Android采用pm命令静默卸载应用

卸载app的方式有多种，可以直接调用android系统的卸载程序，但是这样会调出android卸载提示框，问题就是真的不好看。

所以采用静默卸载的方式，避免弹出系统提示框。

方法一（调用系统卸载程序）：

 //卸载应用
             Uri packageURI = Uri.parse("package:" + pkgName);
             Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);
             startActivity(uninstallIntent);

方法二（静默安装）：

  /**
      * 卸载应用入口提示
      *
      * @param position app在列表中的位置
      * @param mData app列表
      */
     public void startUninstall(int position, List<AppInfoModel> mData) {

         //获取应用程序包名
         String pkg = mData.get(position).packageName;
         //判断此应用程序是否存在
         Boolean pkgExist;
         pkgExist = appExist(mContext,pkg);
         if (!pkgExist) {
             Toast.makeText(mContext, "程序未安装", Toast.LENGTH_SHORT).show();
         } else {
             //静默卸载
             Boolean uninstallSuccess = uninstall(pkg);
             if (uninstallSuccess){
                 Toast.makeText(mContext, "卸载成功", Toast.LENGTH_SHORT).show();
             } else {
                 Toast.makeText(mContext, "卸载失败", Toast.LENGTH_SHORT).show();
             }
         }

     }

     /**
      * 静默卸载App
      *
      * @param packageName 包名
      * @return 是否卸载成功
      */
     private static boolean uninstall(String packageName) {
         Process process = null;
         BufferedReader successResult = null;
         BufferedReader errorResult = null;
         StringBuilder successMsg = new StringBuilder();
         StringBuilder errorMsg = new StringBuilder();
         try {
             process = new ProcessBuilder("pm", "uninstall", packageName).start();
             successResult = new BufferedReader(new InputStreamReader(process.getInputStream()));
             errorResult = new BufferedReader(new InputStreamReader(process.getErrorStream()));
             String s;
             while ((s = successResult.readLine()) != null) {
                 successMsg.append(s);
             }
             while ((s = errorResult.readLine()) != null) {
                 errorMsg.append(s);
             }
         } catch (Exception e) {
             KLog.d("e = " + e.toString());
         } finally {
             try {
                 if (successResult != null) {
                     successResult.close();
                 }
                 if (errorResult != null) {
                     errorResult.close();
                 }
             } catch (Exception e) {
                 KLog.d("Exception : " + e.toString());
             }
             if (process != null) {
                 process.destroy();
             }
         }
         //如果含有"success"单词则认为卸载成功
         return successMsg.toString().equalsIgnoreCase("success");
     }

     /**
      * 判断应用是否存在
      *
      * @param context       上下文
      * @param packageName   包名
      * @return  是否存在
      */
     private boolean appExist(Context context, String packageName) {
         try {
             List<PackageInfo> packageInfoList = context.getPackageManager().getInstalledPackages(0);
             for (PackageInfo packageInfo : packageInfoList) {
                 if (packageInfo.packageName.equalsIgnoreCase(packageName)) {
                     return true;
                 }
             }
         } catch (Exception e) {
             KLog.d(e.toString());
         }
         return false;
     }