Question

简介

我正在尝试制作一个学校小工具作为作业。这是针对 Android SO并用Java编码完成的。我对此很陌生，因此我不得不阅读很多文档，尤其是从其主要Android开发人员网站上阅读文档，我对Android开发不感兴趣，因此非常欢迎快速而可靠的回答。

问题

我正在使用Intent向WidgetConfig从WidgetConfig类（活动）发送名称和ID。该数据应该是从小部件布局写入TextView的，但由于某种原因却没有。

在下面的这段代码中，如果您从提供的存储库中测试了该程序，则可能会看到我的尝试。

所以我的问题是：

如何从活动发送的数据中设法更新小部件？

 public class FerrixWidget extends AppWidgetProvider {


    static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
                                int appWidgetId) {

        CharSequence widgetText = context.getString(R.string.appwidget_text);
        // Construct the RemoteViews object
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.ferrix_widget);
        //views.setTextViewText(R.id.appwidget_text, widgetText);

        // Instruct the widget manager to update the widget
        appWidgetManager.updateAppWidget(appWidgetId, views);

        RemoteViews spm = new RemoteViews(context.getPackageName(), R.layout.ferrix_widget);
        spm.setTextViewText(R.id.alumnoName, "plsupdate");
    }


    //This is called to update the App Widget at intervals defined by the updatePeriodMillis attribute
    // in the AppWidgetProviderInfo.
    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        // There may be multiple widgets active, so update all of them
        for (int appWidgetId : appWidgetIds) {
            updateAppWidget(context, appWidgetManager, appWidgetId);
        }



    }

    //This is called when an instance the App Widget is created for the first time.
    @Override
    public void onEnabled(Context context) {
        // Enter relevant functionality for when the first widget is created
        System.out.println("[INFO] FIRST INSTANCE CREATED");
    }

    //This is called when the last instance of your App Widget is deleted from the App Widget host.
    @Override
    public void onDisabled(Context context) {
        // Enter relevant functionality for when the last widget is disabled
    }

    //This is called for every broadcast and before each of the above callback methods.
    @Override
    public void onReceive(Context context, Intent intent) {

        RemoteViews controles = new RemoteViews(context.getPackageName(), R.layout.ferrix_widget);

        String alumnoName = intent.getStringExtra("Name"); //Gets the intent withthe key "Name"

        System.out.println("[INFO] Key: Name gets result: " + alumnoName);


        controles.setTextViewText(R.id.alumnoName, alumnoName);
        controles.setTextViewText(R.id.claseName, "DAM2");

        System.out.println("[INFO] Context: " + context);
        System.out.println("[INFO] Received: " + intent.getAction().toString());
    }
}

完整代码位于

https://gitlab.com/JonaFerre/ferrixwidget

我的目标

我希望当您在屏幕上设置窗口小部件时，它会弹出一个配置屏幕（已经执行此操作），然后插入您的姓名和类别，此数据（通过Intent）发送到窗口小部件，以便它会在一天中的时间和其他一些东西旁边被写入并显示（一旦正确解决此问题，我会添加该东西）

注释：

IDE：Android Studio
Andriod：第15版

Answer 1

您可以通过更新窗口小部件的 onReceive 中的窗口小部件来轻松解决此问题：

只需通过配置活动发送广播：

loginBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            SharedPreferences prefs = getSharedPreferences("WidgetPrefs", Context.MODE_PRIVATE);
            SharedPreferences.Editor editor = prefs.edit();
            editor.putString("msg_" + widgetId, nameInput.getText().toString()); //???
            editor.commit();

            //Actualizar el widget tras la config
            System.out.println("[INFO] Getting instance of WidgetConfig");
            AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(WidgetConfig.this);
            System.out.println("[INFO] Updating the widget");
            FerrixWidget.updateAppWidget(WidgetConfig.this, appWidgetManager, widgetId);


            //Devolver un buen OK
            Intent resultado = new Intent();
            resultado.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
            //System.out.println("[CONFIG INFO] Name text is: " + nameInput.getText().toString());
            resultado.putExtra("Name", nameInput.getText().toString());
            resultado.setAction("myUpdate");
            ComponentName componentName = new ComponentName(getApplicationContext(), FerrixWidget.class);
            resultado.setComponent(componentName);
            sendBroadcast(resultado);

            setResult(RESULT_OK, getIntent());
            finish();
            System.out.println("[INFO] OK devuelto!");
        }
 });

以及小部件的 onReceive

public void onReceive(Context context, Intent intent) {

    if(intent.getAction() != null && intent.getAction().equals("myUpdate")) {
        RemoteViews controles = new RemoteViews(context.getPackageName(), R.layout.ferrix_widget);

        String alumnoName = intent.getStringExtra("Name"); //Gets the intent withthe key "Name"
        int id = intent.getIntExtra(
                AppWidgetManager.EXTRA_APPWIDGET_ID,
                AppWidgetManager.INVALID_APPWIDGET_ID);


        System.out.println("[INFO] Key: Name gets result: " + alumnoName);


        controles.setTextViewText(R.id.alumnoName, alumnoName);
        controles.setTextViewText(R.id.claseName, "DAM2");
        AppWidgetManager.getInstance(context).updateAppWidget(id, controles);

        System.out.println("[INFO] Context: " + context);
        System.out.println("[INFO] Received: " + intent.getAction().toString());
    } else {
        super.onReceive(context, intent);
    }
}

但是更好的方法是将数据和小部件的ID保存在db / preference中，然后在onUpdate的小部件方面进行更新。

请阅读official doc。有很多东西可以帮助您。

我应该在哪里设置逻辑以正确更新我的窗口小部件？

1 个答案: