如果当前按钮正在聚焦，则无法执行另一个按钮的功能

Question

从此代码中

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);
    }
}
}

左侧有一个按钮newsbtn，右侧有一个downloadbtn。当newsbtn重点关注时，我点击downloadbtn，它不会提示Dialog，但它会pushscreen。如果我点击downloadbtn，它会提示Dialog而不是pushscreen。

当两个按钮都不聚焦时，我点击按钮，按钮正在聚焦并执行预期。

我尝试对焦默认按钮ButtonField，然后点击另一个字段，它正确执行。

我认为是custom_buttonfield类问题。

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);
}
}

谁可以帮我编辑课程，以便按钮的* 焦点状态 不会影响该功能？ *

Answer 1

使用setFieldChangeListener将执行所有操作。

    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);
    }
}

然而，当您点击或使用拨轮单击按钮时，会出现一个不好的事情，它会显示为蓝色。

Answer 2

我知道你已经发布了答案，但我想提出另一种选择。尝试下载BlackBerry Advanced UI Samples。在许多有用的自定义Field类中，几乎每个应用程序都需要这些类。

More information here

您拥有的Custom_ButtonField课程中还没有很多代码，因此我建议您从高级用户界面示例中的BitmapButtonField课程开始文件夹（在/src/com/samples/toolkit/ui/component下）。

如果你需要添加一些颜色绘画代码，看起来你已经习惯了。

我认为关键是对于大多数Field子类，您可能不应该覆盖 touchEvent()方法。你可以，但它比大多数人想象的要复杂。这对于复杂的字段非常有用，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。

如果您根本没有实施touchEvent()方法，navigationClick()或navigationUnClick()中的代码可用于您想要的内容。

但是，我认为你走在了正确的轨道上。通常，您将拥有一个可重复使用的按钮类（如BitmapButtonField），该按钮类在单击时不知道该怎么做。我通常让Manager类注册FieldChangeListener来点击按钮时执行某些操作。这就是您在高级用户界面示例中看到的内容：

    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!");
        }
    });

BitmapButtonField已经正确设置，可以处理触摸点击，也可以跟踪滚轮点击，而不会弄乱焦点状态。

尝试从那开始，看看这是否更好。祝你好运！