android 电话拦截

package com.android.internal.telephony;
    interface ITelephony{
        boolean endCall();　　// 这个是后面用来被调用结束通话的
        void answerRingingCall();
    }

public class BlackListPhoneReceiver extends BroadcastReceiver {
    private TelephonyManager tm;
    @Override
    public void onReceive(Context context, Intent intent) {
        // 获取黑名单数据，和这个收信人进行比较
        JXBlackListDao dao = new JXBlackListDao(context);
        List<BlackListContact> blackListContacts = dao.queryAll();
        tm = (TelephonyManager) context.getSystemService(Service.TELEPHONY_SERVICE);
        // 监听电话的状态，就是是否有电话呼入
        switch (tm.getCallState()) {
            case TelephonyManager.CALL_STATE_RINGING:   // 开始响铃
                String incomingNum = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);　　// 获取来电的号码
                // 这个来电号码和黑名单中的进行比较(这里是将手机里面的黑名单数据库，这个库是自己创建并且添加号码的),如果这个号码和黑名单中的号码相同那么就挂掉这个电话并且删除他的通话记录，这里删除通话记录的方式是最简单的
                for (BlackListContact contact :
                        blackListContacts) {
                    if (contact.getPhone().equals(incomingNum)
                            && (contact.getType() == BlackListContact.BlackType.ALL
                            || contact.getType() == BlackListContact.BlackType.PHONE)) {
                        endCall();
                        SystemClock.sleep(1000);
                        // 删除通话记录
                        ContentResolver resolver = context.getContentResolver();
                        Uri uri = Uri.parse("content://call_log/calls");
                        resolver.delete(uri, "number=?", new String[]{incomingNum});
                    }
                }
                Toast.makeText(context, "来电是" + incomingNum, Toast.LENGTH_SHORT).show();
                break;
        }
    }
    // 挂断电话
    private void endCall() {
        Log.e("John", "BlackListReceiver" + " # " + "end call method running ");
        Class<TelephonyManager> clz = TelephonyManager.class;
        try {
            Method getITelephony = clz.getDeclaredMethod("getITelephony", null);
            getITelephony.setAccessible(true);
            ITelephony iTelephony = null;
            Log.e("John", "BlackListReceiver" + " # " + "end call");
            iTelephony = (ITelephony) getITelephony.invoke(tm, null);
            iTelephony.endCall();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (RemoteException e) {
            Log.e("John", "BlackListReceiver" + " # " + "endcall error");
            e.printStackTrace();
        }
    }
}

public class BlackListService extends Service {

private BlackListPhoneReceiver phoneReceiver;

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onCreate() {// 电话监听的广播注册
        phoneReceiver = new BlackListPhoneReceiver();
        IntentFilter filter2 = new IntentFilter();
        filter2.addAction("android.intent.action.NEW_OUTGOING_CALL");
        filter2.addAction("android.intent.action.PHONE_STATE");
        filter.setPriority(Integer.MAX_VALUE);
        registerReceiver(phoneReceiver, filter2);    // 注册广播
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        // 关闭服务
        msgReceiver = null;
        phoneReceiver = null;
    }

}