一、獲取APK圖示

通常讀取APK的圖示可以用，PackageManager裡面的getApplicationIcon(ApplicationInfo)來得到一個drawable。但實際使用的時候經常只能得到一個預設的圖示，根本不是APK的圖示。

參考小米開原始檔管理器，結合實踐，程式碼如下：

/*
   * 採用了新的辦法獲取APK圖示，之前的失敗是因為android中存在的一個BUG,通過
   * appInfo.publicSourceDir = apkPath;來修正這個問題，詳情參見:
   * 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;
  }

以下程式碼段中PackageManager、PackageInfo、ApplicationInfo均同上面一致。

二、獲取APK名稱

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

三、獲取APK包名

String packageName = appInfo.packageName;

四、獲取APK版本

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

五、判斷APK是否安裝

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、安裝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、開啟APK

</pre><pre name="code" class="java"> private void openAPK(String packagename)
   {
       PackageManager packageManager = mContext.getPackageManager(); 
       Intent intent=new Intent(); 
       intent =packageManager.getLaunchIntentForPackage(packagename); 
       mContext.startActivity(intent);
   }