您不需要直接强制更新,当您推出更新时,Play 商店实际上会自动为用户更新您的应用程序。除非您更改了权限,否则用户无需执行任何操作。
我绝对会建议让 Play 商店自己做它的事情......但我确实在一个应用中做了类似的事情。
类似这样的内容应该会告诉您 Play 商店的更新日期和版本:
SimpleDateFormat formatter = Dates.getSimpleDateFormat(ctx, "dd MMMM yyyy");
String playUrl = "https://play.google.com/store/apps/details?id=" + appPackageName;
RestClient restClient = /* Some kind of rest client */
try {
String playData = restClient.getAsString(playUrl);
String versionRaw = findPattern(playData, "<([^>]?)*softwareVersion([^>]?)*>([^<]?)*<([^>]?)*>");
String updateRaw = findPattern(playData, "<([^>]?)*datePublished([^>]?)*>([^<]?)*<([^>]?)*>");
Date updated = formatter.parse(updateRaw.replaceAll("<[^>]*>", "").trim());
String version = versionRaw.replaceAll("<[^>]*>", "").trim();
_currentStatus = new PlayStatus(version, updated, new Date());
} catch (Exception e) {
_currentStatus = new PlayStatus(PlayStatus.UNKNOWN_VERSION, new Date(0), new Date(0));
}
我的 PlayStatus 类有如下方法:
public boolean hasUpdate() {
int localVersion = 0;
int playVersion = 0;
if (! versionString.equals(UNKNOWN_VERSION)) {
localVersion = Integer.parseInt(BuildConfig.VERSION_NAME.replace(".",""));
playVersion = Integer.parseInt(versionString.replace(".",""));
}
return (playVersion > localVersion);
}
您显然无法直接更新应用,但如果您确定版本已过期,您可以向用户展示一个 Intent,将其带到 Play 商店:
public static void updateApp(final Activity act) {
final String appPackageName = BuildConfig.APPLICATION_ID;
AlertDialog.Builder builder = new AlertDialog.Builder(act);
builder
.setTitle(act.getString(R.string.dialog_title_update_app))
.setMessage(act.getString(R.string.dialog_google_credentials_message))
.setNegativeButton(act.getString(R.string.dialog_default_cancel), null)
.setPositiveButton(act.getString(R.string.dialog_got_it), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
try {
act.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + appPackageName)));
} catch (ActivityNotFoundException anfe) {
act.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + appPackageName;)));
}
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
我相信这是针对 API 21 编译的,因此可能会对 22 进行一些小调整。