java - 如何将字符串传递给另一个类中的另一个字符串变量？

Question

我有这个:

 @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

        String urlCorrecta="";


        //Si se escoge la posicion de el arreglo 0 abre la clase LasVegas
        if (position == 0)
        {
            Intent intent = new Intent(this, MainActivity.class);
            startActivity(intent);
            urlCorrecta = "souphttpsrc location=http://69.54.28.188:7878/mjpg/video.mjpg ! multipartdemux single-stream=true ! jpegdec ! autovideosink sync=false ";


        }

        //Si se escoge la posicion de el arreglo 1 abre la clase LosGuayabos
        else if (position == 1)

        {
            Intent intent = new Intent(this, LosGuayabos.class);
            startActivity(intent);

            urlCorrecta = "souphttpsrc location=http://rax1.bsn.net/mjpg/video.mjpg?streamprofile=Balanced ! multipartdemux single-stream=true ! jpegdec ! autovideosink sync=false ";

        }

        //Si se escoge la posicion de el arreglo 2 abre la clase RegionalNorte
        else if (position == 2)

        {
            Intent intent = new Intent(this, RegionalNorte.class);
            startActivity(intent);

            urlCorrecta = "souphttpsrc location=http://trackfield.webcam.oregonstate.edu/mjpg/video.mjpg ! multipartdemux single-stream=true ! jpegdec ! autovideosink sync=false ";
        }


        //Si se escoge la posicion de el arreglo 3 abre la clase RegionalSur
        else if (position == 3)

        {
            Intent intent = new Intent(this, RegionalSur.class);
            startActivity(intent);

            urlCorrecta = "souphttpsrc location=http://wmccpinetop.axiscam.net/mjpg/video.mjpg ! multipartdemux single-stream=true ! jpegdec ! autovideosink sync=false ";

        }

    }

我想将字符串 urlCorreta 的值传递给位于 MainActivity 类中的字符串 VIDEO_IN_PIPELINE。

public class MainActivity extends ActionBarActivity implements SurfaceHolder.Callback{




    private final String VIDEO_IN_PIPELINE = VALUE OF THE STRING urlCorrecta;
    private final String HOST_IP = "192.168.1.167";

}

我如何将该字符串从另一个类转移到这个类？

非常感谢您的阅读。

Answer 1

要从一个 Activity 发送字符串，

Intent intent = new Intent(CurrentActivity.this, ReceiverActivity.class);
intent.puExtra("key","String Value");
startActivity(intent);

在ReceiverActivity中获取字符串

Intent intent = getIntent();
String str = intent.getExtra().getString("key");