Android API级别< 4上缺少TabSpec.setIndicator(View view)的解决方法 [英] Workaround for the absence TabSpec.setIndicator(View view) on Android API level <4

问题描述

我需要将自定义视图用于TabHost的指示器.在Android API级别> = 4的情况下没有问题，但是在Android API级别< 4的情况下，不会实现此方法.有什么建议吗?

I need to use my custom view for the indicators of my TabHost. With Android API level >=4 no problem but in the Android API level <4 this method is not implemented. Any suggestion?

我当时正在考虑实现此方法，但是不幸的是TabHost类不允许更改，因为它具有所有属性均为私有属性且未受保护.

I was thinking to implement this method but unfortunately the TabHost class does not allow changes because has all attributes private and not protected.

谢谢.

推荐答案

我建议使用反射:

private void setIndecator(TabHost.TabSpec tabSpec, String label) {
    LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    LinearLayout tabView = (LinearLayout) vi.inflate(R.layout.tab_view, null);
    ((TextView)tabView.findViewById(R.id.tabCaption)).setText(label);
    try {
        Method m = tabSpec.getClass().getMethod("setIndicator", View.class);
        m.invoke(tabSpec, tabView);
    } catch (Exception e) {
        //in case if platform 1.5 or via other problems indicator cannot be set as view
        //we have to set as just simple label.
        tabSpec.setIndicator(label, getResources().getDrawable(R.layout.tab_selector));
    }
}

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