android 6.0以上版本拍照功能实现

来源：互联网发布：mac app store更新编辑：程序博客网时间：2024/04/29 09:26

android 6.0及以上版本实现拍照功能的方法

步骤一：创建一个给予权限的Utils，Demo1如下：

private static String[] PERMISSIONS_CAMERA_AND_STORAGE = {        Manifest.permission.READ_EXTERNAL_STORAGE,        Manifest.permission.WRITE_EXTERNAL_STORAGE,        Manifest.permission.CAMERA};public static boolean isCameraPermission(Activity context, int requestCode){    if (Build.VERSION.SDK_INT >= 23) {        int storagePermission = ActivityCompat.checkSelfPermission(context,                Manifest.permission.WRITE_EXTERNAL_STORAGE);        int cameraPermission = ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA);        if (storagePermission != PackageManager.PERMISSION_GRANTED || cameraPermission!= PackageManager.PERMISSION_GRANTED ) {            ActivityCompat.requestPermissions(context, PERMISSIONS_CAMERA_AND_STORAGE,                    requestCode);            return false;        }    }    return true;}/** * 获取bitmap * * @param filePath * @return */public static Bitmap getBitmapByPath(String filePath, int w, int h) {    FileInputStream fis = null;    Bitmap bitmap = null;    try {        File file = new File(filePath);        if (file.exists()) {            fis = new FileInputStream(file);            BitmapFactory.Options options = new BitmapFactory.Options();            options.inJustDecodeBounds = true;            BitmapFactory.decodeFile(filePath, options);            int originalWidth = options.outWidth;//图片原始宽度            int originalHeight = options.outHeight;//图片原始高度            if ((originalWidth == -1) || (originalHeight == -1))                return null;            //缩放比。由于是固定比例缩放，只用高或者宽其中一个数据进行计算即可            int be = 1;//be=1表示不缩放            if (originalWidth > originalHeight && originalWidth > w) {//如果宽度大的话根据宽度固定大小缩放                be = (int) (originalWidth / w);            } else if (originalWidth < originalHeight && originalHeight > h) {//如果高度高的话根据宽度固定大小缩放                be = (int) (originalHeight / h);            }            if (be <= 0)                be = 1;            options.inJustDecodeBounds = false;            options.inSampleSize = be;//设置缩放比例            options.inPreferredConfig = Bitmap.Config.RGB_565;            bitmap = BitmapFactory.decodeFile(filePath, options);        }    } catch (IOException e) {        e.printStackTrace();    } catch (OutOfMemoryError e) {        e.printStackTrace();    } finally {        try {            fis.close();        } catch (Exception e) {        }    }    //return getBitmapByPath(filePath, bitmapOptions);    return compressImage(bitmap);}/** * 质量压缩方法 * * @param image * @return */public static Bitmap compressImage(Bitmap image) {    ByteArrayOutputStream baos = new ByteArrayOutputStream();    image.compress(Bitmap.CompressFormat.JPEG, 100, baos);//质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中    int options = 90;    int bytes = baos.toByteArray().length;    while ((bytes / 1024 > 100) && (options >= 20)) {  //循环判断如果压缩后图片是否大于10kb,大于继续压缩        baos.reset();//重置baos即清空baos        options -= 10;//每次都减少10        //第一个参数 ：图片格式 ，第二个参数： 图片质量，100为最高，0为最差  ，第三个参数：保存压缩后的数据的流        image.compress(Bitmap.CompressFormat.JPEG, options, baos);//这里压缩options%，把压缩后的数据存放到baos中        bytes = baos.toByteArray().length;    }    image.recycle();    ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());//把压缩后的数据baos存放到ByteArrayInputStream中    Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);//把ByteArrayInputStream数据生成图片    return bitmap;}

步骤二：点击拍照方法中调区这个权限Demo1，形如；

if (Demo1.isCameraPermission(ReceiptConfirmActivity.this, 0x007))                    getCamera();

步骤三：请求权限回调

@Override    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {        switch (requestCode) {            case 0x007:                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {                    byCamera();                } else {                    Toast.makeText(this, "拍照权限被拒绝", Toast.LENGTH_SHORT).show();                }                break;            default:                super.onRequestPermissionsResult(requestCode, permissions, grantResults);        }    }

步骤四：实现拍照方法

public void getCamera() {        String savePath = "";        String storageState = Environment.getExternalStorageState();        if (storageState.equals(Environment.MEDIA_MOUNTED)) {            savePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/camera/";            File savedir = new File(savePath);            if (!savedir.exists()) {                savedir.mkdirs();            }        }        // 没有挂载SD卡，无法保存文件        if (savePath == null || "".equals(savePath)) {            System.out.println("无法保存照片，请检查SD卡是否挂载");            return;        }        String timeStamp = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());        //照片命名        String fileName = timeStamp + ".jpg";        File out = new File(savePath, fileName);        Uri uri = Uri.fromFile(out);        //该照片的绝对路径        imagePath = savePath + fileName;        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);        startActivityForResult(intent, 0x008);    }

步骤五：显示照片

@Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (requestCode == 8) {            if(imagePath!=null && resultCode == RESULT_OK){                ivGetGoodsPhoto.setImageBitmap(PermissionUtils.getBitmapByPath(imagePath,480,800));            }        }    }

Ok，功能实现！

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