在Android 7.0以上,在相机拍照和图片裁剪上,可能会碰到以下一些错误:
Process: com.yuyh.imgsel, PID:22995// 错误1android.os.FileUriExposedException: file:///storage/emulated/0/Android/data/com.yuyh.imgsel/cache/1486438962645.jpg exposed beyond app through ClipData.Item.getUri()// 错误2android.os.FileUriExposedException: file:///storage/emulated/0/DCIM/RxGalleryFinal/IMG_20161018180127.jpg exposed beyond app through Intent.getData()
主要是由于在Android 7.0以后,用了Content Uri 替换了原本的File Uri,故在targetSdkVersion=24的时候,部分 “`Uri.fromFile()“` 方法就不适用了。 **File Uri 与 Content Uri 的区别** - File Uri 对应的是文件本身的存储路径 - Content Uri 对应的是文件在Content Provider的路径 所以在android 7.0 以上,我们就需要将File Uri转换为 Content Uri。具体转换方法如下:
```
/** * 转换 content:// uri * *@paramimageFile *@return*/publicUri getImageContentUri(File imageFile) { String filePath = imageFile.getAbsolutePath(); Cursor cursor = getContentResolver().query( MediaStore.Images.Media.EXTERNAL_CONTENT_URI,newString[] { MediaStore.Images.Media._ID }, MediaStore.Images.Media.DATA +"=? ",newString[] { filePath },null);if(cursor !=null&& cursor.moveToFirst()) { int id = cursor.getInt(cursor .getColumnIndex(MediaStore.MediaColumns._ID)); Uri baseUri = Uri.parse("content://media/external/images/media");returnUri.withAppendedPath(baseUri,""+ id); }else{if(imageFile.exists()) { ContentValues values =newContentValues(); values.put(MediaStore.Images.Media.DATA, filePath);returngetContentResolver().insert( MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values); }else{returnnull; } }}
```
那么,我们在裁剪的时候,应该如下调用:
privatevoid crop(String imagePath) { File file =newFile("xxx.jpg"); cropImagePath = file.getAbsolutePath(); Intent intent =newIntent("com.android.camera.action.CROP"); intent.setDataAndType(getImageContentUri(newFile(imagePath)),"image/*"); intent.putExtra("crop","true"); intent.putExtra("aspectX", config.aspectX); intent.putExtra("aspectY", config.aspectY); intent.putExtra("outputX", config.outputX); intent.putExtra("outputY", config.outputY); intent.putExtra("scale",true); intent.putExtra("return-data",false); intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file)); intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString()); intent.putExtra("noFaceDetection",true); startActivityForResult(intent, IMAGE_CROP_CODE);}
这样就解决了裁剪的问题,但是!!拍照的时候就会出现以下错误:
Intent cameraIntent =newIntent(MediaStore.ACTION_IMAGE_CAPTURE);if(cameraIntent.resolveActivity(getActivity().getPackageManager()) !=null) { tempFile =newFile(FileUtils.createRootPath(getActivity()) +"/"+ System.currentTimeMillis() +".jpg"); LogUtils.e(tempFile.getAbsolutePath()); FileUtils.createFile(tempFile); cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(tempFile)); startActivityForResult(cameraIntent, REQUEST_CAMERA);}
android.os.FileUriExposedException: file:///storage/emulated/0/Android/data/com.yuyh.imgsel/cache/1486438962645.jpg exposed beyond app through ClipData.Item.getUri()
这是因为拍照存储的文件,也需要以Content Uri的形式,故采用以下办法解决:
Step.1
修改AndroidManifest.xml
Step.2
在res/xml/下新建provider_paths.xml文件
Step.3
修改拍照时的参数
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, FileProvider.getUriForFile(getActivity(),BuildConfig.APPLICATION_ID +".provider", tempFile));//Uri.fromFile(tempFile)
搞定!