10-13 02:04:28.981: ERROR/AndroidRuntime(452): FATAL EXCEPTION: main
10-13 02:04:28.981: ERROR/AndroidRuntime(452): java.lang.RuntimeException: Unable to start activity ComponentInfo{zm.Map01/zm.Map01.Map01Activity}: java.lang.NullPointerException
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.os.Handler.dispatchMessage(Handler.java:99)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.os.Looper.loop(Looper.java:123)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread.main(ActivityThread.java:4627)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at java.lang.reflect.Method.invokeNative(Native Method)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at java.lang.reflect.Method.invoke(Method.java:521)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at dalvik.system.NativeStart.main(Native Method)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): Caused by: java.lang.NullPointerException
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at com.google.android.maps.ItemizedOverlay.populate(ItemizedOverlay.java:312)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at zm.Map01.FirstOverlay.addOverlay(FirstOverlay.java:45)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at zm.Map01.Map01Activity.onCreate(Map01Activity.java:56)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): ... 11 more
哪出了问题呢?求解。我只看出了是空指针异常,不知道怎么解决
10-13 02:04:28.981: ERROR/AndroidRuntime(452): java.lang.RuntimeException: Unable to start activity ComponentInfo{zm.Map01/zm.Map01.Map01Activity}: java.lang.NullPointerException
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.os.Handler.dispatchMessage(Handler.java:99)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.os.Looper.loop(Looper.java:123)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread.main(ActivityThread.java:4627)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at java.lang.reflect.Method.invokeNative(Native Method)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at java.lang.reflect.Method.invoke(Method.java:521)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at dalvik.system.NativeStart.main(Native Method)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): Caused by: java.lang.NullPointerException
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at com.google.android.maps.ItemizedOverlay.populate(ItemizedOverlay.java:312)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at zm.Map01.FirstOverlay.addOverlay(FirstOverlay.java:45)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at zm.Map01.Map01Activity.onCreate(Map01Activity.java:56)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): ... 11 more
哪出了问题呢?求解。我只看出了是空指针异常,不知道怎么解决
解决方案 »
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10-13 02:04:28.981: ERROR/AndroidRuntime(452): at zm.Map01.Map01Activity.onCreate(Map01Activity.java:56)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at com.google.android.maps.ItemizedOverlay.populate(ItemizedOverlay.java:312)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at zm.Map01.FirstOverlay.addOverlay(FirstOverlay.java:45)
10-13 02:04:28.981: ERROR/AndroidRuntime(452): at zm.Map01.Map01Activity.onCreate(Map01Activity.java:56)
分别双击这几行,看能不能出现错误定位