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Android Change Activity
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Change activity first we should create a activity ,
we should extends class activity and override onCreate() , then configure information in AndroidMainfest.xml .
there two importment attrbutes call name and label ,name attrbute tell android system how to find activity and the label eauql the title of the activity .
package com.example.chatdemo;import android.app.Activity;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;/** * 1.a activity have to extends Activity 1 * 2.override onClreate() method * 3. configure information on AndroidMainfest.xml * <activity android:name="com.example.chatdemo.MainActivity" android:label="@string/app_name" > </activity> this means default activity <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> * */public class chat extends ActionBarActivity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //setContenView() when execute this activity will dispaly follow layout setContentView(R.layout.chat); }}
if you want go to the activity should set a onclick event
Intent intent = new Intent(); intent.setClass(this, chat.class); startActivity(intent);
use class Intent pack activity class finally use method startActivity() to start a activity .
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