUALITY_HIGH));
// true
CamcorderProfile profile = CamcorderProfile.get(CameraMetadata.LENS_FACING_BACK, CamcorderProfile.QUALITY_1080P);
Log.d(TAG, "start: profile " + ToString.inspect(profile));
// start: 0 android.media.CamcorderProfile@114016694 {
// audioBitRate: 256000
// audioChannels: 2
// audioCodec: 3
// audioSampleRate: 48000
// duration: 30
// fileFormat: 2
// quality: 6
// videoBitRate: 17000000
// videoCodec: 2
// videoFrameHeight: 1080
// videoFrameRate: 30
// videoFrameWidth: 1920
// }
mediaRecorder.setOrientationHint(0);
mediaRecorder.setProfile(profile);
mediaRecorder.prepare();
} catch (IOException e) {
Log.d(TAG, "start: exception" + e.getMessage());
}
}
public void start() {
Log.d(TAG, "start: ");
cameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
try {
cameraManager.openCamera(String.valueOf(CameraMetadata.LENS_FACING_BACK), cameraDeviceStateCallback, handler);
} catch (CameraAccessException | SecurityException e) {
Log.d(TAG, "start: exception " + e.getMessage());
}
}
public void stop() {
Log.d(TAG, "stop: ");
mediaRecorder.stop();
mediaRecorder.reset();
mediaRecorder.release();
cameraDevice.close();
try {
handlerThread.join();
} catch (InterruptedException e) {
}
}
private class CameraCaptureSessionStateCallback extends CameraCaptureSession.StateCallback {
private final static String TAG = "CamCaptSessionStCb";
@Override
public void onActive(CameraCaptureSession session) {
Log.d(TAG, "onActive: ");
super.onActive(session);
}
@Override
public void onClosed(CameraCaptureSession session) {
Log.d(TAG, "onClosed: ");
super.onClosed(session);
}
@Override
public void onConfigured(CameraCaptureSession session) {
Log.d(TAG, "onConfigured: ");
}
@Override
public void onConfigureFailed(CameraCaptureSession session) {
Log.d(TAG, "onConfigureFailed: ");
}
@Override
public void onReady(CameraCaptureSession session) {
Log.d(TAG, "onReady: ");
super.onReady(session);
try {
CaptureRequest.Builder builder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_RECORD);
builder.addTarget(mediaRecorder.getSurface());
CaptureRequest request = builder.build();
session.setRepeatingRequest(request, null, handler);
mediaRecorder.start();
} catch (CameraAccessException e) {
Log.d(TAG, "onConfigured: " + e.getMessage());
}
}
@Override
public void onSurfacePrepared(CameraCaptureSession session, Surface surface) {
Log.d(TAG, "onSurfacePrepared: ");
super.onSurfacePrepared(session, surface);
}
}
private class CameraDeviceStateCallback extends CameraDevice.StateCallback {
private final static String TAG = "CamDeviceStateCb";
@Override
public void onClosed(CameraDevice camera) {
Log.d(TAG, "onClosed: ");
super.onClosed(camera);
}
@Override
public void onDisconnected(CameraDevice camera) {
Log.d(TAG, "onDisconnected: ");
}
@Override
public void onError(CameraDevice camera, int error) {
Log.d(TAG, "onError: ");
}
@Override
public void onOpened(CameraDevice camera) {
Log.d(TAG, "onOpened: ");
cameraDevice = camera;
try {
camera.createCaptureSession(Arrays.asList(mediaRecorder.getSurface()), cameraCaptureSessionStateCallback, handler);
} catch (CameraAccessException e) {
Log.d(TAG, "onOpened: " + e.getMessage());
}
}
}
}
，但它会改变我不想要的整个ScrollPane的大小。我提出了改变该表中所有演员的大小的想法，但是我不确定它是否是最有效的方式。有人可以帮我这个吗？
答案 0 :(得分：1)
我认为最好的方法是，就像你说的那样，在滚动窗格中更改表格的大小。我实际上最终扩展了堆栈并改变了堆栈中表的规模，然后我有了另一个实际大小的表。我需要为我的应用程序：
public ZoomableStack() {
imageTable = new Table();
sizeTable = new Table();
this.add(imageTable);
this.add(sizeTable);
layout();
imageTable.setTransform(true);
}
获取表格的缩放尺寸：
@Override
public float getPrefWidth() {
return imageTable.getWidth() * imageTable.getScaleX();
}
@Override
public float getPrefHeight() {
return imageTable.getHeight() * imageTable.getScaleY();
}
覆盖布局方法，如下所示：
@Override
public void layout() {
float width = this.getWidth();
float height = this.getHeight();
imageTable.setSize(imageTable.getPrefWidth(), imageTable.getPrefHeight());
float tableWidth = imageTable.getWidth();
float tableHeight = imageTable.getHeight();
imageTable.setOrigin(tableWidth / 2, tableHeight / 2);
imageTable.setPosition((width / 2 - (tableWidth / 2)), (height / 2 - (tableHeight / 2)));
sizeTable.setBounds(((width - getPrefWidth()) / 2), ((height - getPrefHeight()) / 2), getPrefWidth(), getPrefHeight());
}
您可能需要覆盖setCullingArea（），因为该表最终会比屏幕大，然后表中的所有actor都会消失：
@Override
public void setCullingArea(Rectangle cullingArea) {
}
然后创建缩放方法，调用invalidateHierarchy（）：
public void zoom(float amount) {
imageTable.scaleBy(amount);
invalidateHierarchy();
}
然后，您只需将堆栈添加到滚动窗格并使用缩放：
ZoomableStack zoomableStack = new ZoomableStack();
new ScrollPane(zoomableStack);
zoomableStack.zoom(speed * amount);