我已经搞砸了两天了，但似乎仍然无法弄清楚。
我终于在我的所有活动中看到了 tabhost，但是为了做到这一点，我必须创建一个片段活动。这弄乱了我的标签按钮的布局。当我使用选项卡活动时，它工作得很好，但现在，它看起来像这样：
我希望蓝色按钮占据整个栏。没有像现在这样的背景空间。不知道是布局问题还是缩放问题？这是我创建标签的代码，也是我调整标签大小的地方，以便中间的标签是外部标签的两倍：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
initialiseTabHost(savedInstanceState);
if (savedInstanceState != null) {
mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab")); //set the tab as per the saved state
}
// the following code is used to decrease the size of the two end tabs
Display display = getWindowManager().getDefaultDisplay();
int width = display.getWidth();
TabHost mth = (TabHost)findViewById(android.R.id.tabhost);
mth.getTabWidget()
.getChildAt(0)
.setLayoutParams(
new LinearLayout.LayoutParams(width / 4,
(int) (width / 4 * .625)));
mth.getTabWidget()
.getChildAt(1)
.setLayoutParams(
new LinearLayout.LayoutParams(width / 2,
(int) (width / 4 * .625)));
mth.getTabWidget()
.getChildAt(2)
.setLayoutParams(
new LinearLayout.LayoutParams(width / 4,
(int) (width / 4 * .625)));
}
/** (non-Javadoc)
* @see android.support.v4.app.FragmentActivity#onSaveInstanceState(android.os.Bundle)
*/
protected void onSaveInstanceState(Bundle outState) {
outState.putString("tab", mTabHost.getCurrentTabTag()); //save the tab selected
super.onSaveInstanceState(outState);
}
/**
* Initialise the Tab Host
*/
private void initialiseTabHost(Bundle args) {
mTabHost = (TabHost)findViewById(android.R.id.tabhost);
mTabHost.setup();
TabInfo tabInfo = null;
Resources res = getResources();
fragactivity.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab1").setIndicator("", res.getDrawable(R.drawable.tab_home)), ( tabInfo = new TabInfo("Tab1",ArrowsActivity.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
fragactivity.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab2").setIndicator("", res.getDrawable(R.drawable.tab_search)), ( tabInfo = new TabInfo("Tab2", OptionsActivity.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
fragactivity.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab3").setIndicator("", res.getDrawable(R.drawable.twitter)), ( tabInfo = new TabInfo("Tab3", ArrowsActivity.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
// Default to first tab
this.onTabChanged("Tab1");
//
mTabHost.setOnTabChangedListener(this);
}
/*
* @param activity
* @param tabHost
* @param tabSpec
* @param clss
* @param args
* */
private static void addTab(fragactivity activity, TabHost tabHost, TabHost.TabSpec tabSpec, TabInfo tabInfo) {
// Attach a Tab view factory to the spec
tabSpec.setContent(activity.new TabFactory(activity));
String tag = tabSpec.getTag();
// Check to see if we already have a fragment for this tab, probably
// from a previously saved state. If so, deactivate it, because our
// initial state is that a tab isn't shown.
tabInfo.fragment = activity.getSupportFragmentManager().findFragmentByTag(tag);
if (tabInfo.fragment != null && !tabInfo.fragment.isDetached()) {
FragmentTransaction ft = activity.getSupportFragmentManager().beginTransaction();
ft.detach(tabInfo.fragment);
ft.commit();
activity.getSupportFragmentManager().executePendingTransactions();
}
tabHost.addTab(tabSpec);
}
这是旧代码（当按钮大小正确时。）看起来视图正在通过另一个 .xml 文件传递，该文件指定图标应与父级匹配。我尝试在新代码中复制它，但我认为这对我来说有点太复杂了。这是与 .xml 一起使用的代码：
private void setTabs() {
// add tabs
addTab("Home", R.drawable.tab_home, ArrowsActivity.class);
addTab("Attendance", R.drawable.tab_search, OptionsActivity.class);
addTab("@PSUStrength", R.drawable.twitter, OptionsActivity.class);
// addTab("Contact Us", R.drawable.contact, OptionsActivity.class);
}
private void addTab(String labelId, int drawableId, Class<?> c) {
TabHost tabHost = getTabHost();
Intent intent = new Intent(this, c);
TabHost.TabSpec spec = tabHost.newTabSpec("tab" + labelId);
View tabIndicator = LayoutInflater.from(this).inflate(
R.layout.tab_indicator, getTabWidget(), false);
// TextView title = (TextView) tabIndicator.findViewById(R.id.title);
// title.setText(labelId);
ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
// registerForContextMenu(icon);
icon.setImageResource(drawableId);
spec.setIndicator(tabIndicator);
spec.setContent(intent);
tabHost.addTab(spec);
}
tab_indicator.xml：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="0dip"
android:layout_height="55dip"
android:layout_weight="1"
android:orientation="vertical">
<ImageView android:id="@+id/icon"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:src="@drawable/icon"
/>
</RelativeLayout>
我真的很感激这方面的一些帮助。谢谢。