Android底部TabHost API

  1 package com.api;
  2 
  3 import android.app.TabActivity;
  4 import android.content.Intent;
  5 import android.os.Bundle;
  6 import android.view.LayoutInflater;
  7 import android.view.View;
  8 import android.widget.LinearLayout;
  9 import android.widget.TabHost;
 10 import android.widget.TabHost.OnTabChangeListener;
 11 import android.widget.TabHost.TabSpec;
 12 import android.widget.TabWidget;
 13 import android.widget.TextView;
 14 
 15 public abstract class TabHostActivity extends TabActivity {
 16 
 17     private TabHost mTabHost;
 18     private TabWidget mTabWidget;
 19     private LayoutInflater mLayoutflater;
 20 
 21     @Override
 22     protected void onCreate(Bundle savedInstanceState) {
 23         super.onCreate(savedInstanceState);
 24         // set theme because we do not want the shadow
 25         setTheme(R.style.Theme_Tabhost);
 26         setContentView(R.layout.api_tab_host);
 27         
 28         mLayoutflater = getLayoutInflater();
 29 
 30         mTabHost = getTabHost();
 31         mTabWidget = getTabWidget();
 32         //mTabWidget.setStripEnabled(false);    // need android2.2
 33         
 34         prepare();
 35 
 36         initTop();
 37         initTabSpec();
 38     }
 39     
 40     private void initTop() {
 41         View child = getTop();
 42         LinearLayout layout = (LinearLayout) findViewById(R.id.tab_top);
 43         layout.addView(child);
 44     }
 45 
 46     private void initTabSpec() {
 47 
 48         int count = getTabItemCount();
 49 
 50         for (int i = 0; i < count; i++) {
 51             // set text view
 52             View tabItem = mLayoutflater.inflate(R.layout.api_tab_item, null);
 53             
 54             TextView tvTabItem = (TextView) tabItem.findViewById(R.id.tab_item_tv);
 55             setTabItemTextView(tvTabItem, i);
 56             // set id
 57             String tabItemId = getTabItemId(i);
 58             // set tab spec
 59             TabSpec tabSpec = mTabHost.newTabSpec(tabItemId);
 60             tabSpec.setIndicator(tabItem);
 61             tabSpec.setContent(getTabItemIntent(i));
 62             
 63             mTabHost.addTab(tabSpec);
 64         }
 65         
 66         
 67     
 68     }
 69     
 70     
 71     
 72 
 73     
 74     
 75 
 76     /** 在初始化界面之前调用 */
 77     protected void prepare() {
 78         // do nothing or you override it
 79     }
 80 
 81     /** 自定义头部布局 */
 82     protected View getTop() {
 83         // do nothing or you override it
 84         return null;
 85     }
 86     
 87     protected int getTabCount() {
 88         return mTabHost.getTabWidget().getTabCount();
 89     }
 90 
 91     /** 设置TabItem的图标和标题等*/
 92     abstract protected void setTabItemTextView(TextView textView, int position);
 93 
 94     abstract protected String getTabItemId(int position);
 95     
 96     abstract protected Intent getTabItemIntent(int position);
 97 
 98     abstract protected int getTabItemCount();
 99     
100     protected void setCurrentTab(int index) {
101         mTabHost.setCurrentTab(index);
102     }
103     
104     protected void focusCurrentTab(int index) {
105         mTabWidget.focusCurrentTab(index);
106     }
107 
108 }

 1 package com.api.example.app;
 2 
 3 import android.content.Intent;
 4 
 5 public class TabItem {
 6     private String title;        // tab item title
 7     private int icon;            // tab item icon
 8     private int bg;            // tab item background
 9     private Intent intent;    // tab item intent
10     
11     public TabItem(String title, int icon, int bg, Intent intent) {
12         super();
13         this.title = title;
14         this.icon = icon;
15         this.bg = bg;
16         this.intent = intent;
17     }
18 
19     public String getTitle() {
20         return title;
21     }
22 
23     public void setTitle(String title) {
24         this.title = title;
25     }
26 
27     public int getIcon() {
28         return icon;
29     }
30 
31     public void setIcon(int icon) {
32         this.icon = icon;
33     }
34 
35     public int getBg() {
36         return bg;
37     }
38 
39     public void setBg(int bg) {
40         this.bg = bg;
41     }
42 
43     public Intent getIntent() {
44         return intent;
45     }
46 
47     public void setIntent(Intent intent) {
48         this.intent = intent;
49     }
50 }

