教程实现用TabHost在安卓2

教程实现用TabHost在安卓2

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教程实现用TabHost在安卓2.2 + ViewPager和片段

本文介绍了教程实现用TabHost在安卓2.2 + ViewPager和片段的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

有一个简短的教程的人喜欢我，谁遇到了一些麻烦找到一种方法来实现TabHost和ViewPager，包括页面刷卡用手指选项卡中单击更改网页。所显示的解决方案是采用Android版本2.2 +兼容。

A short tutorial for people like me who had some trouble finding a way to implement TabHost and ViewPager, including page swiping with fingers and tab click to change pages. The shown solution is compatible with Android versions 2.2+.

它包括标签初始化，ViewPager有标签和页面滚动管理连接。

It includes Tabs initialization, ViewPager connected with Tabs and Page Scrolling management.

它的主要特点是优化早期版本的Andr​​oid（Froyo的，API版本8，Android 2.2的）和简单实现不同的目的。

Its main peculiarity is the optimization for earlier versions of Android (FROYO, API version 8, Android 2.2) and the simple implementation for different purposes.

我希望这将是有益的。

推荐答案

本教程包括4类和2的布局。它已经过测试与Android手机2.2，你可以只复制和;粘贴来试试吧。

The tutorial includes 4 classes and 2 layouts. It has been tested with an Android Phone 2.2 and you can just copy & paste to try it.

本教程是开放的意见和放大器;改进！

This tutorial is open to comments & improvements!

MainActivity.java （主要活动）：

package samples.tabhost.andreaoid.net;

import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;

public class MainActivity extends FragmentActivity implements OnTabChangeListener, OnPageChangeListener {

    MyPageAdapter pageAdapter;
    private ViewPager mViewPager;
    private TabHost mTabHost;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mViewPager = (ViewPager) findViewById(R.id.viewpager);

        // Tab Initialization
        initialiseTabHost();

        // Fragments and ViewPager Initialization
        List<Fragment> fragments = getFragments();
        pageAdapter = new MyPageAdapter(getSupportFragmentManager(), fragments);
        mViewPager.setAdapter(pageAdapter);
        mViewPager.setOnPageChangeListener(MainActivity.this);
    }

    // Method to add a TabHost
    private static void AddTab(MainActivity activity, TabHost tabHost, TabHost.TabSpec tabSpec) {
        tabSpec.setContent(new MyTabFactory(activity));
        tabHost.addTab(tabSpec);
    }

    // Manages the Tab changes, synchronizing it with Pages
    public void onTabChanged(String tag) {
        int pos = this.mTabHost.getCurrentTab();
        this.mViewPager.setCurrentItem(pos);
    }

    @Override
    public void onPageScrollStateChanged(int arg0) {
    }

    // Manages the Page changes, synchronizing it with Tabs
    @Override
    public void onPageScrolled(int arg0, float arg1, int arg2) {
        int pos = this.mViewPager.getCurrentItem();
        this.mTabHost.setCurrentTab(pos);
    }

    @Override
        public void onPageSelected(int arg0) {
    }

    private List<Fragment> getFragments(){
        List<Fragment> fList = new ArrayList<Fragment>();

        // TODO Put here your Fragments
        MySampleFragment f1 = MySampleFragment.newInstance("Sample Fragment 1");
        MySampleFragment f2 = MySampleFragment.newInstance("Sample Fragment 2");
        MySampleFragment f3 = MySampleFragment.newInstance("Sample Fragment 3");
        fList.add(f1);
        fList.add(f2);
        fList.add(f3);

        return fList;
    }

    // Tabs Creation
    private void initialiseTabHost() {
        mTabHost = (TabHost) findViewById(android.R.id.tabhost);
        mTabHost.setup();

        // TODO Put here your Tabs
        MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab1").setIndicator("Tab1"));
        MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab2").setIndicator("Tab2"));
        MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab3").setIndicator("Tab3"));

        mTabHost.setOnTabChangedListener(this);
    }
}

MyPageAdapter.java （片段经理）：

package samples.tabhost.andreaoid.net;

import java.util.List;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

public class MyPageAdapter extends FragmentPagerAdapter {
    private List<Fragment> fragments;

    public MyPageAdapter(FragmentManager fm, List<Fragment> fragments) {
        super(fm);
        this.fragments = fragments;
    }

    @Override
    public Fragment getItem(int position) {
        return this.fragments.get(position);
    }

    @Override
    public int getCount() {
        return this.fragments.size();
    }
}

MyTabFactory （制表经理）：

package samples.tabhost.andreaoid.net;

import android.content.Context;
import android.view.View;
import android.widget.TabHost.TabContentFactory;

public class MyTabFactory implements TabContentFactory {

    private final Context mContext;

    public MyTabFactory(Context context) {
        mContext = context;
    }

    public View createTabContent(String tag) {
        View v = new View(mContext);
        v.setMinimumWidth(0);
        v.setMinimumHeight(0);
        return v;
    }
}

MySampleFragment.java （单片段 - 包括用于演示）：

MySampleFragment.java (the single fragment - included for demonstration purposes):

package samples.tabhost.andreaoid.net;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class MySampleFragment extends Fragment {

    private static View mView;

    public static final MySampleFragment newInstance(String sampleText) {
        MySampleFragment f = new MySampleFragment();

        Bundle b = new Bundle();
        b.putString("bString", sampleText);
        f.setArguments(b);

    return f;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        mView = inflater.inflate(R.layout.sample_fragment, container, false);
        String sampleText = getArguments().getString("bString");

        TextView txtSampleText = (TextView) mView.findViewById(R.id.txtViewSample);
        txtSampleText.setText(sampleText);

        return mView;
    }
}

activity_main.xml 

<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" >

    <TabHost
        android:id="@android:id/tabhost"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical" >

            <TabWidget
                android:id="@android:id/tabs"
                android:orientation="horizontal"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_weight="0" />

                <FrameLayout
                    android:id="@android:id/tabcontent"
                    android:layout_width="0dp"
                    android:layout_height="0dp"
                    android:layout_weight="0" />

                    <android.support.v4.view.ViewPager
                        android:id="@+id/viewpager"
                        android:layout_width="fill_parent"
                        android:layout_height="wrap_content"
                        android:layout_gravity="bottom" />

            </LinearLayout>
    </TabHost>

</RelativeLayout>

sample_fragment.xml （你可以把这里的片段布局）：

sample_fragment.xml (you can put here your fragment layout):

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/txtViewSample"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:text="" />

</RelativeLayout>

这篇关于教程实现用TabHost在安卓2.2 + ViewPager和片段的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

08-02 00:29
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