FileProvider不使用相机

时间:2015-11-11 12:32:58

标签: android android-camera android-fileprovider

我试图让Camera App将输出存储到我的内部存储中。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我们可以通过FileProvider公开内部目录来实现。我在这里遵循了指南:

我以下列方式指定我的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>

我在file_provider_path.xml中创建了一个名为/res/xml/的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>

这就是我创建和调用Camera Intent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,我可以得到以下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

在相机关闭的那一刻,我点击下面的例外:

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)

任何人都可以帮忙解释问题发生的原因吗?我已经创建了一个问题的示例项目:http://www.axzae.com/downloads/CameraWithFileProvider.zip

无论如何,如果我明确指定:

,该应用程序将有效
context.grantUriPermission(
    "com.google.android.GoogleCamera",
    imageUri,
    Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION
);

但这只适用于nexus / cyanogen设备。三星相机应用程序可能使用不同的包名称。

2 个答案:

答案 0 :(得分:104)

  1. 请不要按照exported="true"的指示放置pskink,您的应用会在加载时崩溃。 FileProvider不适用于此状态。

  2. intent.addFlags尝试了CommonsWare解决方案。不工作。可能仅适用于ACTION_SEND种意图。

  3. 我找到了答案in this post。显然,手动授权方式是唯一的解决方案。但是我们总是可以通过候选包列表和grantPermission循环到所有这些包。

    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);
    }
    

答案 1 :(得分:0)

我有一个类似的问题,但后来我发现我的代码中有一个拼写错误。 输入错误在AndroidManifest.xml中,正好位于“权限”行的标记中。

对我来说,

android:authorities="com.stackoverflow.test.camerawithfileprovider.fileprovider"

不起作用(当我调用相机实例时,应用程序崩溃)但如果我删除“文件”并将该字符串替换为以下内容:

android:authorities="com.stackoverflow.test.camerawithfileprovider.provider"

我的应用程序运行流畅(应用程序拍摄照片,存储它,并在客户端应用程序中返回活动预览)。

您的应用也有同样的问题吗?