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:
[图片] 3f7f41d4g9f496933f377&690.jpg
[代码] [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();
}
}
}
