Android java应用程序适用于一个版本但不适用于下一个版本

时间：2010-08-02 10:22:23

标签： java android android-manifest

我对android很新，实际上只是昨天才开始。我设法通过标签获得应用程序设置。它在2.2虚拟avd上工作正常（我认为它被称为）。但我的HTC版本是2.0.1 我发布了以下代码的片段以及调试信息。

Logcat显示以下错误

08-02 09:56:05.946: WARN/dalvikvm(414): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
08-02 09:56:05.956: ERROR/AndroidRuntime(414): Uncaught handler: thread main exiting due to uncaught exception
08-02 09:56:06.196: ERROR/AndroidRuntime(414): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.hyperActiveSolutions/org.hyperActiveSolutions.Organizer}: java.lang.NullPointerException
08-02 09:56:06.196: ERROR/AndroidRuntime(414):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2481)
08-02 09:56:06.196: ERROR/AndroidRuntime(414):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2497)

还有更多内容，但我认为这是相关的一点，其余的只是长堆栈跟踪。

我的Android清单文件看起来像这样

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="org.hyperActiveSolutions"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:label="@string/app_name"
                  android:theme="@android:style/Theme.NoTitleBar" android:name="Organizer">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    <activity android:name="Home" ></activity>
<activity android:name="Account"></activity>
<activity android:name="Agenda" ></activity>
<activity android:name="Lists" ></activity>
</application>

<uses-sdk android:minSdkVersion="6" android:targetSdkVersion="6"></uses-sdk>
</manifest>

正如您所看到的，最小sdk和目标已设置为我手机的版本。这是我的入门课程的开始。此代码段结尾的位置是其他3个标签，其添加方式与Home完全相同。

public class Organizer extends TabActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);     
        this.setContentView(R.layout.main);
        final TabHost tabHost = getTabHost();  // The activity TabHost

   // Create an Intent to launch an Activity for the tab (to be reused)


   // Initialize a TabSpec for each tab and add it to the TabHost
   tabHost.addTab(tabHost.newTabSpec("home").setIndicator("Home",
            getResources().getDrawable(R.drawable.home)).setContent(new Intent().setClass(this, Home.class)));

我所有的资源都存在，包括我用每个标签实例化的类。 我能想到的另一件可能是相关的是我的布局main.xml。 它是从android开发站点复制的，在其中一个教程中。

<?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:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <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" />
    </LinearLayout>
</TabHost>

正如我所说，它在版本2.2上工作正常，但在2.0.1上死亡，屏幕上显示的消息只是“管理器意外终止”....无论如何都是消息的一部分。

所以任何人都可以发现任何可能使它与2.0.1 SDK不兼容的内容。

提前致谢

完整堆栈跟踪

08-02 11:47:54.006: WARN/dalvikvm(2588): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
08-02 11:47:54.016: ERROR/AndroidRuntime(2588): Uncaught handler: thread main exiting due to uncaught exception
08-02 11:47:54.256: ERROR/AndroidRuntime(2588): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.organizer/com.organizer.Organizer}: java.lang.NullPointerException
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2481)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2497)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.app.ActivityThread.access$2200(ActivityThread.java:119)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1848)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.os.Looper.loop(Looper.java:123)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.app.ActivityThread.main(ActivityThread.java:4338)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at java.lang.reflect.Method.invokeNative(Native Method)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at java.lang.reflect.Method.invoke(Method.java:521)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at dalvik.system.NativeStart.main(Native Method)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588): Caused by: java.lang.NullPointerException
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.widget.TabWidget.onFocusChange(TabWidget.java:351)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.View.onFocusChanged(View.java:2622)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.View.handleFocusGainInternal(View.java:2445)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.ViewGroup.handleFocusGainInternal(ViewGroup.java:403)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.View.requestFocus(View.java:3562)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.ViewGroup.requestFocus(ViewGroup.java:975)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.ViewGroup.onRequestFocusInDescendants(ViewGroup.java:1020)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.ViewGroup.requestFocus(ViewGroup.java:976)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.ViewGroup.onRequestFocusInDescendants(ViewGroup.java:1020)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.ViewGroup.requestFocus(ViewGroup.java:979)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.ViewGroup.onRequestFocusInDescendants(ViewGroup.java:1020)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.ViewGroup.requestFocus(ViewGroup.java:976)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.ViewGroup.onRequestFocusInDescendants(ViewGroup.java:1020)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.ViewGroup.requestFocus(ViewGroup.java:979)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.View.requestFocus(View.java:3513)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.view.View.requestFocus(View.java:3491)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.widget.TabHost.setCurrentTab(TabHost.java:334)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.widget.TabHost.addTab(TabHost.java:213)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at com.organizer.Organizer.onCreate(Organizer.java:25)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2444)
08-02 11:47:54.256: ERROR/AndroidRuntime(2588):     ... 11 more
08-02 11:47:54.476: INFO/Process(62): Sending signal. PID: 2588 SIG: 3
08-02 11:47:54.476: INFO/dalvikvm(2588): threadid=7: reacting to signal 3
08-02 11:47:54.476: ERROR/dalvikvm(2588): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
08-02 11:48:01.446: INFO/dalvikvm(2588): Debugger has detached; object registry had 306 entries
08-02 11:48:02.466: DEBUG/ddm-heap(2588): Got feature list request

2 个答案:

答案 0 :(得分：2)

您使用什么sdk版本来构建项目？如果它高于6，你必须确保你没有使用在版本6之后添加的sdk的部分。我问，因为它接缝就像你已经从8（2.2）下降了目标版本

如果这没有帮助，也许您可​​以发布可能提供其他线索的完整堆栈跟踪。

答案 1 :(得分：1)

您没有包含Home类的代码;您是否不小心将Home的内容视图设为R.layout.main？我收到了这个确切的错误，这就是问题 - 我正在将标签的内容视图设置为包含TabWidget本身的内容视图

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