  1 package com.api.example.app;
  2 
  3 import java.util.ArrayList;
  4 import java.util.List;
  5 
  6 import android.content.Intent;
  7 import android.os.Bundle;
  8 import android.view.LayoutInflater;
  9 import android.view.View;
 10 import android.widget.TabWidget;
 11 import android.widget.TextView;
 12 
 13 import com.api.R;
 14 import com.api.TabHostActivity;
 15 
 16 /**
 17  * <p>整个流程就像使用ListView自定BaseAdapter一样</p>
 18  * 
 19  * <p>如果要自定义TabHostActivity的Theme，并且不想要头部阴影
 20  * 一定要添加这个android:windowContentOverlay = null</p>
 21  * 
 22  * <p>如果想在别的项目里面使用TabHostActivity
 23  * 可以项目的属性里面找到Android，然后在Library部分添加这个项目(Api)
 24  * <a href="http://www.cnblogs.com/qianxudetianxia/archive/2011/05/01/2030232.html">如何添加</a></p>
 25  * */
 26 public class ExampleActivity extends TabHostActivity {
 27 
 28     List<TabItem> mItems;
 29     private LayoutInflater mLayoutInflater;
 30     
 31     /**在初始化TabWidget前调用
 32      * 和TabWidget有关的必须在这里初始化*/
 33     @Override
 34     protected void prepare() {
 35         TabItem home = new TabItem(
 36                 "首页",                                    // title
 37                 R.drawable.icon_home,                    // icon
 38                 R.drawable.example_tab_item_bg,            // background
 39                 new Intent(this, Tab1Activity.class));    // intent
 40         
 41         TabItem info = new TabItem(
 42                 "资料",
 43                 R.drawable.icon_selfinfo,
 44                 R.drawable.example_tab_item_bg,
 45                 new Intent(this, Tab2Activity.class));
 46         
 47         TabItem msg = new TabItem(
 48                 "信息",
 49                 R.drawable.icon_meassage,
 50                 R.drawable.example_tab_item_bg,
 51                 new Intent(this, Tab3Activity.class));
 52         
 53         TabItem square = new TabItem(
 54                 "广场",
 55                 R.drawable.icon_square,
 56                 R.drawable.example_tab_item_bg,
 57                 new Intent(this, Tab4Activity.class));
 58         
 59         TabItem more = new TabItem(
 60                 "更多",
 61                 R.drawable.icon_more,
 62                 R.drawable.example_tab_item_bg,
 63                 new Intent(this, Tab5Activity.class));
 64         
 65         mItems = new ArrayList<TabItem>();
 66         mItems.add(home);
 67         mItems.add(info);
 68         mItems.add(msg);
 69         mItems.add(square);
 70         mItems.add(more);
 71 
 72         // 设置分割线
 73         TabWidget tabWidget = getTabWidget();
 74         tabWidget.setDividerDrawable(R.drawable.tab_divider);
 75         
 76         mLayoutInflater = getLayoutInflater();
 77     }
 78     
 79     @Override
 80     protected void onCreate(Bundle savedInstanceState) {
 81         super.onCreate(savedInstanceState);
 82         setCurrentTab(0);
 83     }
 84     
 85     /**tab的title，icon，边距设定等等*/
 86     @Override
 87     protected void setTabItemTextView(TextView textView, int position) {
 88         textView.setPadding(3, 3, 3, 3);
 89         textView.setText(mItems.get(position).getTitle());
 90         textView.setBackgroundResource(mItems.get(position).getBg());
 91         textView.setCompoundDrawablesWithIntrinsicBounds(0, mItems.get(position).getIcon(), 0, 0);
 92         
 93     }
 94     
 95     /**tab唯一的id*/
 96     @Override
 97     protected String getTabItemId(int position) {
 98         return mItems.get(position).getTitle();    // 我们使用title来作为id，你也可以自定
 99     }
100 
101     /**点击tab时触发的事件*/
102     @Override
103     protected Intent getTabItemIntent(int position) {
104         return mItems.get(position).getIntent();
105     }
106 
107     @Override
108     protected int getTabItemCount() {
109         return mItems.size();
110     }
111     
112     /**自定义头部文件*/
113     @Override
114     protected View getTop() {
115         return mLayoutInflater.inflate(R.layout.example_top, null);
116     }
117 
118 }