0

从这段代码中，

public class Custom_TopField extends Manager {
private Bitmap download = Config_GlobalFunction.Bitmap("btn_download.png");
private Bitmap downloadactive = Config_GlobalFunction
        .Bitmap("btn_download_active.png");
private Bitmap refresh = Config_GlobalFunction.Bitmap("icon_refresh.png");
private Bitmap refreshactive = Config_GlobalFunction
        .Bitmap("icon_refresh_active.png");
private Bitmap back = Config_GlobalFunction.Bitmap("btn_back.png");
private Bitmap backctive = Config_GlobalFunction
        .Bitmap("btn_back_active.png");
private Bitmap news = Config_GlobalFunction.Bitmap("icon_news.png");
private Bitmap newsactive = Config_GlobalFunction
        .Bitmap("icon_news_active.png");

private Custom_ButtonField downloadbtn, refreshbtn, backbtn, newsbtn;
private Custom_LabelField title;
private int left, right, fontsize;
private Database_Webservice webservice;

Custom_TopField(final MainScreen mainscreen, final int position,
        final int catsid, final String header, int left, int right) {
    super(Manager.USE_ALL_WIDTH | Manager.NO_VERTICAL_SCROLL
            | Manager.NO_HORIZONTAL_SCROLL);
    this.left = left;
    this.right = right;

    if (Display.getWidth() > 480)
        fontsize = 43;
    else if (Display.getWidth() < 481 && Display.getWidth() > 320)
        fontsize = 33;
    else
        fontsize = 23;

    webservice = new Database_Webservice();
    setBackground(Config_GlobalFunction.loadbackground(Display.getWidth()
            + "_" + "header_bar.png"));

    if (position != 0) {
        title = new Custom_LabelField(Config_GlobalFunction.maintitle,
                DrawStyle.ELLIPSIS | LabelField.USE_ALL_WIDTH
                        | DrawStyle.HCENTER | Field.FOCUSABLE, Color.WHITE) {
            protected boolean navigationClick(int status, int time) {
                Main.getUiApplication().pushScreen(
                        new Custom_LoadingScreen(1));
                Main.getUiApplication().invokeLater(new Runnable() {
                    public void run() {
                        Main.getUiApplication().pushScreen(
                                new Main_AllLatestNews(false));
                    }
                }, 1 * 1000, false);
                return true;
            }

            protected boolean touchEvent(TouchEvent message) {
                int eventCode = message.getEvent();
                if (eventCode == TouchEvent.UNCLICK)
                    Main.getUiApplication().pushScreen(
                            new Menu_PopupMenu(position));

                return true;
            }
        };

    } else {
        title = new Custom_LabelField(Config_GlobalFunction.maintitle,
                DrawStyle.ELLIPSIS | LabelField.USE_ALL_WIDTH
                        | DrawStyle.HCENTER, Color.WHITE);
    }
    title.setFont(Font.getDefault().derive(Font.BOLD, fontsize));
    add(title);

    if (left == 1) {
        newsbtn = new Custom_ButtonField(news, newsactive, newsactive) {
            protected boolean navigationClick(int status, int time) {
                Main.getUiApplication().pushScreen(
                        new Menu_PopupMenu(position));
                return true;
            }

            protected boolean touchEvent(TouchEvent message) {
                int eventCode = message.getEvent();
                if (eventCode == TouchEvent.UP)
                    Main.getUiApplication().pushScreen(
                            new Menu_PopupMenu(position));

                return true;
            }
        };

        add(newsbtn);
    } else if (left == 2) {
        backbtn = new Custom_ButtonField(back, backctive, backctive) {
            protected boolean navigationClick(int status, int time) {
                Main.getUiApplication().popScreen(mainscreen);
                return true;
            }

            protected boolean touchEvent(TouchEvent message) {
                int eventCode = message.getEvent();
                if (eventCode == TouchEvent.UP)
                    Main.getUiApplication().popScreen(mainscreen);
                return true;
            }
        };
        add(backbtn);
    }

    if (right == 1) {
        downloadbtn = new Custom_ButtonField(download, downloadactive,
                downloadactive) {
            protected boolean navigationClick(int status, int time) {
                if (Config_GlobalFunction
                        .Dialog(Config_GlobalFunction.alertdownload)) {
                    if (Config_GlobalFunction.isConnected()) {
                        webservice.UpdateAllCatNews();
                    } else
                        Config_GlobalFunction.Message(
                                Config_GlobalFunction.nowifi, 1);
                } else
                    Config_GlobalFunction.CloseDialog();
                return true;
            }

            protected boolean touchEvent(TouchEvent message) {
                int eventCode = message.getEvent();
                if (eventCode == TouchEvent.UP) {
                    if (Config_GlobalFunction
                            .Dialog(Config_GlobalFunction.alertdownload)) {
                        if (Config_GlobalFunction.isConnected()) {
                            webservice.UpdateAllCatNews();
                        } else
                            Config_GlobalFunction.Message(
                                    Config_GlobalFunction.nowifi, 1);
                    } else
                        Config_GlobalFunction.CloseDialog();
                }
                return true;
            }
        };
        add(downloadbtn);
    } else if (right == 2) {
        refreshbtn = new Custom_ButtonField(refresh, refreshactive,
                refreshactive) {
            protected boolean navigationClick(int status, int time) {
                if (Config_GlobalFunction.isConnected()) {
                    webservice
                            .refreshCatNewsindex(catsid, position, header);
                } else
                    Config_GlobalFunction.Message(
                            Config_GlobalFunction.nowifi, 1);
                return true;
            }

            protected boolean touchEvent(TouchEvent message) {
                int eventCode = message.getEvent();
                if (eventCode == TouchEvent.UP) {
                    if (Config_GlobalFunction.isConnected())
                        webservice.refreshCatNewsindex(catsid, position,
                                header);
                    else
                        Config_GlobalFunction.Message(
                                Config_GlobalFunction.nowifi, 1);
                }
                return true;
            }
        };
        add(refreshbtn);
    }
}
}

newsbtn左右各有一个按钮downloadbtn。在newsbtn对焦的时候，我点了downloadbtn，不提示Dialog但是会提示pushscreen。对了，如果我点击downloadbtn，它会提示Dialog而不是pushscreen。

当两个按钮都未聚焦时，我单击该按钮，该按钮正在聚焦并按预期执行。

我尝试聚焦默认按钮，即ButtonField，然后单击另一个字段，它正确执行。

我认为是custom_buttonfield阶级问题。

这是我的Custom_FieldButton。

public class Custom_ButtonField extends ButtonField {
Bitmap mNormal;
Bitmap mFocused;
Bitmap mActive;

int mWidth;
int mHeight;

private int color = -1;
String text;

public Custom_ButtonField(Bitmap normal, Bitmap focused, Bitmap active) {
    super(CONSUME_CLICK | Field.FOCUSABLE | Field.FIELD_HCENTER
            | Field.FIELD_VCENTER);
    mNormal = normal;
    mFocused = focused;
    mActive = active;
    mWidth = mNormal.getWidth();
    mHeight = mNormal.getHeight();
    setMargin(0, 0, 0, 0);
    setPadding(0, 0, 0, 0);
    setBorder(BorderFactory.createSimpleBorder(new XYEdges(0, 0, 0, 0)));
    setBorder(VISUAL_STATE_ACTIVE,
            BorderFactory.createSimpleBorder(new XYEdges(0, 0, 0, 0)));
}

