Android Bundle sharedpreferences Differences

The effect is as follows:

Initial interface

Enter information

After "OK"

First, the API document description

1. Introduction

For data transfer between different activity

1. Important Methods

　　　　Clear (): Clears all saved data from this bundle map.

　　　　Clone (): Clone current Bundle

　　　　ContainsKey (String Key): Returns the value of the specified key

　　　　GetString (String Key): Returns the character of the specified key

　　　　Hasfiledescriptors (): Indicates whether any bundled package file descriptors are included

　　　　IsEmpty (): Returns True if this bundle map is empty

　　　　Putstring (string key, String value): Inserts a string value for a given key

　　　　Readfromparcel (Parcel Parcel): Read the contents of this Parcel

　　　　Remove (String key): Removes the value from the specified key

　　　　Writetoparcel (Parcel Parcel, int flags): Write the contents of this Parcel

Second, examples

　　

public class Bundledemo extends Activity {
Private EditText Etname;
Button btn;

/*
* (Non-javadoc)
*
* @see Android.app.activity#oncreate (android.os.Bundle)
*/
@Override
protected void OnCreate (Bundle savedinstancestate) {
TODO auto-generated Method Stub
Super.oncreate (savedinstancestate);

Setcontentview (R.layout.bundle);

Etname = (EditText) Findviewbyid (r.id.etname);
BTN = (Button) Findviewbyid (R.ID.BTN);
Btn.setonclicklistener (New Onclicklistener () {

@Override
public void OnClick (View v) {
String info = Etname.gettext (). toString ();
Bundle bundle = new bundle ();

Save the input information
Bundle.putstring ("name", info);
Intent intent=new Intent (bundledemo.this,bundledemo1.class);
Intent.putextras (bundle);
Finish ();
StartActivity (Intent);
}
});

}

}

public class BundleDemo1 extends Activity {
Private TextView Etname;
/* (Non-javadoc)
* @see Android.app.activity#oncreate (android.os.Bundle)
*/
@Override
protected void OnCreate (Bundle savedinstancestate) {
TODO auto-generated Method Stub
Super.oncreate (savedinstancestate);

Setcontentview (R.LAYOUT.B1);

Etname= (TextView) Findviewbyid (r.id.txtname);
Bundle b=getintent (). Getextras ();
Get information on bundles
String info=b.getstring ("name");
Etname.settext ("Your Name:" +info);
}

}

Three, the difference with the sharedpreferences

Sharedpreferences is a simple storage persistence setting, just like a user's home page each time the application is opened, it is simply a simple key-value pair to manipulate. It saves the data in an XML file

Bundles are data storage methods that pass data to another context or save or reply to your own state. Its data is not a persistent state.

Android Bundle sharedpreferences differences