Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;

public class Main {
    public static Bitmap packageNameToBitmap(PackageManager packageManager, String packageName) {
        try {
            ApplicationInfo applicationInfo = packageManager.getApplicationInfo(packageName,
                    PackageManager.GET_META_DATA);
            Resources resources = packageManager.getResourcesForApplication(applicationInfo);
            int appIconResId = applicationInfo.icon;
            return resIdToBitmap(resources, appIconResId);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static Bitmap packageNameToBitmap(Context context, PackageManager packageManager, String packageName,
            int resId) {
        try {
            ApplicationInfo applicationInfo = packageManager.getApplicationInfo(packageName,
                    PackageManager.GET_META_DATA);
            Resources resources = packageManager.getResourcesForApplication(applicationInfo);
            Bitmap bitmap = resIdToBitmap(resources, resId);
            if (bitmap == null) {
                Drawable drawable = packageManager.getApplicationIcon(packageName);
                if (drawable != null) {
                    bitmap = drawableToBitmap(drawable);
                }
            }
            return bitmap;
        } catch (PackageManager.NameNotFoundException | Resources.NotFoundException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static Bitmap resIdToBitmap(Resources res, int resId) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inScaled = false;
        options.inDither = false;
        options.inPreferredConfig = Bitmap.Config.ARGB_8888;
        options.inPreferQualityOverSpeed = true;
        try {
            return BitmapFactory.decodeResource(res, resId, options);
        } catch (OutOfMemoryError e1) {
            e1.printStackTrace();
            return null;
        }
    }

    public static Bitmap drawableToBitmap(Drawable drawable) {
        Bitmap bitmap = null;

        if (drawable instanceof BitmapDrawable) {
            BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
            bitmapDrawable.setAntiAlias(true);
            bitmapDrawable.setDither(true);
            bitmapDrawable.setTargetDensity(Integer.MAX_VALUE);
            if (bitmapDrawable.getBitmap() != null) {
                return bitmapDrawable.getBitmap();
            }
        }

        if (drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
            bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
        } else {
            bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(),
                    Bitmap.Config.ARGB_8888);
        }

        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);
        return bitmap;
    }
}