public Custom_ButtonField(String text, Bitmap normal, Bitmap focused,
        Bitmap active, int color) {
    super(CONSUME_CLICK | Field.FOCUSABLE | Field.FIELD_HCENTER
            | Field.FIELD_VCENTER);
    this.color = color;
    mNormal = normal;
    mFocused = focused;
    mActive = active;
    mWidth = mNormal.getWidth();
    mHeight = mNormal.getHeight();
    setMargin(0, 0, 0, 0);
    setPadding(0, 0, 0, 0);
    setBorder(BorderFactory.createSimpleBorder(new XYEdges(0, 0, 0, 0)));
    setBorder(VISUAL_STATE_ACTIVE,
            BorderFactory.createSimpleBorder(new XYEdges(0, 0, 0, 0)));
    this.text = text;
}

public Custom_ButtonField(String text, Bitmap normal, Bitmap focused,
        Bitmap active, int color, long style) {
    super(style);
    this.color = color;
    mNormal = normal;
    mFocused = focused;
    mActive = active;
    mWidth = mNormal.getWidth();
    mHeight = mNormal.getHeight();
    setMargin(0, 0, 0, 0);
    setPadding(0, 0, 0, 0);
    setBorder(BorderFactory.createSimpleBorder(new XYEdges(0, 0, 0, 0)));
    setBorder(VISUAL_STATE_ACTIVE,
            BorderFactory.createSimpleBorder(new XYEdges(0, 0, 0, 0)));
    this.text = text;
}

public void setText(String text) {
    this.text = text;
    invalidate();
}

public String getText() {
    return text;
}

public void setColor(int color) {
    this.color = color;
}

protected void onFocus(int direction) {
    super.onFocus(direction);
    color = 0x540604;
    this.invalidate();
}

protected void onUnfocus() {
    super.onUnfocus();
    color = Color.WHITE;
    this.invalidate();
}

protected void paint(Graphics graphics) {
    int fontcontent;
    if (Display.getWidth() > 480)
        fontcontent = 28;
    else if (Display.getWidth() < 481 && Display.getWidth() > 320)
        fontcontent = 23;
    else
        fontcontent = 18;

    Bitmap bitmap = null;
    switch (getVisualState()) {
    case VISUAL_STATE_NORMAL:
        bitmap = mNormal;
        break;
    case VISUAL_STATE_FOCUS:
        bitmap = mFocused;
        break;
    case VISUAL_STATE_ACTIVE:
        bitmap = mActive;
        break;
    default:
        bitmap = mNormal;
    }
    setBackground(BackgroundFactory.createBitmapBackground(bitmap));
    graphics.setFont(Font.getDefault().derive(Font.PLAIN, fontcontent));
    graphics.setColor(color);
    graphics.drawText(text, (mNormal.getWidth() - Font.getDefault()
            .getAdvance(text)) / 2, ((mNormal.getHeight() - Font
            .getDefault().getHeight()) / 2) + 10, DrawStyle.HCENTER
            | DrawStyle.VCENTER);
}

public int getPreferredWidth() {
    return mWidth;
}

public int getPreferredHeight() {
    return mHeight;
}

protected void layout(int width, int height) {
    setExtent(mWidth, mHeight);
}
}

谁能帮我编辑类让按钮的*焦点状态不会影响功能？*

4

2 回答 2

0

使用setFieldChangeListener将完成所有操作。

    if (position != 0) {
        title = new Custom_LabelField(Config_GlobalFunction.maintitle,
                DrawStyle.ELLIPSIS | LabelField.USE_ALL_WIDTH
                        | DrawStyle.HCENTER | Field.FOCUSABLE
                        | ButtonField.CONSUME_CLICK, Color.WHITE) {
            protected boolean navigationClick(int status, int time) {
                Main.getUiApplication().pushScreen(
                        new Custom_LoadingScreen(1));
                Main.getUiApplication().invokeLater(new Runnable() {
                    public void run() {
                        Main.getUiApplication().pushScreen(
                                new Main_AllLatestNews());
                    }
                }, 1 * 1000, false);
                return true;
            }
        };
    } else {
        title = new Custom_LabelField(Config_GlobalFunction.maintitle,
                DrawStyle.ELLIPSIS | LabelField.USE_ALL_WIDTH
                        | DrawStyle.HCENTER, Color.WHITE);
    }
    title.setFont(Font.getDefault().derive(Font.BOLD, fontsize));
    add(title);

