アプリアイコン読み込み時、画像がでかい場合は縮小するXposedモジュール。 ダウンロード： http://ux.getuploader.com/75py/download/34/XIconSizeFixer.apk

ModIconSizeFixer.java

package com.nagopy.android.xposed.iconsizefixer;

import android.content.pm.PackageItemInfo;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.content.res.XModuleResources;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;

import de.robv.android.xposed.IXposedHookZygoteInit;
import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.XC_MethodReplacement;
import de.robv.android.xposed.XposedBridge;
import de.robv.android.xposed.XposedHelpers;

/**
 * Created by nagopy on 14/03/22.
 */
public class ModIconSizeFixer implements IXposedHookZygoteInit {

    private static final String TAG = "ModIconSizeFixer";

    @Override
    public void initZygote(StartupParam startupParam) throws Throwable {
//        log("hook start!");

        final Resources moduleResources = XModuleResources.createInstance(startupParam.modulePath, null);
        final int ICON_SIZE = moduleResources.getDimensionPixelSize(R.dimen.app_icon_size);

        XposedHelpers.findAndHookMethod(PackageItemInfo.class, "loadIcon", PackageManager.class, new XC_MethodReplacement() {
                    @Override
                    protected Object replaceHookedMethod(MethodHookParam methodHookParam) throws Throwable {
//                        log("loadIcon");
                        Drawable original = (Drawable) invokeOriginalMethod(methodHookParam);
                        try {
                            if (original.getIntrinsicWidth() > ICON_SIZE || original.getIntrinsicHeight() > ICON_SIZE) {
                                // resize
//                                log("resize");
                                return toDrawable(moduleResources, resizeBitmap(toBitmap(original), ICON_SIZE, ICON_SIZE));
                            } else {
                                // original
//                                log("original");
                                return original;
                            }
                        } catch (Throwable t) {
                            XposedBridge.log(t);
//                            log("error:" + t);
                            return original;
                        }
                    }
                }
        );

//        log("hook success!");
    }


    /**
     * invoke original method.
     *
     * @param param {@link de.robv.android.xposed.XC_MethodHook.MethodHookParam}
     * @return オリジナルのメソッドの戻り値
     */
    public static Object invokeOriginalMethod(XC_MethodHook.MethodHookParam param) throws Exception {
        return XposedBridge.invokeOriginalMethod(param.method, param.thisObject, param.args);
    }

    /**
     * Bitmap -> Drawable
     *
     * @param bitmap original bitmap
     * @return drawable
     */
    public static Drawable toDrawable(Resources res, Bitmap bitmap) {
        Drawable drawable = new BitmapDrawable(res, bitmap);
        return drawable;
    }

    /**
     * Bitmap -> Drawable
     *
     * @param bitmap original bitmap
     * @return drawable
     */
    public static Drawable toDrawable(Bitmap bitmap) {
        return toDrawable(null, bitmap);
    }

    /**
     * Drawable -> Bitmap
     *
     * @param drawable original drawable
     * @return bitmap
     */
    public static Bitmap toBitmap(Drawable drawable) {
        return ((BitmapDrawable) drawable).getBitmap();
    }

    /**
     * resize image.
     *
     * @param originalBitmap original bitmap
     * @param newWidth       width
     * @param newHeight      height
     * @return resized bitmap
     */
    public static Bitmap resizeBitmap(Bitmap originalBitmap, int newWidth, int newHeight) {
        int originalBitmapWidth = originalBitmap.getWidth();
        int originalBitmapHeight = originalBitmap.getHeight();

        Matrix matrix = new Matrix();
        matrix.postScale(((float) newWidth) / originalBitmapWidth, ((float) newHeight) / originalBitmapHeight);

        Bitmap resizedBitmap = Bitmap.createBitmap(originalBitmap, 0, 0, originalBitmapWidth, originalBitmapHeight, matrix, false);
        return resizedBitmap;
    }

    /**
     * print debug messages
     *
     * @param obj target object
     */
    private static void log(Object obj) {
        if (obj == null) {
            obj = "null";
        }
        XposedBridge.log(TAG + ": " + obj);
    }

}