启动新的Activity

新建一个Activity类：

package com.sun.hello;

import android.app.Activity;

import android.os.Bundle;

import android.widget.Button;

public class SecondActivity extends Activity {

private Button button;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.secondmain);

}

}

新建：layout/secondmain.xml布局文件

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="second" />

<Button 

   android:id="@+id/secondbut1"

   android:layout_width="wrap_content"

   android:layout_height="wrap_content"

   android:text="SecondText"

   />

</LinearLayout>

package com.sun.hello;

import android.app.Activity;

import android.content.Intent;

import android.location.GpsStatus.Listener;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class HelloActivity extends Activity {

private Button button = null;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

button = (Button) findViewById(R.id.but1);

button.setOnClickListener(listener);

}

private OnClickListener listener = new OnClickListener() {

public void onClick(View v) {

// TODO Auto-generated method stub

Intent intent = new Intent();

intent.setClass(HelloActivity.this, SecondActivity.class);//指定跳转的Activity类

startActivity(intent);

}

};

}

//最后需要在AndroidManifest.xml文件中配置

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.sun.hello"

    android:versionCode="1"

    android:versionName="1.0" >

 

    <uses-sdk android:minSdkVersion="15" />

 

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name" >

        <activity

            android:name=".HelloActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

 

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity

            android:name=".SecondActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

 

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

<uses-permission android:name="android.permission.CALL_PHONE" />

<uses-permission android:name="android.permission.SEND_SMS"/>

</manifest>