Android控件学习（4）：ViewPager和TabHost结合Java代码
import java.util.ArrayList;
import java.util.List;
import android.app.LocalActivityManager;
import android.app.TabActivity;
import android.content.Context;
import android.content.Intent;
importandroid.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
importandroid.support.v4.view.ViewPager;
importandroid.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.view.Window;
importandroid.view.animation.Animation;
importandroid.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.TabHost;
import android.widget.TextView;
public class AniTestActivity extends TabActivity {
//页卡内容
private ViewPager mPager;
// Tab页面列表
private List 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 = AniTestActivity.this;
private TabHost mTabHost;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "---onCreate---");
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
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();
}
private void InitTextView() {
t1 = (TextView) findViewById(R.id.text1);
t2 = (TextView) findViewById(R.id.text2);
t3 = (TextView) findViewById(R.id.text3);
t1.setOnClickListener(newMyOnClickListener(0));
t2.setOnClickListener(newMyOnClickListener(1));
t3.setOnClickListener(newMyOnClickListener(2));
}
private void InitViewPager() {
mPager = (ViewPager) findViewById(R.id.vPager);
listViews = new ArrayList();
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(newMyOnPageChangeListener());
}
private void InitImageView() {
cursor = (ImageView) findViewById(R.id.cursor);
bmpW = BitmapFactory.decodeResource(getResources(), R.drawable.a4)
.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
}
public class MyPagerAdapter extends PagerAdapter {
public List mListViews;
publicMyPagerAdapter(List 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) {
}
}
public class MyOnClickListener implementsView.OnClickListener {
private int index = 0;
public MyOnClickListener(int i) {
index = i;
}
@Override
public void onClick(View v) {
mPager.setCurrentItem(index);
}
};
public class MyOnPageChangeListener implementsOnPageChangeListener {
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 = newTranslateAnimation(one, 0, 0, 0);
} else if (currIndex == 2) {
animation = newTranslateAnimation(two, 0, 0, 0);
}
break;
case 1:
Log.d(TAG, "---1---");
mTabHost.setCurrentTab(1);
if (currIndex == 0) {
animation = newTranslateAnimation(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 = newTranslateAnimation(offset, two, 0, 0);
} else if (currIndex == 1) {
animation = newTranslateAnimation(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();
}
}