安卓版本更新

MainActivity.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.bwei.versionupdata.MainActivity">

    <TextView
        android:padding="10dp"
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="25sp"
        android:id="@+id/tv_versionName"
        android:text="我是1.0版本"
        />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="检测更新"
        android:onClick="checkVersion"
        android:layout_below="@+id/tv_versionName"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

</RelativeLayout>

Api

public class Api {

    public static String URL="https://www.zhaoapi.cn/version/";
}

appservice

import retrofit2.http.GET;
import retrofit2.http.Query;
import rx.Observable;

/**
 * Created by lenovo on 2018/4/20.
 */

public interface AppService {

    @GET("getVersion")
    Observable<IBean> getIBean(@Query("type") String type);

}

Bean

public class IBean {

    /**
     * code : 0
     * data : {"apkUrl":"https://www.zhaoapi.cn/version/101.apk","type":0,"vId":1,"versionCode":"101","versionName":"1.0.1"}
     * msg : 获取版本信息成功
     */

    private String code;
    private DataBean data;
    private String msg;

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public DataBean getData() {
        return data;
    }

    public void setData(DataBean data) {
        this.data = data;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public static class DataBean {
        /**
         * apkUrl : https://www.zhaoapi.cn/version/101.apk
         * type : 0
         * vId : 1
         * versionCode : 101
         * versionName : 1.0.1
         */

        private String apkUrl;
        private int type;
        private int vId;
        private String versionCode;
        private String versionName;

        public String getApkUrl() {
            return apkUrl;
        }

        public void setApkUrl(String apkUrl) {
            this.apkUrl = apkUrl;
        }

        public int getType() {
            return type;
        }

        public void setType(int type) {
            this.type = type;
        }

        public int getVId() {
            return vId;
        }

        public void setVId(int vId) {
            this.vId = vId;
        }

        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;
        }
    }
}

model

public class IModel {

    public interface OnListener{
        void OnSucces(IBean iBean);
    }
    OnListener onListener;
    public void setOnListener(OnListener onListener){
        this.onListener=onListener;
    }

    public void getModel(String type){
        Retrofit retrofit=new Retrofit.Builder().baseUrl(Api.URL)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .build();
        AppService appService = retrofit.create(AppService.class);
        Observable<IBean> iBean = appService.getIBean(type);
        iBean.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer<IBean>() {
                    @Override
                    public void onCompleted() {

                    }

                    @Override
                    public void onError(Throwable e) {

                    }

                    @Override
                    public void onNext(IBean iBean) {
                        if(onListener!=null){
                            onListener.OnSucces(iBean);

                        }
                    }
                });


    }

}

presenter

public class IPresenter {

    IModel iModel;
    IView iView;

    public IPresenter(IView iView) {
        this.iView = iView;
        iModel=new IModel();
    }
    public void getPresenter(String type){
        iModel.getModel(type);
        iModel.setOnListener(new IModel.OnListener() {
            @Override
            public void OnSucces(IBean iBean) {
                iView.OnSucces(iBean);
            }
        });

    }
}

view

public interface IView {
    void OnSucces(IBean iBean);
}

MainActivity

public class MainActivity extends AppCompatActivity implements IView {

    /**
     * 版本信息
     */
    private TextView mTvVersionName;
    private IBean.DataBean data;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        IPresenter iPresenter = new IPresenter(this);
        iPresenter.getPresenter("2");
    }


    @Override
    public void OnSucces(IBean iBean) {
        data = iBean.getData();

    }

    private String getVersionName() throws Exception {
        //获取packagemanager的实例
        PackageManager packageManager = getPackageManager();
        //getPackageName()是你当前类的包名，0代表是获取版本信息
        PackageInfo packInfo = packageManager.getPackageInfo(getPackageName(), 0);
        Log.e("TAG", "版本号" + packInfo.versionCode);
        Log.e("TAG", "版本名" + packInfo.versionName);
        return packInfo.versionName;
    }

    private int getVersionCode() throws Exception {
        //获取packagemanager的实例
        PackageManager packageManager = getPackageManager();
        //getPackageName()是你当前类的包名，0代表是获取版本信息
        PackageInfo packInfo = packageManager.getPackageInfo(getPackageName(), 0);
        Log.e("TAG", "版本号" + packInfo.versionCode);
        Log.e("TAG", "版本名" + packInfo.versionName);
        return packInfo.versionCode;
    }


    private void initView() {
        mTvVersionName = (TextView) findViewById(R.id.tv_versionName);
    }

    public void checkVersion(View view) throws Exception {
        //如果检测本程序的版本号小于服务器的版本号，那么提示用户更新

        if (getVersionCode() < Integer.valueOf(data.getVersionCode())) {
            showDialogUpdate();//弹出提示版本更新的对话框

        } else {
            //否则吐司，说现在是最新的版本
            Toast.makeText(this, "当前已经是最新的版本", Toast.LENGTH_SHORT).show();

        }
    }

    private void showDialogUpdate() {
        // 这里的属性可以一直设置，因为每次设置后返回的是一个builder对象
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        // 设置提示框的标题
        builder.setTitle("版本升级").
                // 设置提示框的图标
                        setIcon(R.mipmap.ic_launcher).
                // 设置要显示的信息
                        setMessage("发现新版本！请及时更新").
                // 设置确定按钮
                        setPositiveButton("确定", new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        //Toast.makeText(MainActivity.this, "选择确定哦", 0).show();
                        loadNewVersionProgress();//下载最新的版本程序
                    }
                }).

                // 设置取消按钮,null是什么都不做，并关闭对话框
                        setNegativeButton("取消", null);

        // 生产对话框
        AlertDialog alertDialog = builder.create();
        // 显示对话框
        alertDialog.show();
    }


    private void loadNewVersionProgress() {
        //  final   String uri="http://www.apk.anzhi.com/data3/apk/201703/14/4636d7fce23c9460587d602b9dc20714_88002100.apk";
        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();
        //启动子线程下载任务
        new Thread() {
            @Override
            public void run() {
                try {
                    File file = getFileFromServer(data.getApkUrl(), pd);
                    sleep(3000);
                    installApk(file);
                    pd.dismiss(); //结束掉进度条对话框
                } catch (Exception e) {
                    //下载apk失败
                    Toast.makeText(getApplicationContext(), "下载新版本失败", Toast.LENGTH_LONG).show();
                    e.printStackTrace();
                }
            }
        }.start();
    }


    public static File getFileFromServer(String uri, 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(uri);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(5000);
            //获取到文件的大小
            pd.setMax(conn.getContentLength());
            InputStream is = conn.getInputStream();
            long time = System.currentTimeMillis();//当前时间的毫秒数
            File file = new File(Environment.getExternalStorageDirectory(), time + "updata.apk");
            FileOutputStream fos = new FileOutputStream(file);
            BufferedInputStream bis = new BufferedInputStream(is);
            byte[] buffer = new byte[1024];
            int len;
            int total = 0;
            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;
        }
    }

    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);
    }
}

权限

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

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