質問編集履歴
2
ソースコードの編集
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@@ -16,74 +16,254 @@
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以下に簡単なコードを載せます
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```java
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public final class MainActivity extends AppCompatActivity {
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private CameraSource cameraSource;
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~省略~
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@Override
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public void onCreate(Bundle bundle) {
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super.onCreate(bundle);
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setContentView(R.layout.ocr_capture);
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package com.example.textrecognizer;
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graphicOverlay = (GraphicOverlay<OcrGraphic>) findViewById(R.id.graphicOverlay);
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Rect;
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import android.support.annotation.NonNull;
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import android.support.v7.app.AppCompatActivity;
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import android.os.Bundle;
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import android.util.Log;
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import android.util.SparseArray;
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import android.view.SurfaceHolder;
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import android.view.SurfaceView;
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import android.view.View;
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import android.widget.Button;
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import android.widget.TextView;
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import com.google.android.gms.vision.CameraSource;
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import com.google.android.gms.vision.Detector;
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import com.google.android.gms.vision.text.TextBlock;
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import com.google.android.gms.vision.text.TextRecognizer;
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import java.io.FileOutputStream;
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import java.io.IOException;
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public class MainActivity extends AppCompatActivity {
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private SurfaceView mCameraView;
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private TextView mTextView;
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private CameraSource mCameraSource;
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private TextRecognizer textRecognizer;
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private CameraPermission cameraPermission;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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cameraPermission = new CameraPermission(this);
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mCameraView = findViewById(R.id.cameraView);
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mTextView = findViewById(R.id.text_view);
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startCamera();
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Button button = (Button) findViewById(R.id.button);
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button.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View
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public void onClick(View v) {
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Log.d("debug", "ボタンをクリックしました");
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Canvas canvas = mCameraView.getHolder().lockCanvas();
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//別途BitmapとCanvasを用意する
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Bitmap bmp = Bitmap.createBitmap(mCameraView.getWidth(), mCameraView.getHeight(), Bitmap.Config.ARGB_8888);
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Canvas tmpCanvas = new Canvas(bmp);
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//
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//TODO tmpCanvasに対して描画処理を行う
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Rect mScreenRect = new Rect(0, 0, mCameraView.getWidth(), mCameraView.getHeight());
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tmpCanvas.drawBitmap(bmp, null, mScreenRect, null);
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mCameraView.getHolder().unlockCanvasAndPost(canvas);
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}
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}); // btnRead
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}
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// ファイルを保存
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public void saveFile(String file, Bitmap bitmap) {
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// try-with-resources
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try (FileOutputStream fileOutputstream = openFileOutput(file,
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Context.MODE_PRIVATE)) {
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//bitmapをJpeg画像化
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bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fileOutputstream);
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fileOutputstream.flush();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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/**
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* Starts camera source after camera permission is granted
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*
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* @param requestCode
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* @param permissions
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* @param grantResults
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*/
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@Override
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public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
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if (requestCode == cameraPermission.getCameraPermissionID()) {
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if (cameraPermission.checkHasCameraPermission()) {
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Log.i("onRequestResult", "Permission has been granted");
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try {
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mCameraSource.start(mCameraView.getHolder());
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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/**
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* Gets TextBlock from TextRecognizer, set Text to TextView.
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*/
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private void setDataToTextView() {
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textRecognizer.setProcessor(new Detector.Processor<TextBlock>() {
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@Override
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public void receiveDetections(Detector.Detections<TextBlock> detections) {
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final SparseArray<TextBlock> items = detections.getDetectedItems();
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if (items.size() != 0) {
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mTextView.post(new Runnable() {
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@Override
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public void run() {
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//Gets strings from TextBlock and adds to StringBuilder
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final StringBuilder stringBuilder = new StringBuilder();
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for (int i = 0; i < items.size(); i++)
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stringBuilder.append(items.valueAt(i).getValue());
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mTextView.setText(stringBuilder.toString());
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}
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});
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}
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}
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@Override
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public void release() {
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}
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});
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}
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/**
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* Init camera source with needed properties,
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* then set camera view to surface view.
