質問編集履歴

ソースコードの編集

2019/12/23 02:50

投稿

sekaikan_ozaki

スコア65

test CHANGED Viewed

File without changes

test CHANGED Viewed

@@ -34,25 +34,101 @@
 ```java
+package com.example.textrecognizer;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Rect;
+import android.support.annotation.NonNull;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.util.Log;
+import android.util.SparseArray;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import com.google.android.gms.vision.CameraSource;
+import com.google.android.gms.vision.Detector;
+import com.google.android.gms.vision.text.TextBlock;
+import com.google.android.gms.vision.text.TextRecognizer;
+import java.io.FileOutputStream;
+import java.io.IOException;
-public final class MainActivity extends AppCompatActivity {
+public class MainActivity extends AppCompatActivity {
+    private SurfaceView mCameraView;
+    private TextView mTextView;
-private CameraSource cameraSource;
+    private CameraSource mCameraSource;
-~省略~
+    private TextRecognizer textRecognizer;
+    private CameraPermission cameraPermission;
-@Override
+    @Override
-    public void onCreate(Bundle bundle) {
+    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(bundle);
+        super.onCreate(savedInstanceState);
-        setContentView(R.layout.ocr_capture);
+        setContentView(R.layout.activity_main);
+        cameraPermission = new CameraPermission(this);
-        preview = (CameraSourcePreview) findViewById(R.id.preview);
+        mCameraView = findViewById(R.id.cameraView);
-        graphicOverlay = (GraphicOverlay<OcrGraphic>) findViewById(R.id.graphicOverlay);
+        mTextView = findViewById(R.id.text_view);
+        startCamera();
@@ -62,19 +138,315 @@
             @Override
-            public void onClick(View view) {
+            public void onClick(View v) {
+                Log.d("debug", "ボタンをクリックしました");
+                Canvas canvas = mCameraView.getHolder().lockCanvas();
+                //別途BitmapとCanvasを用意する
+                Bitmap bmp = Bitmap.createBitmap(mCameraView.getWidth(), mCameraView.getHeight(), Bitmap.Config.ARGB_8888);
+                Canvas tmpCanvas = new Canvas(bmp);
-                //ボタンを押すと、ビットマップを取得できるようにしたい。
+                //TODO tmpCanvasに対して描画処理を行う
+                Rect mScreenRect = new Rect(0, 0, mCameraView.getWidth(), mCameraView.getHeight());
+                tmpCanvas.drawBitmap(bmp, null, mScreenRect, null);
+                mCameraView.getHolder().unlockCanvasAndPost(canvas);
             }
+        }); // btnRead
+    }
+    // ファイルを保存
+    public void saveFile(String file, Bitmap bitmap) {
+        // try-with-resources
+        try (FileOutputStream fileOutputstream = openFileOutput(file,
+                Context.MODE_PRIVATE)) {
+            //bitmapをJpeg画像化
+            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fileOutputstream);
+            fileOutputstream.flush();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+    /**
+     * Starts camera source after camera permission is granted
+     *
+     * @param requestCode
+     * @param permissions
+     * @param grantResults
+     */
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        if (requestCode == cameraPermission.getCameraPermissionID()) {
+            if (cameraPermission.checkHasCameraPermission()) {
+                Log.i("onRequestResult", "Permission has been granted");
+                try {
+                    mCameraSource.start(mCameraView.getHolder());
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+    /**
+     * Gets TextBlock from TextRecognizer, set Text to TextView.
+     */
+    private void setDataToTextView() {
+        textRecognizer.setProcessor(new Detector.Processor<TextBlock>() {
+            @Override
+            public void receiveDetections(Detector.Detections<TextBlock> detections) {
+                final SparseArray<TextBlock> items = detections.getDetectedItems();
+                if (items.size() != 0) {
+                    mTextView.post(new Runnable() {
+                        @Override
+                        public void run() {
+                            //Gets strings from TextBlock and adds to StringBuilder
+                            final StringBuilder stringBuilder = new StringBuilder();
+                            for (int i = 0; i < items.size(); i++)
+                                stringBuilder.append(items.valueAt(i).getValue());
+                            mTextView.setText(stringBuilder.toString());
+                        }
