[英]launch Camera causing crash Android
我遵循了這個簡單的應用程序AndroidScannerDemo ,它有兩個主要按鈕打開相機和打開畫廊。 相機在我的手機 API 19 上運行良好,但是當我嘗試在其他設備或模擬器上啟動相機時,應用程序崩潰。
據我所知,這可能是由於許可
編輯:顯然這也是前一段時間在這里問過的,但問題仍然存在
錯誤更新:來自createImageFile
方法的根本問題
我嘗試改變//cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, tempFileUri);
到
cameraIntent.putExtra(ScanConstants.OPEN_INTENT_PREFERENCE, preference);
我可以啟動相機,但拍照后立即崩潰
更新 2 :我正在嘗試按照本文提供的答案在我使用片段的唯一問題下方
那么如何更改這一行tempFileUri = FileProvider.getUriForFile(getActivity().getApplicationContext(), "com.scanlibrary.provider", // As defined in Manifest file);
到tempFileUri = FileProvider.getUriForFile(PickImageFragment.this, getString(R.string.file_provider_authority), file);
在一個片段里面!
錯誤的第一個參數 PickImageFragment
編輯:更改了 PickImageFragment 內的 openCamera() 方法
我錯過了什么?
堆棧跟蹤
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)
選擇圖像片段
@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();
}
}
掃描常數
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";
}
您已經編寫了很好的代碼Fileprovider.getUriforFile
,但是您是否聲明了所需的權限。
解決這個問題的唯一方法是向所有可能需要它的包授予權限,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);
}
如果以上沒有解決問題,我建議參考 Lorenzo Quiroli 的這篇文章,該文章為舊版 Android 解決了這個問題。
他發現需要手動設置Intent的ClipData
並ClipData
設置權限,像這樣:
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 );
}
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