Android meta-data代码中调用

在AndroidManifest中先需要<meta-data>对name,value进行初步设置

try {    ApplicationInfo appInfo = ctx.getPackageManager().getApplicationInfo(ctx.getPackageName(),            PackageManager.GET_META_DATA);    String value = appInfo.metaData.getString(key);    return value;} catch (PackageManager.NameNotFoundException e) {    e.printStackTrace();}