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[英]How to change ActionBar Tab bottom border and selected tab background?
[英]How to change the background of a Tab with XML?
我有一個帶有TabWidget的TabHost。 我想自定義選項卡的選定和未選定狀態。 我不確定如何將所有這些XML文件放在一起,以便可以使用自定義標簽?
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp">
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp" />
</LinearLayout>
</TabHost>
這是我的選擇器xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Active tab -->
<item android:state_selected="true" android:state_focused="false"
android:state_pressed="false" android:drawable="@drawable/tab_selected" />
<!-- Inactive tab -->
<item android:state_selected="false" android:state_focused="false"
android:state_pressed="false" android:drawable="@drawable/tab_deselected" />
<!-- Pressed tab -->
<item android:state_pressed="true" android:drawable="@android:color/transparent" />
<!-- Selected tab (using d-pad) -->
<item android:state_focused="true" android:state_selected="true"
android:state_pressed="false" android:drawable="@android:color/transparent" />
</selector>
這是選定狀態:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient android:startColor="#97150c" android:centerColor="#7F7F7F"
android:endColor="#b4190d" android:angle="-90" />
</shape>
這是未選中狀態:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient android:startColor="#acacac" android:centerColor="#7F7F7F"
android:endColor="#d7d7d7" android:angle="-90" />
</shape>
用代碼做起來最簡單。 只需遍歷選項卡,然后在每個選項卡上設置setBackgroundImage。
以下代碼將完成此操作,其中tw是TabWidget'
for (int i = 0; i < tw.getChildCount(); i++)
{
View v = tw.getChildAt(i);
v.setBackgroundDrawable(null);
v.setOnTouchListener(new OnTouchListener()
{
@Override
public boolean onTouch(View v, MotionEvent event)
{
// Change the icon and background colors
TabWidget tw = getTabWidget();
for (int i = 0; i < tw.getChildCount(); i++)
{
View vv = tw.getChildAt(i);
vv.setBackgroundDrawable(null);
vv.setId(0);
}
NonScalingBackgroundDrawable nsbd = new NonScalingBackgroundDrawable(getApplicationContext(), v, R.drawable.nav_highlight);
v.setBackgroundDrawable(nsbd);
v.setId(1);
return false;
}
});
}
}
'
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