android中TabHost的用法

方式一
import android.app.TabActivity;
import android.os.Bundle;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;
import android.view.LayoutInflater;
import android.view.View;

import com.example.android.apis.R;

/**
 * An example of tabs that uses labels ({@link TabSpec#setIndicator(CharSequence)})
 * for its indicators and views by id from a layout file ({@link TabSpec#setContent(int)}).
 *盛放tab的容器就是TabHost,每一個tab還對應了一個佈局
 */
public class Tabs1 extends TabActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //首先，應該聲明TabHost，然後用LayoutInflater 過濾出佈局來，給TabHost 加上含有Tab
        //頁面的FrameLayout
        TabHost tabHost = getTabHost();
        //LayoutInflater.from(this),從這個TabActivity獲取LayoutInflater,
        //R.lalyout.tabs1存放tab標籤佈局，
        //tabHost.getTabContentView通過Tabhost獲取存放tab的FrameLayout
        ////是否將inflate 拴繫到根佈局元素上
        LayoutInflater.from(this).inflate(R.layout.tabs1, tabHost.getTabContentView(), true);
        //在Tabhost創建一個標籤
        tabHost.addTab(tabHost.newTabSpec("tab1")
          //顯示的標題爲tab1
                .setIndicator("tab1")
                //設置標籤頁的佈局內容
                .setContent(R.id.view1));
        tabHost.addTab(tabHost.newTabSpec("tab3")
                .setIndicator("tab2")
                .setContent(R.id.view2));
        tabHost.addTab(tabHost.newTabSpec("tab3")
                .setIndicator("tab3")
                .setContent(R.id.view3));
    }
}

方式二通過intent/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.view;

import android.app.TabActivity;
import android.os.Bundle;
import android.widget.TabHost;
import android.content.Intent;

/**
 * An example of tab content that launches an activity via {@link android.widget.TabHost.TabSpec#setContent(android.content.Intent)}
 */
public class Tabs3 extends TabActivity {

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

        final TabHost tabHost = getTabHost();

        tabHost.addTab(tabHost.newTabSpec("tab1")
                .setIndicator("list")
                .setContent(new Intent(this, List1.class)));

        tabHost.addTab(tabHost.newTabSpec("tab2")
                .setIndicator("photo list")
                .setContent(new Intent(this, List8.class)));
       
        // This tab sets the intent flag so that it is recreated each time
        // the tab is clicked.
        tabHost.addTab(tabHost.newTabSpec("tab3")
                .setIndicator("destroy")
                .setContent(new Intent(this, Controls2.class)
                        .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)));
    }
}

方式三

/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.view;

import android.app.TabActivity;
import android.os.Bundle;
import android.widget.TabHost;
import android.widget.TextView;
import android.view.View;
import com.example.android.apis.R;

/**
 * Example of using a tab content factory for the content via {@link TabHost.TabSpec#setContent(android.widget.TabHost.TabContentFactory)}
 *
 * It also demonstrates using an icon on one of the tabs via {@link TabHost.TabSpec#setIndicator(CharSequence, android.graphics.drawable.Drawable)}
 *使一個選項卡的內容被選中後。使用這個如果你需要創建選項卡內容上的需求,即你不是顯示一個現有的視圖或啓動一個活動。
 */
public class Tabs2 extends TabActivity implements TabHost.TabContentFactory {

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

        final TabHost tabHost = getTabHost();
        tabHost.addTab(tabHost.newTabSpec("tab1")
                .setIndicator("tab1", getResources().getDrawable(R.drawable.star_big_on))
                .setContent(this));
        tabHost.addTab(tabHost.newTabSpec("tab2")
                .setIndicator("tab2")
                .setContent(this));
        tabHost.addTab(tabHost.newTabSpec("tab3")
                .setIndicator("tab3")
                .setContent(this));
    }

    /** {@inheritDoc} */
    public View createTabContent(String tag) {
        final TextView tv = new TextView(this);
        tv.setText("Content for tab with tag " + tag);
        return tv;
    }
}