如何在黑莓中将字符串值从一个屏幕发送到另一个屏幕?

问题描述

任何人都请帮我将字符串值从一个屏幕传递到黑莓中的另一个屏幕

Anyone please help me to pass String value from one screen to another screen in Blackberry

推荐答案

我想说的是从第一个屏幕推送第二个屏幕，而不是从应用程序中推送.
应用内推送第一屏:

I would say to do pushing 2nd screen from the 1st screen, not from the application.
In app push first screen:

public class App extends UiApplication {
    public static void main(String[] args) {
        App app = new App();
        app.enterEventDispatcher();
    }
    public App() {
        FirstScreen scr = new FirstScreen();
        pushScreen(scr);
    }
}

第二个屏幕有一个字符串值的设置器:

Second screen has a setter for string value:

public class SecondScreen extends MainScreen {

    String mTextValue = null;
    LabelField mLabel = null;

    public void setTextValue(String textValue) {
        mTextValue = textValue;
        mLabel.setText(mTextValue);
    }

    public SecondScreen() {
        super();
        mLabel = new LabelField();
        add(mLabel);
    }
}

在第一个屏幕中创建第二个，设置字符串值并推送它.如果您不需要返回，则弹出第一个屏幕:

In first screen create second, set string value and push it. Pop first screen if you don't need to return on it:

public class FirstScreen extends MainScreen implements FieldChangeListener {

    BasicEditField mEdit = null;
    ButtonField mButton = null;

    public FirstScreen() {
        super();
         mEdit = new BasicEditField("input: ", "some text");
         add(mEdit);
         mButton = new ButtonField("Go second screen");
         mButton.setChangeListener(this);
         add(mButton);
    }
    public void fieldChanged(Field field, int context) {
        if(mButton == field)
        {
            SecondScreen scr = new SecondScreen();
            scr.setTextValue(mEdit.getText());
            UiApplication.getUiApplication().pushScreen(scr);
            UiApplication.getUiApplication().popScreen(this);
        }
    }
}

这篇关于如何在黑莓中将字符串值从一个屏幕发送到另一个屏幕?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！