How to block calls in android

Question

I want to block calls from few numbers  for that I want to write a app of my own  So what are the APIs which I should be using   Basically I want to get notified when a call comes  i want to compare numbers if it is what i want to block  i want to cut the call or mute it or if possible mute it and record it

User · Answer

You can do it by listening to phone call events . You do it by having a BroadcastReceiver to PHONE_STATE and to NEW_OUTGOING_CALL. You find there what is the phone number.

Then when you decide to end the call, this is a bit tricky, because only from Android P it's guaranteed to work. Check here.

User · Answer

OMG    YES  WE CAN DO THAT    I was going to kill myself after severe 24 hours of investigating and discovering    But I ve found  fresh  solution       cheat  with Java reflection to gain access to TelephonyManager s    ITelephony getter Class c   Class forName tm getClass   getName     Method m   c getDeclaredMethod  getITelephony    m setAccessible true   telephonyService    ITelephony m invoke tm     all all all of hundreds of people who wants to develop their call-control software visit this start point  there is a project  and there are important comments  and credits   briefly  copy aidl file  add permissions to manifest  copy-paste source for telephony management      Some more info for you  AT commands you can send only if you are rooted  Than you can kill system process and send commands but you will need a reboot to allow your phone to receive and send calls       I m very hapy    Now my Shake2MuteCall will get an update

User · Answer

In android-N  this feature is included in it  check Number-blocking update for android N     Android N now supports number-blocking in the platform and provides a   framework API to let service providers maintain a blocked-number list    The default SMS app  the default phone app  and provider apps can read   from and write to the blocked-number list  The list is not accessible   to other app    advantage of are    Numbers blocked on calls are also blocked on texts Blocked numbers can persist across resets and devices through the Backup  amp  Restore feature Multiple apps can use the same blocked numbers list   For more information  see android provider BlockedNumberContract    Update an existing project   To compile your app against the Android N platform  you need to use the Java 8 Developer Kit  JDK 8   and in order to use some tools with Android Studio 2 1  you need to install the Java 8 Runtime Environment  JRE 8    Open the build gradle file for your module and update the values as follows   android     compileSdkVersion  android-N    buildToolsVersion 24 0 0 rc1          defaultConfig        minSdkVersion  N       targetSdkVersion  N

User · Answer

You could just re-direct specific numbers in your contacts to your voice-mail   That s already supported   Otherwise I guess the documentation for  Contacts  would be a good place to start looking

User · Answer

It is possible and you don t need to code it on your own    Just set the ringer volume to zero and vibration to none if incomingNumber equals an empty string  Thats it       Its just done for you with the application Nostalk from Android Market  Just give it a try

[android] How to block calls in android

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