版本更新

package com.example.longfei.monthexam;

import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.util.Xml;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

import com.lidroid.xutils.HttpUtils;
import com.lidroid.xutils.exception.HttpException;
import com.lidroid.xutils.http.ResponseInfo;
import com.lidroid.xutils.http.callback.RequestCallBack;
import com.lidroid.xutils.http.client.HttpRequest;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {


    //获取Xml
    private List<User> data = new ArrayList<>();
    //获取版本
    private List<Version> aa = new ArrayList<>();
    private String path = "http://www.oschina.net/action/api/news_list?catalog=1&pageIndex=0&pageSize=20";
    private String path1 = "http://www.oschina.net/MobileAppVersion.xml";
    private Button button;
    private ListView listView;
    private BaseAdapter mAdapter;
    private User mUser;
    private Version mVersion;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        button = (Button) findViewById(R.id.button);
        button.setOnClickListener(this);


        listView = (ListView) findViewById(R.id.listView);

        getVersion();
        getHttp();

        mAdapter = new BaseAdapter() {
            @Override
            public int getCount() {
                return data.size();
            }

            @Override
            public Object getItem(int position) {
                return data.get(position);
            }

            @Override
            public long getItemId(int position) {
                return position;
            }

            @Override
            public View getView(int position, View convertView, ViewGroup parent) {

                convertView = LayoutInflater.from(MainActivity.this).inflate(R.layout.item, null);

                TextView title = (TextView) convertView.findViewById(R.id.title);
                TextView context = (TextView) convertView.findViewById(R.id.context);
                TextView date = (TextView) convertView.findViewById(R.id.date);

                User user = data.get(position);
                title.setText(user.getTitle());
                context.setText(user.getBody());
                date.setText(user.getPubDate());
                return convertView;
            }
        };
        listView.setAdapter(mAdapter);
    }

    private void getVersion() {

        HttpUtils utils = new HttpUtils();
        utils.send(HttpRequest.HttpMethod.GET, path1, new RequestCallBack<String>() {
            @Override
            public void onSuccess(ResponseInfo<String> responseInfo) {

                System.out.println(responseInfo.result.toString());
                getVersionCode(responseInfo.result.toString());
                mAdapter.notifyDataSetChanged();
            }

            @Override
            public void onFailure(HttpException e, String s) {

            }
        });

    }

    private void getVersionCode(String s) {

        try {
            XmlPullParser pullParser = Xml.newPullParser();

            ByteArrayInputStream stream = new ByteArrayInputStream(s.getBytes());

            pullParser.setInput(stream, "utf-8");
            int type = pullParser.getEventType();
            while (type != XmlPullParser.END_DOCUMENT) {
                String name = pullParser.getName();
                switch (type) {
                    case XmlPullParser.START_DOCUMENT:
                        break;
                    case XmlPullParser.START_TAG:

                        if (name.equals("android")) {
                            mVersion = new Version();
                        } else if (name.equals("versionCode")) {
                            mVersion.setVersionCode(pullParser.nextText());
                        } else if (name.equals("versionName ")) {
                            mVersion.setVersionName(pullParser.nextText());
                        } else if (name.equals("downloadUrl")) {
                            mVersion.setDownloadUrl(pullParser.nextText());
                        } else if (name.equals("updateLog")) {
                            mVersion.setUpdateLog(pullParser.nextText());
                        }
                        break;
                    case XmlPullParser.END_TAG:
                        if (name.equals("android")) {
                            aa.add(mVersion);
                        }
                        break;
                }
                type = pullParser.next();
            }
        } catch (XmlPullParserException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void getHttp() {

        HttpUtils utils = new HttpUtils();
        utils.send(HttpRequest.HttpMethod.GET, path, new RequestCallBack<String>() {
            @Override
            public void onSuccess(ResponseInfo<String> responseInfo) {

                getXMl(responseInfo.result.toString());
                mAdapter.notifyDataSetChanged();
            }

            @Override
            public void onFailure(HttpException e, String s) {

            }
        });

    }

    private void getXMl(String s) {

        try {
            XmlPullParser pullParser = Xml.newPullParser();

            ByteArrayInputStream stream = new ByteArrayInputStream(s.getBytes());

            pullParser.setInput(stream, "utf-8");
            int type = pullParser.getEventType();

            while (type != XmlPullParser.END_DOCUMENT) {

                String name = pullParser.getName();
                switch (type) {

                    case XmlPullParser.START_DOCUMENT:

                        break;
                    case XmlPullParser.START_TAG:

