在我的应用程序，我会保持一个联系人列表。

In my app I will maintain a list of contacts.

从列表中的联系人的任何通话将被丢弃。他们将在未接来电显示，但手机不会响。

Any calls from contacts in the list will be dropped. They will show under missed calls but the phone will not ring.

推荐答案

首先，创建这个接口：

  public interface ITelephony {

        boolean endCall();

        void answerRingingCall();

        void silenceRinger();

  }

然后建立这个类，扩展的BroadcastReceiver

Then Create this class that extends BroadcastReceiver

public class IncomingCallReceiver extends BroadcastReceiver {
    private ITelephony telephonyService;
    private String blacklistednumber = "+458664455";

    @Override
    public void onReceive(Context context, Intent intent) {

       TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
       try {
         Class c = Class.forName(tm.getClass().getName());
         Method m = c.getDeclaredMethod("getITelephony");
         m.setAccessible(true);
         ITelephony telephonyService = (ITelephony) m.invoke(tm);
         Bundle bundle = intent.getExtras();
         String phoneNumber = bundle.getString("incoming_number");
         Log.e("INCOMING", phoneNumber);
         if ((phoneNumber != null) && phoneNumber.equals(blacklistednumber)) { 
            telephonyService.silenceRinger();
            telephonyService.endCall();
            Log.e("HANG UP", phoneNumber);
         }

       } catch (Exception e) {
         e.printStackTrace();
       }
}

这只会阻止单个联系号码，但你明白了吧。

This will only block that single phonenumber, but you get the point.

在你的清单中补充一点：

In your manifest add this:

<receiver android:name=".IncomingCallReceiver">
    <intent-filter android:priority="999">
        <action android:name="android.intent.action.PHONE_STATE" />
    </intent-filter>
</receiver>
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.PROCESS_INCOMING_CALLS" />