1.从相册获取照片

private void openAlumb() {//mRxPermissions:三方权限库        mRxPermissions                .request(Manifest.permission.WRITE_EXTERNAL_STORAGE)                .subscribe(granted -> {                    if (granted) { // Always true pre-M                        Intent intentToPickPic = new Intent(Intent.ACTION_GET_CONTENT, null);                        // 如果限制上传到服务器的图片类型时可以直接写如："image/jpeg 、 image/png等的类型" 所有类型则写 "image/*"                        intentToPickPic.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");                        /*是否有能处理的外部activity*/                        if (intentToPickPic.resolveActivity(getPackageManager()) != null) {                            startActivityForResult(intentToPickPic, REQUEST_ALUBM);                        }                    } else {                    }                });    }

2.拍照

private void takePhoto() {        mRxPermissions.requestEach(Manifest.permission.WRITE_EXTERNAL_STORAGE).subscribe(permisssion -> {            if (permisssion.granted) {                if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY)) {
   //手机是否有探头                    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);                    /*是否有能处理的外部activity*/                    if (intent.resolveActivity(getPackageManager()) != null) {                        try {                            File photoFile = creatImageFile();                            Uri photoUri = FileProvider.getUriForFile(UserInfoActivity.this,                                    "com.ore.jalon.trace.fileprovider", photoFile);                            intent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);                        } catch (IOException e) {                            e.printStackTrace();                        }                        startActivityForResult(intent, REQUEST_TAKE_PHOTO);                    }                }            } else if (permisssion.shouldShowRequestPermissionRationale) {
   //拒绝了并且勾选了不再提示            } else {            }        });            }

private File creatImageFile() throws IOException {        /*判断是否有外存*/        if (Environment.getExternalStorageState().equals(MEDIA_UNMOUNTED)) {            return null;        }        String timeStamp = new SimpleDateFormat("yyyy_MMddmmss").format(new Date());        String imgFileName = "JPEG_" + timeStamp + "_";        /*保存到相册   */        File fileDirct = Environment.getExternalStoragePublicDirectory(DIRECTORY_DCIM);        File imgFile = File.createTempFile(imgFileName, ".jpg", fileDirct);        mCurrentPhotoPath = imgFile.getAbsolutePath();        return imgFile;    }

2.fileprovider: Android7.0开始 file://Uri 不给用，那么换个 Uri 为 content:// 来替代。

FileProvider使用

现在xml文件中申明

新建XML文件夹新建path.xml

最后在处理获取到的照片uri

protected void onActivityResult(int requestCode, int resultCode, Intent data) {        if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {//通过三方的缩放裁切一下图片            startPhotoZoom(Uri.fromFile(new File(mCurrentPhotoPath)));         }        if (requestCode == REQUEST_ALUBM && resultCode == RESULT_OK) {                  Uri uri = data.getData();            startPhotoZoom(uri);        }        if (requestCode == UCrop.REQUEST_CROP && resultCode == RESULT_OK) {//获取裁切后的图片            final Uri resultUri = UCrop.getOutput(data);         }    }  public void startPhotoZoom(Uri uri) {        LogUtil.d(this.toString(), "begin cut");        try {            File file = creatImageFile();            UCrop.Options options = new UCrop.Options();            options.setHideBottomControls(true);            UCrop.of(uri, Uri.fromFile(file))                    .withAspectRatio(1, 1)                    .withMaxResultSize(200, 200).withOptions(options)                    .start(this);        } catch (IOException e) {            e.printStackTrace();        }    }