Android Java应用程序只能在一个版本上运行,而不能在下一个版本上运行

Android 2019-12-25

我对android很陌生,实际上是昨天才开始的.我设法获得带有标签的应用程序设置.它在2.2虚拟avd上运行良好(我认为这被称为).但是我的HTC版本是2.0.1
我在下面发布代码片段以及调试信息.

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,但我认为这是相关的,其余只是长堆栈跟踪.

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>

如您所见,最低sdk和目标已设置为我手机的版本.这是我入门课程的开始.在此代码段结束的下方,以与“主页”完全相同的方式添加了其他3个选项卡.

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,包括每个选项卡实例化的类.
我唯一想到的可能与之相关的是布局的main.xml.
在教程之一中,它是从android dev网站复制的.

<?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>

正如我所说的,它在2.2版上可以正常运行,但在2.0.1版上死了,并且屏幕上显示的消息只是“ Organizer意外终止”.

因此,任何人都可以发现我拥有的所有内容,使其与2.0.1 SDK不兼容.

提前致谢

全栈跟踪

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
最佳答案
您正在使用哪个SDK版本来构建项目？如果它高于6,则必须确保您没有使用版本6之后添加的sdk部分.我要问的是,因为它暗示着您已将目标版本从8(2.2)降低了

如果这样做没有帮助,也许您可​​以发布完整的堆栈跟踪信息,这可能会提供其他线索.

androidandroid

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