Retrofit+BroadcastReceiver实现App版本更新的功能

前言：

在项目开发过程中一般都有"版本更新"的需求，我们可以根据版本号(versionCode)来判断是否升级，一般每次版本更新，版本号加一。如果获取服务器上的版本号比检测到本程序的版本号高，那么提示升级。

思路：

1.Retrofit+BroadcastReceiver获取服务器的版本号
2.获取当前程序的版本号
3.检测是否更新
4.弹出更新提示的对话框

实现步骤：

1.添加网络和读写权限

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

2.注册BroadcastReceiver, 检查版本更新

@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       //注册BroadcastReceiver
       myReceiver=new NewVersionAppReceiver();
       IntentFilter filter=new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
       registerReceiver(myReceiver, filter);
}

@Override
public void onDestroy() {
       super.onDestroy();
       //反注册BroadcastReceiver
       unregisterReceiver(myReceiver);
}

private class NewVersionAppReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            checkNewVersionApp();//检查版本更新
        }
}

private void checkNewVersionApp(){
        new Handler(getMainLooper()).post(new Runnable() {//新开一条线程,走Retrofit接口
            @Override
            public void run() {
                commonPresenter = new CommonPresenter(MainActivity.this);
                commonPresenter.getNewVersionAPP(); 
            }
        });
}

3.Retrofit实现网络请求获取服务器的versionCode，通过比较服务器的versionCode跟当前App应用程序的versionCode，来判断要不要升级App应用程序。

//Retrofit网络请求成功回调的方法
public void onHttpSuccess(int reqType, Message msg) {
        if (reqType == IHttpService.HTTP_GET_NEW_VERSION_APP) {
            New_version_app newVersionApp = (New_version_app) msg.obj;
            int serviceVersionCode = newVersionApp.getVersionCode();//获取服务器的versionCode
            int currentVersionCode = getCurrentVersionCode(MainActivity.this);
                    if (serviceVersionCode > currentVersionCode) {
                    showNewVersionAppPopWindow();//弹出对话框         
            }
        }
 }

//获取App应用程序的versionCode
private int getCurrentVersionCode(Context ctx) {
        int currentVersion = 0;
        try {
            PackageInfo packageInfo = ctx.getApplicationContext()
                    .getPackageManager()
                    .getPackageInfo(ctx.getPackageName(), 0);
            currentVersion = packageInfo.versionCode;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return currentVersion;
}

4.弹出更新提示的对话框

private void showNewVersionAppPopWindow() {
        if (!isFinishing()) {  //添加这个判断以解决"unable add to window"的问题
            View contentView = LayoutInflater.from(this).inflate(R.layout.pop_check_versionapp, null);
            LinearLayout linearLayout = (LinearLayout) contentView.findViewById(R.id.linearLayout);
            TextView tvTitle = (TextView) contentView.findViewById(R.id.tv_title);
            TextView tvContent = (TextView) contentView.findViewById(R.id.tv_content);
            Button btnLater = (Button) contentView.findViewById(R.id.btn_later);
            Button btnDownload = (Button) contentView.findViewById(R.id.btn_download);

            //Introducing a custom font style.
            tvTitle.setTypeface(Const.font700);
            tvContent.setTypeface(Const.font300);
            btnLater.setTypeface(Const.font700);
            btnDownload.setTypeface(Const.font700);

            //Create and display popWindow
            mListPopWindow2 = new CustomPopWindow.PopupWindowBuilder(this)
                    .setView(contentView)
                    .enableBackgroundDark(true)
                    .setBgDarkAlpha(0.4f)
                    .size(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
                    .create()
                    .showAsDropDown(linearLayout, 0, 20);

            btnLater.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mListPopWindow2.dissmiss();//关闭对话框
                }
            });

            //跳转到Google Play官网去下载APK
            btnDownload.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    final String appPackageName = getPackageName(); 
                    try {
                        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + appPackageName)));
                    } catch (android.content.ActivityNotFoundException anfe) {
                        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + appPackageName)));
                    }
                }
            });

        }
    }

5.在Activity实现的代码

public class MainActivity extends BaseActivity{
    ...
    private CustomPopWindow mListPopWindow2;
    private NewVersionAppReceiver myReceiver;

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //注册BroadcastReceiver
        myReceiver=new NewVersionAppReceiver();
        IntentFilter filter=new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
        registerReceiver(myReceiver, filter);
    }

    ...

   @Override
    public void onDestroy() {
        super.onDestroy();
        //反注册BroadcastReceiver
        unregisterReceiver(myReceiver);
    }

    ...

    @Override
    public void onHttpSuccess(int reqType, Message msg) {//Retrofit请求网络成功回调的方法
        if (reqType == IHttpService.HTTP_GET_NEW_VERSION_APP) {
            New_version_app newVersionApp = (New_version_app) msg.obj;
            int serviceVersionCode = newVersionApp.getVersionCode();//获取服务器的versionCode
            int currentVersionCode = getCurrentVersionCode(MainActivity.this);
                 if (serviceVersionCode > currentVersionCode) {
                    showNewVersionAppPopWindow();//弹出对话框
                 }
         }
    }
    
    //BroadcastReceiver 
    private class NewVersionAppReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            checkNewVersionApp();//检查版本更新
        }
    }
   
    //检查版本更新
    private void checkNewVersionApp(){
        new Handler(getMainLooper()).post(new Runnable() {//新开一条线程，走Retrofit接口
            @Override
            public void run() {
                commonPresenter = new CommonPresenter(MainActivity.this);
                commonPresenter.getNewVersionAPP();
            }
        });
    }

    //弹出对话框的方法
    private void showNewVersionAppPopWindow() {
        if (!isFinishing()) { //解决"unable to add window"问题
            View contentView = LayoutInflater.from(this).inflate(R.layout.pop_check_versionapp, null);
            LinearLayout linearLayout = (LinearLayout) contentView.findViewById(R.id.linearLayout);
            TextView tvTitle = (TextView) contentView.findViewById(R.id.tv_title);
            TextView tvContent = (TextView) contentView.findViewById(R.id.tv_content);
            Button btnLater = (Button) contentView.findViewById(R.id.btn_later);
            Button btnDownload = (Button) contentView.findViewById(R.id.btn_download);

            //Introducing a custom font style.
            tvTitle.setTypeface(Const.font700);
            tvContent.setTypeface(Const.font300);
            btnLater.setTypeface(Const.font700);
            btnDownload.setTypeface(Const.font700);

            //Create and display popWindow
            mListPopWindow2 = new CustomPopWindow.PopupWindowBuilder(this)
                    .setView(contentView)
                    .enableBackgroundDark(true)
                    .setBgDarkAlpha(0.4f)
                    .size(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
                    .create()
                    .showAsDropDown(linearLayout, 0, 20);

            btnLater.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mListPopWindow2.dissmiss();//关闭对话框
                }
            });

            //点击按钮后，跳转到Google Play官网去下载APK
            btnDownload.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    final String appPackageName = getPackageName(); 
                    try {
                        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + appPackageName)));
                    } catch (android.content.ActivityNotFoundException anfe) {
                        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + appPackageName)));
                    }
                }
            });

        }
    }

}

6.总结：本人项目是发布Google Play的，当有新版本需要升级时，客户端会"版本更新"弹出对话框，用户点击下载的按钮直接跳转到Google Play官网去下载APK就可以。App版本更新的功能已经实现，欢迎大家围观，如果有什么疑问的话，可以留言联系我哦！