问题描述
我正在为 android 制作一个启动器,但我被困在小部件部分.我在互联网上搜索了大约一个半小时,试图弄清楚如何在我的应用程序中托管小部件,但没有运气.
I am making a launcher for android, and I'm stuck at the widget part. I've been searching for about an hour and a half on the internet trying to figure out how can I host widgets in my application, but no luck.
我已经查看了一些库存启动器和 ADW 启动器代码,但两者都只有数英里的代码,这是我第一次制作启动器.
I have went through some stock launchers and ADW launcher codes but both just have miles of code and this is the first time I'm making a launcher.
有人可以指导我如何将小部件添加到我的启动器中吗?或者至少发布任何链接/教程?请解释一下,因为这是我第一次.
Could someone please guide me through how can I add widgets into my launcher? Or at least post any links/tutorials? Please explain it since this is my first time.
推荐答案
试试这个:
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(); }
只要您想显示设备上安装的 AppWidget 列表以供选择,您只需调用方法 selectWidget().
All you've got to do is call the method selectWidget() whenever you want to show a list of AppWidgets installed on the device to pick from.
此代码有点像普通 Android 启动器的修改版本.
This code is a bit of a modified version of the stock Android launcher.
编辑:
要绑定小部件 ID,即让小部件更新并响应用户交互,请参阅此处的解决方案:小部件在重新时不响应- 通过代码添加
To bind widget IDs, i.e. make widgets update and respond to user interaction, refer the solution here: Widgets don't respond when re-added through code