如果有新版本可用，如何在 Android 应用程序中强

问题描述

我正在开发一个应用程序，如果 Play 商店有新版本可用，我想向应用程序用户强制更新，该应用程序应该向用户显示一条对话框消息.

I am working on an application I want to give force update to app users if new version available on play store, the app should show a dialog message to user.

推荐答案

public class ForceUpdateAsync extends AsyncTask<String, String, JSONObject>{

    private String latestVersion;
    private String currentVersion;
    private Context context;
    public ForceUpdateAsync(String currentVersion, Context context){
        this.currentVersion = currentVersion;
        this.context = context;
    }

    @Override
    protected JSONObject doInBackground(String... params) {

        try {
             latestVersion = Jsoup.connect("https://play.google.com/store/apps/details?id="+context.getPackageName()+"&hl=en")
                    .timeout(30000)
                    .userAgent("Mozilla/5.0 (Windows; U; WindowsNT 5.1; en-US; rv1.8.1.6) Gecko/20070725 Firefox/2.0.0.6")
                    .referrer("http://www.google.com")
                    .get()
                    .select("div[itemprop=softwareVersion]")
                    .first()
                     .ownText();

        } catch (IOException e) {
            e.printStackTrace();
        }
        return new JSONObject();
    }

    @Override
    protected void onPostExecute(JSONObject jsonObject) {
        if(latestVersion!=null){
            if(!currentVersion.equalsIgnoreCase(latestVersion)){
               // Toast.makeText(context,"update is available.",Toast.LENGTH_LONG).show();
                if(!(context instanceof SplashActivity)) {
                    if(!((Activity)context).isFinishing()){
                        showForceUpdateDialog();
                    }
                }
            }
        }
        super.onPostExecute(jsonObject);
    }

    public void showForceUpdateDialog(){
        AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(new ContextThemeWrapper(context,
                R.style.DialogDark));

        alertDialogBuilder.setTitle(context.getString(R.string.youAreNotUpdatedTitle));
        alertDialogBuilder.setMessage(context.getString(R.string.youAreNotUpdatedMessage) + " " + latestVersion + context.getString(R.string.youAreNotUpdatedMessage1));
        alertDialogBuilder.setCancelable(false);
        alertDialogBuilder.setPositiveButton(R.string.update, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                context.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + context.getPackageName())));
                dialog.cancel();
            }
        });
        alertDialogBuilder.show();
    }
}

在 string.xml 中你可以像这样添加任何你想要的按摩.

in string.xml you can add whatever massage you want like this.

<string name="youAreNotUpdatedTitle">Update Available</string>
    <string name="youAreNotUpdatedMessage">A new version of YOUR_APP_NAME is available. Please update to versions</string>
    <string name="youAreNotUpdatedMessage1">s now</string>
    <string name="update">Update</string>

请记住，您必须在对话框代码中定义对话框的样式.

remember you have to define the style of your dialog in the dialog code.

现在只需在你的基础活动中编写 forceUpdate() 函数并在 onResume() 方法中调用它，你就完成了！

now just write the forceUpdate() function in your base activity and call it inside onResume() method and you are done!!

// check version on play store and force update
    public void forceUpdate(){
        PackageManager packageManager = this.getPackageManager();
        PackageInfo packageInfo = null;
        try {
            packageInfo =  packageManager.getPackageInfo(getPackageName(),0);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        String currentVersion = packageInfo.versionName;
        new ForceUpdateAsync(currentVersion,BaseActivity.this).execute();
    }

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