                        if (name.equals("news")) {
                            mUser = new User();
                        } else if (name.equals("title")) {
                            mUser.setTitle(pullParser.nextText());
                        } else if (name.equals("body")) {
                            mUser.setBody(pullParser.nextText());
                        } else if (name.equals("pubDate")) {
                            mUser.setPubDate(pullParser.nextText());
                        }
                        break;
                    case XmlPullParser.END_TAG:

                        if (name.equals("news")) {
                            data.add(mUser);
                        }
                        break;
                }
                type = pullParser.next();
            }
        } catch (XmlPullParserException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onClick(View v) {


        switch (v.getId()) {

            case R.id.button:
                showDialog();
                break;
        }
    }


    private void showDialog() {
        AlertDialog dialog = new AlertDialog.Builder(MainActivity.this)
                .setMessage(aa.get(0).getUpdateLog())
                .setTitle("软件版本更新").setPositiveButton("立即更新", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                downLoadApk();
                            }
                        }
                ).setNegativeButton("下次再说", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                    }
                })
                .create();
        dialog.show();

    }

    private void downLoadApk() {

        final ProgressDialog pd;    //进度条对话框
        pd = new ProgressDialog(this);
        pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        pd.setMessage("正在下载更新");
        pd.show();
        new Thread() {
            @Override
            public void run() {
                try {
                    File file = getFileFromServer(aa.get(0).getDownloadUrl(), pd);
                    sleep(3000);
                    installApk(file);
                    pd.dismiss(); //结束掉进度条对话框
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }.start();
    }


    //安装apk
    protected void installApk(File file) {
        Intent intent = new Intent();
        //执行动作
        intent.setAction(Intent.ACTION_VIEW);
        //执行的数据类型
        intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
        startActivity(intent);
    }

    public static File getFileFromServer(String path, ProgressDialog pd) throws Exception {
        //如果相等的话表示当前的sdcard挂载在手机上并且是可用的
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            URL url = new URL(path);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(5000);
            //获取到文件的大小
            pd.setMax(conn.getContentLength());
            InputStream is = conn.getInputStream();


            File file = new File(Environment.getExternalStorageDirectory(), "updata.apk");


            FileOutputStream fos = new FileOutputStream(file);

            BufferedInputStream bis = new BufferedInputStream(is);

            byte[] buffer = new byte[1024];
            int len;
            int total = 0;

            int read = is.read(buffer);

            while ((len = bis.read(buffer)) != -1) {
                fos.write(buffer, 0, len);
                total += len;
                //获取当前下载量
                pd.setProgress(total);
            }
            fos.close();
            bis.close();
            is.close();
            return file;
        } else {
            return null;
        }
    }
}

//User

package com.example.longfei.monthexam;

/**
 * Created by longfei on 2016/8/24.
 */
public class User {


    private String title;
    private String body;
    private String pubDate;

    @Override
    public String toString() {
        return "User{" +
                "title='" + title + '\'' +
                ", body='" + body + '\'' +
                ", pubDate='" + pubDate + '\'' +
                '}';
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getBody() {
        return body;
    }

    public void setBody(String body) {
        this.body = body;
    }

    public String getPubDate() {
        return pubDate;
    }

    public void setPubDate(String pubDate) {
        this.pubDate = pubDate;
    }

    public User() {
    }

    public User(String title, String body, String pubDate) {
        this.title = title;
        this.body = body;
        this.pubDate = pubDate;
    }
}

//Verson

package com.example.longfei.monthexam;

/**
 * Created by longfei on 2016/8/24.
 */
public class Version {

    private String versionCode;
    private String versionName;

    private String downloadUrl;
    private String updateLog;

    @Override
    public String toString() {
        return "Version{" +
                "versionCode='" + versionCode + '\'' +
                ", versionName='" + versionName + '\'' +
                ", downloadUrl='" + downloadUrl + '\'' +
                ", updateLog='" + updateLog + '\'' +
                '}';
    }

    public String getVersionCode() {
        return versionCode;
    }

    public void setVersionCode(String versionCode) {
        this.versionCode = versionCode;
    }

    public String getVersionName() {
        return versionName;
    }

    public void setVersionName(String versionName) {
        this.versionName = versionName;
    }

    public String getDownloadUrl() {
        return downloadUrl;
    }

    public void setDownloadUrl(String downloadUrl) {
        this.downloadUrl = downloadUrl;
    }

    public String getUpdateLog() {
        return updateLog;
    }

    public void setUpdateLog(String updateLog) {
        this.updateLog = updateLog;
    }

    public Version() {
    }

    public Version(String versionCode, String versionName, String downloadUrl, String updateLog) {
        this.versionCode = versionCode;
        this.versionName = versionName;
        this.downloadUrl = downloadUrl;
        this.updateLog = updateLog;
    }
}