如何在Android应用程序中创建小部件? (使用App Widget Host类吗?) [英] How can you create a widget inside an android application? (Use App Widget Host class?)

问题描述

我需要创建一个包含多个小部件的应用程序.这些不是桌面小部件.我需要能够像桌面小部件一样与这些小部件进行交互，但是需要将它们封装在更大的应用程序中. (每个小部件在单击时都有其自身的功能和行为.)

I need to create an application that contains multiple widgets. These are not desktop widgets. I need to be able to interact with these widgets as if they were desktop widgets, but they need to be encased inside a larger application. (Each widget has it's own functionality and behavior when clicked.)

在Android中这可能吗?还是我需要创建一个应用程序并创建每个我想像小部件一样实际充当视图的对象?

Is this possible in android? Or do I need to create an application and create each object that I'd like to behave like a widget actually as a view?

例如父应用程序用于汽车. 在应用程序中"小部件的示例有:换油历史记录(最近三个换油日期的列表可见，单击日期将打开收据的扫描等)，轮胎压力监测器，圈速历史记录(显示最近四圈) ，捏和展开将显示四个以上)，等等.

Ex. The parent app is for a car. Example of "in app" widgets are: oil change history (list of last three oil change dates visible, clicking on a date will open a scan of the receipt, etc.), tire pressure monitor, lap speed history (shows last four laps, pinching and expanding will show more than four), etc.

我可以制作每个这些对象小部件吗?还是必须是应用程序内部的视图?

Can I make each of these objects widgets? Or do they have to be views inside the app?

编辑:Android开发人员的应用小部件托管"页面提到:"AppWidgetHost为希望将应用程序小部件嵌入其UI的应用程序(如主屏幕)提供了与AppWidget服务的交互."
有没有人创建自己的App Widget Host或直接与此类一起工作?

The Android developer's App Widget Host page mentions: "The AppWidgetHost provides the interaction with the AppWidget service for apps, like the home screen, that want to embed app widgets in their UI."
Has anyone created their own App Widget Host or worked directly with this class?

推荐答案

正常创建您的appwidget

Create your appwidget normally

然后在您的活动中添加此代码 调用selectWidget()打开弹出窗口以选择可用的窗口小部件

Then in your activity add this code Call selectWidget() to open popup to pick avaible widget

//init
mAppWidgetManager = AppWidgetManager.getInstance(this);
mAppWidgetHost = new AppWidgetHost(this, R.id.APPWIDGET_HOST_ID);

//select widget
void selectWidget() {
    int appWidgetId = this.mAppWidgetHost.allocateAppWidgetId();
    Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);
    pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
    addEmptyData(pickIntent);
    startActivityForResult(pickIntent, R.id.REQUEST_PICK_APPWIDGET);
}
void addEmptyData(Intent pickIntent) {
    ArrayList customInfo = new ArrayList();
    pickIntent.putParcelableArrayListExtra(AppWidgetManager.EXTRA_CUSTOM_INFO, customInfo);
    ArrayList customExtras = new ArrayList();
    pickIntent.putParcelableArrayListExtra(AppWidgetManager.EXTRA_CUSTOM_EXTRAS, customExtras);
};

//Configure the widget
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK ) {
        if (requestCode == REQUEST_PICK_APPWIDGET) {
            configureWidget(data);
        }
        else if (requestCode == REQUEST_CREATE_APPWIDGET) {
            createWidget(data);
        }
    }
    else if (resultCode == RESULT_CANCELED && data != null) {
        int appWidgetId = data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
        if (appWidgetId != -1) {
            mAppWidgetHost.deleteAppWidgetId(appWidgetId);
        }
    }
}

private void configureWidget(Intent data) {
    Bundle extras = data.getExtras();
    int appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
    AppWidgetProviderInfo appWidgetInfo = mAppWidgetManager.getAppWidgetInfo(appWidgetId);
    if (appWidgetInfo.configure != null) {
        Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_CONFIGURE);
        intent.setComponent(appWidgetInfo.configure);
        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
        startActivityForResult(intent, REQUEST_CREATE_APPWIDGET);
    } else {
        createWidget(data);
    }
}

//adding it to you view
public void createWidget(Intent data) {
    Bundle extras = data.getExtras();
    int appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
    AppWidgetProviderInfo appWidgetInfo = mAppWidgetManager.getAppWidgetInfo(appWidgetId);
    AppWidgetHostView hostView = mAppWidgetHost.createView(this, appWidgetId, appWidgetInfo);
    hostView.setAppWidget(appWidgetId, appWidgetInfo);
    layout.addView(hostView);
}

//Update widget
@Override
protected void onStart() {
    super.onStart();
    mAppWidgetHost.startListening();
}
@Override
protected void onStop() {
    super.onStop();
    mAppWidgetHost.stopListening();
}

//Now to remove it call this
public void removeWidget(AppWidgetHostView hostView) {
    mAppWidgetHost.deleteAppWidgetId(hostView.getAppWidgetId());
    layout.removeView(hostView);
}

希望这会有所帮助

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