启动相机导致崩溃安卓

Question

我关注了这个简单的应用程序AndroidScannerDemo，它有两个主按钮打开相机和打开图库。相机在我的手机API 19上工作正常，但是当我尝试在其他设备或模拟器上启动相机时，应用程序崩溃。

据我所知，这可能是由于许可

编辑：显然不久前也在这里问过这个问题，但问题仍然存在

错误更新：来自createImageFile方法的根本问题

我试过改变//cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, tempFileUri);至

cameraIntent.putExtra(ScanConstants.OPEN_INTENT_PREFERENCE, preference);

我可以启动相机，但拍照后立即崩溃

更新2：我正在尝试按照本文提供答案，这是我正在使用的唯一问题

片段那么我该如何更改此行tempFileUri = FileProvider.getUriForFile(getActivity().getApplicationContext(), "com.scanlibrary.provider", // As defined in Manifest file);

自tempFileUri = FileProvider.getUriForFile(PickImageFragment.this, getString(R.string.file_provider_authority), file);在碎片里面！

错误的第一个参数 PickImageFragment

编辑：更改了PickImageFragment中的openCamera((方法

我错过了什么？

堆栈跟踪

2019-11-29 23:45:05.750 27993-27993/com.nabeeltech.capturedoc E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.nabeeltech.capturedoc, PID: 27993
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nabeeltech.capturedoc/com.scanlibrary.ScanActivity}: java.lang.SecurityException: UID 10091 does not have permission to content://com.scanlibrary.provider/external_files/scanSample/IMG_20191129_224505.jpg [user 0]
Caused by: java.lang.SecurityException: UID 10091 does not have permission to content://com.scanlibrary.provider/external_files/scanSample/IMG_20191129_224505.jpg [user 0]
at com.scanlibrary.PickImageFragment.openCamera(PickImageFragment.java:131)
at com.scanlibrary.PickImageFragment.handleIntentPreference(PickImageFragment.java:79)
at com.scanlibrary.PickImageFragment.init(PickImageFragment.java:60)
at com.scanlibrary.PickImageFragment.onCreateView(PickImageFragment.java:50)

PickImageFragment

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.pick_image_fragment, null);
init();
return view;
}
private void init() {
cameraButton = (ImageButton) view.findViewById(R.id.cameraButton);
cameraButton.setOnClickListener(new CameraButtonClickListener());
galleryButton = (ImageButton)
view.findViewById(R.id.selectButton);
galleryButton.setOnClickListener(new GalleryClickListener());
if (isIntentPreferenceSet()) {
handleIntentPreference();
} else {
getActivity().finish();
}
}
private void handleIntentPreference() {
int preference = getIntentPreference();
if (preference == ScanConstants.OPEN_CAMERA) {
openCamera();
} else if (preference == ScanConstants.OPEN_MEDIA) {
openMediaContent();
}
}
public void openCamera() {
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
Uri tempFileUri = null;
File file = createImageFile();
boolean isDirectoryCreated = file.getParentFile().mkdirs();
Log.d("", "openCamera: isDirectoryCreated: " + isDirectoryCreated);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
tempFileUri = FileProvider.getUriForFile(getActivity().getApplicationContext(),
"com.scanlibrary.provider", // As defined in Manifest
file);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, tempFileUri);
} else {
tempFileUri = Uri.fromFile(file);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, tempFileUri);
}
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.LOLLIPOP) {
cameraIntent.setClipData(ClipData.newRawUri("", tempFileUri));
cameraIntent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
}
startActivityForResult(cameraIntent, ScanConstants.START_CAMERA_REQUEST_CODE);
private File createImageFile() {
clearTempImages();
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new
Date());
File file = new File(ScanConstants.IMAGE_PATH, "IMG_" + timeStamp +
".jpg");
fileUri = Uri.fromFile(file);
return file;
}
private void clearTempImages() {
try {
File tempFolder = new File(ScanConstants.IMAGE_PATH);
for (File f : tempFolder.listFiles())
f.delete();
} catch (Exception e) {
e.printStackTrace();
}
}

扫描常量

public class ScanConstants {
public final static int PICKFILE_REQUEST_CODE = 1;
public final static int START_CAMERA_REQUEST_CODE = 2;
public final static String OPEN_INTENT_PREFERENCE = "selectContent";
public final static String IMAGE_BASE_PATH_EXTRA = "ImageBasePath";
public final static int OPEN_CAMERA = 4;
public final static int OPEN_MEDIA = 5;
public final static String SCANNED_RESULT = "scannedResult";
public final static String IMAGE_PATH = Environment
.getExternalStorageDirectory().getPath() + "/scanSample";
public final static String SELECTED_BITMAP = "selectedBitmap";
}

Answer 1

您已经编写了代码Fileprovider.getUriforFile这很好，但是您声明了所需的权限。

解决此问题的唯一方法是向可能需要它的所有包授予权限，如下所示：

List<ResolveInfo> resInfoList = context.getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
for (ResolveInfo resolveInfo : resInfoList) {
String packageName = resolveInfo.activityInfo.packageName;
context.grantUriPermission(packageName, uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
}

如果以上不能解决问题，我建议参考Lorenzo Quiroli的这篇文章，该文章解决了旧Android版本的此问题。

他发现您需要手动设置意图的ClipData并为其设置权限，如下所示：

if ( Build.VERSION.SDK_INT <= Build.VERSION_CODES.LOLLIPOP ) {
takePictureIntent.setClipData( ClipData.newRawUri( "", photoURI ) );
takePictureIntent.addFlags( Intent.FLAG_GRANT_WRITE_URI_PERMISSION|Intent.FLAG_GRANT_READ_URI_PERMISSION );
}