获取未安装的APK图标，获取安装APK图标

获取未安装的APK图标，获取安装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:

1.[图片] 3f7f41d4g9f496933f377&690.jpg

2.[Java]代码

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;

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");
 }
 
 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();
  }
 }
}