標籤:顯示與隱藏 sans mod .class get app csdn addview 顯示
如今安卓比較流行的布局就是類似新聞client和手機QQ那種的底端可選擇,上面的個別頁面能夠滑動選擇。
在測試過程中發現用安卓內建的TabHost去構建。非常難得到自己定義的效果。
因此採用TabHost+ViewPager+RadioGroup去構建這個效果
首先要弄清楚各自的用途和功能
(1)TabHost
因為安卓內建的TabHost貌似在有些手機版本號碼上僅僅能固定在底端的位置,所以我們用GadioGroup去顯示介面button,因為構建HabHost必須定義host、tabs、content幾個內容,這樣我們隱藏tabs。用GadioGroup取代顯示。代碼例如以下:
<TabHost xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" <span style="color:#ff0000;"> android:id="@android:id/tabhost" </span> android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.android_mode.MainActivity" > <LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <FrameLayout <span style="color:#ff0000;">android:id="@android:id/tabcontent"</span> android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" > </FrameLayout> <TabWidget <span style="color:#ff0000;">android:id="@android:id/tabs"</span> android:layout_width="fill_parent" android:layout_height="wrap_content" <span style="color:#000066;">android:visibility="gone"</span> > </TabWidget> <RadioGroup android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <RadioButton android:id="@+id/b1" android:layout_width="wrap_content" android:layout_height="40dp" android:layout_weight="1" android:background="#00ABCD" android:button="@null" android:gravity="center" android:text="首頁" /> <View android:layout_width="2px" android:layout_height="fill_parent" /> <RadioButton android:id="@+id/b2" android:layout_width="wrap_content" android:layout_height="40dp" android:layout_weight="1" android:background="#00ABCD" android:button="@null" android:gravity="center" android:text="設定" /> </RadioGroup> </LinearLayout></TabHost>
對於主檔案,因為在安卓3.0版本號碼下面不支援TabActivity。因此我們考慮到相容性,選用ActivityGroup。
其詳細方法例如以下所看到的:
public class MyTabOwnAct extends ActivityGroup {RadioButton radioButton1;RadioButton radioButton2;TabHost tabHost;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.tabmain);tabHost = (TabHost) findViewById(android.R.id.tabhost);tabHost.setup();tabHost.setup(this.getLocalActivityManager()); //必需要又這個語句。假設繼承TabActivity可不要tabHost.addTab(tabHost.newTabSpec("l1").setContent(new Intent(this, Act1.class)).setIndicator("首頁"));tabHost.addTab(tabHost.newTabSpec("l2").setContent(new Intent(this, Act2.class)).setIndicator("設定"));radioButton1 = (RadioButton) findViewById(R.id.b1);radioButton2 = (RadioButton) findViewById(R.id.b2);radioButton1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubtabHost.setCurrentTabByTag("l1"); //顯示與隱藏的標記}});radioButton2.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubtabHost.setCurrentTabByTag("l2");}});}}
到眼下為止我們把底部的效果實現,即能夠通過以下的button,改變上面的介面。
接下來我們選擇上面當中的一個介面,用ViewPager實現滑動的效果。
介面布局檔案例如以下:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <TextView android:layout_width="wrap_content" android:layout_height="40dp" android:layout_weight="1" android:background="#FF0fab" android:gravity="center" android:text="頁面一" /> <View android:layout_width="2dp" android:layout_height="fill_parent" /> <TextView android:layout_width="wrap_content" android:layout_height="40dp" android:layout_weight="1" android:background="#da0ccb" android:gravity="center" android:text="頁面二" /> <View android:layout_width="2dp" android:layout_height="fill_parent" /> <TextView android:layout_width="wrap_content" android:layout_height="40dp" android:layout_weight="1" android:background="#eeffff" android:gravity="center" android:text="頁面三" /> </LinearLayout> <android.support.v4.view.ViewPager android:id="@+id/pager" android:layout_width="fill_parent" android:layout_height="fill_parent" > </android.support.v4.view.ViewPager></LinearLayout>
</pre><span style="font-size:18px">我們要準備三個介面的布局。這裡我分別命名為p1.xml,p2.xml,p3.xml,然後我們在主檔案裡通過得到ViewPager後關聯到適配器,就可以得到滑動的效果。</span><pre name="code" class="java"><span style="font-family: Arial, Helvetica, sans-serif;">public class Act1 extends Activity {</span>
ViewPager pager;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.pager);pager = (ViewPager) findViewById(R.id.pager);pager.setAdapter(new MyPagerAdapter());}class MyPagerAdapter extends PagerAdapter {List<View> list = new ArrayList<View>();public MyPagerAdapter() {// TODO Auto-generated constructor stubView view1 = LayoutInflater.from(getApplicationContext()).inflate(R.layout.p1, null);View view2 = LayoutInflater.from(getApplicationContext()).inflate(R.layout.p2, null);View view3 = LayoutInflater.from(getApplicationContext()).inflate(R.layout.p3, null);list.add(view1);list.add(view2);list.add(view3);}@Overridepublic Object instantiateItem(ViewGroup container, int position) {// TODO Auto-generated method stub((ViewPager) container).addView(list.get(position));return list.get(position);}@Overridepublic void destroyItem(ViewGroup container, int position, Object object) {// TODO Auto-generated method stub// super.destroyItem(container, position, object);((ViewPager) container).removeView(list.get(position));///(position);// (list.get(position));}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn list.size();}@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {// TODO Auto-generated method stubreturn arg0 == arg1;}}}效果顯示圖:
安卓TabHost+ViewPager+RadioGroup多功能模板整理