Android Utililty Methods Context Get

List of utility methods to do Context Get

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Description

The list of methods to do Context Get are organized into topic(s).

Method

StringgetApp(Context ctx, String packageName)
get App 
JSONObject json = new JSONObject();
try {
    PackageManager pm = ctx.getPackageManager();
    Intent it = new Intent("android.intent.action.MAIN"); 
    it.addCategory(Intent.CATEGORY_LAUNCHER);
    List<ResolveInfo> acts = pm.queryIntentActivities(it, 0);
    int actsSize = acts.size();
    List<ApplicationInfo> allApps = pm.getInstalledApplications(0);
...
StringgetAppKey(Context context)
get App Key 
Bundle metaData = null;
String appKey = null;
try {
    ApplicationInfo ai = context.getPackageManager()
            .getApplicationInfo(context.getPackageName(),
                    PackageManager.GET_META_DATA);
    if (null != ai)
        metaData = ai.metaData;
...
intgetAppVersion(Context context)
get App Version 
try {
    PackageInfo packageInfo = context.getPackageManager()
            .getPackageInfo(context.getPackageName(),
                    PackageManager.PERMISSION_GRANTED);
    return packageInfo.versionCode;
} catch (PackageManager.NameNotFoundException e) {
    throw new RuntimeException("Could not get package name: " + e);
ListgetApplicationInfos(Context context)
get Application Infos 
PackageManager pManager = context.getApplicationContext()
        .getPackageManager();
return pManager
        .getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES);
intgetApplicationMemoryClass(@Nonnull Context context)
Returns the upper memory usage limit in bytes for the current application retrieved from ActivityManager#getMemoryClass() . 
final ActivityManager manager = (ActivityManager) context
        .getSystemService(Context.ACTIVITY_SERVICE);
return manager.getMemoryClass() * 1024 * 1024;
StringgetApplicationMetaData(Context context, String key)
get Application Meta Data 
String data = null;
ApplicationInfo info = null;
try {
    info = context.getPackageManager().getApplicationInfo(
            context.getPackageName(), PackageManager.GET_META_DATA);
} catch (NameNotFoundException e) {
    e.printStackTrace();
if (info != null && info.metaData != null
        && info.metaData.get(key) != null) {
    data = info.metaData.get(key).toString();
return data;
StringgetApplicationName(Context ctx)
Finds current application name 
ApplicationInfo ai;
try {
    Context appContext = ctx.getApplicationContext();
    assert appContext != null;
    final PackageManager pm = appContext.getPackageManager();
    assert pm != null;
    ai = pm.getApplicationInfo(ctx.getPackageName(), 0);
    return (String) (ai != null ? pm.getApplicationLabel(ai)
...
InputStreamgetAsset(@Nonnull Context context, @Nonnull String path)
Returns the InputStream of the given path file using the passed context to retrieve the AssetManager . 
AssetManager manager = context.getAssets();
return manager.open(path);
InputStreamgetAsset(@Nonnull Context context, @Nonnull String path)
Returns the InputStream of the given path file using the passed context to retrieve the AssetManager . 
return context.getAssets().open(path);
StringgetAuthorityFromPermission(Context context, String permission)
get Authority From Permission 
if (TextUtils.isEmpty(permission)) {
    return null;
List<PackageInfo> packs = context.getPackageManager()
        .getInstalledPackages(PackageManager.GET_PROVIDERS);
if (packs == null) {
    return null;
for (PackageInfo pack : packs) {
    ProviderInfo[] providers = pack.providers;
    if (providers != null) {
        for (ProviderInfo provider : providers) {
            if (permission.equals(provider.readPermission)
                    || permission.equals(provider.writePermission)) {
                return provider.authority;
return null;