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Android 7.0 之拍照与图片裁剪适配

2019-11-09 18:03:23
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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 * * @param imageFile * @return */public Uri getImageContentUri(File imageFile) { String filePath = imageFile.getAbsolutePath(); Cursor cursor = getContentResolver().query( MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new String[] { MediaStore.Images.Media._ID }, MediaStore.Images.Media.DATA + "=? ", new String[] { 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"); return Uri.withAppendedPath(baseUri, "" + id); } else { if (imageFile.exists()) { ContentValues values = new ContentValues(); values.put(MediaStore.Images.Media.DATA, filePath); return getContentResolver().insert( MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values); } else { return null; } }}那么,我们在裁剪的时候,应该如下调用:private void crop(String imagePath) { File file = new File("xxx.jpg"); cropImagePath = file.getAbsolutePath(); Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(getImageContentUri(new File(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 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);if (cameraIntent.resolveActivity(getActivity().getPackageManager()) != null) { tempFile = new File(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

<application ...> <provider android:name="android.support.v4.content.FileProvider" android:authorities="{替换为你的包名}.provider" android:exported="false" android:grantUriPermissions="true"> <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/provider_paths"/> </provider></application>

Step.2

在res/xml/下新建provider_paths.xml文件

<?xml version="1.0" encoding="utf-8"?><paths xmlns:android="http://schemas.android.com/apk/res/android"> <external-path name="external_files" path="."/></paths>

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!
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