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