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* 必要なプロパティでカメラソースを初期化し、
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* カメラビューをサーフェスビューに設定します。
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*/
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private void startCamera() {
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textRecognizer = new TextRecognizer.Builder(getApplicationContext()).build();
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if (textRecognizer.isOperational()) {
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mCameraSource = new CameraSource.Builder(getApplicationContext(), textRecognizer)
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.setFacing(CameraSource.CAMERA_FACING_BACK)
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.setRequestedPreviewSize(1280, 1024)
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.setAutoFocusEnabled(true)
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.setRequestedFps(30.0f)
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.build();
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//If permission is granted cameraSource started and passed it to surfaceView
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mCameraView.getHolder().addCallback(new SurfaceHolder.Callback() {
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@Override
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public void surfaceCreated(SurfaceHolder holder) {
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if (cameraPermission.checkHasCameraPermission()) {
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try {
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mCameraSource.start(mCameraView.getHolder());
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} catch (IOException e) {
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e.printStackTrace();
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}
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} else {
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Log.i("surfaceCreated", "Permission request sent");
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cameraPermission.requestCameraPermission();
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}
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Log.e(TAG, "surfaceCreated()");
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}
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@Override
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public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
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Log.e(TAG, "surfaceChanged()");
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}
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@Override
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public void surfaceDestroyed(SurfaceHolder holder) {
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mCameraSource.stop();
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Log.e(TAG, "surfaceDestroyed()");
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}
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});
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setDataToTextView();
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Log.e(TAG, "setDataToTextView()");
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}
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}
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@Override
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public void onPause() {
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super.onPause();
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}
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}
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```
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```xml
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<FrameLayout
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<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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android:id="@+id/frameLayout"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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android:orientation="vertical"
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android:
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android:weightSum="10">
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android:fitsSystemWindows="false" >
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<SurfaceView
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android:id="@+id/cameraView"
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android:scaleType="fitCenter"
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android:layout_width="0dp"
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android:layout_height="0dp"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintLeft_toLeftOf="parent"
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app:layout_constraintRight_toRightOf="parent"
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app:layout_constraintTop_toTopOf="parent" />
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<
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<TextView
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android:id="@+id/
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android:id="@+id/text_view"
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android:layout_width="match_parent"
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android:layout_height="
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android:layout_height="50dp"
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android:gravity="bottom"
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android:textColor="@android:color/white"
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android:textSize="20sp"
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android:textStyle="bold"
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app:layout_constraintLeft_toLeftOf="parent"
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app:layout_constraintRight_toRightOf="parent"
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app:layout_constraintTop_toTopOf="parent" />
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<Button
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android:id="@+id/button"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintLeft_toLeftOf="parent"
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app:layout_constraintRight_toRightOf="parent" />
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</com.google.android.gms.samples.vision.ocrreader.ui.camera.CameraSourcePreview>
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<androidx.constraintlayout.widget.ConstraintLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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tools:context=".MainActivity">
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<Button
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android:id="@+id/button"
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android:text="Hello World!"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintLeft_toLeftOf="parent"
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app:layout_constraintRight_toRightOf="parent"
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/>
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</android.support.constraint.ConstraintLayout>
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</FrameLayout>
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```
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1
質問の加筆修正
title
CHANGED
|
File without changes
|
body
CHANGED
|
@@ -10,6 +10,7 @@
|
|
|
10
10
|
しかし今回、SurfaceViewを使っており、どうしてもBitmapが取得したい状況です。
|
|
11
11
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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？
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12
12
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あれば教えていただきたいです。
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13
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+
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。
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色々インターネットで検索してみましたが、良い解決策が見つかりませんでしたので、どなたかご教授いただければ嬉しいです。
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