Here you can find the source of intentDIY(Activity activity, Class> classes)
public static void intentDIY(Activity activity, Class<?> classes)
//package com.java2s; import java.util.Iterator; import java.util.Map; import java.util.Set; import android.app.Activity; import android.content.Intent; public class Main { public static int DEFAULT_ENTER_ANIM; public static int DEFAULT_EXIT_ANIM; private static Intent intent; public static void intentDIY(Activity activity, Class<?> classes) { intentDIY(activity, classes, null, DEFAULT_ENTER_ANIM, DEFAULT_EXIT_ANIM);//www .j a v a 2 s .c o m } public static void intentDIY(Activity activity, Class<?> classes, Map<String, String> paramMap) { intentDIY(activity, classes, paramMap, DEFAULT_ENTER_ANIM, DEFAULT_EXIT_ANIM); } public static void intentDIY(Activity activity, Class<?> classes, int enterAnim, int exitAnim) { intentDIY(activity, classes, null, enterAnim, exitAnim); } public static void intentDIY(Activity activity, Class<?> classes, Map<String, String> paramMap, int enterAnim, int exitAnim) { intent = new Intent(activity, classes); organizeAndStart(activity, classes, paramMap); if (enterAnim != 0 && exitAnim != 0) { activity.overridePendingTransition(enterAnim, exitAnim); } } private static void organizeAndStart(Activity activity, Class<?> classes, Map<String, String> paramMap) { intent = new Intent(activity, classes); if (null != paramMap) { Set<String> set = paramMap.keySet(); for (Iterator<String> iterator = set.iterator(); iterator .hasNext();) { String key = iterator.next(); intent.putExtra(key, paramMap.get(key)); } } intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); activity.startActivity(intent); } }