java-Android：NPE,同时尝试使用ACTION_APPWIDGET_PICK意向activityForResult

概述我有一个问题,然后尝试使用AppWidgetManager.ACTION_APPWIDGET_PICK表示意图,从日志中可以看到androidAppWidget生态系统内部存在一些问题.这样我做错了吗？请参阅下面的示例代码和堆栈跟踪publicclassNPEDemoActivityextendsActivity{privatefinalstaticintHOST_

我有一个问题,然后尝试使用AppWidgetManager.ACTION_APPWidget_PICK表示意图,从日志中可以看到android AppWidget生态系统内部存在一些问题.
这样我做错了吗？
请参阅下面的示例代码和堆栈跟踪

public class NPEDemoActivity extends Activity {    private final static int HOST_CODE = 1024;    private AppWidgetHost host;    private AppWidgetManager manager;    private int PICK_Widget_RC = 1;    @OverrIDe    public voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                setContentVIEw(R.layout.main);        host = new AppWidgetHost(this, HOST_CODE);        host.startListening();        manager = AppWidgetManager.getInstance(this);        button b = (button)findVIEwByID(R.ID.button01);        b.setonClickListener(new VIEw.OnClickListener() {            @OverrIDe            public voID onClick(VIEw v) {                int nextID = host.allocateAppWidgetID();                Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWidget_PICK);                             pickIntent.putExtra(AppWidgetManager.EXTRA_APPWidget_ID, nextID);                startActivityForResult(pickIntent, PICK_Widget_RC);               }        });    }    @OverrIDe    protected voID onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);    }}

日志猫的堆栈跟踪：

10-15 17:33:06.873: ERROR/AndroIDRuntime(821): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androID.settings/com.androID.settings.AppWidgetPickActivity}: java.lang.NullPointerException10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at androID.app.ActivityThread.performlaunchActivity(ActivityThread.java:2401)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at androID.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2417)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at androID.app.ActivityThread.access00(ActivityThread.java:116)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at androID.app.ActivityThread$H.handleMessage(ActivityThread.java:1794)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at androID.os.Handler.dispatchMessage(Handler.java:99)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at androID.os.Looper.loop(Looper.java:123)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at androID.app.ActivityThread.main(ActivityThread.java:4203)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at java.lang.reflect.Method.invokeNative(Native Method)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at java.lang.reflect.Method.invoke(Method.java:521)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:549)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at dalvik.system.NativeStart.main(Native Method)10-15 17:33:06.873: ERROR/AndroIDRuntime(821): Caused by: java.lang.NullPointerException10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at com.androID.settings.AppWidgetPickActivity.putAppWidgetItems(AppWidgetPickActivity.java:170)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at com.androID.settings.AppWidgetPickActivity.putCustomAppWidgets(AppWidgetPickActivity.java:132)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at com.androID.settings.AppWidgetPickActivity.getItems(AppWidgetPickActivity.java:208)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at com.androID.settings.ActivityPicker.onCreate(ActivityPicker.java:99)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at com.androID.settings.AppWidgetPickActivity.onCreate(AppWidgetPickActivity.java:63)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at androID.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)10-15 17:33:06.873: ERROR/AndroIDRuntime(821):     at androID.app.ActivityThread.performlaunchActivity(ActivityThread.java:2364)

另一个小问题,com.androID.settings驻留在哪个androID项目中？ (我被windows卡住了,所以不能不幸使用回购)
帮助真的很感激.

解决方法:

看起来像是androID设置中的错误,如果您尝试在未指定任何其他小部件的情况下选择appWidget,将会失败,并在Google代码link中填充了一个问题

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