我是android编程的新手。我正在尝试使用eclipse IDE在运行Windows Vista x64-Bit的计算机上创建一个4选项卡应用程序。在做了一些彻底的研究之后，我遇到了this教程，用于创建一个4选项卡应用程序。我仔细按照说明进行了修改，并在必要时对其进行了修改。
当我尝试在Android Gingerbread 2.3.3模拟器中启动它时，我不断被强制退出。我究竟做错了什么？欢迎所有建议。提前谢谢。
这是我的MainActivity.java代码（请记住，额外的导入是为了将来的目的）
package com.riverboys.riverbook_android;
import android.annotation.TargetApi;
import android.app.TabActivity;
import android.app.Activity;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Build;
import android.os.Bundle; // Makes an Android application an Android application
import android.os.StrictMode;
import android.support.v4.app.NavUtils;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button; // For Button element
import android.widget.TabHost; // For Tab element
import android.widget.TabHost.TabSpec;
//import android.widget.EditText; // For EditText element (to take text input)
import android.widget.TextView; // For TextView element
import com.riverboys.riverbook_android.CustomHttpClient;
import java.util.ArrayList;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class MainActivity extends TabActivity {
// Called when the activity is first created
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/* Show the Up button in the action bar.
setupActionBar();*/
Resources rsrcsRiverbook = getResources();
TabHost tbhstRiverbook = getTabHost();
// No need to call TabHost.Setup()
// First (Favorites) tab
Intent intntTab1 = new Intent().setClass(this, FavoritesActivity.class);
TabSpec tbspcTab1 = tbhstRiverbook
.newTabSpec("Favorites")
.setIndicator("Favorites", rsrcsRiverbook.getDrawable(R.drawable.icon_tab_favorites))
.setContent(intntTab1);
// Second (Search) tab
Intent intntTab2 = new Intent().setClass(this, SearchActivity.class);
TabSpec tbspcTab2 = tbhstRiverbook
.newTabSpec("Search")
.setIndicator("Search", rsrcsRiverbook.getDrawable(R.drawable.icon_tab_search))
.setContent(intntTab2);
// Third (Map) tab
Intent intntTab3 = new Intent().setClass(this, MapActivity.class);
TabSpec tbspcTab3 = tbhstRiverbook
.newTabSpec("Map")
.setIndicator("Map", rsrcsRiverbook.getDrawable(R.drawable.icon_tab_map))
.setContent(intntTab3);
// Fourth (River Log) tab
Intent intntTab4 = new Intent().setClass(this, RiverLogActivity.class);
TabSpec tbspcTab4 = tbhstRiverbook
.newTabSpec("River Log")
.setIndicator("River Log", rsrcsRiverbook.getDrawable(R.drawable.icon_tab_river_log))
.setContent(intntTab4);
//
tbhstRiverbook.addTab(tbspcTab1);
tbhstRiverbook.addTab(tbspcTab2);
tbhstRiverbook.addTab(tbspcTab3);
tbhstRiverbook.addTab(tbspcTab4);
// Set Favorites tab as default (zero based)
tbhstRiverbook.setCurrentTab(0);
}
}
这是我的activity_main.xml代码
<?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="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="0dp">
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="0dp" />
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom" />
</LinearLayout>
</TabHost>
4个标签的活动中的代码与以下内容相同
package com.riverboys.riverbook_android;
import android.annotation.TargetApi;
import android.app.TabActivity;
import android.app.Activity;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Build;
import android.os.Bundle; // Makes an Android application an Android application
import android.os.StrictMode;
import android.support.v4.app.NavUtils;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button; // For Button element
import android.widget.TabHost; // For Tab element
import android.widget.TabHost.TabSpec;
//import android.widget.EditText; // For EditText element (to take text input)
import android.widget.TextView; // For TextView element
import com.riverboys.riverbook_android.CustomHttpClient;
import java.util.ArrayList;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class FavoritesActivity extends Activity {
// Called when the activity is first created
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_favorites);
}
}
并且相应布局xml文件中的代码与以下内容相同
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".FavoritesActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
</RelativeLayout>
当应用程序尝试在模拟器中启动时，这是我在logcat中获得的错误信息
03-21 21:10:14.136: D/AndroidRuntime(338): Shutting down VM
03-21 21:10:14.136: W/dalvikvm(338): threadid=1: thread exiting with uncaught exception (group=0x40015560)
03-21 21:10:14.186: E/AndroidRuntime(338): FATAL EXCEPTION: main
03-21 21:10:14.186: E/AndroidRuntime(338): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.riverboys.riverbook_android/com.riverboys.riverbook_android.MainActivity}: android.content.res.Resources$NotFoundException: File res/drawable/icon_tab_favorites.xml from drawable resource ID #0x7f020005
03-21 21:10:14.186: E/AndroidRuntime(338): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.os.Handler.dispatchMessage(Handler.java:99)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.os.Looper.loop(Looper.java:123)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.app.ActivityThread.main(ActivityThread.java:3683)
03-21 21:10:14.186: E/AndroidRuntime(338): at java.lang.reflect.Method.invokeNative(Native Method)
03-21 21:10:14.186: E/AndroidRuntime(338): at java.lang.reflect.Method.invoke(Method.java:507)
03-21 21:10:14.186: E/AndroidRuntime(338): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
03-21 21:10:14.186: E/AndroidRuntime(338): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
