Android 获取未安装的APK图标

网上关于"获取未安装的APK图标"的文章满天飞,但都是转帖,运行后的效果却是获取到Android的默认小机器人图标.那个暴寒....

现提供解决方法如下,废话不说,上效果图,见代码:

本方法需要使用到Java反射的知识,具体请参考:

http://java.sun.com/developer/technicalArticles/ALT/Reflection/index.html

借鉴的Android源码出处:

XXoo这个链接好长ooXX

package lab.sodino.fetchapkicon;import java.io.File;import java.lang.reflect.Constructor;import java.lang.reflect.Field;import java.lang.reflect.Method;import android.app.Activity;import android.content.Context;import android.content.pm.ApplicationInfo;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.content.res.Resources;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.util.DisplayMetrics;import android.util.Log;import android.view.View;import android.widget.ImageView;/** * @author Sodino sodinoopen@hotmail.com * @since 2011年3月1日13时00分41秒 * */public class FetchAPKIconAct extends Activity {public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);showUninstallAPKIcon("/sdcard/APK/JarodYv.FishPool.apk");getUninatllApkInfo(this, "/sdcard/APK/JarodYv.FishPool.apk");}/** 网传的方法,但获取不成功 */public void getUninatllApkInfo(Context context, String archiveFilePath) {PackageManager pm = context.getPackageManager();PackageInfo info = pm.getPackageArchiveInfo(archiveFilePath, PackageManager.GET_ACTIVITIES);if (info != null) {ApplicationInfo appInfo = info.applicationInfo;Drawable icon = pm.getApplicationIcon(appInfo);ImageView image = (ImageView) findViewById(R.id.apkIconByTradition);image.setVisibility(View.VISIBLE);image.setImageDrawable(icon);}}//private void showUninstallAPKIcon(String apkPath) {String PATH_PackageParser = "android.content.pm.PackageParser";String PATH_AssetManager = "android.content.res.AssetManager";try {// apk包的文件路径// 这是一个Package 解释器, 是隐藏的// 构造函数的参数只有一个, apk文件的路径// PackageParser packageParser = new PackageParser(apkPath);Class pkgParserCls = Class.forName(PATH_PackageParser);Class[] typeArgs = new Class[1];typeArgs[0] = String.class;Constructor pkgParserCt = pkgParserCls.getConstructor(typeArgs);Object[] valueArgs = new Object[1];valueArgs[0] = apkPath;Object pkgParser = pkgParserCt.newInstance(valueArgs);Log.d("ANDROID_LAB", "pkgParser:" + pkgParser.toString());// 这个是与显示有关的, 里面涉及到一些像素显示等等, 我们使用默认的情况DisplayMetrics metrics = new DisplayMetrics();metrics.setToDefaults();// PackageParser.Package mPkgInfo = packageParser.parsePackage(new// File(apkPath), apkPath,// metrics, 0);typeArgs = new Class[4];typeArgs[0] = File.class;typeArgs[1] = String.class;typeArgs[2] = DisplayMetrics.class;typeArgs[3] = Integer.TYPE;Method pkgParser_parsePackageMtd = pkgParserCls.getDeclaredMethod("parsePackage",typeArgs);valueArgs = new Object[4];valueArgs[0] = new File(apkPath);valueArgs[1] = apkPath;valueArgs[2] = metrics;valueArgs[3] = 0;Object pkgParserPkg = pkgParser_parsePackageMtd.invoke(pkgParser, valueArgs);// 应用程序信息包, 这个公开的, 不过有些函数, 变量没公开// ApplicationInfo info = mPkgInfo.applicationInfo;Field appInfoFld = pkgParserPkg.getClass().getDeclaredField("applicationInfo");ApplicationInfo info = (ApplicationInfo) appInfoFld.get(pkgParserPkg);// uid 输出为"-1"，原因是未安装，系统未分配其Uid。Log.d("ANDROID_LAB", "pkg:" + info.packageName + " uid=" + info.uid);// Resources pRes = getResources();// AssetManager assmgr = new AssetManager();// assmgr.addAssetPath(apkPath);// Resources res = new Resources(assmgr, pRes.getDisplayMetrics(),// pRes.getConfiguration());Class assetMagCls = Class.forName(PATH_AssetManager);Constructor assetMagCt = assetMagCls.getConstructor((Class[]) null);Object assetMag = assetMagCt.newInstance((Object[]) null);typeArgs = new Class[1];typeArgs[0] = String.class;Method assetMag_addAssetPathMtd = assetMagCls.getDeclaredMethod("addAssetPath",typeArgs);valueArgs = new Object[1];valueArgs[0] = apkPath;assetMag_addAssetPathMtd.invoke(assetMag, valueArgs);Resources res = getResources();typeArgs = new Class[3];typeArgs[0] = assetMag.getClass();typeArgs[1] = res.getDisplayMetrics().getClass();typeArgs[2] = res.getConfiguration().getClass();Constructor resCt = Resources.class.getConstructor(typeArgs);valueArgs = new Object[3];valueArgs[0] = assetMag;valueArgs[1] = res.getDisplayMetrics();valueArgs[2] = res.getConfiguration();res = (Resources) resCt.newInstance(valueArgs);CharSequence label = null;if (info.labelRes != 0) {label = res.getText(info.labelRes);}// if (label == null) {// label = (info.nonLocalizedLabel != null) ? info.nonLocalizedLabel// : info.packageName;// }Log.d("ANDROID_LAB", "label=" + label);// 这里就是读取一个apk程序的图标if (info.icon != 0) {Drawable icon = res.getDrawable(info.icon);ImageView image = (ImageView) findViewById(R.id.apkIconBySodino);image.setVisibility(View.VISIBLE);image.setImageDrawable(icon);}} catch (Exception e) {e.printStackTrace();}}}

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