我正在构建一个自定义启动器。我遵循了这些步骤在Android文档中提到的用于托管App Widgets和浏览默认的Launcher源代码。但是当我调用startActivityForResult使用的意图行动AppWidgetManager。ACTION_APPWIDGET_BIND,它总是返回Activity。RESULT_CANCELED即使用户正在接受UI上显示的对话框提示
下面是代码片段
appWidgetManager = AppWidgetManager.getInstance(this);
appWidgetHost = new AppWidgetHost(this, 7772);
int appWidgetId = appWidgetHost.allocateAppWidgetId();
Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);
pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
startActivityForResult(pickIntent, REQUEST_PICK);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.d(TAG, " onActivityResult " + requestCode + " res " + resultCode);
if (requestCode == REQUEST_PICK && resultCode == Activity.RESULT_OK)
{
int appWidgetId = data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
AppWidgetProviderInfo info = appWidgetManager.getAppWidgetInfo(appWidgetId);
boolean hasPermission = appWidgetManager.bindAppWidgetIdIfAllowed(appWidgetId, info.provider);
if (!hasPermission)
{
Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_BIND);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_PROVIDER, info.provider);
startActivityForResult(intent, REQUEST_BIND);
}
}else if (requestCode == REQUEST_BIND) {
// Here the resultCode is always returning Activity.RESULT_CANCELED
}
}
谁能告诉我我可能做错了什么?
我还添加了android:name="android.permission. bind_appwidget "
最后,通过Android日志,我可以看到像
这样的错误1567-1940/system_process E/AppWidgetServiceImpl: Widget id 34 already bound to: ProviderId{user:0, app:10025, cmp:ComponentInfo{com.android.deskclock/com.android.alarmclock.AnalogAppWidgetProvider}}
找到问题。在这里回答,以防其他人遇到同样的问题。
如果您使用AppWidgetManager。ACTION_APPWIDGET_PICK打算从Android操作系统显示的选择器中选择意图,不需要绑定,因为框架会自动绑定小部件。
如果你实现了一个自定义的选择器(例如,在许多自定义启动器中实现的显示小部件预览图像的东西),那么绑定是必要的。