Question

我是Android新手。我正在通过启动应用程序研究拨号器。我从菜单中隐藏了我的应用程序图标。我成功地从Dialer在jellybean和Kitkat Device中打开应用程序，但是当我在Lollipop和Marshmallow系统中打开应用程序时，让我感觉异常，

E/GooglePlusContactsSync: Failed to clear out contacts
                                                       java.lang.SecurityException: Permission Denial: opening provider com.android.providers.contacts.ContactsProvider2 from ProcessRecord{ff7ceee 26321:com.google.android.apps.plus/u0a89} (pid=26321, uid=10089) requires android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS
                                                           at android.os.Parcel.readException(Parcel.java:1620)
                                                           at android.os.Parcel.readException(Parcel.java:1573)
                                                           at android.app.ActivityManagerProxy.getContentProvider(ActivityManagerNative.java:3594)
                                                           at android.app.ActivityThread.acquireProvider(ActivityThread.java:4799)
                                                           at android.app.ContextImpl$ApplicationContentResolver.acquireUnstableProvider(ContextImpl.java:2018)
                                                           at android.content.ContentResolver.acquireUnstableProvider(ContentResolver.java:1466)
                                                           at android.content.ContentResolver.query(ContentResolver.java:475)
                                                           at android.content.ContentResolver.query(ContentResolver.java:434)
                                                           at dit.a(PG:440)
                                                           at dit.b(PG:1388)
                                                           at diu.run(PG:325)
                                                           at java.lang.Thread.run(Thread.java:818)

E/DatabaseUtils: Writing exception to parcel
                                            java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/fs_id from pid=2208, uid=10089 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)

然后应用程序自动关闭。

Answer 1

Android 6.0（Marshmallow）推出了一种处理Android权限的新方法。 Read more about it here

从Android 6.0（API级别23）开始，用户授予权限应用程序运行时的应用程序，而非安装应用程序时的应用程序。这个方法简化了应用安装过程，因为用户没有需要在安装或更新应用程序时授予权限。它也是让用户更好地控制应用程序的功能;例如，用户可以选择让相机应用程序访问相机，但不能到设备位置。用户可以撤消任何权限时间，转到应用程序的“设置”屏幕。

您需要在清单中声明您的权限。检查当前状态：

// Assume thisActivity is the current activity
int permissionCheck = ContextCompat.checkSelfPermission(thisActivity,
        Manifest.permission.WRITE_CALENDAR);

如果您需要，请提出要求：

// 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.
    }
}

要处理Android中的运行时权限，我通常使用this library。它确实有助于减少代码样板。

Answer 2

在Android 6.0中，我们需要检查是否已授予权限，因此，为了阅读联系人，您需要首先检查是否已授予read_contacts权限。

尝试：

    if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
        requestPermissions(new String[]{Manifest.permission.CAMERA}, 101);
        return;
    } else {
        // permission already granted
    }

授予权限后

和监听器

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    switch (requestCode) {
        case 101:
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                // permission granted
            }
            break;
        default:
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }
    }

发生了Android java.lang.SecurityException

2 个答案: