ViewPager和TabHost结合
前几天看了网上关于ViewPager实现滑动切换的效果。回来试了一下，发现效果确实不错，但是切换的几个页面只是调用了不同的layout，实际上还是在一个Activity里面，对功能编写就不方便了。所以，我想到了TabHost和ViewPager结合，使用TabHost切换Activity，使用ViewPager切换界面，从而晚上切换效果。废话少说，直接看代码吧。
首先是布局的xml
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android :id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TabWidget
android:id="@android :id/tabs"
android:layout_width="wrap_content"
android:layout_height="0dip" >
</TabWidget>
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="40dip"
android:background="@drawable/title" >
<TextView
android:id="@+id/text1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.0"
android:gravity="center"
android:text="@string/black"
android:textColor="#FFFFFF"
android:textSize="22.0dip" />
<TextView
android:id="@+id/text2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.0"
android:gravity="center"
android:text="@string/gray"
android:textColor="#FFFFFF"
android:textSize="22.0dip" />
<TextView
android:id="@+id/text3"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.0"
android:gravity="center"
android:text="@string/white"
android:textColor="#FFFFFF"
android:textSize="22.0dip" />
</LinearLayout>
<ImageView
android:id="@+id/cursor"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:scaleType="matrix"
android:src="@drawable/a" />
<android.support.v4.view.ViewPager
android:id="@+id/vPager"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1.0"
android:background="#000000"
android:flipInterval="30"
android:persistentDrawingCache="animation" />
<FrameLayout
android:id="@android :id/tabcontent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" >
</FrameLayout>
</LinearLayout>
</TabHost>
然后是java文件
package com.wcs233;
import java.util.ArrayList;
import java.util.List;
import android.app.LocalActivityManager;
import android.app.TabActivity;
import android.content.Context;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.TabHost;
import android.widget.TextView;
public class ConfigTabActivity extends TabActivity {
//页卡内容
private ViewPager mPager;
// Tab页面列表
private List<View> listViews;
// 动画图片
private ImageView cursor;
// 页卡头标
private TextView t1, t2, t3;
// 动画图片偏移量
private int offset = 0;
// 当前页卡编号
private int currIndex = 0;
// 动画图片宽度
private int bmpW;
private LocalActivityManager manager = null;
private final static String TAG = "ConfigTabActivity";
private final Context context = ConfigTabActivity.this;
private TabHost mTabHost;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "---onCreate---");
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.config);
mTabHost = getTabHost();
mTabHost.addTab(mTabHost.newTabSpec("A").setIndicator(
"").setContent(
new Intent(this, A.class)));
mTabHost.addTab(mTabHost.newTabSpec("B").setIndicator(
"").setContent(
new Intent(this, B.class)));
mTabHost.addTab(mTabHost.newTabSpec("C").setIndicator(
"").setContent(
new Intent(this, C.class)));
mTabHost.setCurrentTab(0);
manager = new LocalActivityManager(this, true);
manager.dispatchCreate(savedInstanceState);
InitImageView();
InitTextView();
InitViewPager();
}
/**
* 初始化头标
*/
private void InitTextView() {
t1 = (TextView) findViewById(R.id.text1);
t2 = (TextView) findViewById(R.id.text2);
t3 = (TextView) findViewById(R.id.text3);
t1.setOnClickListener(new MyOnClickListener(0));
t2.setOnClickListener(new MyOnClickListener(1));
t3.setOnClickListener(new MyOnClickListener(2));
}
/**
* 初始化ViewPager
*/
private void InitViewPager() {
mPager = (ViewPager) findViewById(R.id.vPager);
listViews = new ArrayList<View>();
MyPagerAdapter mpAdapter = new MyPagerAdapter(listViews);
Intent intent = new Intent(context, A.class);
listViews.add(getView("Black", intent));
Intent intent2 = new Intent(context, B.class);
listViews.add(getView("Gray", intent2));
Intent intent3 = new Intent(context, C.class);
listViews.add(getView("White", intent3));
mPager.setAdapter(mpAdapter);
mPager.setCurrentItem(0);
mPager.setOnPageChangeListener(new MyOnPageChangeListener());
}
/**
* 初始化动画
*/
private void InitImageView() {
cursor = (ImageView) findViewById(R.id.cursor);
bmpW = BitmapFactory.decodeResource(getResources(), R.drawable.a)
.getWidth();// 获取图片宽度
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int screenW = dm.widthPixels;// 获取分辨率宽度
offset = (screenW / 3 - bmpW) / 2;// 计算偏移量
Matrix matrix = new Matrix();
matrix.postTranslate(offset, 0);
cursor.setImageMatrix(matrix);// 设置动画初始位置
}
/**
* ViewPager适配器
*/
public class MyPagerAdapter extends PagerAdapter {
public List<View> mListViews;
public MyPagerAdapter(List<View> mListViews) {
this.mListViews = mListViews;
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView(mListViews.get(arg1));
}
@Override
public void finishUpdate(View arg0) {
}
@Override
public int getCount() {
return mListViews.size();
}
@Override
public Object instantiateItem(View arg0, int arg1) {
((ViewPager) arg0).addView(mListViews.get(arg1), 0);
return mListViews.get(arg1);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == (arg1);
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {
}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View arg0) {
}
}
/**
* 头标点击监听
*/
public class MyOnClickListener implements View.OnClickListener {
private int index = 0;
public MyOnClickListener(int i) {
index = i;
}
@Override
public void onClick(View v) {
mPager.setCurrentItem(index);
}
};
/**
* 页卡切换监听
*/
public class MyOnPageChangeListener implements OnPageChangeListener {
int one = offset * 2 + bmpW;// 页卡1 -> 页卡2 偏移量
int two = one * 2;// 页卡1 -> 页卡3 偏移量
@Override
public void onPageSelected(int arg0) {
Animation animation = null;
Intent intent = new Intent();
switch (arg0) {
case 0:
Log.d(TAG, "---0---");
mTabHost.setCurrentTab(0);
if (currIndex == 1) {
animation = new TranslateAnimation(one, 0, 0, 0);
} else if (currIndex == 2) {
animation = new TranslateAnimation(two, 0, 0, 0);
}
break;
case 1:
Log.d(TAG, "---1---");
mTabHost.setCurrentTab(1);
if (currIndex == 0) {
animation = new TranslateAnimation(offset, one, 0, 0);
} else if (currIndex == 2) {
animation = new TranslateAnimation(two, one, 0, 0);
}
break;
case 2:
Log.d(TAG, "---2---");
mTabHost.setCurrentTab(2);
if (currIndex == 0) {
animation = new TranslateAnimation(offset, two, 0, 0);
} else if (currIndex == 1) {
animation = new TranslateAnimation(one, two, 0, 0);
}
break;
}
currIndex = arg0;
animation.setFillAfter(true);// True:图片停在动画结束位置
animation.setDuration(300);
cursor.startAnimation(animation);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
}
private View getView(String id,Intent intent)
{
return manager.startActivity(id, intent).getDecorView();
}
}
至于每个单独页面的layout和java，大家就根据自己的需求写吧。