如何在黑莓中制作状态栏？

Question

我想在屏幕底部设置状态栏，它应该在左侧和右侧显示一个按钮。你可以在下面看到我的屏幕。 我的代码是这样的..

private void BottomLayout() 
    {
        Bitmap topBg = Bitmap.getBitmapResource(ImageName.topbar);
        final Bitmap topBg1 = cmn_fun.resizeBitmap(topBg, SCREEN_WIDTH, topBg.getHeight());
        HorizontalFieldManager hfmbottom = new HorizontalFieldManager(Field.USE_ALL_WIDTH)
        {
            protected void paintBackground(Graphics graphics) 
            {
                graphics.drawBitmap(0,0,SCREEN_WIDTH,topBg1.getHeight(), topBg1,0,0 );             
                super.paint(graphics);
            }
            protected void sublayout(int maxWidth, int maxHeight) {
                // TODO Auto-generated method stub
                super.sublayout(topBg1.getWidth(), topBg1.getHeight());
                setExtent(topBg1.getWidth(), topBg1.getHeight());
            }

        };

        Bitmap imgprv=Bitmap.getBitmapResource(ImageName.btn_prev);
        Bitmap imgprv_sel=Bitmap.getBitmapResource(ImageName.btn_prev_sel);     
        btn_prev=new CustomButtonField(0, "", imgprv_sel, imgprv, Field.FIELD_LEFT);
        hfmbottom.add(btn_prev);

        Bitmap imgnext=Bitmap.getBitmapResource(ImageName.btn_next);
        Bitmap imgnext_sel=Bitmap.getBitmapResource(ImageName.btn_next_sel);        
        btn_next=new CustomButtonField(0, "", imgnext_sel, imgnext, Field.FIELD_RIGHT);
        hfmbottom.add(btn_next);


        setStatus(hfmbottom);

    }

提前致谢。

Answer 1

我只向您发布状态栏面板。

实际上在 Horizo​​ntalFieldManager 中它确实会产生问题。

因此找到了以下方法并且有效。它确实添加了额外的代码，但它有效

import net.rim.device.api.system.Bitmap;
import net.rim.device.api.system.Display;
import net.rim.device.api.ui.DrawStyle;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.Manager;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.container.GridFieldManager;
import net.rim.device.api.ui.container.HorizontalFieldManager;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;

class SampleBottomPanelScreen extends MainScreen {

private HorizontalFieldManager title_bar;

private VerticalFieldManager btn1_manager;
private ButtonField btn1;
private VerticalFieldManager btn2_manager;
private ButtonField btn2;
Bitmap bg_image;

public SampleBottomPanelScreen() {

    //bg_image = Bitmap.getBitmapResource("backgroundImage.png");

    btn1_manager = new VerticalFieldManager(VerticalFieldManager.FIELD_LEFT) {

         protected void sublayout(int maxWidth, int maxHeight)
         {
                int displayWidth = Display.getWidth() / 2;
                int displayHeight = Display.getHeight();

                super.sublayout( displayWidth, displayHeight);
                setExtent( displayWidth, displayHeight);
         }  
    };

    btn2_manager = new VerticalFieldManager(VerticalFieldManager.FIELD_RIGHT | VerticalFieldManager.USE_ALL_WIDTH) {

         protected void sublayout(int maxWidth, int maxHeight)
         {
                int displayWidth = Display.getWidth() / 2;
                int displayHeight = Display.getHeight();

                super.sublayout( displayWidth, displayHeight);
                setExtent( displayWidth, displayHeight);
         }  
    };

    title_bar = new HorizontalFieldManager(Manager.USE_ALL_WIDTH){

        public void paint(Graphics graphics) {
            graphics.setBackgroundColor(0x2bb1ff);
            graphics.clear();

            super.paint(graphics);
        }

        protected void sublayout(int maxWidth, int maxHeight)
        {
            int displayWidth = Display.getWidth();
            int displayHeight = Display.getHeight() / 8;

            super.sublayout( displayWidth, displayHeight);
            setExtent( displayWidth, displayHeight);
        }   
    };

    btn1 = new ButtonField("Submit", ButtonField.LEFT | ButtonField.FIELD_LEFT);
    btn2 = new ButtonField("Cancel", ButtonField.RIGHT| ButtonField.FIELD_RIGHT);

    btn1_manager.add(btn1);
    btn2_manager.add(btn2);

    title_bar.add(btn1_manager);
    title_bar.add(btn2_manager);

    this.add(title_bar);
}
 }

Answer 2

尝试布局管理器类

    package com.doapps.blackberry.layouts;

import net.rim.device.api.system.Display;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.Manager;

public class LayoutManager extends Manager 
{
    int n;
    public LayoutManager(int n) 
    {
        super(Manager.NO_VERTICAL_SCROLL);
        this.n =n;
    }

