Question

早上好每个人，试图让小部件上的onclick事件起作用，问题是在设置挂起意图的onUpdate函数之前没有完成后台asynctask。我对android有一点熟悉，但绝对还处于学习阶段。我在实际活动中所做的测试运行良好且正确，并且观察日志何时进入它肯定是一个时间问题。任何帮助将不胜感激!!

public class SingleClickWanIP extends AppWidgetProvider {
private static final String TAG = "waninfo";

private String myURL;
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    // There may be multiple widgets active, so update all of them
    Log.d(TAG,"started update: " + myURL);
    WifiManager wifiManager = (WifiManager)  context.getSystemService(WIFI_SERVICE);
    WifiInfo wifiInfo = wifiManager.getConnectionInfo();
    String ssid = wifiInfo.getSSID();
    String homessid = "\"MyRouterName\"";

    if (ssid.equalsIgnoreCase(homessid)){
        myURL = "192.168.1.106";
    }
    Log.d(TAG,"finished ssd check: " + myURL);
    String newURL = "http://"+myURL+":120";
    Uri uri = Uri.parse(newURL);
    Intent intent = new Intent(Intent.ACTION_VIEW, uri);

    PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
    RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.single_click_wan_ip);
    Log.d(TAG,"finished intent and remote views: " + myURL);
    views.setOnClickPendingIntent(R.id.ibOrange, pendingIntent);
    Log.d(TAG,"finished on click pending: " + myURL);

    final int N = appWidgetIds.length;
    for (int i = 0; i < N; i++) {
        updateAppWidget(context, appWidgetManager, appWidgetIds[i]);
    }
    Log.d(TAG,"finished onUpdate: " + myURL);
}



@Override
public void onEnabled(Context context) {
    ProcessURL process = new ProcessURL();
    process.execute("https://www.dropbox.com/link to get external ip value/wanip.txt?raw=1");
    Log.d(TAG,"started process: " + myURL);

}

private class ProcessURL extends AsyncTask<String, Void, String> {

    @Override
    protected String doInBackground(String... params) {
        Log.d(TAG,"started background");
        return GET(params[0]);
    }

    @Override
    protected void onPostExecute(String result) {
        myURL = result;
        Log.d(TAG,"finished and set myURL variable: " + myURL);
    }



    private  String GET(String url){
        InputStream inputStream = null;
        String result = "";
        try {

            // create HttpClient
            HttpClient httpclient = new DefaultHttpClient();

            // make GET request to the given URL
            HttpResponse httpResponse = httpclient.execute(new HttpGet(url));

            // receive response as inputStream
            inputStream = httpResponse.getEntity().getContent();

            // convert inputstream to string
            if(inputStream != null)
                result = convertInputStreamToString(inputStream);
            else
                result = "Did not work!";

        } catch (Exception e) {
            Log.d(TAG, e.getLocalizedMessage());
        }

        return result;
    }

    private String convertInputStreamToString(InputStream inputStream) throws IOException {
        BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
        String line = "";
        String result = "";
        while((line = bufferedReader.readLine()) != null)
            result += line;

        inputStream.close();
        return result;

    }
}

一点点背景，我很便宜并且不想支付no-ip或类似的东西。但我想与朋友和家人分享我的服务器访问权限，而不必告诉他们＆＃34;是的，只需输入xx.xx.xx.xxx:120即可到达那里＆＃34;。所以服务器写入我的Dropbox文件外部ip，我有一个来自Dropbox的共享链接，我在这个应用程序中使用它来获取值，然后打开我的服务器的站点。中提琴

修改

......得到了！摸索着我发现这篇文章关于小部件自发切换的奇怪行为修复了spontaneous widget。然后单击将不起作用，因为我必须使用if包装onupdate中的代码，因为它不会创建一个挂起的uri意图，其中null为url地址。所以...将挂起的onclick意图复制到onpostexecute进程，现在我是地毯中的一个错误。

感谢领导，非常感谢！

onpostexecute的内容：

            WifiManager wifiManager = (WifiManager) gContext.getSystemService(WIFI_SERVICE);
            WifiInfo wifiInfo = wifiManager.getConnectionInfo();
            String ssid = wifiInfo.getSSID();
            String homessid = "\"MyRouterName\"";

            if (ssid.equalsIgnoreCase(homessid)) {
                result = "192.168.1.106";
            }
            Log.d(TAG, "finished ssd check: " + result);
            myURL = "http://" + result + ":8080";

