里面有题

来源：互联网发布：net snmp windows 64 编辑：程序博客网时间：2024/04/26 02:47
点击条目弹出AlertDialog(如图2中的选择网络)(15分)
4.选择wifi就直接弹出AlertDialog(如图2中的版本更新)(10分)
5.选择手机流量提醒用户跳转到设置wifi页面(10分)
6.点击版本更新中的确定后使用Xutils3.0根据数据中的url下载apk进行安装(图3)(15分)
7.将下载的apk存储到sdcard中(10分)
public class MainActivity extends AppCompatActivity implements XListView.IXListViewListener {    private XListView xlistview;    private boolean flag=false;    private myadapter adapter;    private int index=1;    private ProgressDialog progressDialog;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        xlistview = (XListView) findViewById(R.id.xlv);        xlistview.setPullLoadEnable(true);        xlistview.setXListViewListener(this);        read();    }    private void read(){        String url="http://api.jisuapi.com/news/get";        RequestParams params=new RequestParams(url);        params.addBodyParameter("channel","新闻");        params.addBodyParameter("start","0");        params.addBodyParameter("num","10");        params.addBodyParameter("appkey","f687e2d75601ac18");        x.http().post(params, new Callback.CommonCallback<String>() {            @Override            public void onSuccess(String result) {                Gson gson=new Gson();                MenuInfo menuInfo = gson.fromJson(result, MenuInfo.class);                List<MenuInfo.ResultBean.ListBean> list = menuInfo.getResult().getList();                if (adapter==null){                    adapter = new myadapter(list);                    xlistview.setAdapter(adapter);                }else {                    adapter.morde(list,flag);                    adapter.notifyDataSetChanged();                }            }            @Override            public void onError(Throwable ex, boolean isOnCallback) {            }            @Override            public void onCancelled(CancelledException cex) {            }            @Override            public void onFinished() {            }        });    }    @Override    public void onRefresh() {        ++index;        read();        flag=true;        xlistview.stopRefresh(true);    }    @Override    public void onLoadMore() {        ++index;        read();        flag=false;        xlistview.stopLoadMore();    }    class myadapter extends BaseAdapter{       private List<MenuInfo.ResultBean.ListBean> list;        public myadapter(List<MenuInfo.ResultBean.ListBean> list) {            this.list = list;        }        private void morde(List<MenuInfo.ResultBean.ListBean> lists,boolean flag){            for (MenuInfo.ResultBean.ListBean bean :                    lists) {                if (flag) {                    list.add(0, bean);                }else {                    list.add(bean);                }            }        }        @Override        public int getCount() {            return list!=null?list.size():0;        }        @Override        public Object getItem(int position) {            return list.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            viewholder vh=null;            if (convertView==null){                vh=new viewholder();                convertView=convertView.inflate(MainActivity.this,R.layout.xlistview,null);                vh.textView = (TextView) convertView.findViewById(R.id.tv);                convertView.setTag(vh);            }else {                vh= (viewholder) convertView.getTag();            }            vh.textView.setText(list.get(position).getSrc());           点击跳转 xlistview.setOnItemClickListener(new AdapterView.OnItemClickListener() {                @Override                public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                   new AlertDialog.Builder(MainActivity.this)                   .setIcon(R.mipmap.ic_launcher)                   .setTitle("网络选择")                   .setSingleChoiceItems(new String[]{"wife", "手机流量"}, 2, new DialogInterface.OnClickListener() {                                @Override                     public void onClick(DialogInterface dialog, int which) {                         switch (which){                          case 0:选择wife                              new AlertDialog.Builder(MainActivity.this)                              .setTitle("版本更新")                              .setMessage("现在检测到新版本,是否更新？")                圆圈属性      .setPositiveButton("确定", new DialogInterface.OnClickListener() {                              @Override                              public void onClick(DialogInterface dialog, int which) {                                       downloadApk();                                 }                                 })                                .setNegativeButton("取消",null)                                .create().show();                                            break;                            case 1:选择手机流量                            Toast.makeText(MainActivity.this,"跳到wife界面",Toast.LENGTH_SHORT).show();                            Intent intent=new Intent();                            intent.setAction("android.settings.WIRELESS_SETTINGS");                            startActivity(intent);                             break;                                    }                                }                            }).setNegativeButton("取消", null)                            .show();;                }            });            return convertView;        }    }    class viewholder{        TextView textView;    }Apk下载    private void downloadApk() {        String url = "http://gdown.baidu.com/data/wisegame/f98d235e39e29031/baiduxinwen.apk";        String path = Environment.getExternalStorageDirectory().getPath() + "/teme1/myapk.apk";        File file = new File(path);        File parentFile = file.getParentFile();        if (!parentFile.exists()) {            parentFile.mkdir();        }        RequestParams params = new RequestParams(url);        params.setAutoRename(false);        params.setAutoResume(true);        //设置保存路径        params.setSaveFilePath(path);        x.http().get(params, new Callback.ProgressCallback<File>() {            @Override            public void onSuccess(File result) {                installDownloadApk(result);            }            @Override            public void onError(Throwable ex, boolean isOnCallback) {            }            @Override            public void onCancelled(CancelledException cex) {            }            @Override            public void onFinished() {                cancleProgressDialog();            }            @Override            public void onWaiting() {            }            @Override            public void onStarted() {                showProgressDialog();            }            @Override            public void onLoading(long total, long current, boolean isDownloading) {                int progress = (int) (current / total * 100);                if (progress >= 0 && progress <= 100) {                    updataProgressDialog(progress);                }            }        });    }    //安卓开发 apk安装    private void installDownloadApk(File result) {        Intent intent = new Intent(Intent.ACTION_VIEW);        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        intent.setDataAndType(Uri.fromFile(result), "application/vnd.android.package-archive");        startActivity(intent);    }    private void cancleProgressDialog() {        if (progressDialog == null) {            return;        }        if (progressDialog.isShowing()) {            progressDialog.dismiss();        }    }    private void updataProgressDialog(int progress) {        if (progressDialog == null) {            return;        }        progressDialog.setProgress(progress);    }    private void showProgressDialog() {        progressDialog = new ProgressDialog(this);        //设置progressDialog显示样式        progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);        progressDialog.setMessage("我正在下载东西");        progressDialog.setTitle("请等待");        progressDialog.setProgress(0);        progressDialog.show();    }}
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