小部件不会显示在模拟器或设备上，并且没有显示错误

Question

我是安卓开发新手。目前我正在尝试编写一个应用程序小部件。我已经完成了一些小部件教程，当我运行它们时，应用程序将运行，但小部件未显示在要使用的小部件列表中。不是应用程序扩展的小部件仍将像应用程序一样运行，并且不会显示在小部件列表中。 iv 尝试运行的所有小部件都会发生这种情况。没有错误显示。有人请帮助它让我发疯。谢谢

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.somethinginspiring"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.somethinginspiring.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>


        <!-- declaring widget -->
        <receiver android:name="AppWidgetProv"
            android:label="@string/app_name"
            android:icon="@drawable/ic_launcher">
            <intent-filter >
                <action 
                    android:name="android.appwidget.action.APPWIGET_UPDATE"/>
            </intent-filter>
            <!-- declaring the widget_info -->
            <meta-data 
                android:name="android.appwidget.provider"
                android:resource="@xml/widget_info"/>
         </receiver>

        <!-- declaring broadcaster -->
        <receiver
            android:name="WidgetIntentReceiver"
            android:label="WidgetBroadcastReceiver" >
            <intent-filter>
                <action android:name="android.appwidget.intent.action.CHANGE_PICTURE"/>
            </intent-filter>

            <!-- declaring meta-data -->
            <meta-data 
                android:name="android.appwidget.provider"
                android:resource="@xml/widget_info"/>
        </receiver>


    </application>

</manifest>

小部件信息 xml 文件

<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android" 
    android:initialLayout="@layout/widget_layout"
    android:minHeight="72dp"
    android:minWidth="300dp"
    android:widgetCategory="home_screen" 
    android:minResizeHeight="72dp" 
    android:minResizeWidth="300dp" 
    android:updatePeriodMillis="2000000">

<!-- android:updatePerMillis="3000000" -->
</appwidget-provider>

小部件布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >


    <ImageView
        android:id="@+id/widget_image_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:contentDescription="@string/image_view_text"
        android:clickable="true"
        android:src="@drawable/j_1" >

    </ImageView>

</LinearLayout>

应用小部件提供者

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;

public class AppWidgetProv extends AppWidgetProvider {




    @Override
    public void onEnabled(Context context) {
        // TODO Auto-generated method stub
        super.onEnabled(context);
    }

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager,
            int[] appWidgetIds) {
        RemoteViews remoteView = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
        remoteView.setOnClickPendingIntent(R.id.widget_image_view, buildButtonPendingIntent(context));

        super.onUpdate(context, appWidgetManager, appWidgetIds);
    }

    public PendingIntent buildButtonPendingIntent(Context context) {
        Intent changePicture = new Intent();
        changePicture.setAction("android.widget.intent.action.CHANGE_PICTURE");
        return PendingIntent.getBroadcast(context, 0, changePicture, PendingIntent.FLAG_UPDATE_CURRENT);
    }

    public static void pushWidgetUpdate(Context context, RemoteViews remoteView){
        ComponentName widget = new ComponentName(context, AppWidgetProv.class);
        AppWidgetManager manager = AppWidgetManager.getInstance(context);
        manager.updateAppWidget(widget, remoteView);
    }

}

小部件意图广播接收器

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;


public class WidgetIntentReceiver extends BroadcastReceiver {
    private static int currentImage = 0;

    int[] images = {R.drawable.j_1};

    @Override
    public void onReceive(Context context, Intent intent) {
        if(intent.getAction().equals("android.appwidget.intent.action.CHANGE_PICTURE"));
        RemoteViews remote = new RemoteViews(context.getPackageName(),R.layout.widget_layout);
        remote.setImageViewResource(R.id.widget_image_view, getImageToSet());

    }

    private int getImageToSet(){
        currentImage++;
        return currentImage = currentImage % images.length ;



    }

}

Answer 1

您的清单中有错字。这个：

<action android:name="android.appwidget.action.APPWIGET_UPDATE"/>

应该改成这样：

<action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>

请注意原文中“APPWIGET_UPDATE”中缺少的“D”。