我正在试图让相机应用程序将输出存储到我的内部存储器。我也明白,第三方应用程序无法访问我的应用程序但是的内部存储,我们可以通过FileProvider
公开内部目录。我按照这里的指南:FileProvider不能使用相机
- Camera Intent not saving photo
- https://developer.android.com/reference/android/support/v4/content/FileProvider.html
我以下列方式指定我AndroidManifest.xml
:
<?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/res/xml/
创建了一个名为file_provider_path.xml
一个XML文件:
<?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>
这是我如何创建和调用摄像头意图:
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,我可以得到下面的logcat的结果:
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
就在那一刻,当相机关闭,我下面例外:
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问题发生?我创建了我的问题的样本项目:http://www.axzae.com/downloads/CameraWithFileProvider.zip
总之,应用程序将工作,如果我明确指定:
context.grantUriPermission(
"com.google.android.GoogleCamera",
imageUri,
Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION
);
但这只会于Nexus /氰设备一起工作。三星相机应用程序可能会使用不同的包名称。
非常令人满意的破解:) –
'addFlags()'适用于Android 5.0+。在较旧的设备上,您的方法是必需的。有关示例,请参阅https://github.com/commonsguy/cw-omnibus/tree/master/Camera/FileProvider。 – CommonsWare
我在这里有一个疑问。我很抱歉我对Android的知识很少,但我很困惑。在启动相机之前,我将目录设置为“Environment.getExternalStoragePublicDirectory( Environment.DIRECTORY_PICTURES”)。我还需要使用FileProvider还是仅用于存储在私人应用程序区域中的图像? – AndroidGuy