Get Activity name dynamically - android

问题

I'd like to get the name of the current Activity to be sent along in the URI of an HttpRequest. Is there a way to do this without referring specifically to the Activity?

I know I can do myActivity.class.toString() but this is just a less efficient way of hard coding "myActivity" since I'm making a static reference to my Activity. Is there a more general way to do this using something like 'this' (which btw doesn't actually work here because it returns more information than what's desired).

回答1:

Use this.getClass().getSimpleName() to get the name of the Activity.

From the comments, if you're in the context of an OnClickListener (or other inner class), specify the class manually:

MainActivity.class.getSimpleName()

回答2:

For purists out there who may not want to use reflection, an alternative way is to use the PackageManager as follows:

PackageManager packageManager = activity.getPackageManager();
try {
  ActivityInfo info = packageManager.getActivityInfo(activity.getComponentName(), 0);
  Log.e("app", "Activity name:" + info.name);
} catch (NameNotFoundException e) {
  e.printStackTrace();
}

However this seems like a lot of work just to do the same as getClass().getName() (and not even getSimpleName()). But I guess it may be useful for someone who wants more information about the activity than just the class name.

回答3:

ActivityManager am = (ActivityManager)context.getSystemService(ACTIVITY_SERVICE);
List< ActivityManager.RunningTaskInfo > taskInfo = am.getRunningTasks(1);
this.currentActivity = taskInfo.get(0).topActivity.getClassName();
Log.i( "CURRENT Activity ",  currentActivity);

回答4:

First: open your manifest.xml file

you will find your package name i.e. "com.company.projectname"

Then: lets say your activity name is MainActivity

MainActivity.class.getCanonicalName() >output> "com.company.projectname.MainActivity"

MainActivity.class.getSimpleName() >output> "MainActivity"

MainActivity.class.getName() >output> "com.company.projectname.MainActivity"

回答5:

For Xamarin

string GetActivityClassName(Activity activity) //Receiving LoginActivity
{
    //ComponentName
    activity.ComponentName; //Output: "md5101a0260d0a0e5d40a0a9009be09b0c2.LoginActivity"

    //LocalClassName
    activity.LocalClassName; //Output: "md5101a0260d0a0e5d40a0a9009be09b0c2.LoginActivity"

    //Java.Lang.Class.FromType.SimpleName
    Java.Lang.Class.FromType(activity.GetType()).SimpleName; //Output "LoginActivity"

    //Type.Name
    activity.GetType().Name; //Output "LoginActivity"
}

来源：https://stackoverflow.com/questions/10628152/get-activity-name-dynamically-android

标签

android

android-activity

introspection