package com.demo;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
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.view.LayoutInflater;
import android.view.View;
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 bmpW;// 动画图片宽度
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
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(mInflater.inflate(R.layout.lay2, null));
listViews.add(mInflater.inflate(R.layout.lay1, null));
listViews.add(mInflater.inflate(R.layout.lay3, null));
mPager.setAdapter(new MyPagerAdapter(listViews));
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) {
if (arg1 < 3) {
((ViewPager) arg0).addView(mListViews.get(arg1 % 3), 0);
}
// 测试页卡1内的按钮事件
if (arg1 == 0) {
Button btn = (Button) arg0.findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
new AlertDialog.Builder(MainActivity.this)
.setTitle("说明")
.setMessage("单个页卡内按钮事件测试")
.setNegativeButton("确定",
new DialogInterface.OnClickListener() {
public void onClick(
DialogInterface dialog,
int which) {
}
}).show();
}
});
}
if (arg1 == 1) {
Button btn = (Button) arg0.findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
new AlertDialog.Builder(MainActivity.this)
.setTitle("说明")
.setMessage("单个页卡内按钮事件测试")
.setNegativeButton("确定",
new DialogInterface.OnClickListener() {
public void onClick(
DialogInterface dialog,
int which) {
}
}).show();
}
});
}
if (arg1 == 2) {
Button btn = (Button) arg0.findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
new AlertDialog.Builder(MainActivity.this)
.setTitle("说明")
.setMessage("单个页卡内按钮事件测试")
.setNegativeButton("确定",
new DialogInterface.OnClickListener() {
public void onClick(
DialogInterface dialog,
int which) {
}
}).show();
}
});
}
return mListViews.get(arg1 % 3);
}
@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;
}
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
public void onPageSelected(int arg0) {
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;
}
currIndex = arg0;
animation.setFillAfter(true);// True:图片停在动画结束位置
animation.setDuration(300);
cursor.startAnimation(animation);
}
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
public void onPageScrollStateChanged(int arg0) {
}
}
}
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