首页 > 代码库 > android新手关于左右滑动的问题，布局把<android.support.v4.view.ViewPager/><ImageView/> 放在上面就不行了。
android新手关于左右滑动的问题，布局把<android.support.v4.view.ViewPager/><ImageView/> 放在上面就不行了。
====================问题描述====================
main.xml代码：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:umadsdk="http://schemas.android.com/apk/res/com.LoveBus"
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="100.0dip"
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="页卡1"
android:textColor="#000000"
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="页卡2"
android:textColor="#000000"
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="页卡3"
android:textColor="#000000"
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="http://www.mamicode.com/@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" />
</LinearLayout>
lay1.xml代码：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#158684" >
<Button android:id="@+id/lay1_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="lay1的按钮"/>
</LinearLayout>
lay2.xml代码与lay3.xml代码和lay1代码差不多
activity代码：
package com.demo;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Context;
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.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
/**
* Tab页面手势滑动切换以及动画效果
*
* @author D.Winter
*
*/
public class MainActivity extends Activity {
// ViewPager是google SDk中自带的一个附加包的一个类，可以用来实现屏幕间的切换。
// android-support-v4.jar
private ViewPager mPager;// 页卡内容
private List<View> listViews; // Tab页面列表
private ImageView cursor;// 动画图片
private TextView t1, t2, t3;// 页卡头标
private int offset = 0;// 动画图片偏移量
private int currIndex = 0;// 当前页卡编号
private int baseNum = 3000;
private int nowbaseNum = 3000;
private int bmpW;// 动画图片宽度
private LayoutInflater inflater;
private View view1, view2, view3;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
InitLayout();
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>();
LayoutInflater mInflater = getLayoutInflater();
listViews.add(view1);
listViews.add(view2);
listViews.add(view3);
mPager.setAdapter(new MyPagerAdapter(listViews));
mPager.setCurrentItem(baseNum);
mPager.setOnPageChangeListener(new MyOnPageChangeListener());
}
private void InitLayout() {
inflater = (LayoutInflater) this
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// 第一个页面的布局
view1 = inflater.inflate(R.layout.lay1, null, false);
Button button = (Button) view1.findViewById(R.id.lay1_button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("mxt", "点击了lay1按钮");
}
});
// 第二个页面的布局
view2 = inflater.inflate(R.layout.lay2, null, false);
Button button2 = (Button) view2.findViewById(R.id.lay2_button);
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("mxt", "点击了lay2按钮");
}
});
// 第三个页面的布局
view3 = inflater.inflate(R.layout.lay3, null, false);
Button button3 = (Button) view3.findViewById(R.id.lay3_button);
button3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("mxt", "点击了lay3按钮");
}
});
}
/**
* 初始化动画
*/
private void InitImageView() {
cursor = (ImageView) findViewById(R.id.cursor);// 页卡下面的横条
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) {
Log.i("POS", "执行了destroyItem");
// if (arg1 >= mListViews.size()-1) {
// int newPosition = arg1%mListViews.size();
// arg1 = newPosition;
// ((ViewPager) arg0).removeView(mListViews.get(arg1));
// }
}
@Override
public void finishUpdate(View arg0) {
}
@Override
public int getCount() {
// return mListViews.size();
return Integer.MAX_VALUE;
}
@Override
public Object instantiateItem(View arg0, int arg1) {
Log.i("POS", "执行了instantiateItem");
if (arg1 >= mListViews.size() - 1) {
int newPosition = arg1 % mListViews.size();
arg1 = newPosition;
}
try {
((ViewPager) arg0).addView(mListViews.get(arg1), 0);
} catch (Exception e) {
e.printStackTrace();
}
return mListViews.get(arg1);
}
// public Object instantiateItem(View container, int position) {
// // TODO Auto-generated method stub
// return super.instantiateItem(container, position);
// }
@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) {
if (currIndex != index) {
switch (index) {
case 0:
if (currIndex == 1) {
mPager.setCurrentItem(nowbaseNum -1);
} else if (currIndex == 2) {
mPager.setCurrentItem(nowbaseNum +1);
}
break;
case 1:
if (currIndex == 0) {
mPager.setCurrentItem(nowbaseNum +1);
} else if (currIndex == 2) {
mPager.setCurrentItem(nowbaseNum -1);
}
break;
case 2:
if (currIndex == 1) {
mPager.setCurrentItem(nowbaseNum +1);
} else if (currIndex == 0) {
mPager.setCurrentItem(nowbaseNum -1);
}
break;
default:
break;
}
}
}
};
/**
* 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;
int pos = arg0 % listViews.size();
nowbaseNum = arg0;
switch (pos) {
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;
}
currIndex = pos;
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) {
}
}
}
====================解决方案1====================
代码太多不想看。。帮你顶一下吧。。
android新手关于左右滑动的问题，布局把<android.support.v4.view.ViewPager/><ImageView/> 放在上面就不行了。
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