blackberry - 黑莓中 ListFieldItem 的垂直渐变

Question

我想在 BlackBerry 中显示一个垂直渐变作为 ListField Row 的背景。我已经使用 shadedFillPath 函数来实现这一点，但失败了：

int[] cols = new int[]{0xFFFFFF, 0xEEEEEE,0xEEEEEE,0XDDDDDD };
int[] xInds = new int[]{0, Display.getWidth(), Display.getWidth(), 0};
int[] yInds = new int[]{focusRect.y, focusRect.y,    
this.getRowHeight()+focusRect.y,this.getRowHeight()+focusRect.y};
graphics.drawShadedFilledPath(xInds, yInds,null, cols, null);

Answer 1

尝试这个

        int[] X_PTS = { 0, getPreferredWidth(),getPreferredWidth(),0};        
        int[] Y_PTS = { 0,0, getPreferredHeight(),getPreferredHeight()};        
        int[] drawColors = { Colors.CategoryFocusGradientStart, Colors.CategoryFocusGradientStart,
                             Colors.CategoryFocusGradientEnd, Colors.CategoryFocusGradientEnd };        
        try {            
            g.drawShadedFilledPath(X_PTS, Y_PTS, null, drawColors, null);        
        } catch (IllegalArgumentException e) {
            Log.Error(e,this,"Bad arguments.");
        }

Answer 2

它不是@rfsk2010 的答案，而是几乎（你必须为 y 更改那个 0）：

进入：

public void drawListRow(ListField listField, Graphics graphics,int index, int y, int width)

做这个：

int[] X_PTS = { 0, getPreferredWidth(),getPreferredWidth(),0};        
int[] Y_PTS = { y, y, getPreferredHeight(),getPreferredHeight()};        
int[] drawColors = { Colors.CategoryFocusGradientStart, Colors.CategoryFocusGradientStart,
                     Colors.CategoryFocusGradientEnd, Colors.CategoryFocusGradientEnd };        
try {            
    graphics.drawShadedFilledPath(X_PTS, Y_PTS, null, drawColors, null);        
} catch (IllegalArgumentException e) {
    Log.Error(e,this,"Bad arguments.");
}