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Question

有没有办法在Showcase视图中设置Title和Message的位置？我看到库使用函数来找到最佳位置，但我想覆盖它。

Answer 1

我刚刚进入ShowcaseView源代码，似乎没有办法设置文本位置。所以我在库中添加了自己的修改。以下是我所做的更改：

在课程ShowcaseView中添加了以下字段：

private boolean hasManualPostion = false;
private int xPosition, yPosition, width;

然后在Builder类ShowcaseView类的内部类中，添加以下方法：

        public Builder hasManualPosition(boolean hasManualPosition) {
        showcaseView.hasManualPostion = hasManualPosition;
        return this;
    }

    public Builder xPostion(int xPostion) {
        showcaseView.xPosition = xPostion;
        return this;
    }

    public Builder yPostion(int yPostion) {
        showcaseView.yPosition = yPostion;
        return this;
    }

之后，将此方法添加到TextDrawer类：

public void setTestPostionManually(int xPosition, int yPosition) {
    mBestTextPosition[0] = xPosition;
    mBestTextPosition[1] = yPosition;
}

并在onPreDraw中更改ShowcaseView方法，如下所示：

    @Override
public boolean onPreDraw() {
    boolean recalculatedCling = showcaseAreaCalculator.calculateShowcaseRect(showcaseX, showcaseY, showcaseDrawer);
    boolean recalculateText = recalculatedCling || hasAlteredText;
    if (recalculateText) {
        textDrawer.calculateTextPosition(getMeasuredWidth(), getMeasuredHeight(), this, shouldCentreText);
        if (hasManualPostion) {
            textDrawer.setTestPostionManually(xPosition, yPosition);
        }
    }
    hasAlteredText = false;
    return true;
}

现在你应该像这样创建ShowcaseView：

sv = new ShowcaseView.Builder(this, true)
                .setTarget(target)
                .setContentTitle(R.string.showcase_main_title)
                .setContentText(R.string.showcase_main_message)
                .setStyle(R.style.CustomShowcaseTheme2)
                .setShowcaseEventListener(this)
                .hasManualPosition(true)
                .xPostion(0)
                .yPostion(240)
                .build();

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享受！