android - 如何使用包管理器查找高分辨率图标

Question

我正在做一个应用，每个应用都需要更高分辨率的图标。

从今天早上开始，我做了一些研究，但没有找到有效的答案。

这是其中两个问题，对我来说有什么问题。

仅供引用，我已经从 packagemanager 检索了所有“packageinfo”，我找到了我需要的一切，除了高分辨率图标...

<强>1。使用 getDrawableForDensity:

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;
}
}

我的问题是我不明白要为 componentName 放什么。我如何使用从 packagemanager 获得的信息“构建”它？

2.其他解决方案 Retrieving xhdpi app icons from packageManager?

// Get the application's resources
Resources res = mPackageManager.getResourcesForApplication(appInfo);

// Get a copy of the configuration, and set it to the desired resolution
Configuration config = res.getConfiguration();
Configuration originalConfig = new Configuration(config);
config.densityDpi = DisplayMetrics.DENSITY_XHIGH;

// Update the configuration with the desired resolution
DisplayMetrics dm = res.getDisplayMetrics();
res.updateConfiguration(config, dm);

// Grab the app icon
Drawable appIcon = res.getDrawable(appInfo.icon);

// Set our configuration back to what it was
res.updateConfiguration(originalConfig, dm);

对于这一行，我对这一行有疑问:

Drawable appIcon = res.getDrawable(appInfo.icon);

关于“图标”的错误:

图标无法解析或不是字段

Answer 1

试试这个，它类似于你的代码，但它似乎对我有用:

//获取高分辨率图标

             Drawable appIcon;
List<Application> applications = new ArrayList<Application>();
         for (ApplicationInfo item : getInstalledApplications(packageManager)) {

             try {
               Resources resourcesForApplication = packageManager.getResourcesForApplication(item);
               Configuration config = resourcesForApplication.getConfiguration();
               Configuration originalConfig = new Configuration(config);

               DisplayMetrics displayMetrics = resourcesForApplication.getDisplayMetrics();
               DisplayMetrics originalDisplayMetrics =  resourcesForApplication.getDisplayMetrics();
               displayMetrics.densityDpi =  DisplayMetrics.DENSITY_DEFAULT;
               resourcesForApplication.updateConfiguration(config, displayMetrics);

               appIcon = resourcesForApplication.getDrawable(item.icon);
               resourcesForApplication.updateConfiguration(originalConfig, originalDisplayMetrics);
             } catch (PackageManager.NameNotFoundException e) {
               Log.e("check", "error getting Hi Res Icon :", e);
               appIcon = item.loadIcon(packageManager);
             }

             Application app = new Application();
             app.setTitle(item.loadLabel(packageManager).toString());
             app.setPackageName(item.packageName);
             // app.setImage(item.loadIcon(packageManager));
             app.setImage(appIcon);
             applications.add(app);
           }
    }