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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" > <TextView
android:layout_width="150px"
android:layout_height="50px"
android:gravity="center"
android:id="@+id/name"/> <TextView
android:layout_width="150px"
android:layout_height="50px"
android:gravity="center"
android:id="@+id/age"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="50px"
android:gravity="center"
android:id="@+id/money"/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" > <ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="@+id/listView" /></LinearLayout>
06-02 01:02:05.599: E/AndroidRuntime(17060): FATAL EXCEPTION: main
06-02 01:02:05.599: E/AndroidRuntime(17060): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.stu.sqlite/com.stu.sqlite.MainActivity}: java.lang.NullPointerException
06-02 01:02:05.599: E/AndroidRuntime(17060): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
06-02 01:02:05.599: E/AndroidRuntime(17060): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
06-02 01:02:05.599: E/AndroidRuntime(17060): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
06-02 01:02:05.599: E/AndroidRuntime(17060): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
06-02 01:02:05.599: E/AndroidRuntime(17060): at android.os.Handler.dispatchMessage(Handler.java:99)
06-02 01:02:05.599: E/AndroidRuntime(17060): at android.os.Looper.loop(Looper.java:123)
06-02 01:02:05.599: E/AndroidRuntime(17060): at android.app.ActivityThread.main(ActivityThread.java:4627)
06-02 01:02:05.599: E/AndroidRuntime(17060): at java.lang.reflect.Method.invokeNative(Native Method)
06-02 01:02:05.599: E/AndroidRuntime(17060): at java.lang.reflect.Method.invoke(Method.java:521)
06-02 01:02:05.599: E/AndroidRuntime(17060): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
06-02 01:02:05.599: E/AndroidRuntime(17060): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
06-02 01:02:05.599: E/AndroidRuntime(17060): at dalvik.system.NativeStart.main(Native Method)
06-02 01:02:05.599: E/AndroidRuntime(17060): Caused by: java.lang.NullPointerException
06-02 01:02:05.599: E/AndroidRuntime(17060): at com.stu.sqlite.MainActivity.show(MainActivity.java:49)
06-02 01:02:05.599: E/AndroidRuntime(17060): at com.stu.sqlite.MainActivity.onCreate(MainActivity.java:27)
06-02 01:02:05.599: E/AndroidRuntime(17060): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
06-02 01:02:05.599: E/AndroidRuntime(17060): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
06-02 01:02:05.599: E/AndroidRuntime(17060): ... 11 more
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/listView" />
</LinearLayout>
这里应该是
android:id="@+id/listView"