Actionbar的使用

package com.example.myactionbardemo2;

import android.os.Bundle;
import android.app.ActionBar;
import android.app.Fragment;
import android.app.ActionBar.Tab;
import android.app.ActionBar.TabListener;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
//展現了actionbar的tab模式和list模式。

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		ActionBar actionBar=getActionBar();
		actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
		Tab tab1=actionBar.newTab();
		tab1.setText("tab1");
		//必須添加監聽器，不然會報錯
		//MyTabListener的設置能夠使每一個tab使用本身的監聽器，顯示本身不一樣的fragment裏的內容
		tab1.setTabListener(new MyTabListener<MyFragment1>(MyFragment1.class, this,R.id.container));
		Tab tab2=actionBar.newTab();
		tab2.setText("tab1");
		tab2.setTabListener(new MyTabListener<MyFragment2>(MyFragment2.class, this,R.id.container));
		Tab tab3=actionBar.newTab();
		tab3.setText("tab1");
		tab3.setTabListener(new MyTabListener<MyFragment3>(MyFragment3.class, this,R.id.container));
	    actionBar.addTab(tab1);
	    actionBar.addTab(tab2);
	    actionBar.addTab(tab3);
	    
	    Button button=(Button) findViewById(R.id.but);
		button.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				Intent intent=new Intent(getApplicationContext(), OtherActivity.class);
				startActivity(intent);
			}
		});
	}

	class MyTabListener<T extends Fragment> implements TabListener{
		Class<T> fragmentClass;
		Activity activity;
		int container;
		Fragment fragment;

		public MyTabListener(Class<T> fragmentClass, Activity activity,
				int container) {
			super();
			this.fragmentClass = fragmentClass;
			this.activity = activity;
			this.container = container;
		}

		@Override
		public void onTabReselected(Tab tab, FragmentTransaction ft) {
			// TODO Auto-generated method stub
			
		}

		@Override
		public void onTabSelected(Tab tab, FragmentTransaction ft) {
			// TODO Auto-generated method stub
			if (fragment==null) {
				//fragment.getName返回的是包名+各自fragment的名字
				fragment=Fragment.instantiate(activity, fragmentClass.getName(),null);
				//把fragment加入到activity中，該fragment能夠有界面（在onCreateView生成）,也能夠返回空無界面
				ft.add(container, fragment);
			}else {
				ft.attach(fragment);
			}
		}

		@Override
		public void onTabUnselected(Tab tab, FragmentTransaction ft) {
			// TODO Auto-generated method stub
			if (fragmentClass!=null) {
				ft.detach(fragment);
			}
		}
	
		/*actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
		ArrayList<CharSequence> list=new ArrayList<CharSequence>();
		list.add("item1");
		list.add("item2");
		ArrayAdapter<CharSequence> adapter=new ArrayAdapter<CharSequence>(getApplicationContext(), android.R.layout.simple_list_item_1, list);
		actionBar.setListNavigationCallbacks(adapter, new OnNavigationListener() {
			
			@Override
			public boolean onNavigationItemSelected(int itemPosition, long itemId) {
				// TODO Auto-generated method stub
				switch (itemPosition) {
				case 0:
					Toast.makeText(getApplicationContext(), "item1",1000).show();
					break;
				case 1:
					Toast.makeText(getApplicationContext(), "item2",1000).show();
					break;
				}
				return true;
			}
		});*/
		/*actionBar.setDisplayHomeAsUpEnabled(true);
		actionBar.setHomeButtonEnabled(false);*/
		
	}
	

}

package com.example.myactionbardemo2;

import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.MenuItem;

public class OtherActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.other);
		//當放回父activity時使用
		ActionBar actionBar=getActionBar();
		actionBar.setDisplayHomeAsUpEnabled(true);
		//其單擊處理事件在onOptionsItemSelected裏。
		actionBar.setHomeButtonEnabled(true);
	}
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		switch (item.getItemId()) {
		case android.R.id.home:
			Intent intent=new Intent(this,MainActivity.class);
			intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
			startActivity(intent);
			break;
		}
		return true;
	}

}

當在actionbar的不一樣tab進行切換時，進行fragment的切換，xml代碼以下

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >
    <FrameLayout android:id="@+id/container"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        ></FrameLayout>

  <Button android:id="@+id/but"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="點擊跳轉"
      android:layout_below="@id/container"/>
</RelativeLayout>

注意是在主界面佈局中使用的framelayout標籤進行fragment的生成切換。

源碼連接：http://download.csdn.net/detail/u010095768/6422139