我正在尝试让 Camera App 将输出存储到我的内部存储器中。我也了解第三方应用程序无法访问我的应用程序的内部存储,但我们可以通过FileProvider
. 我已按照此处的指南进行操作:
我AndroidManifest.xml
通过以下方式指定我的:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.stackoverflow.test.camerawithfileprovider" >
<application>
<activity
...
</activity>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.stackoverflow.test.camerawithfileprovider.fileprovider"
android:exported="false"
android:grantUriPermissions="true" >
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_provider_path" />
</provider>
</application>
</manifest>
我创建了一个名为的 xmlfile_provider_path.xml
文件/res/xml/
:
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<files-path name="image_capture" path="public/" />
</paths>
这就是我创建和调用相机意图的方式:
private static final int CAMERA_REQUEST_CODE = 5000;
private static final String CAMERA_FP_AUTHORITY = "com.stackoverflow.test.camerawithfileprovider.fileprovider";
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
Context context = MainActivity.this;
File imagePath = new File(context.getFilesDir(), "public");
if (!imagePath.exists()) imagePath.mkdirs();
File newFile = new File(imagePath, "tmp.jpg");
Uri imageUri = FileProvider.getUriForFile(context, CAMERA_FP_AUTHORITY, newFile);
//context.grantUriPermission("com.google.android.GoogleCamera", imageUri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
Log.d("YouQi", "Image URI Passing to Camera: " + imageUri.toString());
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, CAMERA_REQUEST_CODE);
当我运行应用程序时,我可以获得以下 Logcat 结果:
11-11 20:07:39.581 18303-18303/com.stackoverflow.test.camerawithfileprovider D/YouQi: Image URI Passing to Camera: content://com.stackoverflow.test.camerawithfileprovider.fileprovider/image_capture/tmp.jpg
就在相机关闭的那一刻,我遇到了以下异常:
com.google.android.GoogleCamera E/AndroidRuntime: FATAL EXCEPTION: main
com.google.android.GoogleCamera E/AndroidRuntime: Process: com.google.android.GoogleCamera, PID: 19420
com.google.android.GoogleCamera E/AndroidRuntime: java.lang.SecurityException: Permission Denial: opening provider android.support.v4.content.FileProvider from ProcessRecord{42e44f70 19420:com.google.android.GoogleCamera/u0a83} (pid=19420, uid=10083) that is not exported from uid 10312
com.google.android.GoogleCamera E/AndroidRuntime: at android.os.Parcel.readException(Parcel.java:1465)
com.google.android.GoogleCamera E/AndroidRuntime: at android.os.Parcel.readException(Parcel.java:1419)
com.google.android.GoogleCamera E/AndroidRuntime: at android.app.ActivityManagerProxy.getContentProvider(ActivityManagerNative.java:2882)
com.google.android.GoogleCamera E/AndroidRuntime: at android.app.ActivityThread.acquireProvider(ActivityThread.java:4544)
com.google.android.GoogleCamera E/AndroidRuntime: at android.app.ContextImpl$ApplicationContentResolver.acquireUnstableProvider(ContextImpl.java:2274)
com.google.android.GoogleCamera E/AndroidRuntime: at android.content.ContentResolver.acquireUnstableProvider(ContentResolver.java:1425)
com.google.android.GoogleCamera E/AndroidRuntime: at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:906)
com.google.android.GoogleCamera E/AndroidRuntime: at android.content.ContentResolver.openOutputStream(ContentResolver.java:669)
com.google.android.GoogleCamera E/AndroidRuntime: at android.content.ContentResolver.openOutputStream(ContentResolver.java:645)
com.google.android.GoogleCamera E/AndroidRuntime: at com.android.camera.PhotoModule.onCaptureDone(PhotoModule.java:1281)
com.google.android.GoogleCamera E/AndroidRuntime: at com.android.camera.PhotoModule$8.onClick(PhotoModule.java:593)
com.google.android.GoogleCamera E/AndroidRuntime: at android.view.View.performClick(View.java:4445)
com.google.android.GoogleCamera E/AndroidRuntime: at android.view.View$PerformClick.run(View.java:18446)
com.google.android.GoogleCamera E/AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:733)
com.google.android.GoogleCamera E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:95)
com.google.android.GoogleCamera E/AndroidRuntime: at android.os.Looper.loop(Looper.java:136)
com.google.android.GoogleCamera E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5146)
com.google.android.GoogleCamera E/AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method)
com.google.android.GoogleCamera E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:515)
com.google.android.GoogleCamera E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:732)
com.google.android.GoogleCamera E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)
com.google.android.GoogleCamera E/AndroidRuntime: at dalvik.system.NativeStart.main(Native Method)
任何人都可以帮助解释为什么会出现问题吗?我已经为我的问题创建了一个示例项目:http ://www.axzae.com/downloads/CameraWithFileProvider.zip
无论如何,如果我明确指定,该应用程序将起作用:
context.grantUriPermission(
"com.google.android.GoogleCamera",
imageUri,
Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION
);
但这仅适用于 nexus/cyanogen 设备。三星相机应用程序可能使用不同的包名称。