启动第二个Activity

activity_main.xml文件：

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

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <Button  android:id="@+id/myButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="启动第二个Activilty" /> </RelativeLayout>

创建activity_second.xml文件：

SecondActivity.java:

package com.example.z1178.test;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;public class SecondActivity extends ActionBarActivity {
             @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_second);    }}

MainActivity.java文件：

package com.example.z1178.test;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.Button;public class MainActivity extends Activity {
             private static final String TAG="debug";    private Button myButton;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        myButton=(Button)findViewById(R.id.myButton);        buttonClickListener listener=new buttonClickListener();        myButton.setOnClickListener(listener);    }    class  buttonClickListener implements View.OnClickListener{        @Override        public void onClick(View v) {            Intent intent=new Intent();            //setClass的第一个參数为Context对象（Activity为其子类），第二个參数为要启动的Activity            intent.setClass(MainActivity.this,SecondActivity.class);            startActivity(intent);        }    }}

AndroidManifest.xml文件：

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

 <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.z1178.test" > <application  android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity  android:name=".MainActivity" 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/title_activity_second" > </activity> </application> </manifest>