+                    });
+                }
+            }
+            @Override
+            public void release() {
+            }
         });
+    }
+    /**
+     * Init camera source with needed properties,
+     * then set camera view to surface view.
+     * 必要なプロパティでカメラソースを初期化し、
+     * カメラビューをサーフェスビューに設定します。
+     */
+    private void startCamera() {
+        textRecognizer = new TextRecognizer.Builder(getApplicationContext()).build();
+        if (textRecognizer.isOperational()) {
+            mCameraSource = new CameraSource.Builder(getApplicationContext(), textRecognizer)
+                    .setFacing(CameraSource.CAMERA_FACING_BACK)
+                    .setRequestedPreviewSize(1280, 1024)
+                    .setAutoFocusEnabled(true)
+                    .setRequestedFps(30.0f)
+                    .build();
+            //If permission is granted cameraSource started and passed it to surfaceView
+            mCameraView.getHolder().addCallback(new SurfaceHolder.Callback() {
+                @Override
+                public void surfaceCreated(SurfaceHolder holder) {
+                    if (cameraPermission.checkHasCameraPermission()) {
+                        try {
+                            mCameraSource.start(mCameraView.getHolder());
+                        } catch (IOException e) {
+                            e.printStackTrace();
+                        }
+                    } else {
+                        Log.i("surfaceCreated", "Permission request sent");
+                        cameraPermission.requestCameraPermission();
+                    }
+                    Log.e(TAG, "surfaceCreated()");
+                }
+                @Override
+                public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
+                    Log.e(TAG, "surfaceChanged()");
+                }
+                @Override
+                public void surfaceDestroyed(SurfaceHolder holder) {
+                    mCameraSource.stop();
+                    Log.e(TAG, "surfaceDestroyed()");
+                }
+            });
+            setDataToTextView();
+            Log.e(TAG, "setDataToTextView()");
+        }
+    }
+    @Override
+    public void onPause() {
+        super.onPause();
+    }
+}
 ```
@@ -84,94 +456,82 @@
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/frameLayout"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:orientation="vertical"
+    android:weightSum="10">
+    <SurfaceView
+        android:id="@+id/cameraView"
+        android:scaleType="fitCenter"
+        android:layout_width="0dp"
-    android:keepScreenOn="true"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
-    android:fitsSystemWindows="false" >
+        app:layout_constraintTop_toTopOf="parent" />
-    <com.google.android.gms.samples.vision.ocrreader.ui.camera.CameraSourcePreview
+    <TextView
-        android:id="@+id/preview"
+        android:id="@+id/text_view"
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
-        <com.google.android.gms.samples.vision.ocrreader.ui.camera.GraphicOverlay
-            android:id="@+id/graphicOverlay"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"/>
-    </com.google.android.gms.samples.vision.ocrreader.ui.camera.CameraSourcePreview>
-    <androidx.constraintlayout.widget.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"
+        android:layout_height="50dp"
-        tools:context=".MainActivity">
+        android:gravity="bottom"
+        android:textColor="@android:color/white"
+        android:textSize="20sp"
+        android:textStyle="bold"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
-        <Button
+    <Button
-            android:id="@+id/button"
+        android:id="@+id/button"
-            android:text="Hello World!"
-            android:layout_width="wrap_content"
+        android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+        android:layout_height="wrap_content"
-            app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
-            app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintRight_toRightOf="parent" />
-            />
-    </androidx.constraintlayout.widget.ConstraintLayout>
+</android.support.constraint.ConstraintLayout>
-</FrameLayout>
 ```

質問の加筆修正

2019/12/23 02:50

投稿

sekaikan_ozaki

スコア65

test CHANGED Viewed

File without changes

test CHANGED Viewed

@@ -21,6 +21,8 @@
 SurfaceViewはgetBitmap()メソッドが存在しないようなので、別の方法でbitmapを取得できるのでしょうか？
 あれば教えていただきたいです。
+とにかくSurfaceViewのキャプチャ画像が取得できれば大成功です。