用執行個體說話!
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.cctvjiatao.viewpagedemo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/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>
</application>
</manifest>
MainActivity.java
package com.cctvjiatao.viewpagedemo;
import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
/**
* @作者: jiatao
* @修改時間:2016-4-12 上午7:53:22
* @包名:com.cctvjiatao.viewpagedemo
* @檔案名:FragAdapter.java
* @版權聲明:www.cctvjiatao.com
* @功能: 最簡單的 ViewPage+Fragment執行個體
*/
public class MainActivity extends FragmentActivity {
private ViewPager viewpager;
private FragAdapter adapter;
private List<Fragment> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewpager = (ViewPager) findViewById(R.id.viewpager);
list = new ArrayList<Fragment>();
list.add(new Frag1());
list.add(new Frag2());
adapter = new FragAdapter(getSupportFragmentManager(), list);
viewpager.setAdapter(adapter);
viewpager.setCurrentItem(0);
}
}
activity_main.xml
<?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" >
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:flipInterval="30"
android:persistentDrawingCache="animation" />
</RelativeLayout>
<!--
android:flipInterval; flip是替換,翻轉;Interval是間隔;
意思就是設定裡面每一個View顯示的時間;
android:persistentDrawingCache; 字面意思就是 持久化繪畫緩存;
定義繪圖的高速緩存的持久性。 繪圖緩存可能由一個 ViewGroup 在特定情況下為其所有的子類啟用,例如在一個滾動的過程中。 此屬性可以保留在記憶體中的緩存後其初始的使用。 堅持緩存會消耗更多的記憶體,但可能會阻止頻繁的垃圾回收是反複建立緩存。 預設情況下持續存在設定為滾動。
其屬性值隻有以下幾種:
none 0x0 The drawing cache is not persisted after use.
animation 0x1 The drawing cache is persisted after a layout animation.
scrolling 0x2 The drawing cache is persisted after a scroll.
all 0x3 The drawing cache is always persisted.
-->
Frag1.java
package com.cctvjiatao.viewpagedemo;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Toast;
/**
* @作者: jiatao
* @修改時間:2016-4-12 上午8:04:22
* @包名:com.cctvjiatao.viewpagedemo
* @檔案名:Frag1.java
* @版權聲明:www.cctvjiatao.com
* @功能: 第一個Fragment
*/
public class Frag1 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.act_frag1, container,false);
view.findViewById(R.id.btn).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getActivity(), "第一個Fragment", 3000).show();
}
});
return view;
}
}
Frag2.java
package com.cctvjiatao.viewpagedemo;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Toast;
/**
* @作者: jiatao
* @修改時間:2016-4-12 上午8:04:22
* @包名:com.cctvjiatao.viewpagedemo
* @檔案名:Frag2.java
* @版權聲明:www.cctvjiatao.com
* @功能: 第二個Fragment
*/
public class Frag2 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.act_frag2, container, false);
view.findViewById(R.id.btn).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getActivity(), "第二個Fragment", 3000).show();
}
});
return view;
}
}
FragAdapter.java
package com.cctvjiatao.viewpagedemo;
import java.util.List;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
/**
* @作者: jiatao
* @修改時間:2016-4-12 上午7:59:22
* @包名:com.cctvjiatao.viewpagedemo
* @檔案名:FragAdapter.java
* @版權聲明:www.cctvjiatao.com
* @功能: FragmentPager擴充卡
*/
public class FragAdapter extends FragmentPagerAdapter {
private List<Fragment> list;
public FragAdapter(FragmentManager fm) {
super(fm);
}
public FragAdapter(FragmentManager fm, List<Fragment> list) {
super(fm);
this.list = list;
}
@Override
public Fragment getItem(int postion) {
return list.get(postion);
}
@Override
public int getCount() {
return list.size();
}
}
act_frag1.xml
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="54dp"
android:text="第一個Fragment"/>
</RelativeLayout>
act_frag2.xml
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="54dp"
android:text="第二個Fragment"/>
</RelativeLayout>