Android 安全异常 : Permission Denial

Question

我的 Android 应用程序存在权限问题:这里是日志。

06-25 17:25:35.862  12039-13799/? E/DatabaseUtils﹕ Writing exception to parcel
java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/images/media from pid=1580, uid=10108 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission()
        at android.content.ContentProvider.enforceReadPermissionInner(ContentProvider.java:605)
        at android.content.ContentProvider$Transport.enforceReadPermission(ContentProvider.java:480)
        at android.content.ContentProvider$Transport.query(ContentProvider.java:211)
        at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:112)
        at android.os.Binder.execTransact(Binder.java:453)



06-25 17:25:35.870    1580-2997/? E/iu.UploadsManager﹕ Insufficient permissions to access media store
java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/images/media from pid=1580, uid=10108 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission()
        at android.os.Parcel.readException(Parcel.java:1599)
        at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:183)
        at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)
        at android.content.ContentProviderProxy.query(ContentProviderNative.java:421)
        at android.content.ContentResolver.query(ContentResolver.java:498)
        at android.content.ContentResolver.query(ContentResolver.java:441)
        at ifh.i(PG:5904)
        at ifh.h(PG:619)
        at ifh.<init>(PG:187)
        at iel.c(PG:4045)
        at gen_binder.root.RootModule$Generated.a(PG:1131)
        at nmw.e(PG:415)
        at nmw.b(PG:242)
        at nmw.a(PG:207)
        at nmw.a(PG:493)
        at ier.a(PG:2195)
        at ier.onPerformSync(PG:125)
        at android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:272)


06-25 17:24:37.031    1580-1611/? E/GooglePlusContactsSync﹕ Failed to clear out contacts
java.lang.SecurityException: Permission Denial: opening provider com.android.providers.contacts.ContactsProvider2ForLG from ProcessRecord{9557af9 1580:com.google.android.apps.plus/u0a108} (pid=1580, uid=10108) requires android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS
        at android.os.Parcel.readException(Parcel.java:1599)
        at android.os.Parcel.readException(Parcel.java:1552)
        at android.app.ActivityManagerProxy.getContentProvider(ActivityManagerNative.java:3652)
        at android.app.ActivityThread.acquireProvider(ActivityThread.java:4866)
        at android.app.ContextImpl$ApplicationContentResolver.acquireUnstableProvider(ContextImpl.java:2020)
        at android.content.ContentResolver.acquireUnstableProvider(ContentResolver.java:1488)
        at android.content.ContentResolver.query(ContentResolver.java:482)
        at android.content.ContentResolver.query(ContentResolver.java:441)
        at dpm.a(PG:397)
        at dpm.b(PG:1345)
        at dpn.run(PG:282)
        at java.lang.Thread.run(Thread.java:818)

我知道这是一个权限问题，我可以通过授予权限来解决，如下所示:

// Here, thisActivity is the current activity
if (ContextCompat.checkSelfPermission(thisActivity,
                Manifest.permission.READ_CONTACTS)
        != PackageManager.PERMISSION_GRANTED) {

    // Should we show an explanation?
    if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
            Manifest.permission.READ_CONTACTS)) {

        // Show an expanation to the user *asynchronously* -- don't block
        // this thread waiting for the user's response! After the user
        // sees the explanation, try again to request the permission.

    } else {

        // No explanation needed, we can request the permission.

        ActivityCompat.requestPermissions(thisActivity,
                new String[]{Manifest.permission.READ_CONTACTS},
                MY_PERMISSIONS_REQUEST_READ_CONTACTS);

        // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
        // app-defined int constant. The callback method gets the
        // result of the request.
    }
}

然后使用它来设置我的提供商的权限:

    @Override
public void onRequestPermissionsResult(int requestCode,
        String permissions[], int[] grantResults) {
    switch (requestCode) {
        case MY_PERMISSIONS_REQUEST_READ_CONTACTS: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                // permission was granted, yay! Do the
                // contacts-related task you need to do.

            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
            }
            return;
        }

        // other 'case' lines to check for other
        // permissions this app might request
    }
}

问题是我不知道我必须在项目的哪一部分提出此权限请求:我使用 Auth0 自定义 UI 身份验证进行登录，使用 Mysqlite 作为内部数据库，使用 GoogleCards 作为 ListView。

您能帮我了解如何授予此权限拒绝吗？

非常感谢

Answer 1

嗯，我建议使用 Ask ，它是一个权限辅助库。

使用它，您不必编写太多代码，只需两行即可为您完成工作。

以下是使用详情。

首先，在 build.gradle 中编译依赖项:

dependencies {
    compile 'com.vistrav:ask:2.4'
}

然后在 OnCreate 中的 Activity 开始时或按下任何按钮时，您可以像这样请求权限:

Ask.on(this)
    .forPermissions(Manifest.permission.READ_CONTACTS)
    .go();

就是这样。

您可以找到更多信息here 。我几乎在所有项目中都使用它，而且简单易用。