如何在Android手机中禁用传入和传出呼叫

Question

I want to disable the feature of incoming and outgoing calls in the Android phone.My android phone should only allow GPRS & other applications to be run.

My Android model is Samsung Ace

Please suggest me solution regarding this. Thanks in Advance.

Answer 1

This code will block your all call (INCOMING AND OUTGOING)

import java.lang.reflect.Method;

import android.content.Context;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;

import com.CallLogApp.helper.BlockNumberHelper;
import com.CallLogApp.util.UDF;
import com.android.internal.telephony.ITelephony;

public class CustomPhoneStateListener extends PhoneStateListener {

    //private static final String TAG = "PhoneStateChanged";
    Context context;
    public CustomPhoneStateListener(Context context) {
        super();
        this.context = context;
    }

    @Override
    public void onCallStateChanged(int state, String outGoingNumber) {
        super.onCallStateChanged(state, outGoingNumber);

        switch (state) {
            case TelephonyManager.CALL_STATE_IDLE:
                break;
            case TelephonyManager.CALL_STATE_OFFHOOK:
                endCallIfBlocked(outGoingNumber);
                break;
            case TelephonyManager.CALL_STATE_RINGING:
                break;
            default:
                break;
        }

     }

     private void endCallIfBlocked(String outGoingNumber) {
        try {
            // Java reflection to gain access to TelephonyManager's
            // ITelephony getter
            TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
            Class<?> c = Class.forName(tm.getClass().getName());
            Method m = c.getDeclaredMethod("getITelephony");
            m.setAccessible(true);
            com.android.internal.telephony.ITelephony telephonyService = (ITelephony) m.invoke(tm);  

            if (new BlockNumberHelper(context).isBlocked(outGoingNumber))
            {
                telephonyService = (ITelephony) m.invoke(tm);
                telephonyService.silenceRinger();
                telephonyService.endCall();
            }


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

Here CALL_STATE_OFFHOOK state will call each time when your call going to connect and when you received incoming call

There is no any method that you can know weather it is incoming call or outgoing call

But you can end call which is going to connect in both scenario

Answer 2

Anything you delevop using google's android API..

Would be located in the Applications layer of Android's architcture . But managing calls is something implemented in the Applications Framework layer. So:

• If you want to block calls from an application you can't avoid the phone call state to happen, so once the telephony manager has handled the call, end it with telephonyService.endCall().

• If you really need calls not to reach your application layer.. I think a custom android compilation would be needed

• But have you considered that some mobile telephony providers offer "data cards" for which they block voice channels? These are the kind of cards that come in 3G mobile internet modems