使用PackageManager.getApplicationIcon检索高分辨率图标

Question

对于类似主屏幕的应用程序,我正在尝试收集最高分辨率的应用程序图标.主屏幕会显示更大的图标,因此我需要一个高分辨率图标.

这是我的代码:

final PackageManager pk = getPackageManager();
final String size;
try {
    Drawable d = pk.getApplicationIcon("com.mycompany.android.icontest");
    size = String.format("Width: %d, height: %d", d.getMinimumWidth(), d.getMinimumHeight());
} catch (PackageManager.NameNotFoundException e) {
    return;
}

此代码将图标读入drawable.在该特定包中将存在2个图标,res-hdpi图标和res-xhdpi图标.使用上述方法,只会HDPI读取版本.

如何XHDPI默认阅读该版本？

Answer 1

您可以使用getDrawableForDensity()返回与在DPI给定的屏幕密度的特定资源ID相关联的绘制对象:

ActivityInfo info = packageManager.getActivityInfo(componentName, PackageManager.GET_META_DATA);

Resources resources;
try {
    resources = mPackageManager.getResourcesForApplication(
            info.applicationInfo);
} catch (PackageManager.NameNotFoundException e) {
    resources = null;
}

if (resources != null) {
    int iconId = info.getIconResource();
    if (iconId != 0) {
        Drawable d;
        try {
            d = resources.getDrawableForDensity(iconId, DisplayMetrics.DENSITY_XHIGH);
        } catch (Resources.NotFoundException e) {
            d = null;
        }
        return d;
    }
}