Android 7.0 之拍照與圖片裁剪適配
阿新 • • 發佈:2018-10-31
在Android 7.0以上,在相機拍照和圖片裁剪上,可能會碰到以下一些錯誤:
Process: com.yuyh.imgsel, PID: 22995
// 錯誤1
android.os.FileUriExposedException: file:///storage/emulated/0/Android/data/com.yuyh.imgsel/cache/1486438962645.jpg exposed beyond app through ClipData.Item.getUri()
// 錯誤2
android.os.FileUriExposedException: file:///storage/emulated/0 /DCIM/RxGalleryFinal/IMG_20161018180127.jpg exposed beyond app through Intent.getData()
主要是由於在Android 7.0以後,用了Content Uri 替換了原本的File Uri,故在targetSdkVersion=24的時候,部分 “`Uri.fromFile()“` 方法就不適用了。 **File Uri 與 Content Uri 的區別** - File Uri 對應的是檔案本身的儲存路徑 - Content Uri 對應的是檔案在Content Provider的路徑 所以在android 7.0 以上,我們就需要將File Uri轉換為 Content Uri。具體轉換方法如下:
/**
* 轉換 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;
}
}
}
那麼,我們在裁剪的時候,應該如下呼叫:
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);
}
這樣就解決了裁剪的問題,但是!!拍照的時候就會出現以下錯誤:
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()
這是因為拍照儲存的檔案,也需要以Content Uri的形式,故採用以下辦法解決:
Step.1
修改AndroidManifest.xml
<application
...>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="{替換為你的包名}.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檔案
<?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
修改拍照時的引數
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, FileProvider.getUriForFile(getActivity(),BuildConfig.APPLICATION_ID + ".provider", tempFile)); //Uri.fromFile(tempFile)
搞定!