android學習筆記之 Fragment使用 仿QQ

源碼下載地址：http://download.csdn.net/detail/teacodeing/7931787

參考文章：http://blog.csdn.net/guolin_blog/article/details/13171191

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical" >
    
    <ImageView 
        android:id="@+id/tabImage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"/>
    
	<TextView 
	    android:id="@+id/tabTitle"
	    android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:textColor="@color/white"
        android:textSize="16sp"/>
</LinearLayout>

/**
 * 自定義tab控件
 */
public class TabItemView extends LinearLayout{

	private Context context;
	private LinearLayout.LayoutParams params = null;
	
	public TabItemView(Context context){
		this(context , null);
	}
	
	public TabItemView(Context context, AttributeSet attrs) {   
		super(context, attrs);
		this.context = context;
		
		params = new LinearLayout.LayoutParams(
				LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
		params.gravity = Gravity.CENTER;
	}

	public void createView(String title , int drawable){
		View view = LayoutInflater.from(context).inflate(R.layout.tab_item, null);
		ImageView imageView = (ImageView)view.findViewById(R.id.tabImage);
		imageView.setBackgroundResource(drawable);
		TextView textView = (TextView)view.findViewById(R.id.tabTitle);
		textView.setText(title);
		addView(view , params);
	}
	
}

package com.example.myfragment;

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;

public class MainActivity extends Activity implements OnClickListener{
	private LinearLayout tabsLayout = null;
	private FragmentManager fragmentManager = null;
	private int size = 4;
	private Fragment[] fragments = new Fragment[size];
	
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		fragmentManager = getFragmentManager();
		initView();
		initTabs();
	}
	
	public void initView(){
		tabsLayout = (LinearLayout)findViewById(R.id.tabs);
	}

	/**
	 * 初始化tab值
	 */
	public void initTabs(){
		LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
				LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
		params.weight = 1;
		for(int i = 0 ; i < size ; i ++){
			TabItemView itemView = new TabItemView(this);
			if(i == 0)
				itemView.createView(getString(R.string.news), R.drawable.tab_news);
			else if(i == 1)
				itemView.createView(getString(R.string.contacts), R.drawable.tab_contacts);
			else if(i == 2)
				itemView.createView(getString(R.string.message), R.drawable.tab_message);
			else if(i == 3)
				itemView.createView(getString(R.string.setting), R.drawable.tab_setting);
			
			itemView.setOnClickListener(this);
			itemView.setTag(i);
			tabsLayout.addView(itemView , params);
		}
		
		setTabSelection(0);
	}

	/**
	 * 點擊tab
	 */
	public void onClick(View v) {
		int index = 0;
		try{
			index = Integer.parseInt(v.getTag().toString());
		}catch(Exception e){index = 0;}
		if(index >= size)
			index = 0;
		setTabSelection(index);
		
	}
	
	/**
	 * 選中tab
	 * @param index
	 */
	public void setTabSelection(int index){
		clearSelect();
		tabsLayout.getChildAt(index).setSelected(true);
		
		FragmentTransaction transaction = fragmentManager.beginTransaction();
		hideFragments(transaction);
		Fragment fragment = null;
		if(fragments[index] != null){
			fragment = fragments[index];
			transaction.show(fragment);
		}else{
			 if(index == 1){
				fragment = new ContactsFragment();
			}else if(index == 2){
				fragment = new MessageFragment();
			}else if(index == 3){
				fragment = new SettingFragment();
			}else{
				fragment = new NewsFragment();
			}
			fragments[index] = fragment;
			transaction.add(R.id.content, fragment);
		}
		
		transaction.commit();
	}
	
	/**
	 * 清除tab所有選中狀態
	 */
	public void clearSelect(){
		for(int i = 0 ; i < tabsLayout.getChildCount(); i++){
			View v = tabsLayout.getChildAt(i);
			v.setSelected(false);
			
		}
	}
	
	/**
	 * 隱藏所有Fragment
	 * @param transaction
	 */
	public void hideFragments(FragmentTransaction transaction){
		for(Fragment fragment : fragments){
			if(fragment != null)
			transaction.hide(fragment);
		}
			
	}
	
	
	

}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
	
    <FrameLayout 
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        />
    
    <LinearLayout
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:orientation="horizontal"
        android:background="@drawable/tab_bg" />

</LinearLayout>

fragment其它文章

http://blog.csdn.net/niu_gao/article/details/7163263

http://blog.csdn.net/niu_gao/article/details/7169323

http://blog.csdn.net/niu_gao/article/details/7171697

http://blog.csdn.net/niu_gao/article/details/7172483