user-interface - 黑莓 - 在屏幕上设置字段位置？

Question

我想将我的领域定位在指定的位置。

Answer 1

基本上设置任何 经理之间的现场位置，你应该:

覆盖 sublayout

套装 layoutChild 每个经理领域

套装setPositionChild 每个经理领域

使用 setExtend正确调整尺寸管理器

删除了无效的 ImageShack 链接

扩展经理代码:

class CustomVerticalManager extends VerticalFieldManager {
 LabelField mText1 = new LabelField("top");
 LabelField mText2 = new LabelField("bottom");

 public CustomVerticalManager() {
  add(mText1);
  add(mText2);
 }

 public int getPreferredHeight() {
  return Display.getHeight();
 }

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

 protected void sublayout(int width, int height) {
  width = getPreferredWidth();
  height = getPreferredHeight();

  int fieldWidth = mText1.getPreferredWidth();
  int fieldHeight = mText1.getPreferredHeight();
  layoutChild(mText1, fieldWidth, fieldHeight);
  int xPos = (width - fieldWidth) >> 1;
  int yPos = 0;
  setPositionChild(mText1, xPos, yPos);

  fieldWidth = mText2.getPreferredWidth();
  fieldHeight = mText2.getPreferredHeight();
  layoutChild(mText2, fieldWidth, fieldHeight);
  xPos = (width - fieldWidth) >> 1;
  yPos = height - fieldHeight;
  setPositionChild(mText2, xPos, yPos);
  setExtent(width, height);
 }
}

使用示例:

class Scr extends MainScreen {
 CustomVerticalManager mManager = new CustomVerticalManager();

 public Scr() {
  add(mManager);
 }
}

也可以看看
Wireless - How to : Create a custom layout manager for a screen
Blackberry - fields layout animation