java - 如何以编程方式阻止 Android Nougat、Oreo 及更高版本中的调用？

Question

此代码在 Android 6 (Marshmallow) 之前工作正常:

TelephonyManager tm = (TelephonyManager) context
        .getSystemService(Context.TELEPHONY_SERVICE);
Class c = Class.forName(tm.getClass().getName());
Method m = c.getDeclaredMethod("getITelephony");
m.setAccessible(true);
Object telephonyService = m.invoke(tm); 
c = Class.forName(telephonyService.getClass().getName()); 
m = c.getDeclaredMethod("endCall"); 
m.setAccessible(true); 
m.invoke(telephonyService);

After reading documentation

我仍然调用了 endCall(context, number)，无法阻止调用。需要适用于 Android Nougat、Oreo、Pie 及更高版本的解决方案。

更新

我包含了官方 Nougat 文档中的以下代码，但该号码仍未添加到黑名单中。

Cursor c = mContext.getContentResolver().query(BlockedNumberContract.BlockedNumbers.CONTENT_URI,
                    new String[]{BlockedNumberContract.BlockedNumbers.COLUMN_ID,
                            BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER,
                            BlockedNumberContract.BlockedNumbers.COLUMN_E164_NUMBER}, null, null, null);

Answer 1

Android 9不能使用非SDK接口(interface)

Android 9 introduces new restrictions on the use of non-SDK interfaces, whether directly, via reflection, or via JNI. These restrictions are applied whenever an app references a non-SDK interface or attempts to obtain its handle using reflection or JNI.

看起来你无法读取或写入 BlockedNumberContract 除非它是系统应用程序或默认拨号器或默认短信应用程序

Permissions

Only the system, the default SMS application, and the default phone app (See TelecomManager.getDefaultDialerPackage()), and carrier apps (See CarrierService) can read, and write to the blockednumber provider. However, canCurrentUserBlockNumbers(Context) can be accessed by any application.