标签指示灯颜色

Question

如何在不使用图像的情况下设置选项卡窗口小部件的tabindicator颜色.

private TextView makeTabIndicator(String text, Context context) {
    int tabHeight = 44;
    //String tab_text_color = context.getString(R.string.fixed_tab_text_color);
    TextView tabView = new TextView(getContext());
    tabView.setBackgroundColor(Utils.getColor("#0a223a"));
    LayoutParams lp3 = new LayoutParams(LayoutParams.WRAP_CONTENT, CommonUtils.getDimension(tabHeight), 1);
    //lp3.setMargins(1, 0, 1, 0);
    tabView.setLayoutParams(lp3);
    tabView.setText(text);
    //tabView.setTextColor(Utils.getColor(tab_text_color));
    tabView.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL);

    ColorDrawable unselectedState = new ColorDrawable(Utils.getColor("2c8efd"));
    ColorDrawable selectedState = new ColorDrawable(Utils.getColor("00ffff"));
    ColorDrawable focusState = new ColorDrawable(Utils.getColor("ffffff"));
    ColorDrawable pressedState = new ColorDrawable(Utils.getColor(""));

    StateListDrawable sld = new StateListDrawable();

    sld.addState(new int[] { android.R.attr.state_selected }, selectedState);
    sld.addState(new int[] { android.R.attr.state_pressed }, pressedState);
    sld.addState(new int[] { android.R.attr.state_focused }, focusState);
    sld.addState(new int[] {}, unselectedState);

    tabView.setBackgroundDrawable(sld);
    tabView.setPadding(2, 0, 2, 0);
    return tabView;
}

这是为整个选项卡设置颜色.但是,我想仅为标签文本下面的行提供颜色,高度为5dp.请告诉我们如何实现这一目标.

Answer 1

您在选定选项卡底部看到的蓝线实际上是9-patch drawable.一组6个不同的9-patch drawable用于创建状态选择器drawable.此状态选择器drawable用作您使用的View的背景TabSpec.setIndicator(View).

以下状态组合在默认状态选择器drawable中得到解决:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Non focused states -->
<item android:state_focused="false" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/tab_unselected_holo" />
<item android:state_focused="false" android:state_selected="true"  android:state_pressed="false" android:drawable="@drawable/tab_selected_holo" />

<!-- Focused states -->
<item android:state_focused="true" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/tab_unselected_focused_holo" />
<item android:state_focused="true" android:state_selected="true"  android:state_pressed="false" android:drawable="@drawable/tab_selected_focused_holo" />

<!-- Pressed -->
<!--    Non focused states -->
<item android:state_focused="false" android:state_selected="false" android:state_pressed="true" android:drawable="@drawable/tab_unselected_pressed_holo" />
<item android:state_focused="false" android:state_selected="true"  android:state_pressed="true" android:drawable="@drawable/tab_selected_pressed_holo" />

<!--    Focused states -->
<item android:state_focused="true" android:state_selected="false" android:state_pressed="true" android:drawable="@drawable/tab_unselected_pressed_holo" />
<item android:state_focused="true" android:state_selected="true"  android:state_pressed="true" android:drawable="@drawable/tab_selected_pressed_holo" />

因此,如果要创建StateListDrawable,则应该解决所有这些状态组合.此外,ColorDrawables将使用指定的颜色填充整个选项卡.如果您只需要更改底部的蓝线,则需要自己创建9-patch drawables.

现在,转到:

[你的硬盘上的android sdk安装目录]> [sdk]> [平台]> [android-XX(XX> 11)]> [数据]> [res]> [drawable-hdpi]

tab_unselected_holo.9.png从上面的状态选择器中找到相应的drawable(例如,您将要查找的第一个drawable ).用图像编辑器打开它们(http://pixlr.com/editor/就可以了)并用您选择的颜色更改实心蓝色部分.将这些drawable保存在项目的res/drawable-hdpi文件夹中.用.9.png扩展命名它们时要小心.从上面的代码创建一个状态选择器,并将drawables更改为您创建的那些.将此状态选择器保存在res/drawable项目中.对于以下代码,我假设您将此命名为这个状态选择器my_tab_drawable.xml:

创建一个名为的xml布局文件tab_indicator.xml.我们将使用它来创建选项卡的视图:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tabsLayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/my_tab_drawable"   <<==== state-selector drawable
    android:gravity="center"
    android:orientation="vertical"
    android:padding="10dip" >

    <TextView
        android:id="@+id/tabsText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="15dip" />

</LinearLayout>

将您更改makeTabIndicator(String, Context)为:

private View makeTabIndicator(String text, Context context) {

    // Inflate the layout file we defined above
    View view = LayoutInflater.from(context).inflate(R.layout.tab_indicator, null);   

    TextView tv = (TextView) view.findViewById(R.id.tabsText);
    tv.setText(text);

    return view;

}

请注意,我们将返回View代替TextView.您将使用makeTabIndicator(String, Context):

mtTabSpec.setIndicator(makeTabIndicator("TAB TEXT", this));

或者,如果要动态创建TextView(正如您当前所做的那样),则无需创建my_tab_drawable.xml或定义布局tab_indicator.xml:

private TextView makeTabIndicator(String text, Context context) {
    int tabHeight = 44;
    //String tab_text_color = context.getString(R.string.fixed_tab_text_color);
    TextView tabView = new TextView(getContext());
    //tabView.setBackgroundColor(Utils.getColor("#0a223a"));
    LayoutParams lp3 = new LayoutParams(LayoutParams.WRAP_CONTENT, CommonUtils.getDimension(tabHeight), 1);
    //lp3.setMargins(1, 0, 1, 0);
    tabView.setLayoutParams(lp3);
    tabView.setText(text);
    //tabView.setTextColor(Utils.getColor(tab_text_color));
    tabView.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL);

    StateListDrawable sld = new StateListDrawable();

    sld.addState(new int[] { android.R.attr.state_selected }, context.getResources().getDrawable(R.drawable.tab_selected_holo_changed));

    sld.addState(new int[] { android.R.attr.state_focused }, context.getResources().getDrawable(R.drawable.tab_unselected_focused_holo_changed));

    sld.addState(new int[] { android.R.attr.state_focused, android.R.attr.state_selected }, 
            context.getResources().getDrawable(R.drawable.tab_selected_focused_holo_changed));

    sld.addState(new int[] { android.R.attr.state_pressed },
            context.getResources().getDrawable(R.drawable.tab_unselected_pressed_holo_changed));

    sld.addState(new int[] { android.R.attr.state_selected, android.R.attr.state_pressed },
            context.getResources().getDrawable(R.drawable.tab_selected_pressed_holo_changed));

    sld.addState(new int[] { android.R.attr.state_focused, android.R.attr.state_pressed },
            context.getResources().getDrawable(R.drawable.tab_unselected_pressed_holo_changed));

    sld.addState(new int[] { android.R.attr.state_focused, android.R.attr.state_pressed, android.R.attr.state_selected },
            context.getResources().getDrawable(R.drawable.tab_selected_pressed_holo_changed));

    tabView.setBackgroundDrawable(sld);

    // Consider increasing the padding values
    tabView.setPadding(2, 0, 2, 0);
    return tabView;
}

您仍然需要创建9-patch drawable.

如果您需要帮助准备/更换9-patch drawables,请告诉我.