[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

view plain

packagelab.sodino.fetchapkicon;
importjava.io.File;
importjava.lang.reflect.Constructor;
importjava.lang.reflect.Field;
importjava.lang.reflect.Method;
importandroid.app.Activity;
importandroid.content.Context;
importandroid.content.pm.ApplicationInfo;
importandroid.content.pm.PackageInfo;
importandroid.content.pm.PackageManager;
importandroid.content.res.Resources;
importandroid.graphics.drawable.Drawable;
importandroid.os.Bundle;
importandroid.util.DisplayMetrics;
importandroid.util.Log;
importandroid.view.View;
importandroid.widget.ImageView;
/**
*@authorSodinosodinoopen@hotmail.com
*@since2011年3月1日13时00分41秒
**/
publicclassFetchAPKIconActextendsActivity{
publicvoidonCreate(BundlesavedInstanceState){
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*/
publicvoidgetUninatllApkInfo(Contextcontext,StringarchiveFilePath){
PackageManagerpm=context.getPackageManager();
PackageInfoinfo=pm.getPackageArchiveInfo(archiveFilePath,PackageManager.GET_ACTIVITIES);
if(info!=null){
ApplicationInfoappInfo=info.applicationInfo;
Drawableicon=pm.getApplicationIcon(appInfo);
ImageViewimage=(ImageView)findViewById(R.id.apkIconByTradition);
image.setVisibility(View.VISIBLE);
image.setImageDrawable(icon);
}
}
//
privatevoidshowUninstallAPKIcon(StringapkPath){
StringPATH_PackageParser="android.content.pm.PackageParser";
StringPATH_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
//PackageParserpackageParser=newPackageParser(apkPath);
ClasspkgParserCls=Class.forName(PATH_PackageParser);
Class[]typeArgs=newClass[1];
typeArgs[0]=String.class;
ConstructorpkgParserCt=pkgParserCls.getConstructor(typeArgs);
Object[]valueArgs=newObject[1];
valueArgs[0]=apkPath;
ObjectpkgParser=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
DisplayMetricsmetrics=newDisplayMetrics();
metrics.setToDefaults();
//PackageParser.PackagemPkgInfo=packageParser.parsePackage(new
//File(apkPath),apkPath,
//metrics,0);
typeArgs=newClass[4];
typeArgs[0]=File.class;
typeArgs[1]=String.class;
typeArgs[2]=DisplayMetrics.class;
typeArgs[3]=Integer.TYPE;
MethodpkgParser_parsePackageMtd=pkgParserCls.getDeclaredMethod("parsePackage",
typeArgs);
valueArgs=newObject[4];
valueArgs[0]=newFile(apkPath);
valueArgs[1]=apkPath;
valueArgs[2]=metrics;
valueArgs[3]=0;
ObjectpkgParserPkg=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
//ApplicationInfoinfo=mPkgInfo.applicationInfo;
FieldappInfoFld=pkgParserPkg.getClass().getDeclaredField("applicationInfo");
ApplicationInfoinfo=(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);
//ResourcespRes=getResources();
//AssetManagerassmgr=newAssetManager();
//assmgr.addAssetPath(apkPath);
//Resourcesres=newResources(assmgr,pRes.getDisplayMetrics(),
//pRes.getConfiguration());
ClassassetMagCls=Class.forName(PATH_AssetManager);
ConstructorassetMagCt=assetMagCls.getConstructor((Class[])null);
ObjectassetMag=assetMagCt.newInstance((Object[])null);
typeArgs=newClass[1];
typeArgs[0]=String.class;
MethodassetMag_addAssetPathMtd=assetMagCls.getDeclaredMethod("addAssetPath",
typeArgs);
valueArgs=newObject[1];
valueArgs[0]=apkPath;
assetMag_addAssetPathMtd.invoke(assetMag,valueArgs);
Resourcesres=getResources();
typeArgs=newClass[3];
typeArgs[0]=assetMag.getClass();
typeArgs[1]=res.getDisplayMetrics().getClass();
typeArgs[2]=res.getConfiguration().getClass();
ConstructorresCt=Resources.class.getConstructor(typeArgs);
valueArgs=newObject[3];
valueArgs[0]=assetMag;
valueArgs[1]=res.getDisplayMetrics();
valueArgs[2]=res.getConfiguration();
res=(Resources)resCt.newInstance(valueArgs);
CharSequencelabel=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){
Drawableicon=res.getDrawable(info.icon);
ImageViewimage=(ImageView)findViewById(R.id.apkIconBySodino);
image.setVisibility(View.VISIBLE);
image.setImageDrawable(icon);
}
}catch(Exceptione){
e.printStackTrace();
}
}
}

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