SKPhone/app/src/main/java/com/sikey/skphone/ContactApplication.java

package com.sikey.skphone;

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.telephony.TelephonyManager;

import androidx.core.app.ActivityCompat;


public class ContactApplication extends android.app.Application {
    private static Context sContext;

    @Override
    public void onCreate() {
        super.onCreate();
        sContext = getApplicationContext();
    }

    public static Context getsContext() {
        return sContext;
    }

    public static boolean isInterruptCalling(Context context) {
        TelephonyManager tm = (TelephonyManager) context.getSystemService(TELEPHONY_SERVICE);//取得相关系统服务
        if (ActivityCompat.checkSelfPermission(context, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return true;
        }
        return tm.getSimState() != TelephonyManager.SIM_STATE_READY || tm.getVoiceNetworkType() == TelephonyManager.NETWORK_TYPE_UNKNOWN;
    }
}