import android.content.Context;

import android.content.Intent;

import android.content.pm.ApplicationInfo;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.content.pm.PackageManager.NameNotFoundException;

import android.net.Uri;

import java.io.File;

public class PackageUtils {

   protected static final String TAG = PackageUtils.class.getSimpleName();

   /**

    * 安装apk应用

    */

   public static void installAPK(Context context, File apkFile) {

      if (apkFile.isFile()) {

         String fileName = apkFile.getName();

         String postfix = fileName.substring(fileName.length() - 4, fileName.length());

         if (postfix.toLowerCase().equals(".apk")) {

            String cmd = "chmod 755 " + apkFile.getAbsolutePath();

            try {

               Runtime.getRuntime().exec(cmd);

            } catch (Exception e) {

               Logger.e(TAG, e.getLocalizedMessage());

            }

            Uri uri = Uri.fromFile(apkFile);

            Intent intent = new Intent(Intent.ACTION_VIEW);

            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

            intent.setDataAndType(uri, "application/vnd.android.package-archive");

            context.startActivity(intent);

         }

      } else if (apkFile.isDirectory()) {

         File[] files = apkFile.listFiles();

         int fileCount = files.length;

         for (int i = 0; i < fileCount; i++) {

            installAPK(context, files[i]);

         }

      }

   }

   /**

    * 安装apk应用

    */

   public static void installDirApk(Context context, String filePath) {

      File file = new File(filePath);

      installAPK(context, file);

   }

   /**

    * 卸载apk文件

    */

   public static void uninstallPackage(Context context, Uri packageUri) {

      Intent intent = new Intent(Intent.ACTION_DELETE, packageUri);

      context.startActivity(intent);

   }

   /**

    * 根据包得到应用信息

    */

   public static ApplicationInfo getApplicationInfoByName(Context context, String packageName) {

      if (null == packageName || "".equals(packageName)) {

         return null;

      }

      try {

         return context.getPackageManager().getApplicationInfo(packageName, PackageManager.GET_UNINSTALLED_PACKAGES);

      } catch (NameNotFoundException e) {

         Logger.e("EspanceUtils", packageName + " NameNotFoundException");

         return null;

      }

   }

   /**

    *  通过包名获取包信息

    */

   public static PackageInfo getPackageInfoByName(Context context, String packageName) {

      if (null == packageName || "".equals(packageName)) {

         return null;

      }

      try {

         return context.getPackageManager().getPackageInfo(packageName, PackageManager.GET_UNINSTALLED_PACKAGES);

      } catch (NameNotFoundException e) {

         Logger.e(TAG, e.getLocalizedMessage());

         return null;

      }

   }

   /**

    * 判断apk包是否安装

    */

   public static boolean isApkIntalled(Context context, String packageName) {

      if (null == getApplicationInfoByName(context, packageName)) {

         return false;

      } else {

         return true;

      }

   }

}