    if (left == 1) {
        newsbtn = new Custom_ButtonField(news, newsactive, newsactive);
        newsbtn.setChangeListener(new FieldChangeListener() {
            public void fieldChanged(Field field, int context) {
                Main.getUiApplication().pushScreen(
                        new Menu_PopupMenu(position));
            }
        });
        add(newsbtn);
    } else if (left == 2) {
        backbtn = new Custom_ButtonField(back, backctive, backctive);
        backbtn.setChangeListener(new FieldChangeListener() {
            public void fieldChanged(Field field, int context) {
                Main.getUiApplication().popScreen(mainscreen);
            }
        });
        add(backbtn);
    }

    if (right == 1) {
        downloadbtn = new Custom_ButtonField(download, downloadactive,
                downloadactive);
        downloadbtn.setChangeListener(new FieldChangeListener() {
            public void fieldChanged(Field field, int context) {
                if (Config_GlobalFunction
                        .Dialog(Config_GlobalFunction.alertdownload)) {
                    if (Config_GlobalFunction.isConnected()) {
                        webservice.UpdateAllCatNews();
                    } else
                        Config_GlobalFunction.Message(
                                Config_GlobalFunction.nowifi, 1);
                } else
                    Config_GlobalFunction.CloseDialog();
            }
        });
        add(downloadbtn);
    } else if (right == 2) {
        refreshbtn = new Custom_ButtonField(refresh, refreshactive,
                refreshactive);
        refreshbtn.setChangeListener(new FieldChangeListener() {
            public void fieldChanged(Field field, int context) {
                if (Config_GlobalFunction.isConnected()) {
                    Config_GlobalFunction.Message(
                            Config_GlobalFunction.refreshing, 1);
                    webservice.UpdateMoreCatNews(catsid, position, header);
                } else
                    Config_GlobalFunction.Message(
                            Config_GlobalFunction.nowifi, 1);
            }
        });
        add(refreshbtn);
    }
}

但是，有一个不好的地方是当您单击或使用拨轮单击按钮时，它会显示为蓝色。

于 2012-07-26T07:47:45.857 回答
0

我知道您已经发布了答案，但我想建议另一种选择。尝试下载BlackBerry Advanced UI 示例。其中有很多有用的自定义Field类，几乎可以满足每个应用程序的需求。

更多信息在这里

您拥有的Custom_ButtonField类中还没有很多代码，所以我可能建议从Advanced UI Samples文件夹（在 下）中的BitmapButtonField类开始。/src/com/samples/toolkit/ui/component

如果您需要添加一些颜色绘制代码，看起来您已经对此感到满意了。

我认为关键是对于大多数Field子类，您可能不应该覆盖该touchEvent()方法。你可以，但它比大多数人想象的要棘手。这主要适用于复杂的字段，其中触摸的确切坐标很重要，或者您正在处理自定义滑动手势。

如果你根本不实现一个touchEvent()方法，navigationClick()或者中的代码navigationUnClick()可以用于你想要的。

但是，我认为你在正确的轨道上。通常，您将拥有一个可重用的按钮类（如BitmapButtonField），它不知道单击时要做什么。我通常让一个Manager类在单击按钮时注册 aFieldChangeListener做某事。这就是您将在高级 UI示例中看到的内容：

    BitmapButtonField one = new BitmapButtonField(
          Bitmap.getBitmapResource("button_back_normal.png"), 
          Bitmap.getBitmapResource("button_back_focus.png") );
    add(one);
    one.setChangeListener(new FieldChangeListener() {
        public void fieldChanged(Field f, int context) {
            Dialog.alert("Hello Button!");
        }
    });

已经正确设置以处理触摸点击和跟踪滚轮点击，而BitmapButtonField不会弄乱焦点状态。

尝试从那开始，看看这是否更好。祝你好运！

于 2012-07-27T09:43:12.027 回答