質問編集履歴

ソースコードの編集

2019/10/07 15:01

投稿

sekaikan_ozaki

スコア65

test CHANGED Viewed

File without changes

test CHANGED Viewed

@@ -36,8 +36,6 @@
 ズームの方法として，ScaleGestureDetectorを実装して，textureViewを大きくしたり，小さくしたりすることはできています．
@@ -46,32 +44,18 @@
 ScaleListenerクラスの中で，スケールに応じてbitmapを変更すればよいのでしょうか？？
-どなた様かご教授お願い致します．
-以下がソースコードになります．
 ```java
-package com.example.camera2api ;
 public class MainActivity extends AppCompatActivity {
     private Camera mCamera;
     private float scale = 1f;
     private ScaleGestureDetector detector;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -88,8 +72,6 @@
         TextureView textureView = (TextureView) findViewById(R.id.texture_view);
         textureView.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {
@@ -102,14 +84,10 @@
             }
             @Override
             public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {}
             @Override
             public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
@@ -144,8 +122,6 @@
-    //スケールリスナークラス
     private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
         @Override
@@ -158,32 +134,20 @@
             mCamera.mTextureView.setScaleY(scale);
+            mCamera.changeZoomLevel(2);
             return true;
         }
     }
     @Override
     protected void onResume() {
         super.onResume();
         Button button = (Button) findViewById(R.id.button);
         button.setOnClickListener(new View.OnClickListener() {
@@ -192,8 +156,6 @@
             public void onClick(View v) {
                 Bitmap bitmap = mCamera.mTextureView.getBitmap();
                 int bitmapWidth = bitmap.getWidth();
@@ -204,17 +166,11 @@
                 Log.d("debug", "bitmapHeight:" + bitmapHeight);
                 try{
-                    // 読み書きするファイル名を指定
                     File resultFile = new File(Environment.getExternalStorageDirectory().getPath() + "/DCIM/" + "capture.jpeg");
-                    resultFile.getParentFile().mkdir();// 指定したファイル名が無ければ作成する
+                    resultFile.getParentFile().mkdir();
                     String resultFilepath = resultFile.getPath();
@@ -234,36 +190,12 @@
                 }
             }
         });
     }
-    //カメラクラス
     class Camera {
         private CameraDevice mCamera;
@@ -276,6 +208,16 @@
         private CameraCaptureSession mPreviewSession;
+        private int mCurrentZoomLevel = 1;
+        private Rect mCropRegion;
+        private CameraManager manager;
+        private CameraCharacteristics characteristics;
         private CameraDevice.StateCallback mCameraDeviceCallback = new CameraDevice.StateCallback() {
@@ -342,25 +284,21 @@
         };
         public Camera(TextureView textureView) {
             mTextureView = textureView;
         }
         public void open() {
             try {
-                CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
+                manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
                 for (String cameraId : manager.getCameraIdList()) {
-                    CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId);
+                    characteristics = manager.getCameraCharacteristics(cameraId);
                     if (characteristics.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_BACK) {
@@ -370,6 +308,10 @@
+                        Log.d("debug", "cameraId:" + cameraId);
                         manager.openCamera(cameraId, mCameraDeviceCallback, null);
@@ -412,6 +354,8 @@
             Surface surface = new Surface(texture);
             try {
                 mPreviewBuilder = mCamera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
@@ -438,12 +382,102 @@
         }
+        public void changeZoomLevel(int level) {
+            // cameraId = 対象のカメラID
+            Log.d("debug", "changeZoomLevel()が呼ばれました");
+            try {
+                manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
+                //CameraCharacteristics characteristics;
+                for (String cameraId : manager.getCameraIdList()) {
+                    characteristics = manager.getCameraCharacteristics(cameraId);
+                    if (characteristics.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_BACK) {
+                        StreamConfigurationMap map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
+                        mCameraSize = map.getOutputSizes(SurfaceTexture.class)[4];
+                        Log.d("debug", "cameraId:" + cameraId);
+                    }
+                }
+            } catch (CameraAccessException e) {
+                e.printStackTrace();
+            }
+            // 最大ズームサイズ
+            float max = characteristics.get(CameraCharacteristics.SCALER_AVAILABLE_MAX_DIGITAL_ZOOM);
+            if ((int) max < level || mCurrentZoomLevel == level) {
+                return;
+            }
+            Log.d("debug", "max:" + max);
+            mCurrentZoomLevel = level;
+            final Rect activeArraySize = characteristics.get(CameraCharacteristics.SENSOR_INFO_ACTIVE_ARRAY_SIZE);
+            if (mCurrentZoomLevel == 1) {
+                mCropRegion.set(activeArraySize);
+                Log.d("debug", "mCurrentZoomLevel:" + mCurrentZoomLevel);
+            } else {
+                Log.d("debug", "mCurrentZoomLevel:" + mCurrentZoomLevel);
+                //noinspection ConstantConditions
+                int cx = activeArraySize.centerX();
+                int cy = activeArraySize.centerY();
+                int hw = (activeArraySize.width() >> 1) / mCurrentZoomLevel;
+                int hh = (activeArraySize.height() >> 1) / mCurrentZoomLevel;
+                mCropRegion = new Rect(cx - hw, cy - hh, cy - hh, cy + hh);
+            }
+        }
         private void updatePreview() {
             mPreviewBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
+            mPreviewBuilder.set(CaptureRequest.SCALER_CROP_REGION, mCropRegion);
             HandlerThread thread = new HandlerThread("CameraPreview");
             thread.start();
@@ -464,72 +498,8 @@
         }
     }
 }
 ```
-```xml
-<?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".MainActivity">
-    <TextureView
-        android:id="@+id/texture_view"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent" />
-    <Button
-        android:id="@+id/button"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toRightOf="parent"/>
-</android.support.constraint.ConstraintLayout>
-```