安卓：可点击ImageView的部件 [英] Android: Clickable imageview widget

问题描述

我想打一个很简单的小工具：

I want to make a very simple widget:

这必须由只从一个图像视图

It must consist from just one image view

1）收到的短信应该改变形象

1) on incoming sms it should change the image

2）单击它也应该改变形象

2) on click it also should change the image

我试了一下使用的ImageButton进行，但失败：有与短信改变图像接收到的事件的问题：新的图像有错误的比例

I tried to make it using ImageButton but failed: there were problems with changing the image on sms received event: new image had wrong scale.

反正现在我想打一个ImageView的没有别的了。

Anyway now I want to make an ImageView without anything else.

问题是，我不能处理onClick事件：

The problem is that I can't handle onClick event:

我有一个正在运行的服务应该处理所有事件：收到短信，点击

I've got a running service which should handle all events: sms received and click:

部件供应商：

public class MyWidgetProvider extends AppWidgetProvider {
    @Override
    public void onDisabled(Context context) {
        context.stopService(new Intent(context, UpdateService.class));
        super.onDisabled(context);
    }

    @Override
    public void onEnabled(Context context) {
        super.onEnabled(context);
        Intent intent = new Intent(context, UpdateService.class);
        context.startService(intent);
    }

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager,
                     int[] appWidgetIds) {
        super.onUpdate(context, appWidgetManager, appWidgetIds);
        for (int i = 0; i < appWidgetIds.length; i++) {
            int appWidgetId = appWidgetIds[i];

            RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.main);
            Intent widgetClickIntent = new Intent(context, UpdateService.class);
            widgetClickIntent.setAction(UpdateService.ACTION_ON_CLICK);
            PendingIntent pendingIntentViewClick = PendingIntent.getService(context, 0, widgetClickIntent, 0);
            remoteViews.setOnClickPendingIntent(R.id.widget_imageview, pendingIntentViewClick);
            appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
        }
    }
}

服务：

public class UpdateService extends Service {
    static final String ACTION_SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";
    static final String ACTION_ON_CLICK = "android.MyWidget.ACTION_ON_CLICK";

    private final static IntentFilter intentFilter;

    static {
        intentFilter = new IntentFilter();
        intentFilter.addAction(ACTION_SMS_RECEIVED);
        intentFilter.addAction(ACTION_ON_CLICK);
    }


    public final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();

            if (action.equals(ACTION_SMS_RECEIVED)) {
                reactOnSms(context);
            }
            if (action.equals(ACTION_ON_CLICK)) {
                onCLick(context);
            }
        }
    };

    @Override
    public void onCreate() {
        super.onCreate();
        registerReceiver(broadcastReceiver, intentFilter);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        unregisterReceiver(broadcastReceiver);
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    private void reactOnSms(Context context) {
        // doSomething
    }

    public void onCLick(Context context) {
        // doSomething
    }

清单：

    <receiver a:name="..."...>
        <intent-filter>
            <action a:name="android.provider.Telephony.SMS_RECEIVED"/>
            <action a:name="android.MyWidget.ACTION_ON_CLICK"/>
        </intent-filter>
        <meta-data a:name="android.appwidget.provider"
                   a:resource="@xml/my_widget_provider_info"/>
    </receiver>
    <service a:name=".UpdateService"
            a:label="UpdateService">

        <intent-filter>
            <action a:name="android.provider.Telephony.SMS_RECEIVED"/>
            <action a:name="android.MyWidget.ACTION_ON_CLICK"/>
        </intent-filter>
    </service>

我试过这个可点击的小部件的Andr​​oid

推荐答案

我找到了解决办法。

对不起，你们谁读的问题。太多code里面，我明白了。

Sorry for those of you who read the question. Too much code inside, I understand.

的问题是，UpdateService不是广播意图的实际处理程序。匿名实现广播接收器中所做的所有工作。

The problem was that UpdateService was not the real handler of the broadcast intent. Anonymous implementation of BroadcastReceiver made all the work.

所以，问题是在这个code（widgetProvider）：

So the problem was in this code (widgetProvider):

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
                 int[] appWidgetIds) {
    super.onUpdate(context, appWidgetManager, appWidgetIds);
    for (int i = 0; i < appWidgetIds.length; i++) {
        int appWidgetId = appWidgetIds[i];

        RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.main);
        // wrong:
        // Intent widgetClickIntent = new Intent(context, UpdateService.class);
        // widgetClickIntent.setAction(UpdateService.ACTION_ON_CLICK);
        // PendingIntent pendingIntentViewClick = PendingIntent.getService(context, 0, widgetClickIntent, 0);
        // correct:
        Intent widgetClickIntent = new Intent(UpdateService.ACTION_ON_CLICK);
        PendingIntent pendingIntentViewClick = PendingIntent.getBroadcast(context, 0, widgetClickIntent, 0);
        ///////
        remoteViews.setOnClickPendingIntent(R.id.widget_imageview, pendingIntentViewClick);
        appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
    }
}

这篇关于安卓：可点击ImageView的部件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！