android - 如何使android小部件布局响应

Question

我正在为我的 Android 应用程序构建一个小部件，上面有几个按钮。根据小部件的大小，我希望小部件上的按钮数量增加和缩小。这是它当前在 4x1 View 中的样子:

当你将它缩小到 3x1 时:

有没有办法在 3x1 View 中动态隐藏第 4 个按钮，这样其他 3 个按钮就不会被压扁？同样适用于 2x1 或 1x1。对此的任何意见将不胜感激!

谢谢!

Answer 1

就像他们已经说过的那样。您可以使用 onAppWidgetOptionsChanged

所以我的建议是

1) 制作不同的布局。带有 3 和 4 个按钮。

2) 根据小部件列数更改布局。

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@Override
public void onAppWidgetOptionsChanged(Context context, AppWidgetManager appWidgetManager, int appWidgetId, Bundle newOptions) {

    // See the dimensions and
    Bundle options = appWidgetManager.getAppWidgetOptions(appWidgetId);

    // Get min width and height.
    int minWidth = options.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH);
    int minHeight = options.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT);

    // Obtain appropriate widget and update it.
    appWidgetManager.updateAppWidget(appWidgetId, getRemoteViews(context, minWidth, minHeight));
    super.onAppWidgetOptionsChanged(context, appWidgetManager, appWidgetId, newOptions);
}

/**
 * Determine appropriate view based on row or column provided.
 *
 * @param minWidth
 * @param minHeight
 * @return
 */
private RemoteViews getRemoteViews(Context context, int minWidth, int minHeight) {
    // First find out rows and columns based on width provided.
    int rows = getCellsForSize(minHeight);
    int columns = getCellsForSize(minWidth);
    // Now you changing layout base on you column count 
    // In this code from 1 column to 4
    // you can make code for more columns on your own.
    switch (columns) {
        case 1:  return new RemoteViews(context.getPackageName(), R.layout.activity_layout_widget_1column);
        case 2:  return new RemoteViews(context.getPackageName(), R.layout.activity_layout_widget_2column);
        case 3:  return new RemoteViews(context.getPackageName(), R.layout.activity_layout_widget_3column);
        case 4:  return new RemoteViews(context.getPackageName(), R.layout.activity_layout_widget_4column);
        default: return new RemoteViews(context.getPackageName(), R.layout.activity_layout_widget_4column);
    }
}

/**
 * Returns number of cells needed for given size of the widget.
 *
 * @param size Widget size in dp.
 * @return Size in number of cells.
 */
private static int getCellsForSize(int size) {
    int n = 2;
    while (70 * n - 30 < size) {
        ++n;
    }
    return n - 1;
}