Java – hosting widgets in the Android launcher

I'm making an Android launcher and I'm stuck in the widget section I've been searching the Internet for about an hour and a half to know how to host widgets in my application, but I'm not lucky

I have experienced some stock issuers and ADW transmitter codes, but only a few miles of codes. This is the first time I have made a transmitter

Can someone guide me on how to add widgets to my launcher? Or at least publish any links / tutorials? Please forgive me, because this is my first time

Solution

Try this:

final int APPWIDGET_HOST_ID = 2048;
final int REQUEST_PICK_APPWIDGET = 0;
final int REQUEST_CREATE_APPWIDGET = 5;

AppWidgetManager appWidgetManager;
AppWidgetHost appWidgetHost;

// Let user pick a widget from the list of intalled AppWidgets
public void selectWidget()
{
    int appWidgetId = this.appWidgetHost.allocateAppWidgetId();
    Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);
    pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,appWidgetId);
    addEmptyData(pickIntent);
    startActivityForResult(pickIntent,REQUEST_PICK_APPWIDGET);
}

// For some reason you have to add this empty data,else it won't work
public void addEmptyData(Intent pickIntent)
{
    ArrayList<appwidgetproviderInfo> customInfo = 
        new ArrayList<appwidgetproviderInfo>();
    pickIntent.putParcelableArrayListExtra(
        AppWidgetManager.EXTRA_CUSTOM_INFO,customInfo);
    ArrayList<Bundle> customExtras = new ArrayList<Bundle>();
    pickIntent.putParcelableArrayListExtra(
        AppWidgetManager.EXTRA_CUSTOM_EXTRAS,customExtras);
};

@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) {
            appWidgetHost.deleteAppWidgetId(appWidgetId);
        }
    }
}

// Show configuration activity of the widget picked by the user
private void configureWidget(Intent data) {
    Bundle extras = data.getExtras();
    int appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID,-1);
    appwidgetproviderInfo appWidgetInfo = 
            appWidgetManager.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);
    }
}

// Get an instance of the selected widget as a AppWidgetHostView
public void createWidget(Intent data) {
    Bundle extras = data.getExtras();
    int appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID,-1);
    appwidgetproviderInfo appWidgetInfo = appWidgetManager.getAppWidgetInfo(appWidgetId);

    AppWidgetHostView hostView = appWidgetHost.createView(this,appWidgetId,appWidgetInfo);
    hostView.setAppWidget(appWidgetId,appWidgetInfo);
    // Add  it on the layout you want
    myLayout.addView(hostView);
}

// Call this when you want to remove one from your layout
public void removeWidget(AppWidgetHostView hostView) {
    appWidgetHost.deleteAppWidgetId(hostView.getAppWidgetId());

    // Remove from your layout
    myLayout.removeView(hostView);
}

@Override
protected void onStart() {
    super.onStart();
    appWidgetManager = AppWidgetManager.getInstance(this);
    appWidgetHost = new AppWidgetHost(this,APPWIDGET_HOST_ID);

    // Start listening to pending intents from the widgets
    appWidgetHost.startListening();
}

@Override
protected void onStop() {
    super.onStop();
    appWidgetHost.stopListening();
}

You only need to select from the list of appwidgets installed on the device to call the selectwidget () method

This code is a modified version of the stock Android launcher