在按照google的例子做HelloTabWidget时,运行HelloTabWidget程序异常停止,解决方法如下:
<activity android:name=".AlbumsActivity" android:label="@string/app_name"></activity> <activity android:name=".ArtistsActivity" android:label="@string/app_name"></activity> <activity android:name=".SongsActivity" android:label="@string/app_name"></activity>
2. 把AlbumsActivity,ArtistsActivity和SongsActivity分别放到三个java文件里,代码按照google说明就可以。
3. 添加相关图标,并建立ic_tab_albums.xml,ic_tab_artists.xml和ic_tab_songs.xml三个文件,按照google说明就可以。
同样下面附上源代码:
HelloTabWidget.java
package com.example.HelloTabWidget; import android.app.TabActivity; import android.content.Intent; import android.content.res.Resources; import android.os.Bundle; import android.widget.TabHost; public class HelloTabWidget extends TabActivity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Resources res = getResources(); // Resource object to get Drawables TabHost tabHost = getTabHost(); // The activity TabHost TabHost.TabSpec spec; // Resusable TabSpec for each tab Intent intent; // Reusable Intent for each tab // Create an Intent to launch an Activity for the tab (to be reused) intent = new Intent().setClass(this, ArtistsActivity.class); // Initialize a TabSpec for each tab and add it to the TabHost spec = tabHost.newTabSpec("artists").setIndicator("Artists", res.getDrawable(R.drawable.ic_tab_artists)) .setContent(intent); tabHost.addTab(spec); // Do the same for the other tabs intent = new Intent().setClass(this, AlbumsActivity.class); spec = tabHost.newTabSpec("albums").setIndicator("Albums", res.getDrawable(R.drawable.ic_tab_albums)) .setContent(intent); tabHost.addTab(spec); intent = new Intent().setClass(this, SongsActivity.class); spec = tabHost.newTabSpec("songs").setIndicator("Songs", res.getDrawable(R.drawable.ic_tab_songs)) .setContent(intent); tabHost.addTab(spec); tabHost.setCurrentTab(2); }}
AlbumsActivity.java(ArtistsActivity.java和SongsActivity.java照着改就行了)
package com.example.HelloTabWidget; import android.app.Activity; import android.os.Bundle; import android.widget.TextView; public class AlbumsActivity extends Activity { public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); TextView textview = new TextView(this); textview.setText("This is the Albums tab"); setContentView(textview); } }
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.HelloTabWidget" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="15" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <activity android:name=".HelloTabWidget" android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".AlbumsActivity" android:label="@string/app_name"></activity> <activity android:name=".ArtistsActivity" android:label="@string/app_name"></activity> <activity android:name=".SongsActivity" android:label="@string/app_name"></activity> </application> </manifest>
ic_tab_albums.xml(其它两个照着抄就可以了):
<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <!-- When selected, use grey --> <item android:drawable="@drawable/ic_tab_albums_grey" android:state_selected="true" /> <!-- When not selected, use white--> <item android:drawable="@drawable/ic_tab_albums_white" /> </selector>