publicstaticvoidInstall(Context?ctx,?String?strLocalFile)?{

Intent?intentInstall=newIntent();

String?apkPath="/data/data/"+ctx.getPackageName()+"/files";

String?apkName="yuan.apk";

File?file=newFile(apkPath,?apkName);try{

//assets下對于超過2M 的文件，有所限制，建議改名為Jpg

InputStream?is=ctx.getAssets().open("yuan.apk");if(!file.exists())?{

file.createNewFile();

FileOutputStream?os=ctx.openFileOutput(file.getName(),

Context.MODE_WORLD_WRITEABLE);byte[]?bytes=newbyte[512];inti=-1;while((i=is.read(bytes))>0)?{

os.write(bytes);

}

os.close();

is.close();

Log.e("","-----------?has?been?copy?to");

}else{

Log.e("","-----------cunzai");

}

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.e("",?e.toString());

}

Log.e("","fl--"+file.getName()+"-dd---"+file.getAbsolutePath()+"-pa-"+file.getPath());

intentInstall.setAction(android.content.Intent.ACTION_VIEW);

intentInstall.setDataAndType(Uri.fromFile(file),"application/vnd.android.package-archive");

intentInstall.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

ctx.startActivity(intentInstall);

}

當然代碼大部分參考其他人的，請見諒

同時請參考

http://ccsosnfs.iteye.com/blog/1390405