bmob的自动升级报空指针

来源：互联网发布：西北大学美工专业编辑：程序博客网时间：2024/06/11 01:05

bmob自然是很好的东西，但是如果你遇到这个，

11-01 09:22:20.880: E/AndroidRuntime(8102): Caused by: java.lang.NullPointerException

11-01 09:22:20.880: E/AndroidRuntime(8102): at cn.bmob.v3.update.UpdateResponse.Code(SourceFile:134)

但是你有没有什么好的解决思路，不如仅仅只是把AppVersion当做一个普通数据，自己做版本对比，利用BmobFile类的下载方法，下载好后自己去安装就好了。

private void testUpdate() {<span style="white-space:pre"></span>PackageManager manager;<span style="white-space:pre"></span>PackageInfo info = null;<span style="white-space:pre"></span>manager = this.getPackageManager();<span style="white-space:pre"></span>try {<span style="white-space:pre"></span>info = manager.getPackageInfo(this.getPackageName(), 0);<span style="white-space:pre"></span>} catch (Exception e) {<span style="white-space:pre"></span>Log.e(TAG, e.getMessage());<span style="white-space:pre"></span>}<span style="white-space:pre"></span>BmobQuery<AppVersion> query = new BmobQuery<AppVersion>();<span style="white-space:pre"></span>query.addWhereGreaterThan("version_i", info.versionCode);<span style="white-space:pre"></span>query.findObjects(this, new FindListener<AppVersion>() {<span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onError(int arg0, String arg1) {<span style="white-space:pre"></span>// TODO Auto-generated method stub<span style="white-space:pre"></span>}<span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onSuccess(List<AppVersion> arg0) {<span style="white-space:pre"></span>AppVersion av = arg0.get(0);<span style="white-space:pre"></span>BmobFile file = av.getPath();<span style="white-space:pre"></span>LogUtil.e(TAG, file.getFilename());<span style="white-space:pre"></span>file.download(LauncherActivity.this,new File("/mnt/sdcard/xxx.apk"),<span style="white-space:pre"></span>new DownloadFileListener() {<span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onFailure(int arg0, String arg1) {<span style="white-space:pre"></span>LogUtil.e(TAG, "新版本下载失败："+arg1);<span style="white-space:pre"></span>}<span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onSuccess(String arg0) {<span style="white-space:pre"></span>LogUtil.e(TAG, arg0);<span style="white-space:pre"></span>installApk();<span style="white-space:pre"></span>}<span style="white-space:pre"></span>});<span style="white-space:pre"></span>}<span style="white-space:pre"></span>});<span style="white-space:pre"></span><span style="white-space:pre"></span>}

private void installApk() {String fileName = "/mnt/sdcard/xxx.apk"; Intent intent = new Intent(Intent.ACTION_VIEW); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);// intent.setDataAndType(Uri.parse("file://"+fileName), "application/vnd.android.package-archive"); intent.setDataAndType(Uri.fromFile(new File(fileName)), "application/vnd.android.package-archive"); startActivityForResult(intent, 1);}

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