我正在尝试添加一个主屏幕小部件到我的应用程序,我的小部件不会出现在Android的小部件列表中.

我已经尝试重新启动设备,重新安装应用程序,更改配置文件中的参数,确保SD卡上没有安装应用程序.没有任何工作.

这是我现在的代码：

AndroidManifest.xml的应用程式标签内

<receiver
    android:name=".GulpWidgetProvider"
    android:icon="@mipmap/ic_launcher"
    android:label="Gulp">
    <intent-filter>
        <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
    </intent-filter>
    <Meta-data
        android:name="android.appwidget.provider"
        android:resource="@xml/gulp_widget_info" />
</receiver>

里面的/res/xml/gulp_widget_info.xml：

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
    android:initialLayout="@layout/layout_widget"
    android:minHeight="150dip"
    android:minWidth="400dip"
    android:updatePeriodMillis="86400000"
    android:widgetCategory="home_screen"
    android:resizeMode="none"
    android:minResizeHeight="150dip"/>

里面/res/layout/layout_widget.xml：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="150dip"
    android:background="@drawable/gradient"
    android:gravity="center_horizontal|top">

    <RelativeLayout
        android:layout_width="170dip"
        android:layout_height="150dip"
        android:gravity="center">


        <ProgressBar
            android:id="@+id/widget_consumption_progress_bar"
            style="?android:attr/progressBarStyleHorizontal"
            android:layout_width="150dip"
            android:layout_height="150dip"
            android:layout_centerInParent="true"
            android:indeterminate="false"
            android:max="100"
            android:progress="0"
            android:progressDrawable="@drawable/progressbar"
            android:secondaryProgress="100" />

        <ProgressBar
            android:id="@+id/widget_time_progress_bar"
            style="?android:attr/progressBarStyleHorizontal"
            android:layout_width="150dip"
            android:layout_height="150dip"
            android:layout_centerInParent="true"
            android:indeterminate="false"
            android:max="100"
            android:progress="0"
            android:progressDrawable="@drawable/progressbar2"
            android:secondaryProgress="100" />

        <TextView
            android:id="@+id/widget_water_consumed"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:fontFamily="sans-serif-light"
            android:gravity="center"
            android:maxLines="1"
            android:textColor="@color/white"
            android:textSize="30sp" />

        <TextView
            android:id="@+id/widget_unit"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/water_consumed"
            android:layout_centerInParent="true"
            android:fontFamily="sans-serif-light"
            android:gravity="center"
            android:maxLines="1"
            android:text="@string/milliliters_abbrev"
            android:textColor="@color/white"
            android:textSize="12sp" />

    </RelativeLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="horizontal"
        android:paddingLeft="10dip"
        android:paddingRight="10dip">


        <TextView
            android:id="@+id/widget_add"
            style="@style/GulpButton"
            android:layout_width="60dip"
            android:layout_height="60dip"
            android:background="@drawable/whitecirclebutton"
            android:gravity="center"
            android:text="@string/add_abbrev" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:orientation="vertical">

            <TextView
                android:id="@+id/widget_goal"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-light"
                android:textColor="@color/white"
                android:textSize="22sp" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-light"
                android:text="@string/target"
                android:textColor="@color/white_semi_translucent"
                android:textSize="14sp" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:orientation="vertical">

            <TextView
                android:id="@+id/widget_remaining"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-light"
                android:textColor="@color/white"
                android:textSize="22sp" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-light"
                android:text="@string/remaining"
                android:textColor="@color/white_semi_translucent"
                android:textSize="14sp" />
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

里面/java/info/andrewdahm/gulp/GulpWidgetProvider.java：

public class GulpWidgetProvider extends AppWidgetProvider {

    @Override
    public void onUpdate(Context context,AppWidgetManager appWidgetManager,int[] appWidgetIds) {
        final int N = appWidgetIds.length;

        // Perform this loop procedure for each App Widget that belongs to this provider
        for (int i=0; i<N; i++) {
            int appWidgetId = appWidgetIds[i];

            // Create an Intent to launch ExampleActivity
            Intent intent = new Intent(context,Main.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(context,intent,0);

            // Get the layout for the App Widget and attach an on-click listener
            // to the button
            RemoteViews views = new RemoteViews(context.getPackageName(),R.layout.layout_widget);
            views.setOnClickPendingIntent(R.id.widget_add,pendingIntent);

            // Tell the AppWidgetManager to perform an update on the current app widget
            appWidgetManager.updateAppWidget(appWidgetId,views);
        }
    }
}

任何想法为什么我的窗口小部件不会出现在窗口小部件列表中？