            Uri uri = Uri.parse(myURL);
            Intent intent = new Intent(Intent.ACTION_VIEW, uri);

            PendingIntent pendingIntent = PendingIntent.getActivity(gContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
            RemoteViews views = new RemoteViews(gContext.getPackageName(), R.layout.single_click_wan_ip);
            Log.d(TAG, "finished intent and remote views: " + myURL);
            views.setOnClickPendingIntent(R.id.ibOrange, pendingIntent);
            Log.d(TAG, "finished on click pending: " + myURL);

            ComponentName thisWidget = new ComponentName(gContext, SingleClickWanIP.class);
            gappWidgetManager.updateAppWidget(thisWidget, views);

            Log.d(TAG,"finished and set myURL variable: " + myURL);

Answer 1

我会请求更新asynctask onPostExecute上的小部件，因为那时你有了URL，现在可以正确设置挂起的意图了。

使用具有操作AppWidgetManager.ACTION_APPWIDGET_UPDATE的intent来请求窗口小部件更新。

Answer 2

在您的情况下，从IntentService更新小部件更安全，而不是从应用小部件提供商启动的AsyncTask更新。

onEnabled和onUpdate应该在（最多）10秒内完成。

我强烈建议您使用以下代码：

<强> SingleClickWanIP.java

public class SingleClickWanIP extends AppWidgetProvider
{
    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
    {
        context.startService(new Intent(context, ProcessURL.class));
    }

    @Override
    public void onEnabled(Context context)
    {
        context.startService(new Intent(context, ProcessURL.class));
    }
}

<强> ProcessURL.java

public class ProcessURL extends IntentService
{
    private static final String TAG = "waninfo";
    private String myURL;

    public ProcessURL()
    {
        super("ProcessURL__service");
        setIntentRedelivery(true);
    }

    @Override
    protected void onHandleIntent(Intent intent__)
    {
        myURL = GET("https://www.dropbox.com/link to get external ip value/wanip.txt?raw=1");
        Log.d(TAG,"finished and set myURL variable: " + myURL);

        WifiManager wifiManager = (WifiManager)  getSystemService(Context.WIFI_SERVICE);
        WifiInfo wifiInfo = wifiManager.getConnectionInfo();
        String ssid = wifiInfo.getSSID();
        String homessid = "\"MyRouterName\"";

        if (ssid.equalsIgnoreCase(homessid))
        {
            myURL = "192.168.1.106";
        }
        Log.d(TAG,"finished ssd check: " + myURL);
        myURL = "http://"+myURL+":120";
        Uri uri = Uri.parse(myURL);
        Intent intent = new Intent(Intent.ACTION_VIEW, uri);

        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
        RemoteViews views = new RemoteViews(getPackageName(), R.layout.single_click_wan_ip);
        Log.d(TAG,"finished intent and remote views: " + myURL);
        views.setOnClickPendingIntent(R.id.ibOrange, pendingIntent);
        Log.d(TAG,"finished on click pending: " + myURL);


        // Update all widgets

        AppWidgetManager manager = AppWidgetManager.getInstance(this);
        if(null != manager)
        {
            Log.d(TAG,"Updating all widgets...");
            manager.updateAppWidget(new ComponentName(this,SingleClickWanIP.class), views);
            Log.d(TAG,"finished and set myURL variable: " + myURL);
        }
    }

    private  String GET(String url)
    {
        InputStream inputStream = null;
        String result = "";
        try
        {
            // create HttpClient
            HttpClient httpclient = new DefaultHttpClient();

            // make GET request to the given URL
            HttpResponse httpResponse = httpclient.execute(new HttpGet(url));

            // receive response as inputStream
            inputStream = httpResponse.getEntity().getContent();

            // convert inputstream to string
            if(inputStream != null)
                result = convertInputStreamToString(inputStream);
            else
                result = "Did not work!";
        }
        catch (Exception e)
        {
            Log.d(TAG, e.getLocalizedMessage());
        }
        return result;
    }

    private String convertInputStreamToString(InputStream inputStream) throws IOException
    {
        BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
        String line = "";
        String result = "";
        while((line = bufferedReader.readLine()) != null)
            result += line;

        inputStream.close();
        return result;
    }
}

在AndroidManifest.xml文件的<application />标记中添加以下行：

<service android:name="[ADD-THE-PATH-TO-ProcessURL.java-HERE].ProcessURL" android:enabled="true" android:exported="false" />

asynctask没有完成onUpdate Android Widget

修改

onpostexecute的内容：

2 个答案: