左右滑动的Tab

来源：互联网发布：剑3少林捏脸数据编辑：程序博客网时间：2024/05/17 01:26

. [文件] activity_main.ml

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<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
 
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal"
        android:padding="5dp">
 
        <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="焦点推荐"
            android:textColor="#000"
            android:textSize="15dp"/>
 
        <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="今日关注"
            android:textColor="#000"
            android:textSize="15dp"/>
 
        <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="新闻资讯"
            android:textColor="#000"
            android:textSize="15dp"/>
 
        <TextView
            android:id="@+id/text4"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="1.0"
            android:gravity="center"
            android:text="专题活动"
            android:textColor="#000"
            android:textSize="15dp"/>
    </LinearLayout>
 
    <ImageView
        android:id="@+id/cursor"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:scaleType="matrix"
        android:src="@drawable/ic_xian_red"/>
 
    <android.support.v4.view.ViewPager
        android:id="@+id/tabpager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_gravity="center"
        android:layout_weight="1">
    </android.support.v4.view.ViewPager>
 
</LinearLayout>

2. [文件] MainActivity.java

packagecom.example.demo;
 
importjava.util.ArrayList;
importjava.util.List;
 
importandroid.app.Activity;
importandroid.app.LocalActivityManager;
importandroid.content.Intent;
importandroid.graphics.BitmapFactory;
importandroid.graphics.Color;
importandroid.graphics.Matrix;
importandroid.os.Bundle;
importandroid.support.v4.view.PagerAdapter;
importandroid.support.v4.view.ViewPager;
importandroid.support.v4.view.ViewPager.OnPageChangeListener;
importandroid.util.DisplayMetrics;
importandroid.util.Log;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.view.ViewGroup;
importandroid.view.animation.Animation;
importandroid.view.animation.TranslateAnimation;
importandroid.widget.ImageView;
importandroid.widget.TextView;
 
publicclassMainActivity extendsActivity {
     
    privateViewPager mViewPager;// 页卡内容
    privateImageView mImageView;// 动画图片
    privateTextView tv1, tv2, tv3, tv4;
    privateintoffset = 0;// 动画图片偏移量
    privateintcurrIndex = 0;// 当前页卡编号
    privateintbmpWidth;// 动画图片宽度
    privateView view1, view2, view3, view4;// 各个页卡
    LocalActivityManager mLocalActivityManager = null;
 
    @Override
    protectedvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mLocalActivityManager = newLocalActivityManager(this,true);
        mLocalActivityManager.dispatchCreate(savedInstanceState);
        initImageView();
        initTextView();
        initViewPager();
    }
 
    privatevoidinitViewPager() {
        mViewPager = (ViewPager) findViewById(R.id.tabpager);
        List<View> views = newArrayList<View>();// Tab页面列表
        Intent intentA = newIntent(MainActivity.this, JDActivity.class);
        views.add(getView("A", intentA));
        Intent intentB = newIntent(MainActivity.this, JRActivity.class);
        views.add(getView("B", intentB));
        Intent intentC = newIntent(MainActivity.this, XWActivity.class);
        views.add(getView("C", intentC));
        Intent intentD = newIntent(MainActivity.this, ZTActivity.class);
        views.add(getView("D", intentD));
        mViewPager.setAdapter(newTabViewPagerAdapter(views));
        mViewPager.setCurrentItem(0);
        mViewPager.setOnPageChangeListener(newMyOnPageChangeListener());
    }
 
    /**
     * 通过activity获取视图
     *
     */
    privateView getView(String id, Intent intent) {
        returnmLocalActivityManager.startActivity(id, intent).getDecorView();
    }
 
    /**
     * 初始化头标
     */
 
    privatevoidinitTextView() {
        tv1 = (TextView) findViewById(R.id.text1);
        tv2 = (TextView) findViewById(R.id.text2);
        tv3 = (TextView) findViewById(R.id.text3);
        tv4 = (TextView) findViewById(R.id.text4);
        tv1.setOnClickListener(newTabOnClickListener(0));
        tv2.setOnClickListener(newTabOnClickListener(1));
        tv3.setOnClickListener(newTabOnClickListener(2));
        tv4.setOnClickListener(newTabOnClickListener(3));
    }
 
    /**
     * 初始化动画
     */
 
    privatevoidinitImageView() {
        mImageView = (ImageView) findViewById(R.id.cursor);
        bmpWidth = BitmapFactory.decodeResource(getResources(),
                R.drawable.ic_xian_red).getWidth();// 获取图片宽度
        DisplayMetrics dm = newDisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        intscreenW = dm.widthPixels;// 获取分辨率宽度
        offset = (screenW / 4- bmpWidth) / 2;// 计算偏移量
        Matrix matrix = newMatrix();
        matrix.postTranslate(offset,0);
        mImageView.setImageMatrix(matrix);// 设置动画初始位置
    }
 
    /**
     *
     * 头标点击监听
     */
    privateclassTabOnClickListener implementsOnClickListener {
        privateintindex = 0;
 
        publicTabOnClickListener(inti) {
            index = i;
        }
 
        publicvoidonClick(View v) {
            mViewPager.setCurrentItem(index);
        }
 
    }
 
    publicclassTabViewPagerAdapter extendsPagerAdapter {
        privateList<View> mListViews;
 
        publicTabViewPagerAdapter(List<View> mListViews) {
            this.mListViews = mListViews;
        }
 
        @Override
        publicvoiddestroyItem(ViewGroup container, intposition, Object object) {
            container.removeView(mListViews.get(position));
        }
 
        @Override
        publicObject instantiateItem(ViewGroup container, intposition) {
            container.addView(mListViews.get(position),0);
            returnmListViews.get(position);
        }
 
        @Override
        publicintgetCount() {
            returnmListViews.size();
        }
 
        @Override
        publicbooleanisViewFromObject(View arg0, Object arg1) {
            returnarg0 == arg1;
        }
    }
 
    publicclassMyOnPageChangeListener implementsOnPageChangeListener {
 
        intone = offset * 2+ bmpWidth;// 页卡1 -> 页卡2 偏移量
        inttwo = one * 2;// 页卡1 -> 页卡3 偏移量
 
        publicvoidonPageScrollStateChanged(intarg0) {
 
        }
 
        publicvoidonPageScrolled(intarg0,floatarg1,intarg2) {
 
        }
 
        publicvoidonPageSelected(intarg0) {
            Animation animation = null;
            switch(arg0) {
            case0:
                Log.d("TAG","0");
                tv1.setTextColor(Color.RED);
                tv2.setTextColor(Color.BLACK);
                tv3.setTextColor(Color.BLACK);
                tv4.setTextColor(Color.BLACK);
                break;
            case1:
                Log.d("TAG","1");
                tv1.setTextColor(Color.BLACK);
                tv2.setTextColor(Color.RED);
                tv3.setTextColor(Color.BLACK);
                tv4.setTextColor(Color.BLACK);
                break;
            case2:
                Log.d("TAG","2");
                tv1.setTextColor(Color.BLACK);
                tv2.setTextColor(Color.BLACK);
                tv3.setTextColor(Color.RED);
                tv4.setTextColor(Color.BLACK);
                break;
            case3:
                Log.d("TAG","3");
                tv1.setTextColor(Color.BLACK);
                tv2.setTextColor(Color.BLACK);
                tv3.setTextColor(Color.BLACK);
                tv4.setTextColor(Color.RED);
                break;
            }
            animation = newTranslateAnimation(one * currIndex, one * arg0, 0,
                    0);
            currIndex = arg0;
            animation.setFillAfter(true);// True:图片停在动画结束位置
            animation.setDuration(100);
            mImageView.startAnimation(animation);
            Log.d("ReDianActivity:","您选择了"+ mViewPager.getCurrentItem()
                    +"页卡");
        }
    }
}

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