Android Utililty Methods Activity Start

List of utility methods to do Activity Start

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Description

The list of methods to do Activity Start are organized into topic(s).

Method

voidgoToActivity(Context currentActivity, Class newClass)
Switches to the given class (which must be a subclass of Activity). 
Intent newActivity = new Intent(currentActivity, newClass);
currentActivity.startActivity(newActivity);
voidgoToActivity(Context currentActivity, Class newClass, List extras)
go To Activity 
Intent newActivity = new Intent(currentActivity, newClass);
if (extras != null) {
    NameValuePair thisExtra = null;
    for (int x = 0; x < extras.size(); x++) {
        thisExtra = extras.get(x);
        newActivity.putExtra(thisExtra.getName(),
                thisExtra.getValue());
currentActivity.startActivity(newActivity);
voidopenActivity(Context packageContext, int flags, Map pairs, boolean closeCurrentContext, Class activity)
Purpose - Launch an activity 
if (packageContext == null)
    return;
Intent intent = new Intent(packageContext, activity);
intent.setFlags(flags);
if (pairs != null && !pairs.isEmpty()) {
    Bundle extras = new Bundle();
    for (Entry<String, String> pair : pairs.entrySet()) {
        extras.putString(pair.getKey(), pair.getValue());
...
voidstartApkActivity(final Context ctx, String packageName)
start Apk Activity 
PackageManager pm = ctx.getPackageManager();
PackageInfo pi;
try {
    pi = pm.getPackageInfo(packageName, 0);
    Intent intent = new Intent(Intent.ACTION_MAIN, null);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);
    intent.setPackage(pi.packageName);
    List<ResolveInfo> apps = pm.queryIntentActivities(intent, 0);
...
voidrestartActivity(final Activity activity)
Restart the activity smoothly 
if (activity == null)
    return;
final int enter_anim = android.R.anim.fade_in;
final int exit_anim = android.R.anim.fade_out;
activity.overridePendingTransition(enter_anim, exit_anim);
activity.finish();
activity.overridePendingTransition(enter_anim, exit_anim);
activity.startActivity(activity.getIntent());
...
voidrestartPC(final Activity activity)
Restart the activity smoothly 
if (activity == null)
    return;
final int enter_anim = android.R.anim.fade_in;
final int exit_anim = android.R.anim.fade_out;
activity.overridePendingTransition(enter_anim, exit_anim);
activity.finish();
activity.overridePendingTransition(enter_anim, exit_anim);
activity.startActivity(activity.getIntent());
...
voidstartActivity(Context context, Class activity)
start Activity 
Intent intent = new Intent(context, activity);
context.startActivity(intent);
voidstartNewActivity(Class target, final Activity activity)
start New Activity 
Intent intent = new Intent(activity, target);
activity.startActivity(intent);
voidprepare(Activity activity, int id, int width)
prepare 
if (sCoverBitmap != null) {
    sCoverBitmap.recycle();
Rect rectgle = new Rect();
Window window = activity.getWindow();
window.getDecorView().getWindowVisibleDisplayFrame(rectgle);
int statusBarHeight = rectgle.top;
ViewGroup v1 = (ViewGroup) activity.findViewById(id).getRootView();
...