ApplicationInfo.java

package com.android.launcher3.util;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.provider.Settings;

/**
 * Created by Michele on 09/03/2017.
 */

public class ApplicationInfo {

    private static final String SCHEME = "package";

    private static final String APP_PKG_NAME_21 = "com.android.settings.ApplicationPkgName";

    private static final String APP_PKG_NAME_22 = "pkg";

    private static final String APP_DETAILS_PACKAGE_NAME = "com.android.settings";

    private static final String APP_DETAILS_CLASS_NAME = "com.android.settings.InstalledAppDetails";

    public static void showInstalledAppDetails(Context context, String packageName) {
        Intent intent = new Intent();
        final int apiLevel = Build.VERSION.SDK_INT;
        if (apiLevel >= 9) { // above 2.3
            intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
            Uri uri = Uri.fromParts(SCHEME, packageName, null);
            intent.setData(uri);
        } else { // below 2.3
            final String appPkgName = (apiLevel == 8 ? APP_PKG_NAME_22
                    : APP_PKG_NAME_21);
            intent.setAction(Intent.ACTION_VIEW);
            intent.setClassName(APP_DETAILS_PACKAGE_NAME,
                    APP_DETAILS_CLASS_NAME);
            intent.putExtra(appPkgName, packageName);
        }
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(intent);
    }

    public static boolean isMyLauncherDefault(Context context) {
        PackageManager localPackageManager = context.getPackageManager();
        Intent intent = new Intent("android.intent.action.MAIN");
        intent.addCategory("android.intent.category.HOME");
        String str = localPackageManager.resolveActivity(intent,
                PackageManager.MATCH_DEFAULT_ONLY).activityInfo.packageName;
        return str.equals(context.getPackageName());
    }

}