03-21 21:10:14.186: E/AndroidRuntime(338): at dalvik.system.NativeStart.main(Native Method)
03-21 21:10:14.186: E/AndroidRuntime(338): Caused by: android.content.res.Resources$NotFoundException: File res/drawable/icon_tab_favorites.xml from drawable resource ID #0x7f020005
03-21 21:10:14.186: E/AndroidRuntime(338): at android.content.res.Resources.loadDrawable(Resources.java:1697)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.content.res.Resources.getDrawable(Resources.java:581)
03-21 21:10:14.186: E/AndroidRuntime(338): at com.riverboys.riverbook_android.MainActivity.onCreate(MainActivity.java:47)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
03-21 21:10:14.186: E/AndroidRuntime(338): ... 11 more
03-21 21:10:14.186: E/AndroidRuntime(338): Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #4: <item> tag requires a 'duration' attribute
03-21 21:10:14.186: E/AndroidRuntime(338): at android.graphics.drawable.AnimationDrawable.inflate(AnimationDrawable.java:256)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:787)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.graphics.drawable.Drawable.createFromXml(Drawable.java:728)
03-21 21:10:14.186: E/AndroidRuntime(338): at android.content.res.Resources.loadDrawable(Resources.java:1694)
03-21 21:10:14.186: E/AndroidRuntime(338): ... 15 more
03-21 21:10:18.925: I/Process(338): Sending signal. PID: 338 SIG: 9
03-21 21:10:22.785: D/AndroidRuntime(349): Shutting down VM
03-21 21:10:22.785: W/dalvikvm(349): threadid=1: thread exiting with uncaught exception (group=0x40015560)
03-21 21:10:22.815: E/AndroidRuntime(349): FATAL EXCEPTION: main
03-21 21:10:22.815: E/AndroidRuntime(349): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.riverboys.riverbook_android/com.riverboys.riverbook_android.MainActivity}: android.content.res.Resources$NotFoundException: File res/drawable/icon_tab_favorites.xml from drawable resource ID #0x7f020005
03-21 21:10:22.815: E/AndroidRuntime(349): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.os.Handler.dispatchMessage(Handler.java:99)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.os.Looper.loop(Looper.java:123)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.app.ActivityThread.main(ActivityThread.java:3683)
03-21 21:10:22.815: E/AndroidRuntime(349): at java.lang.reflect.Method.invokeNative(Native Method)
03-21 21:10:22.815: E/AndroidRuntime(349): at java.lang.reflect.Method.invoke(Method.java:507)
03-21 21:10:22.815: E/AndroidRuntime(349): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
03-21 21:10:22.815: E/AndroidRuntime(349): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
03-21 21:10:22.815: E/AndroidRuntime(349): at dalvik.system.NativeStart.main(Native Method)
03-21 21:10:22.815: E/AndroidRuntime(349): Caused by: android.content.res.Resources$NotFoundException: File res/drawable/icon_tab_favorites.xml from drawable resource ID #0x7f020005
03-21 21:10:22.815: E/AndroidRuntime(349): at android.content.res.Resources.loadDrawable(Resources.java:1697)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.content.res.Resources.getDrawable(Resources.java:581)
03-21 21:10:22.815: E/AndroidRuntime(349): at com.riverboys.riverbook_android.MainActivity.onCreate(MainActivity.java:47)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
03-21 21:10:22.815: E/AndroidRuntime(349): ... 11 more
03-21 21:10:22.815: E/AndroidRuntime(349): Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #4: <item> tag requires a 'duration' attribute
03-21 21:10:22.815: E/AndroidRuntime(349): at android.graphics.drawable.AnimationDrawable.inflate(AnimationDrawable.java:256)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:787)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.graphics.drawable.Drawable.createFromXml(Drawable.java:728)
03-21 21:10:22.815: E/AndroidRuntime(349): at android.content.res.Resources.loadDrawable(Resources.java:1694)
03-21 21:10:22.815: E/AndroidRuntime(349): ... 15 more
03-21 21:10:25.485: I/Process(349): Sending signal. PID: 349 SIG: 9
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" >
<!-- When selected, you should use bg with grey -->
<item android:drawable="@drawable/ic_tab_favorites"
android:state_selected="true" />
<!-- When not selected, you should use bg with white -->
<item android:drawable="@drawable/ic_tab_favorites" />
</animation-list>
编辑：为了将来的目的，这里是正确的代码形式：）
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false" >
<!-- When selected, you should use bg with grey -->
<item android:drawable="@drawable/ic_tab_favorites"
android:state_selected="true"
android:duration="200" />
<!-- When not selected, you should use bg with white -->
<item android:drawable="@drawable/ic_tab_favorites"
android:duration="200" />
</animation-list>
答案 0 :(得分：3)
首先，您正在使用的编程方法 - TabActivity使用标签的活动 - 已被弃用超过两年。
其次，您的特定问题来自XML drawable res/drawable/icon_tab_favorites.xml，它格式不正确。您可以通过读取堆栈跟踪来判断，特别是最后两行“由...引起”：
03-21 21:10:14.186: E/AndroidRuntime(338): Caused by: android.content.res.Resources$NotFoundException: File res/drawable/icon_tab_favorites.xml from drawable resource ID #0x7f020005
03-21 21:10:14.186: E/AndroidRuntime(338): Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #4: <item> tag requires a 'duration' attribute
请编辑该文件以在第4行添加duration属性，并考虑检查该文件的其余部分是否存在任何类似问题。