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我在解析来自 am url 的内容时遇到异常。我得到的例外如下。

10-16 12:46:59.373: E/AndroidRuntime(4362): FATAL EXCEPTION: Thread-12
10-16 12:46:59.373: E/AndroidRuntime(4362): java.lang.NullPointerException
10-16 12:46:59.373: E/AndroidRuntime(4362):     at com.android.gyan.SearchResults$4.run(SearchResults.java:162)
10-16 12:46:59.373: E/AndroidRuntime(4362):     at java.lang.Thread.run(Thread.java:1019)
10-16 12:46:59.783: E/WindowManager(4362): Activity com.android.gyan.SearchResults has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4056d3b0 that was originally added here
10-16 12:46:59.783: E/WindowManager(4362): android.view.WindowLeaked: Activity com.android.gyan.SearchResults has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4056d3b0 that was originally added here
10-16 12:46:59.783: E/WindowManager(4362):  at android.view.ViewRoot.<init>(ViewRoot.java:258)
10-16 12:46:59.783: E/WindowManager(4362):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
10-16 12:46:59.783: E/WindowManager(4362):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
10-16 12:46:59.783: E/WindowManager(4362):  at android.view.Window$LocalWindowManager.addView(Window.java:424)
10-16 12:46:59.783: E/WindowManager(4362):  at android.app.Dialog.show(Dialog.java:241)
10-16 12:46:59.783: E/WindowManager(4362):  at android.app.ProgressDialog.show(ProgressDialog.java:107)
10-16 12:46:59.783: E/WindowManager(4362):  at android.app.ProgressDialog.show(ProgressDialog.java:95)
10-16 12:46:59.783: E/WindowManager(4362):  at com.android.gyan.SearchResults.ParsingCall(SearchResults.java:147)
10-16 12:46:59.783: E/WindowManager(4362):  at com.android.gyan.SearchResults.onCreate(SearchResults.java:137)
10-16 12:46:59.783: E/WindowManager(4362):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-16 12:46:59.783: E/WindowManager(4362):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
10-16 12:46:59.783: E/WindowManager(4362):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
10-16 12:46:59.783: E/WindowManager(4362):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
10-16 12:46:59.783: E/WindowManager(4362):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
10-16 12:46:59.783: E/WindowManager(4362):  at android.os.Handler.dispatchMessage(Handler.java:99)
10-16 12:46:59.783: E/WindowManager(4362):  at android.os.Looper.loop(Looper.java:130)
10-16 12:46:59.783: E/WindowManager(4362):  at android.app.ActivityThread.main(ActivityThread.java:3683)
10-16 12:46:59.783: E/WindowManager(4362):  at java.lang.reflect.Method.invokeNative(Native Method)
10-16 12:46:59.783: E/WindowManager(4362):  at java.lang.reflect.Method.invoke(Method.java:507)
10-16 12:46:59.783: E/WindowManager(4362):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-16 12:46:59.783: E/WindowManager(4362):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-16 12:46:59.783: E/WindowManager(4362):  at dalvik.system.NativeStart.main(Native Method)

我用来解析的是这个。

public void ParsingCall(final String urlFirst) {
    final Bundle b = new Bundle();
    progressDialog = ProgressDialog.show(SearchResults.this, " ",
            "Searching.....", true, false);
    progressDialog.setIcon(-1);

    progressDialog.setIcon(R.drawable.logo);
    new Thread(new Runnable() {

        public void run() {
            LyricsData dataContent = null;

            dataContent = LyricsParse.Parse(urlFirst);
            Message msg = new Message();
            {

                {
                    if(dataContent.contentList != null) {
                        b.putStringArrayList("contentList",
                            dataContent.contentList);
                    }else {
                        //dataContent.contentList[0] = {"No value"};
                        b.putString("contentList",
                                "No value");
                    }
                    if(dataContent.optionNameArrayList != null)
                    b.putStringArrayList("optionNameArrayList",
                            dataContent.optionNameArrayList);
                    else
                        b.putString("optionNameArrayList",
                                "No value");
                }
            }

            msg.setData(b);

            handler.sendMessage(msg);

        }
    }).start();
}

我还编写了一个处理程序，它将获取消息并从中获取数据并将这些设置为我在活动中拥有的视图。请注意，并非每次都会出现此异常。它变得非常罕见。

4

3 回答 3

2

您的运行方法中有错误。将调试点放在运行方法的开始处，您将得到一个初始化为 NULL 的变量。

于 2012-10-16T12:04:25.950 回答
0

删除一行..

progressDialog.setIcon(-1);

progressDialog.setIcon(R.drawable.logo);
于 2012-10-16T07:45:33.173 回答
0

根据这一行，您将获得文件的NullPointerException第 147SearchResults.java行：

10-16 12:46:59.783: E/WindowManager(4362):  at com.android.gyan.SearchResults.ParsingCall(SearchResults.java:147)

请确保此行上的所有变量都已初始化且未设置为 null。我猜你正在打电话ProgressDialog.show()，但你还没有初始化你的ProgressDialog变量或者你的初始化超出了范围。

于 2012-10-16T07:49:03.593 回答