apk里安装apk

假设在A apk中放入 B apk，在A apk安装运行后，要安装 B apk

将B apk放在raw目录。

将B apk拷贝至 /data/data/A apk的包名/files

设置B apk的权限。

通过系统安装器安装。

Java代码  String apkPath = "/data/data/" + getPackageName() + "/files";  
String apkName = "b.apk";  
File file = new File(apkPath,apkName);  
  
try  
{  
                InputStream is = getResources().openRawResource(R.raw.b);  
  
                if(!file.exists())  
                {  
                    file.createNewFile();  
  
                    FileOutputStream os = openFileOutput(file.getName(), Context.MODE_WORLD_WRITEABLE);  
  
                    byte[] bytes = new byte[512];  
                    int i = -1;  
                    while((i = is.read(bytes))>0)  
                    {  
                        os.write(bytes);  
                    }  
  
                    os.close();  
                    is.close();  
                    Log.d(LOG_TAG, apkName + " has been copy to " + apkPath);  
                };  
  
                String permission="666";  
  
                try  
                {  
                    String command = "chmod " + permission + " " + apkPath + "/" + apkName;  
                    Runtime runtime = Runtime.getRuntime();  
                    runtime.exec(command);  
                }  
                catch (IOException e)  
                {  
                    e.printStackTrace();  
                }  
  
            }  
            catch(Exception e)  
            {  
                Log.d(LOG_TAG, e.toString());  
                finish();  
            }  
  
            Intent intent = new Intent();  
            intent.setAction(android.content.Intent.ACTION_VIEW);  
            intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");  
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  
            startActivity(intent);  

如果apk文件过大，如下

http://www.hfdigg.com/SrcShow.asp?Src_ID=10092

android raw文件夹下.db后缀文件大于1M时，拷贝时将会出现：DEBUG/asset(725): Data exceeds UNCOMPRESS_DATA_MAX (1662976 vs 1048576)

出现这个问题的原因是，assetsManager 无法处理大于1M的文件的压缩和解压。
但以下文件类型，因为是已经压缩过的，不会进行压缩处理，如下：
/* these formats are already compressed, or dont compress well /
static const char kNoCompressExt[] = {
".jpg", ".jpeg", ".png", ".gif",
".wav", ".mp2", ".mp3", ".ogg", ".aac",
".mpg", ".mpeg", ".mid", ".midi", ".smf", ".jet",
".rtttl", ".imy", ".xmf", ".mp4", ".m4a",
".m4v", ".3gp", ".3gpp", ".3g2", ".3gpp2",
".amr", ".awb", ".wma", ".wmv"
};
【解决办法】将Sqlite db文件，先改名为.jpg文件，放在assets中，然后在程序第一次启动时，改名拷贝到/data/data