嗨,我正在开发一个程序,在 4 小部件显示和正常工作之前的 android 版本上开发一个小部件,但在 4.xx 版本中,它甚至没有在小部件 neighter 锁屏或主屏幕中列出。
这是我的代码:
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
public class widget extends AppWidgetProvider {
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
final int N = appWidgetIds.length;
// Perform this loop procedure for each App Widget that belongs to this provider
for (int i=0; i<N; i++) {
int appWidgetId = appWidgetIds[i];
// Create an Intent to launch ExampleActivity
Intent intent = new Intent(context, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
// Get the layout for the App Widget and attach an on-click listener
// to the button
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
views.setOnClickPendingIntent(R.id.wdbtn, pendingIntent);
// Tell the AppWidgetManager to perform an update on the current app widget
appWidgetManager.updateAppWidget(appWidgetId, views);
//test
int widgetId = 0;
Bundle myOptions = appWidgetManager.getAppWidgetOptions (widgetId);
// Get the value of OPTION_APPWIDGET_HOST_CATEGORY
int category = myOptions.getInt(AppWidgetManager.OPTION_APPWIDGET_HOST_CATEGORY, -1);
// If the value is WIDGET_CATEGORY_KEYGUARD, it's a lockscreen widget
boolean isKeyguard = category == AppWidgetProviderInfo.WIDGET_CATEGORY_KEYGUARD;
int baseLayout = isKeyguard ? R.layout.keyguardwidget : R.layout.widget;
}
}
这是我的小部件 xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageButton
android:id="@+id/wdbtn"
android:layout_width="61dp"
android:layout_height="66dp"
android:background="@null"
android:contentDescription="@null"
android:maxHeight="48dp"
android:maxWidth="48dp"
android:minHeight="48dp"
android:minWidth="48dp"
android:padding="0dp"
android:scaleType="fitXY"
android:src="@drawable/ic_launcher" />
和小部件 xml 信息:
<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
android:initialLayout="@layout/widget"
android:updatePeriodMillis="3000"
android:previewImage="@drawable/ic_launcher"
android:resizeMode="horizontal|vertical"
android:widgetCategory="home_screen|keyguard"
android:initialKeyguardLayout="@layout/keyguardwidget">
和清单:
<receiver android:name="widget" >
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data android:name="android.appwidget.provider"
android:resource="@xml/widgetinfo" />
</receiver>
正如我所说的小部件可以在旧设备上完美运行,但在新设备中它没有显示。抱歉,我想显示所有内容。当然,我还有另一种键盘保护布局,但我认为没有必要把它放在这里。