- 论坛徽章:
- 80
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仿微博的效果,
这个标题就固定了,而且可以左右滑动,也有下面的横线,来指示页卡。方法和上面的差不多,区别在于这个横线需要我们自己来做,其实就是一个图片。这个例子是网上的一篇文章,看代码:
主Activity:- package com.example.viewpagerdemo;
-
- import java.util.ArrayList;
- import java.util.List;
- import android.app.Activity;
- import android.graphics.BitmapFactory;
- import android.graphics.Matrix;
- import android.os.Bundle;
- 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.view.LayoutInflater;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.view.animation.Animation;
- import android.view.animation.TranslateAnimation;
- import android.view.ViewGroup;
- import android.widget.ImageView;
- import android.widget.TextView;
- import android.widget.Toast;
-
- public class WeiBoActivity extends Activity {
-
- private ViewPager viewPager;//页卡内容
- private ImageView imageView;// 动画图片
- private TextView textView1,textView2,textView3;
- private List<View> views;// Tab页面列表
- private int offset = 0;// 动画图片偏移量
- private int currIndex = 0;// 当前页卡编号
- private int bmpW;// 动画图片宽度
- private View view1,view2,view3;//各个页卡
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.weibo);
- InitImageView();
- InitTextView();
- InitViewPager();
- }
-
- private void InitViewPager() {
- viewPager=(ViewPager) findViewById(R.id.vPager);
- views=new ArrayList<View>();
- LayoutInflater inflater=getLayoutInflater();
- view1=inflater.inflate(R.layout.lay1, null);
- view2=inflater.inflate(R.layout.lay2, null);
- view3=inflater.inflate(R.layout.lay3, null);
- views.add(view1);
- views.add(view2);
- views.add(view3);
- viewPager.setAdapter(new MyViewPagerAdapter(views));
- viewPager.setCurrentItem(0);
- viewPager.setOnPageChangeListener(new MyOnPageChangeListener());
- }
- /**
- * 初始化头标
- */
-
- private void InitTextView() {
- textView1 = (TextView) findViewById(R.id.text1);
- textView2 = (TextView) findViewById(R.id.text2);
- textView3 = (TextView) findViewById(R.id.text3);
-
- textView1.setOnClickListener(new MyOnClickListener(0));
- textView2.setOnClickListener(new MyOnClickListener(1));
- textView3.setOnClickListener(new MyOnClickListener(2));
- }
-
- /**
- 2 * 初始化动画,这个就是页卡滑动时,下面的横线也滑动的效果,在这里需要计算一些数据
- 3 */
-
- private void InitImageView() {
- imageView= (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);
- imageView.setImageMatrix(matrix);// 设置动画初始位置
- }
- <IMG alt="" src="http://img.my.csdn.net/uploads/201211/10/1352554452_1685.jpg">
- /**
- *
- * 头标点击监听 3 */
- private class MyOnClickListener implements OnClickListener{
- private int index=0;
- public MyOnClickListener(int i){
- index=i;
- }
- public void onClick(View v) {
- viewPager.setCurrentItem(index);
- }
-
- }
-
- public class MyViewPagerAdapter extends PagerAdapter{
- private List<View> mListViews;
-
- public MyViewPagerAdapter(List<View> mListViews) {
- this.mListViews = mListViews;
- }
-
- @Override
- public void destroyItem(ViewGroup container, int position, Object object) {
- container.removeView(mListViews.get(position));
- }
-
-
- @Override
- public Object instantiateItem(ViewGroup container, int position) {
- container.addView(mListViews.get(position), 0);
- return mListViews.get(position);
- }
-
- @Override
- public int getCount() {
- return mListViews.size();
- }
-
- @Override
- public boolean isViewFromObject(View arg0, Object arg1) {
- return arg0==arg1;
- }
- }
-
- 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
- public void onPageScrollStateChanged(int arg0) {
-
-
- }
-
- public void onPageScrolled(int arg0, float arg1, int arg2) {
-
-
- }
-
- public void onPageSelected(int arg0) {
- /*两种方法,这个是一种,下面还有一种,显然这个比较麻烦
- Animation animation = null;
- switch (arg0) {
- case 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:
- if (currIndex == 0) {
- animation = new TranslateAnimation(offset, one, 0, 0);
- } else if (currIndex == 2) {
- animation = new TranslateAnimation(two, one, 0, 0);
- }
- break;
- case 2:
- if (currIndex == 0) {
- animation = new TranslateAnimation(offset, two, 0, 0);
- } else if (currIndex == 1) {
- animation = new TranslateAnimation(one, two, 0, 0);
- }
- break;
-
- }
- */
- Animation animation = new TranslateAnimation(one*currIndex, one*arg0, 0, 0);//显然这个比较简洁,只有一行代码。
- currIndex = arg0;
- animation.setFillAfter(true);// True:图片停在动画结束位置
- animation.setDuration(300);
- imageView.startAnimation(animation);
- Toast.makeText(WeiBoActivity.this, "您选择了"+ viewPager.getCurrentItem()+"页卡", Toast.LENGTH_SHORT).show();
- }
-
- }
- }
复制代码 布局文件- <?xml version="1.0" encoding="utf-8"?>
- lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical" >
-
- <LinearLayout
- android:id="@+id/linearLayout1"
- android:layout_width="fill_parent"
- android:layout_height="40.0dip"
- android:background="#FFFFFF" >
-
- <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=" @我"
- android:textColor="#000000"
- android:textSize="20.0dip" />
-
- <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="评论"
- android:textColor="#000000"
- android:textSize="20.0dip" />
-
- <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="私信"
- android:textColor="#000000"
- android:textSize="20.0dip" />
- </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="0dp"
- android:layout_gravity="center"
- android:layout_weight="1.0"
- android:background="#000000"
- android:flipInterval="30"
- android:persistentDrawingCache="animation" />
- lt;/LinearLayout>
复制代码
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