    protected void sublayout(int width, int height)
    {
        if(n==2)
        {
            Field first = getField(0);
            Field second = getField(1);
            layoutChild(first, this.getPreferredWidth(), this.getPreferredHeight());
            layoutChild(second, this.getPreferredWidth(), this.getPreferredHeight());
            setPositionChild(first,0, getPreferredHeight() -first.getHeight());
            setPositionChild(second,getPreferredWidth()-second.getWidth(), getPreferredHeight() -first.getHeight());

            setExtent(width, height);
        }
        if(n==1)
        {
            Field second= getField(0);
            layoutChild(second, this.getPreferredWidth(), this.getPreferredHeight());
            setPositionChild(second,getPreferredWidth()-second.getWidth(), getPreferredHeight() -second.getHeight());
            setExtent(width, height);
        }
    }
    public int getPreferredHeight() {
        return 45;
    }

    public int getPreferredWidth() {
        return Display.getWidth();
    }
} 

Answer 3

我认为你需要使用 GridFieldManager。根据您的需要重新排列以下代码片段并使用填充...

    private HorizontalFieldManager createRightTab () {

        HorizontalFieldManager hMgr = new HorizontalFieldManager(Field.FIELD_RIGHT);
        ImageButtonField button = new ImageButtonField ( Bitmap.getBitmapResource(res.button_1), button_w, button_h);
        button.setFocusListener(this);
        hMgr.add(button);

        return hMgr;
    }

    private HorizontalFieldManager createLeftTab () {

        HorizontalFieldManager hMgr = new HorizontalFieldManager(Field.FIELD_LEFT);
        ImageButtonField button = new ImageButtonField ( Bitmap.getBitmapResource(res.button_2), button_w, button_h);
        button.setFocusListener(this);
        hMgr.add(button);

        return hMgr;
    }

    public void GridControlScreen() {

        int w = net.rim.device.api.system.Display.getWidth();

        gridMgr = new GridFieldManager(1, 3, 0);
        gridMgr.setColumnProperty(0, GridFieldManager.FIXED_SIZE, (button_w));
        gridMgr.setColumnProperty(1, GridFieldManager.FIXED_SIZE, (w-(2*button_w)));
        gridMgr.setColumnProperty(2, GridFieldManager.FIXED_SIZE, (button_w));

        HorizontalFieldManager hMgr_a = createLeftTab();
        HorizontalFieldManager hMgr_center = new HorizontalFieldManager();
        HorizontalFieldManager hMgr_b = createRightTab();

        gridMgr.add(hMgr_a);
        gridMgr.add(hMgr_center);
        gridMgr.add(hMgr_b);

        add(gridMgr);
    }

希望这可以有所帮助。

Answer 4

试试这个

private void BottomLayout() 
    {
        Bitmap topBg = Bitmap.getBitmapResource(ImageName.topbar);
        final Bitmap topBg1 = cmn_fun.resizeBitmap(topBg, SCREEN_WIDTH, topBg.getHeight());
        HorizontalFieldManager hfmbottom = new HorizontalFieldManager(Field.USE_ALL_WIDTH)
        {
            protected void paintBackground(Graphics graphics) 
            {
                graphics.drawBitmap(0,0,SCREEN_WIDTH,topBg1.getHeight(), topBg1,0,0 );             
                super.paint(graphics);
            }
            protected void sublayout(int maxWidth, int maxHeight) {
                // TODO Auto-generated method stub
                super.sublayout(topBg1.getWidth(), topBg1.getHeight());
                setExtent(topBg1.getWidth(), topBg1.getHeight());
            }

        };

        Bitmap imgprv=Bitmap.getBitmapResource(ImageName.btn_prev);
        Bitmap imgprv_sel=Bitmap.getBitmapResource(ImageName.btn_prev_sel);     
        btn_prev=new CustomButtonField(0, "", imgprv_sel, imgprv, Field.FIELD_LEFT);
        hfmbottom.add(btn_prev);

        Bitmap imgnext=Bitmap.getBitmapResource(ImageName.btn_next);
        Bitmap imgnext_sel=Bitmap.getBitmapResource(ImageName.btn_next_sel);        
        btn_next=new CustomButtonField(0, "", imgnext_sel, imgnext, Field.FIELD_RIGHT);
        btn_next.setPadding(0, 0, 0, Display.getWidth()-btn_prev.getWidth()-btn_next.getWidth());
        hfmbottom.add(btn_next);


        setStatus(hfmbottom);

    }

Answer 5

这是我们可以设置字段左侧和右侧的另一种方式。
http://keraisureshvblackberry.blogspot.in /2012/02/there-are-very-common-there-there-are.html