Question

到目前为止，我使用此tutorial来创建相机活动及其工作正常，但是我需要显示已捕获/结果的图像，并带有重复进行捕获，确认和保存图像或取消的选项。

我搜索了很多Google，但找不到或不知道该怎么做。

Answer 1

您需要使用此SurfaceView 这是一个教程。

https://examples.javacodegeeks.com/android/core/ui/surfaceview/android-surfaceview-example/

Answer 2

在布局相机预览中。添加“图像”视图小部件，然后将其设置为“消失”。

在您的方法ImageReader.OnImageAvailableListener中，byte []结果实现方法将该字节保存为JPEG然后显示。这是我的功能：

/ **

一种将图像保存到存储的方法 * / 私人void saveImageFile（final byte [] bytes）引发IOException { OutputStream outputStream = null;

尝试{ outputStream =新的FileOutputStream（file）; outputStream.write（bytes）;

//to tell system update data
sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(file)));

//check if dir after create or not
if (!dir.exists())
    dir.mkdir();

//compress file is file to upload database, so i remove this after get byte
compressFIle = new File(dir,UUID.randomUUID()+"compresss.jpg");
compressFIle =  new Compressor(this)
        .compressToFile(file);
if (latitude != null) {

    //change UI

    runOnUiThread(new Runnable() {

        @Override
        public void run() {

            // Stuff that updates the UI

            imageview.setImage(ImageSource.uri(Uri.fromFile(compressFIle)));
            //imageview.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_CENTER_CROP);
            //imageview.setLayoutParams(new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT));
            imageview.setVisibility(View.VISIBLE);

            //replace UI
            btn_shot.setText("SAVE");
            btn_galery.setText("Re-shoot");

            try {
                //call method for savemeta data
                saveMetaData(file);
                saveMetaData(compressFIle);
            } catch (IOException e) {
                e.printStackTrace();
            }

            //action for call method save image to storage
            btn_shot.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    //saveImageFile
                    try {
                        bytesfile = FileUtils.readFileToByteArray(compressFIle);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }

                    //call method for save data into sqlite
                    saveIntoDatabasesqlite(latitude,longitude,bytesfile,1);//work id default
                    showSnackBar("Saved ", Snackbar.LENGTH_SHORT);
                    new Handler().postDelayed(new Runnable() {
                        @Override
                        public void run() {

                            //delete not compress image
                            deleteImage(file.getPath());

                            Intent intent = new Intent();
                            intent.putExtra("photoUri",""+Uri.fromFile(compressFIle));
                            setResult(RESULT_OK,intent);
                            finish();
                        }
                    }, 1000);

                }
            });
            //action galert Reshot
            btn_galery.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    imageview.setVisibility(View.GONE);
                    unlockFocus();
                    /*deleteImage(file.getPath());*/
                    File newfile = new File(dir,UUID.randomUUID()+".jpg");
                    OutputStream outputStream1 = null;
                    try {

                        byte[] newbyte = FileUtils.readFileToByteArray(file);
                        outputStream1 = new FileOutputStream(newfile);
                        outputStream1.write(newbyte);
                        //to tell system update data
                        sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(newfile)));
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }finally {
                        finger_spacing = 0;


                        Log.e("finger spacing reshot",""+finger_spacing);
                        mPreviewRequestBuilder.set(CaptureRequest.SCALER_CROP_REGION, null);
                        zoom_level = 1;

                        try {
                            mCaptureSession
                                    .setRepeatingRequest(mPreviewRequestBuilder.build(), mCaptureCallback, null);






                        } catch (CameraAccessException e) {
                            e.printStackTrace();
                        } catch (NullPointerException ex) {
                            ex.printStackTrace();
                        }
                        if (outputStream1 != null) {
                            try {
                                outputStream1.close();
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }


                    }





                    //reshot
                    btn_shot.setText("SHOOT");
                    btn_shot.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            Log.e("fab Click",""+"FAB CLICK reshot");
                            //take picture
                            lockFocus();
                        }
                    });

                    // action galery
                    btn_galery.setText("Gallery");
                    btn_galery.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            /*deleteImage(file.getPath());*/
                            file.delete();
                            final Intent scanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                            final Uri contentUri = Uri.fromFile(file);
                            scanIntent.setData(contentUri);
                            sendBroadcast(scanIntent);
                            Intent intent = new Intent(ShotActivity_camera2API.this,GaleryActivity.class);
                            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
                            startActivityForResult(intent,GALERY_REQUEST_CODE);
                            // finish();
                        }
                    });
                }
            });
        }
    });
}

}最后{

if (outputStream != null)
    outputStream.close();

} }

如何使用Android camera2确认捕获的结果？

2 个答案: