在Android中检索来电的电话号码

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

public class CallReceiver extends PhoneStateListener {

    private Context context;

    public CallReceiver(Context context) {
        this.context = context;
    }

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

        switch (state) {
            case TelephonyManager.CALL_STATE_RINGING:
                // 电话进来时，phoneNumber为来电号码
                break;
            case TelephonyManager.CALL_STATE_OFFHOOK:
                // 接听电话时，phoneNumber为对方号码
                break;
            case TelephonyManager.CALL_STATE_IDLE:
                // 挂断电话时，phoneNumber为空
                break;
        }
    }
}

<uses-permission android:name="android.permission.READ_PHONE_STATE" />

TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
CallReceiver callReceiver = new CallReceiver(context);
telephonyManager.listen(callReceiver, PhoneStateListener.LISTEN_CALL_STATE);

telephonyManager.listen(callReceiver, PhoneStateListener.LISTEN_NONE);