获取未安装的APK图标、版本、包名、名称、是否安装、安装、打开

一、获取APK图标

通常读取APK的图标可以用，PackageManager里面的getApplicationIcon(ApplicationInfo)来得到一个drawable。但实际使用的时候经常只能得到一个默认的图标，根本不是APK的图标。

参考小米开源文件管理器，结合实践，代码如下：

/*       * 采用了新的办法获取APK图标，之前的失败是因为android中存在的一个BUG,通过       * appInfo.publicSourceDir = apkPath;来修正这个问题，详情参见:       * http://code.google.com/p/android/issues/detail?id=9151       */      public static Drawable getApkIcon(Context context, String apkPath) {          PackageManager pm = context.getPackageManager();          PackageInfo info = pm.getPackageArchiveInfo(apkPath,                  PackageManager.GET_ACTIVITIES);          if (info != null) {              ApplicationInfo appInfo = info.applicationInfo;              appInfo.sourceDir = apkPath;              appInfo.publicSourceDir = apkPath;              try {                  return appInfo.loadIcon(pm);              } catch (OutOfMemoryError e) {                  Log.e("ApkIconLoader", e.toString());              }          }          return null;      }

以下代码段中PackageManager、PackageInfo、ApplicationInfo均同上面一致。

二、获取APK名称

String label = appInfo.loadLabel(mPackManager).toString();

三、获取APK包名

String packageName = appInfo.packageName;

四、获取APK版本

String version = info.versionName==null?"0":info.versionName

五、判断APK是否安装

private boolean isApkInstalled(String packagename)     {       PackageManager localPackageManager = getPackageManager();       try       {         PackageInfo localPackageInfo = localPackageManager.getPackageInfo(packagename, PackageManager.GET_UNINSTALLED_PACKAGES);         return true;       }       catch (PackageManager.NameNotFoundException localNameNotFoundException)       {        return false;       }            }

六、安装APK

 private void installAPK(String apkPath)    {     Intent intent = new Intent();     intent.setAction(Intent.ACTION_VIEW);     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);     intent.setDataAndType(Uri.parse("file://" + apkPath),       "application/vnd.android.package-archive");     mContext.startActivity(intent);    }

七、打开APK

 private void openAPK(String packagename)    {       PackageManager packageManager = mContext.getPackageManager();        Intent intent=new Intent();        intent =packageManager.getLaunchIntentForPackage(packagename);        mContext.startActivity(intent);    }