Question

我正在尝试通过短信发送用户位置。我可以获得用户位置但是它需要很多时间，而smsmanager发送带有null值的位置的消息可以有人看到我的代码或指导我这里有什么问题。谢谢！

    public class MainActivity extends AppCompatActivity {
    public Button button;

    private LocationManager locationManager;
    private LocationListener listener;
    private String gpslonla;
    private TextView t;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {


            @Override
            public void onClick(View view) {
                getlocation();
                sendlocationsms();

            }


            private void sendlocationsms() {
                String phoneNumber = "903399000";
                //Location location = new Location("dummyprovider");

                SmsManager smsManager = SmsManager.getDefault();
                StringBuffer smsBody = new StringBuffer();
                smsBody.append("http://maps.google.com?q="+gpslonla);

                //smsBody.append(location.getLatitude());
                //smsBody.append(",");
                //smsBody.append(location.getLongitude());
                smsManager.sendTextMessage(phoneNumber, null, smsBody.toString(), null, null);
                int gravity = Gravity.CENTER; // the position of toast
                int xOffset = 0; // horizontal offset from current gravity
                int yOffset = 0; // vertical offset from current gravity
                Toast toast = Toast.makeText(getApplicationContext(), "Your message has been sent    ", Toast.LENGTH_SHORT);
                toast.setMargin(50, 50);
                toast.setGravity(gravity, xOffset, yOffset);
                toast.show();

            }

        });

    }

    private void getlocation() {

        locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

        listener = new LocationListener() {
            @Override
            public void onLocationChanged(Location location) {
                gpslonla=location.getLongitude() + "," + location.getLatitude();


            }

            @Override
            public void onStatusChanged(String s, int i, Bundle bundle) {

            }

            @Override
            public void onProviderEnabled(String s) {

            }

            @Override
            public void onProviderDisabled(String s) {
                Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                startActivity(i);

            }
        };
        configure_button();
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode) {
            case 10:
                configure_button();
                break;
            default:
                break;
        }
    }

    void configure_button() {
        // first check for permissions
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.INTERNET}
                        , 10);
            }
            return;
        }
        // this code won't execute IF permissions are not allowed, because in the line above there is return statement.
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //noinspection MissingPermission
                locationManager.requestLocationUpdates("gps", 5000, 0, listener);
            }
        });
    }
}

Answer 1

收到位置时，必须调用sendlocationsms（）方法。使用以下命令更改onClick方法：

编辑：

声明一个初始值为false的布尔变量：

boolean needsToSendSms = false;

然后：

    @Override
    public void onClick(View view) {
        needsToSendSms = true;
        getlocation();
    }

当位置随

变化时调用它

    @Override
    public void onLocationChanged(Location location) {
        gpslonla=location.getLongitude() + "," + location.getLatitude();
        if(needsToSendSms) {
            sendlocationsms();
            needsToSendSms = false;
        }

    }

添加布尔变量使得每次点击只发送一个短信。

我希望这会有所帮助。

我想通过android中的短信发送用户位置

1 个答案: