在黑莓的网格布局中将字段对齐到右边

Question

我希望我的应用能够将两个字段，一个左边和另一个字段对齐到屏幕的最左端。为此我使用GridLayoutManager类。这里是我的代码

GridFieldManager gridFieldManager = new GridFieldManager(2,2, GridFieldManager.PREFERRED_SIZE_WITH_MAXIMUM); 

gridFieldManager.add(new ButtonField("Button One"), Field.FIELD_HCENTER); 
gridFieldManager.add(new ButtonField("Button Two"), Field.FIELD_RIGHT); 

gridFieldManager.add(new ButtonField("HC", Field.FIELD_HCENTER)); 
gridFieldManager.add(new ButtonField("RT", Field.FIELD_RIGHT)); 

add(gridFieldManager); 

而且，这里是我在模拟器输出

任何人都可以请帮我的两个按钮排列在屏幕的最右边？任何帮助将不胜感激。

Answer 1

请使用下面的类。

import net.rim.device.api.ui.Field; 
import net.rim.device.api.ui.container.HorizontalFieldManager; 

public class HFMLeftFieldRightField extends HorizontalFieldManager { 

private Field leftField; 
private Field rightField; 

private final static int TOP_MARGIN = 0; 
private final static int LEFT_MARGIN = 30; 

public HFMLeftFieldRightField() { 
    super(USE_ALL_WIDTH); 
} 

public HFMLeftFieldRightField(boolean isQatari) { 
    super(USE_ALL_WIDTH | Field.FIELD_LEFT); 
} 

public void sublayout(int maxWidth, int maxHeight) { 

    super.sublayout(maxWidth, maxHeight); 
    int width = getWidth(); 

    if (rightField != null) { 
    int x = width - rightField.getWidth() - LEFT_MARGIN; 
    int y = TOP_MARGIN; 
    setPositionChild(rightField, x, y); 
    } 
    if (leftField != null) { 
    int y = TOP_MARGIN+rightField.getHeight()/5; 
    int x = LEFT_MARGIN; 
    setPositionChild(leftField, 0, y); 
    } 

    setExtent(maxWidth, rightField.getHeight() + TOP_MARGIN * 2); 
} 

public void setLeftButton(Field leftField) { 
    this.leftField = leftField; 
super.add(leftField); 
} 

public void setRightButton(Field rightField) { 
    this.rightField = rightField; 
    super.add(rightField); 
} 


} 

并添加这个字段。

HFMLeftFieldRightField hfm = new HFMLeftFieldRightField(); 
hfm.setLeftButton(new EditField("Left")); 
hfm.setRightButton(new EditField("Right")); 
add(hfm); 

更多细节http://keraisureshvblackberry.blogspot.in/2012/02/there-are-very-common-there-there-are.html

希望有帮助..

Answer 2

更改您的gridFieldManager构造样式参数 GridFieldManager.USE_ALL_WIDTH

它应该是这样的

GridFieldManager gridFieldManager = new GridFieldManager(2,2,GridFieldManager.USE_ALL_WIDTH); 

Answer 3

好像你应该使用JustifiedHorizo​​ntalFieldManager，而不是GridFieldManager。 JustifiedHorizo​​ntalFieldManager不是BlackBerry SDK中包含的标准管理器，而是RIM稍后发布的一组UI组件中的一员，可帮助开发人员构建更丰富的UI界面。你必须从here下载代码，将其添加到您的proyect然后包括以下行：

JustifiedHorizontalFieldManager justifiedManager = new JustifiedHorizontalFieldManager(buttonOne, buttonTwo, false, USE_ALL_WIDTH); 

Answer 4

基本上它的定位标志和网格的列属性的所有问题。

将GridFieldManager样式更改为Manager.USE_ALL_WIDTH并将列属性设置为GridFieldManager.AUTO_SIZE使所有可用空间在两列之间进行事件划分。

gridFieldManager.setColumnProperty(0, GridFieldManager.AUTO_SIZE, 0); 
gridFieldManager.setColumnProperty(1, GridFieldManager.AUTO_SIZE, 0); 

---

下面的代码段

GridFieldManager gridFieldManager = new GridFieldManager(2,2, Manager.USE_ALL_WIDTH); 
gridFieldManager.setColumnProperty(0, GridFieldManager.AUTO_SIZE, 0); 
gridFieldManager.setColumnProperty(1, GridFieldManager.AUTO_SIZE, 0); 

gridFieldManager.add(new ButtonField("Button One"), Field.FIELD_LEFT); 
gridFieldManager.add(new ButtonField("Button Two"), Field.FIELD_RIGHT); 
gridFieldManager.add(new ButtonField("HC"), Field.FIELD_LEFT); 
gridFieldManager.add(new ButtonField("RT"), Field.FIELD_RIGHT); 

add(gridFieldManager); 

产生

---

这稍微修改代码段

GridFieldManager gridFieldManager = new GridFieldManager(1,2, Manager.USE_ALL_WIDTH); 
gridFieldManager.setColumnProperty(0, GridFieldManager.AUTO_SIZE, 0); 
gridFieldManager.setColumnProperty(1, GridFieldManager.AUTO_SIZE, 0); 

VerticalFieldManager vfmLeft = new VerticalFieldManager(); 
vfmLeft.add(new ButtonField("Button One", Field.FIELD_HCENTER)); 
vfmLeft.add(new ButtonField("HC", Field.FIELD_HCENTER)); 
gridFieldManager.add(vfmLeft, Field.FIELD_LEFT); 

VerticalFieldManager vfmRight = new VerticalFieldManager(); 
vfmRight.add(new ButtonField("Button Two", Field.FIELD_HCENTER)); 
vfmRight.add(new ButtonField("RT", Field.FIELD_HCENTER)); 
gridFieldManager.add(vfmRight, Field.FIELD_RIGHT); 

add(gridFieldManager); 

产生

---

最后，要说明我以前说过的可用空间被两列之间evently分，下面的代码片段

GridFieldManager gridFieldManager = new GridFieldManager(1,2, Manager.USE_ALL_WIDTH | Manager.USE_ALL_HEIGHT); 
gridFieldManager.setColumnProperty(0, GridFieldManager.AUTO_SIZE, 0); 
gridFieldManager.setColumnProperty(1, GridFieldManager.AUTO_SIZE, 0); 
gridFieldManager.setRowProperty(0, GridFieldManager.AUTO_SIZE, 0); 

VerticalFieldManager vfmLeft = new VerticalFieldManager(Manager.USE_ALL_WIDTH | Manager.USE_ALL_HEIGHT); 
vfmLeft.setBackground(BackgroundFactory.createSolidBackground(Color.CYAN)); 
gridFieldManager.add(vfmLeft); 

VerticalFieldManager vfmRight = new VerticalFieldManager(Manager.USE_ALL_WIDTH | Manager.USE_ALL_HEIGHT); 
vfmRight.setBackground(BackgroundFactory.createSolidBackground(Color.GRAY)); 
gridFieldManager.add(vfmRight); 

add(gridFieldManager);  

产生两列大小相等的列。