Android使用静默安装时碰见的问题

升级时碰见的异常

private void installPackage(String appName,final File apk) {
        if (!apk.exists()) {
            setHasNewVersion(appName,false);
            hideProgressDialog();
            return;
        }
        apk.setReadable(true, false);
        apk.setExecutable(true, false);

        //走完installPackage之后就结束了，回调observer内的代码是异步执行了
        final PackageManager pm = getPackageManager();
        PackageInstallObserver observer = new PackageInstallObserver(appName);
        Log.i(TAG, "install the apk begin : "+appName+";;getAbsolutePath="+apk.getAbsolutePath());
        pm.installPackage(
                Uri.parse("file://" + apk.getAbsolutePath()), observer,
                PackageManager.INSTALL_REPLACE_EXISTING, null);
    }

private class PackageInstallObserver extends IPackageInstallObserver.Stub {
        private String appname;
        public PackageInstallObserver(String appName) {
            appname=appName;
        }

        public void packageInstalled(final String packageName, int returnCode) {
            setHasNewVersion(appname,false);
            String appPath = getFilesDir().getAbsolutePath()+"/apps/"+appname+".apk";
            File apk = new File(getFilesDir(), appname+".apk");

            Log.i(TAG, "install is end and delete "+apk.getAbsoluteFile());
            apk.delete();
            hideProgressDialog();
            if(returnCode==){
                installReturnCode=;
            }else{
                if(returnCode<){
                    installReturnCode=returnCode;
                }else{
                    installReturnCode=-;
                }
            }
            Log.i(TAG, "installReturnCode "+installReturnCode+"; packageName = "+packageName);
            new Thread(){
                public void run() {
                    postUpdateResult(packageName,appname,installReturnCode);//安装成功
                };
            }.start();
        }
    }

异常

W/asset ( 1245): Asset path /data/data/com.****.******/files/apps/pjlauncher.apk is neither a directory nor file (type=0).
W/DefContainer( 1245): Failed to parse package
W/ActivityManager( 535): No content provider found for permission revoke: file:///data/data/com.****.***/files/apps/*****.apk
D/dalvikvm( 535): GC_EXPLICIT freed 573K, 24% free 4589K/6028K, paused 2ms+3ms, total 35ms

I/AppUpgradeService( 1227): install is end and delete /data/data/com.****.******/files/apps/*****.apk

查了好半天有说是要添加权限的，有说是要在使用时给apk修改权限的，试了半天都没有效果。

最后修改了apk文件的下载存放路径，结果安装成功。

* 如果apk下载到这个目录/data/data/com.****.******/files/apps
* 会出现No content provider found for permission这个异常
* 如果是这个目录/data/data/com.****.******/files
* 则没有问题

感觉很奇怪我在其他机顶盒上测试的时候，即使是在/data/data/com.****.******/files/apps这个目录也可以顺利安装apk，但是换了一台机顶盒之后就不可以了

可能是不同机顶盒系统有差异吧！

ps：这个功能需要进行系统签名，以及配置android:sharedUserId="android.uid.system"