启动其它APP中的Activity
Intent intent = new Intent();
String packageUrl = "com.simon.bbb";
String activityUrl = "com.simon.bbb.MainActivity";
// 1.是当前的包名,2跳转activity的类名,一定要加上包名
intent.setClassName(packageUrl, activityUrl);
PackageManager packageManager = MainActivity.this.getPackageManager();
List<ResolveInfo> activities = packageManager.queryIntentActivities(
intent, 0);
// 如果安全的话，启动一个activity
if (activities != null && activities.size() > 0) {
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
MainActivity.this.startActivity(intent);
}