import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.support.v4.app.ActivityCompat;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;

/**
 * Created by BINGO on 2018/12/06.
 */

public class CallPhone {
    TelephonyManager tm;
    PhoneCallListener listener;

    public void callA(Activity activity) {
        try {
            Intent call = new Intent(Intent.ACTION_CALL);
            Uri data = Uri.parse("tel:" + "电话");
            call.setData(data);
            call.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            if (ActivityCompat.checkSelfPermission(activity, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
                return;
            }
            tm = (TelephonyManager) activity.getSystemService(Context.TELEPHONY_SERVICE);
            listener = new PhoneCallListener(activity);
            tm.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);

            activity.startActivity(call);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private class PhoneCallListener extends PhoneStateListener {
        private boolean bphonecalling = false;
        private Activity activity;

        public PhoneCallListener(Activity activity) {
            this.activity = activity;
        }

        @Override
        public void onCallStateChanged(int state, String incomingnumber) {
            // seems the incoming number is this call back always ""
            if (TelephonyManager.CALL_STATE_OFFHOOK == state) {
                bphonecalling = true;
            } else if (TelephonyManager.CALL_STATE_IDLE == state && bphonecalling) {
                if (tm != null) {
                    tm.listen(listener, PhoneStateListener.LISTEN_NONE);
                }
                bphonecalling = false;
                Intent i = null;
                i = activity.getPackageManager().getLaunchIntentForPackage(activity.getPackageName());
                i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
                activity.startActivity(i);
            }
            super.onCallStateChanged(state, incomingnumber);
        }
    }
}