How to correctly set multiple tag values for a view in Android

During Android development, we often use the View.settag (object) method, especially when reusing view in a custom adapter of a ListView. The view also provides a way to set up multiple tag data, View.settag (Int,object), where the int value needs to be set correctly, otherwise this method will give an error. Let's see how to set this value. Look at the results first:

As you can see from the Eclipse print log, I set the 4 different types of tag values for the GridView. Take a look at the code again.

 PackageCom.androidtest.scroll;ImportAndroid.os.Bundle;ImportAndroid.util.Log;ImportAndroid.view.View;ImportAndroid.view.View.OnClickListener;ImportAndroid.widget.AbsListView;ImportAndroid.widget.AbsListView.OnScrollListener;ImportAndroid.widget.Button;ImportAndroid.widget.GridView;ImportAndroid.widget.TextView;ImportCOM.ANDROIDTEST.R;Importcom.androidtest.base.BaseActivity; Public  class gridviewactivity extends baseactivity  implements  Onclicklistener{    PrivateTextView title;PrivateGridView GridView;PrivateButton Btn_settag,btn_gettag;Private Final Static intFive=5<< -;Private Final Static intsix=6<< -;Private Final Static intserven=7<< -;Private Final Static inteight=8<< -;@Override    protected void onCreate(Bundle savedinstancestate) {//TODO auto-generated method stub        Super. OnCreate (Savedinstancestate);        Setcontentview (R.layout.activity_gridview);    Init (); }Private void Init() {title= (TextView) Findviewbyid (r.id.title); Title.settext ("Test GridView"); Findviewbyid (R.id.back). Setonclicklistener (NewOnclicklistener () {@Override             Public void OnClick(View v) {//TODO auto-generated method stubFinish ();        }        });        Rootview=findviewbyid (R.id.rootview);        Btn_gettag= (Button) Findviewbyid (R.id.btn_gettag);        Btn_settag= (Button) Findviewbyid (R.id.btn_settag); Btn_settag.setonclicklistener ( This); Btn_gettag.setonclicklistener ( This);        gridview= (GridView) Findviewbyid (R.id.gridview);    Gridview.setadapter (Createadapter ()); }@Override     Public void OnClick(View v) {//TODO auto-generated method stub        if(V==btn_gettag)        {Gettag (); }Else if(V==btn_settag)        {Settag (); }    }Private void Settag() {Gridview.settag (five,"Hello World"); Gridview.settag (Six,true); Gridview.settag (Serven, -); Gridview.settag (Eight,158.9f); }Private void Gettag() {LOG.E ("GridView Gettag (Index)","String:"+ (String) Gridview.gettag (five)); LOG.E ("GridView Gettag (Index)","Boolean:"+ ((Boolean) Gridview.gettag (six)); LOG.E ("GridView Gettag (Index)","int:"+ ((Integer) Gridview.gettag (Serven))); LOG.E ("GridView Gettag (Index)","float:"+ (Float) Gridview.gettag (eight)); }}

Operating interface:

The int value in View.settag (Int,object) must be shifted to the left by 24 bits, so that no error will be done.

How to correctly set multiple tag values for a view in Android