Android使用靜默安裝時碰見的問題

升級時碰見的異常

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之後就結束了，回調observer內的代碼是非同步執行了
        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==1){
                installReturnCode=3;
            }else{
                if(returnCode<0){
                    installReturnCode=returnCode;
                }else{
                    installReturnCode=-123455;
                }
            }
            Log.i(TAG, "installReturnCode "+installReturnCode+"; packageName = "+packageName);
            new Thread(){
                public void run() {
                    postUpdateResult(packageName,appname,installReturnCode);//安裝成功
                };
            }.start();
        }
    }

異常

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

查了好半天有說是要添加許可權的，有說是要在使用時給apk修改許可權的，試了半天都沒有效果。

最後修改了apk文件的下載存放路徑，結果安裝成功。

* 如果apk下載到這個目錄/data/data/com.****.******/files/apps
* 會出現No content provider found for permission這個異常
* 如果是這個目錄/data/data/com.****.******/files
* 則沒有問題

感覺很奇怪我在其他機頂盒上測試的時候，即使是在/data/data/com.****.******/files/apps這個目錄也可以順利安裝apk，但是換了一臺機頂盒之後就不可以了

可能是不同機頂盒系統有差異吧！

ps：這個功能需要進行系統簽名，以及配置android:sharedUserId="android.uid.system"