public void showPopup(View v){
    PopupMenu popup = new PopupMenu(this,v);
    MenuInflater inflater = popup.getMenuInflater();
    inflater.inflate(R.menu.popup, popup.getMenu());
    popup.setOnMenuItemClickListener(this);
    popup.show();
  }

  @Override
  public boolean onMenuItemClick(MenuItem arg0) {
    switch (arg0.getItemId()) {
    case R.id.item1:
      Toast.makeText(this, "you have clicked the item 1", Toast.LENGTH_LONG).show();
      break;
    case R.id.item2:
      Toast.makeText(this, "you have clicked the item 2", Toast.LENGTH_LONG).show();
      break;
    case R.id.item3:
      Toast.makeText(this, "you have clicked the item 3", Toast.LENGTH_LONG).show();
      break;
    default:
      break;
    }
    return false;
  }

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical"
  >

  <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/clickMe" 
    android:onClick="showPopup"
    android:clickable="true"/>
  
  <ImageButton 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/ic_launcher"
    android:clickable="true"
    android:onClick="showPopup" />
   
</LinearLayout>