Question

我为自己的应用编写了一个AppWidget，您可以选择自己喜欢的地方名称，并向您显示该地点的图片。

它有一个配置Activity（我使用了与app本身相同的配置活动）当第一次添加时，小部件和它的配置handeling工作正常：我选择一个我喜欢的地方，我看到了图片;

问题是每当我重启设备（或者它是否退出睡眠模式）然后，当我点击它（小部件）时，我进入配置活动 - 更改为所需的图片，没有任何反应当我调试时，我可以看到：

appWidgetManager.updateAppWidget(mAppWidgetId, views);
mAppWidgetId =

有id，views不是null。黑客正在发生什么？我的想法是，在重新启动设备时，widgetId会发生变化，并且我不会像我应该那样处理它。 BTW如果在模拟器上尝试相同我没有问题一切正常

这是我的代码：

的Manifest.xml：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.test.dryrun" android:versionCode="3"
    android:versionName="1.1" android:installLocation="auto">
    <uses-sdk android:minSdkVersion="8" />

    <application android:icon="@drawable/ic_launcher_test"
        android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
        android:debuggable="true"><!-- different< android:theme="@style/Theme.NoBackground" -->

        <!-- Main Activity -->
        <activity android:name=".MyActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <!-- Preferences -->

        <activity android:name=".Preferences.EditPreferences">
             <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE"/>
        </activity>

        <!-- Widgets -->

        <!--  Widget-->
        <receiver android:name=".Widget.testWidget" android:label="@string/app_widget_">
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
                <!--action
                    android:name="com.test.dryrun.Widget.testWidget.PREFENCES_WIDGET_CONFIGURE" /-->
            </intent-filter>
            <meta-data android:name="android.appwidget.provider"
                android:resource="@xml/test_widget__provider" />
        </receiver>
        <service android:name=".Widget.testWidget$WidgetService" />

        <uses-permission android:name="android.permission.BIND_REMOTEVIEWS"></uses-permission>
    </application>
</manifest>

appwidget_provider xml

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
 android:minWidth="146dip"
 android:minHeight="146dip"
 android:updatePeriodMillis="0"
 android:initialLayout="@layout/test_widget"
/>

小工具类

public class testWidget extends AppWidgetProvider {
    public static String PREFENCES_WIDGET_CONFIGURE = "ActionConfigureWidget";

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        Intent svcIntent = new Intent(context, WidgetService.class);
        widgets = appWidgetIds;
        context.startService(svcIntent);
    }


  @Override
  public void onReceive(Context context, Intent intent) 
  {

        // v1.5 fix that doesn't call onDelete Action
        final String action = intent.getAction();
        if (AppWidgetManager.ACTION_APPWIDGET_DELETED.equals(action))
        {
            final int appWidgetId = intent.getExtras().getInt(
                    AppWidgetManager.EXTRA_APPWIDGET_ID,
                    AppWidgetManager.INVALID_APPWIDGET_ID);
            if (appWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID)
            {
                this.onDeleted(context, new int[] { appWidgetId });
            }
        }
        else
        {
            super.onReceive(context, intent);           
        }
    }

    //public void updateWidget()
    /**
    * @param context
    * @param remoteViews
    */
    public static void updateWidget(Context context, RemoteViews remoteViews)
    {
        String Prefix = context.getString(R.string._prefix);

        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
        String ToShow = prefs.getString(context.getString(
                     R.string.Widget_string),
                     context.getString(R.string.default_string));

        String pkgName = context.getPackageName();
        int resID = context.getResources().getIdentifier(Prefix + ToShow, "drawable", pkgName);

        WidgetController widgetController = WidgetController.getInstance();
        widgetController.setRemoteViewImageViewSource(remoteViews, R.id.WidgetImage, resID);
    }

    public static class WidgetService extends Service
    {
        @Override
        public void onStart(Intent intent, int startId)
        {
            super.onStart(intent, startId);
            // Update the widget
            RemoteViews remoteView = buildRemoteView(this);

            // Push update to homescreen
            WidgetController.getInstance().pushUpdate(
                    remoteView, 
                    getApplicationContext(),
                    testWidget.class);

            // No more updates so stop the service and free resources
            stopSelf();
        }

        public RemoteViews buildRemoteView(Context context)
        {
            RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.test_widget);

            Intent configIntent = new Intent(context, EditPreferences.class);
            configIntent.setAction(testWidget.PREFENCES_WIDGET_CONFIGURE);


            configIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgets[0]);

            //configIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            PendingIntent runtestPendingIntent = PendingIntent.getActivity(context, 0, configIntent, PendingIntent.FLAG_UPDATE_CURRENT);
            remoteViews.setOnClickPendingIntent(R.id.WidgetImage, runtestPendingIntent);

            WidgetController controller =  WidgetController.getInstance();

            controller.updateWidget(context, remoteViews);

            return remoteViews;
        }

        @Override
        public void onConfigurationChanged(Configuration newConfig)
        {
            int oldOrientation = this.getResources().getConfiguration().orientation;

            if(newConfig.orientation != oldOrientation)
            {
                // Update the widget
                RemoteViews remoteView = buildRemoteView(this);

                // Push update to homescreen
                WidgetController.getInstance().pushUpdate(
                        remoteView, 
                        getApplicationContext(),
                        testWidget.class);
            }
        }

        @Override
        public IBinder onBind(Intent arg0)
        {
            // TODO Auto-generated method stub
            return null;
        }
    }
}

预防课程

public class EditPreferences extends PreferenceActivity implements OnSharedPreferenceChangeListener
{
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.preferences);
        Intent intent = getIntent();
        m_extras = intent.getExtras();
    }
    private Bundle m_extras;

    @Override
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) 
    {
        if(key.equals(getString(R.string.rlvntString)))
        {
            Context ctx = getApplicationContext();
            AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(ctx);
            setResult(RESULT_CANCELED);
            if (m_extras != null) 
            {
                Intent resultValue = new Intent();

                String stringID = AppWidgetManager.EXTRA_APPWIDGET_ID;
                mAppWidgetId = m_extras.getInt(
                            stringID, 
                            AppWidgetManager.INVALID_APPWIDGET_ID);
                RemoteViews views = new RemoteViews(ctx.getPackageName(),R.layout.test_widget);

                WidgetController.getInstance().updateWidget(ctx, views);

                appWidgetManager.updateAppWidget(mAppWidgetId, views);
                resultValue.putExtra(stringID, mAppWidgetId);
                setResult(RESULT_OK, resultValue);
                finish();
            }
        }
    }
}

Answer 1

buildRemoteView必须在EditPreferences中定义，而不是在Widget类中定义。我遇到了同样的问题，但在研究完之后：http://developer.android.com/guide/topics/appwidgets/index.html#Configuring我将所有remoteView建筑物移动到配置活动 - 它现在正在工作

配置更改后，小部件不会刷新

1 个答案: