TabActivity 分页 使用

原创 于 2010-01-13 15:29:57 发布 · 66 阅读 · 0 ·
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本文介绍TabActivity在Android开发中的应用，通过实例演示了如何创建多个标签页面，并为每个标签自定义不同的布局与组件，如TextView、ImageView等。

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TabActivity 分页

[功能]
TabActivity 即 该Activity 包括 若干个标签 每个标签里面包含一个Layout 就如同普通意义上的Activity 一样

[原理]
1. 每个标签的生成 都是借助于 TabHost
2. 每个标签里面都可以当做一个Activity 里面可以包含若干个View 比如 TextView ImageView 等等
3. 若干个标签是以 String 参数来区分的

[代码]
1. 得到TabHost实例

TabHost host = this.getTabHost();

(其仅在TabActivity里面有效)

2. 创建一个标签

public final static String TAB1 = "tab1";

host.addTab(host.newTabSpec(TAB1)
                .setIndicator("", getResources().getDrawable(R.drawable.beijing_001_mb5ucom))
                .setContent(item));


3. 标签里面如何布局 

host.setContent(item));

(且 item 必须 implements TabHost.TabContentFactory)

4. 自定义标签的布局

public class CustomTabs implements TabHost.TabContentFactory  {
	Activity activity;
	LayoutInflater inflater;

	LinearLayout layout;

	public CustomTabs (Activity a) {
		activity = a;
		inflater = activity.getLayoutInflater();
	}

	/** {@inheritDoc} */
    public View createTabContent(String tag) {
    		activity.setTitle(tag);

    		return addCustomView(tag);
    }


    public View addCustomView(String id){

    	layout = new LinearLayout(activity);
        layout.setOrientation(LinearLayout.VERTICAL);

        if(id.equals(TAB1)){
            ImageView iv = new ImageView(activity);
            iv.setImageResource(R.drawable.o);
            layout.addView(iv,
            		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT));
        }
        else if(id.equals(TAB2)){

            EditText edit = new EditText(activity);
            layout.addView(edit,
            		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));

            Button btn = new Button(activity);
            btn.setText("OK");
            layout.addView(btn,
            		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));

            RadioGroup group = new RadioGroup(activity);
            group.setOrientation(LinearLayout.HORIZONTAL);
            RadioButton radio1 = new RadioButton(activity);
            radio1.setText("Radio 1");
            group.addView(radio1);
            RadioButton radio2 = new RadioButton(activity);
            radio2.setText("Radio 2");
            group.addView(radio2);

            layout.addView(group,
            		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
        }
        else if(id.equals(TAB3)){

        	LinearLayout.LayoutParams param3 =
                new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT);

            layout.addView(inflater.inflate(R.layout.item_3, null),param3);
        }
        else if(id.equals(TAB4)){

        	LinearLayout.LayoutParams param4 =
                new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT);

            layout.addView(inflater.inflate(R.layout.item_4, null),param4);
        }
        else {
        	TextView tv5 = new TextView(activity);
        	tv5.setText("no resource aviable!");
        	tv5.setGravity(1);

        	layout.addView(tv5,
            		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT));
        }

        return layout;
    }

}



[所有代码]

public class CustomTabsUsage extends TabActivity {
	public final static String TAB1 = "tab1";
	public final static String TAB2 = "tab2";
	public final static String TAB3 = "tab3";
	public final static String TAB4 = "tab4";
	public final static String TAB5 = "tab5";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        CustomTabs item = new CustomTabs(this);

        TabHost host = this.getTabHost();

        host.addTab(host.newTabSpec(TAB1)
                .setIndicator("", getResources().getDrawable(R.drawable.beijing_001_mb5ucom))
                .setContent(item));
        host.addTab(host.newTabSpec(TAB2)
                .setIndicator("",getResources().getDrawable(R.drawable.beijing_002_mb5ucom))
                .setContent(item));
        host.addTab(host.newTabSpec(TAB3)
        		.setIndicator("",getResources().getDrawable(R.drawable.beijing_003_mb5ucom))
        		//.setIndicator("Tab3")
                .setContent(item));
        host.addTab(host.newTabSpec(TAB4)
                .setIndicator("",getResources().getDrawable(R.drawable.beijing_004_mb5ucom))
                .setContent(item));
        host.addTab(host.newTabSpec(TAB5)
                .setIndicator("",getResources().getDrawable(R.drawable.beijing_005_mb5ucom))
                .setContent(item));


        host.setOnTabChangedListener(new OnTabChangeListener(){
			@Override
			public void onTabChanged(String tabId) {
				// TODO Auto-generated method stub

			}
        });

    }


public class CustomTabs implements TabHost.TabContentFactory  {
	Activity activity;
	LayoutInflater inflater;

	LinearLayout layout;

	public CustomTabs (Activity a) {
		activity = a;
		inflater = activity.getLayoutInflater();
	}

	/** {@inheritDoc} */
    public View createTabContent(String tag) {
    		activity.setTitle(tag);

    		return addCustomView(tag);
    }


    public View addCustomView(String id){

    	layout = new LinearLayout(activity);
        layout.setOrientation(LinearLayout.VERTICAL);

        if(id.equals(TAB1)){
            ImageView iv = new ImageView(activity);
            iv.setImageResource(R.drawable.o);
            layout.addView(iv,
            		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT));
        }
        else if(id.equals(TAB2)){

            EditText edit = new EditText(activity);
            layout.addView(edit,
            		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));

            Button btn = new Button(activity);
            btn.setText("OK");
            layout.addView(btn,
            		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));

            RadioGroup group = new RadioGroup(activity);
            group.setOrientation(LinearLayout.HORIZONTAL);
            RadioButton radio1 = new RadioButton(activity);
            radio1.setText("Radio 1");
            group.addView(radio1);
            RadioButton radio2 = new RadioButton(activity);
            radio2.setText("Radio 2");
            group.addView(radio2);

            layout.addView(group,
            		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
        }
        else if(id.equals(TAB3)){

        	LinearLayout.LayoutParams param3 =
                new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT);

            layout.addView(inflater.inflate(R.layout.item_3, null),param3);
        }
        else if(id.equals(TAB4)){

        	LinearLayout.LayoutParams param4 =
                new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT);

            layout.addView(inflater.inflate(R.layout.item_4, null),param4);
        }
        else {
        	TextView tv5 = new TextView(activity);
        	tv5.setText("no resource aviable!");
        	tv5.setGravity(1);

        	layout.addView(tv5,
            		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT));
        }

        return layout;
    }

}


}
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