android 拍照并压缩照片

来源：互联网发布：解压软件怎么用编辑：程序博客网时间：2024/05/01 11:52

获取存储图片文件对象

public File getPhotoFile(Crime crime) {        //获取存放图片文件的路径        File extrenalFilesDir = mContext.getExternalFilesDir(Environment.DIRECTORY_PICTURES);        if(extrenalFilesDir == null) {            return null;        }        //如果存在路径，那么获取File对象，为crime.getPhotoFilename()对象        return new File(extrenalFilesDir, crime.getPhotoFilename());    }

启动相机

<span style="white-space:pre"></span>mPhotoFile = getPhotoFile(crime);<span style="white-space:pre"></span>//打开相机的Intent        final Intent captureImage = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        //当前存储的路径不为空并且存在能够接收当前intent的应用        boolean canTakePhoto = mPhotoFile != null && captureImage.resolveActivity(packageManager) != null;        if(canTakePhoto) {            //获取文件的Uri            Uri uri = Uri.fromFile(mPhotoFile);            //指定图片的储存位置            captureImage.putExtra(MediaStore.EXTRA_OUTPUT, uri);        }        mPhotoButton.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                startActivityForResult(captureImage, REQUEST_PHOTO);            }        });

压缩图片同时将图片显示在设备上

mPhotoView = (ImageView) view.findViewById(R.id.crime_photo);if(mPhotoView == null || !mPhotoFile.exists()) {            mPhotoView.setImageDrawable(null);        } else {            Bitmap bitmap = PictureUtils.getScaledBitmap(mPhotoFile.getPath(), getActivity());            mPhotoView.setImageBitmap(bitmap);        }

PictureUtiles.getScaledBitmap()方法

    //获取屏幕尺寸    public static Bitmap getScaledBitmap(String path, Activity activity) {        Point size = new Point();        activity.getWindowManager().getDefaultDisplay().getSize(size);        return getScaledBitmap(path, size.x, size.y);    }    //destWidth destHeight对比的高宽    public static Bitmap getScaledBitmap(String path, int destWidth, int destHeight) {        //创建图片处理条件的对象        BitmapFactory.Options options = new BitmapFactory.Options();        //设置该属性为true，不加载图片到内存，只返回图片的宽高到options中。        options.inJustDecodeBounds = true;        //加载获取图片的宽高        BitmapFactory.decodeFile(path, options);        //当前图片高宽        float srcWidth = options.outWidth;        float srcHeight = options.outHeight;        int inSampleSize = 1;        if(srcHeight > destHeight || srcWidth > destWidth) {            if(srcWidth > srcHeight) {                inSampleSize = Math.round(srcHeight / destHeight);            } else {                inSampleSize = Math.round(srcWidth / destWidth);            }        }        //缩放比例        options = new BitmapFactory.Options();        options.inSampleSize = inSampleSize;        return BitmapFactory.decodeFile(path, options);    }

0 0