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....

见代码:
 

2011-3-1 13:29 上传

下载附件 (13.74 KB)

 

本方法需要使用到Java反射的知识,具体请参考:
http://java.sun.com/developer/te ... flection/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 [e-mail]
 
* @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();
 
                }
 
        }
 
}