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该应用程序有5个选项卡，第一个选项卡在其布局中只有一个TextView，其他选项与ListView具有相同的布局，但它在选项卡中只显示一个白色背景。tabhost的Tab（活动）什么也没有
这里，一些日志和代码：
控制台：
ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=tbf.tb.simulador1o1/.MainActivity }
ActivityManager: Warning: Activity not started, its current task has been brought to the front
的logcat：
11-24 18:13:11.211: D/dalvikvm(1790): GC_FOR_ALLOC freed 392K, 10% free 9501K/10476K, paused 97ms, total 121ms
11-24 18:13:11.341: D/dalvikvm(1790): GC_FOR_ALLOC freed 6863K, 68% free 3848K/11688K, paused 41ms, total 42ms
11-24 18:13:11.341: I/dalvikvm-heap(1790): Grow heap (frag case) to 4.559MB for 696976-byte allocation
11-24 18:13:11.471: D/dalvikvm(1790): GC_FOR_ALLOC freed <1K, 62% free 4528K/11688K, paused 119ms, total 119ms
11-24 18:13:11.551: D/dalvikvm(1790): GC_CONCURRENT freed 0K, 62% free 4528K/11688K, paused 16ms+17ms, total 87ms
11-24 18:13:11.672: D/dalvikvm(1790): GC_FOR_ALLOC freed <1K, 62% free 4528K/11688K, paused 46ms, total 46ms
11-24 18:13:11.672: I/dalvikvm-heap(1790): Grow heap (frag case) to 5.739MB for 1238176-byte allocation
11-24 18:13:11.751: D/dalvikvm(1790): GC_CONCURRENT freed 0K, 51% free 5737K/11688K, paused 10ms+16ms, total 81ms
11-24 18:13:11.921: D/dalvikvm(1790): GC_FOR_ALLOC freed 1032K, 52% free 5683K/11688K, paused 39ms, total 41ms
11-24 18:13:12.111: D/dalvikvm(1790): GC_FOR_ALLOC freed 352K, 47% free 6309K/11688K, paused 38ms, total 39ms
11-24 18:13:12.231: D/dalvikvm(1790): GC_FOR_ALLOC freed 352K, 41% free 6934K/11688K, paused 38ms, total 39ms
11-24 18:13:12.482: D/dalvikvm(1790): GC_FOR_ALLOC freed 352K, 33% free 7913K/11688K, paused 41ms, total 42ms
11-24 18:13:36.001: I/Choreographer(1790): Skipped 57 frames! The application may be doing too much work on its main thread.
MainActivity布局：
<?xml version="1.0" encoding="utf-8"?>
<TabHost
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"/>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="0"/>
<FrameLayout
android:id="@+id/realtabcontent"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
</LinearLayout>
</TabHost>
MainActivity类别：
public class MainActivity extends TabActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// TabHost tabHost = getTabHost();
TabHost tabHost = (TabHost)findViewById(android.R.id.tabhost);
// Setting tabs
TabSpec tab1Spec = tabHost.newTabSpec("shopping");
tab1Spec.setIndicator("", getResources().getDrawable(R.drawable.shopping_selector));
tab1Spec.setContent(new Intent(this, Tab_1.class));
TabSpec tab2Spec = tabHost.newTabSpec("combo");
tab2Spec.setIndicator("", getResources().getDrawable(R.drawable.combo_selector));
tab2Spec.setContent(new Intent(this, Tab_2.class));
TabSpec tab3Spec = tabHost.newTabSpec("sandwich");
tab3Spec.setIndicator("", getResources().getDrawable(R.drawable.sandwich_selector));
tab3Spec.setContent(new Intent(this, Tab_3.class));
TabSpec tab4Spec = tabHost.newTabSpec("dog_chip_natural");
tab4Spec.setIndicator("", getResources().getDrawable(R.drawable.dogchipnatural_selector));
tab4Spec.setContent(new Intent(this, Tab_4.class));
TabSpec tab5Spec = tabHost.newTabSpec("drink_acai_icecream");
tab5Spec.setIndicator("", getResources().getDrawable(R.drawable.drinkacaiicecream_selector));
tab5Spec.setContent(new Intent(this, Tab_5.class));
// Adding all TabSpec to TabHost
tabHost.addTab(tab1Spec);
tabHost.addTab(tab2Spec);
tabHost.addTab(tab3Spec);
tabHost.addTab(tab4Spec);
tabHost.addTab(tab5Spec);
}
}
Tab_2布局：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0" >
</ListView>
</LinearLayout>
Tab_2类：
public class Tab_2 extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tab);
// Create Parser for raw/list_combo_offer.xml
ItemParser itemParser = new ItemParser();
InputStream inputStream = getResources().openRawResource(
R.raw.list_tab2);
// Parse the inputstream
itemParser.parse(inputStream);
// Get items
List<Item> itemList = itemParser.getList();
// Create a customized ArrayAdapter
ItemArrayAdapter adapter = new ItemArrayAdapter(
this, //getApplicationContext(),
R.layout.item_list,
itemList);
ListView lv = (ListView) findViewById(android.R.id.list);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> a, View v, int position, long id)
{
Intent intent = new Intent(Tab_2.this, ItemActivity.class);
intent.putExtra("position", (int) position);
startActivity(intent);
}
});
}
}
AndroidManifest：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="tbf.tb.simulador1o1"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="13"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="tbf.tb.simulador1o1.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="tbf.tb.simulador1o1.Tab_1"
android:label="@string/tab_1"
android:parentActivityName="tbf.tb.simulador1o1.MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="tbf.tb.simulador1o1.MainActivity" />
</activity>
<activity
android:name="tbf.tb.simulador1o1.Tab_2"
android:label="@string/tab_2"
android:parentActivityName="tbf.tb.simulador1o1.MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="tbf.tb.simulador1o1.MainActivity" />
</activity>
<activity
android:name="tbf.tb.simulador1o1.Tab_3"
android:label="@string/tab_3"
android:parentActivityName="tbf.tb.simulador1o1.MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="tbf.tb.simulador1o1.MainActivity" />
</activity>
<activity
android:name="tbf.tb.simulador1o1.Tab_4"
android:label="@string/tab_4"
android:parentActivityName="tbf.tb.simulador1o1.MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="tbf.tb.simulador1o1.MainActivity" />
</activity>
<activity
android:name="tbf.tb.simulador1o1.Tab_5"
android:label="@string/tab_5"
android:parentActivityName="tbf.tb.simulador1o1.MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="tbf.tb.simulador1o1.MainActivity" />
</activity>
</application>
</manifest>