一、屏蔽系统短信功能

1、屏蔽所有短信

android 4.2 短信发送流程分析可参考这篇 戳这

源码位置 vendor\mediatek\proprietary\packages\apps\Mms\src\com\android\mms\transaction\SmsReceiverService.java

private void handleSmsReceived(Intent intent, int error) {
    //2018-10-09 cczheng  add for intercept mms notifications  start
    if (true) {
        Log.i("SmsReceived", "handleSmsReceived");
        return;
    }
    //2018-10-09 cczheng add for intercept mms notifications  end

    SmsMessage[] msgs = Intents.getMessagesFromIntent(intent);
    /// M:Code analyze 022, check null @{
    if (msgs == null) {
        MmsLog.e(MmsApp.TXN_TAG, "getMessagesFromIntent return null.");
        return;
    }
    MmsLog.d(MmsApp.TXN_TAG, "handleSmsReceived SmsReceiverService");
    /// 
    ......
}

在handleSmsReceived（）方法中直接return即可，不去解析和分发短信消息，同时这样操作 短信将不会记录到短信数据库中,插入短信消息到数据库的方法见下文insertMessage（)方法。

2、屏蔽特定的短信(特定的短信号码或者短信内容)

源码位置同上

• SmsMessage.getOriginatingAddress() 获取短信号码

• SmsMessage.getMessageBody() 获取短信内容

    private void handleSmsReceived(Intent intent, int error) {
        SmsMessage[] msgs = Intents.getMessagesFromIntent(intent);
        .....
  
        /// M:Code analyze 024, print log @{
        SmsMessage tmpsms = msgs[0];
        MmsLog.d(MmsApp.TXN_TAG, "handleSmsReceived" + (tmpsms.isReplace() ? "(replace)" : "")
            + " messageUri: " + messageUri
            + ", address: " + tmpsms.getOriginatingAddress()
            + ", body: " + tmpsms.getMessageBody());
        /// @
  
        //2018-10-09 cczheng add for intercept mms notifications  start
        if ("10010".equals(tmpsms.getOriginatingAddress()) || "话费".contains(tmpsms.getMessageBody())) {
            Log.i("SmsReceived", "handleSmsReceived");
            return;
        }
        //2018-10-09 cczheng  add for intercept mms notifications  end
  
        ....
    }

是否插入短信消息到数据库,insertMessage（)方法在handleSmsReceived()中调用

private Uri insertMessage(Context context, SmsMessage[] msgs, int error, String format) {
    // Build the helper classes to parse the messages.
    if (msgs == null) {
        MmsLog.e(MmsApp.TXN_TAG, "insertMessage:getMessagesFromIntent return null.");
        return null;
    }
    /// @}
    SmsMessage sms = msgs[0];

    if (sms.getMessageClass() == SmsMessage.MessageClass.CLASS_0) {
        MmsLog.d(MmsApp.TXN_TAG, "insertMessage: display class 0 message!");
        displayClassZeroMessage(context, msgs, format);
        return null;
    } else if (sms.isReplace()) {
        MmsLog.d(MmsApp.TXN_TAG, "insertMessage: is replace message!");
        return replaceMessage(context, msgs, error);
    } else {
        MmsLog.d(MmsApp.TXN_TAG, "insertMessage: stored directly!");
        return storeMessage(context, msgs, error);
    }
}

3、应用层拦截短信(不用修改android源码，原理就是用你的app去替代系统默认的短信app，过程略繁琐)

需要添加SmsReceiver，MmsReceiver，ComposeSmsActivity，HeadlessSmsSendService这几个类，并在AndroidManifest中进行相应配置，具体流程可参考这篇 戳这

二、屏蔽系统来电响铃和通知提示

屏蔽系统来电可分为三个步骤

1.来电静音，不响铃

2.来电挂断，不出现IncallActivity

3、拦截未接来电通知，不显示在状态栏StatusBar中

ps：此种修改方式的弊端在于来电时网络数据会离线2s左右

好，现在我们开始按这三个步骤来修改源码

1.来电静音，不响铃

源码位置 packages/services/Telecomm/src/com/android/server/telecom/Ringer.java

private void updateRinging(Call call) {
    if (mRingingCalls.isEmpty()) {
        stopRinging(call, "No more ringing calls found");
        stopCallWaiting(call);
    } else {
        //2018-10-10 cczheng add  anotation function startRingingOrCallWaiting() for silen