仿微信的滑動和改變字體圖標顏色

activity_main.xml

tab01.xml

tab02.xml

tab03.xml

tab04.xml

顏色

 #558B2F

MainActivity.java

package com.example.weixintest01;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.graphics.Color;
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.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener {

    private ViewPager mPager;
    List mlist = new ArrayList();

    private LinearLayout mLayout1;
    private LinearLayout mLayout2;
    private LinearLayout mLayout3;
    private LinearLayout mLayout4;

    private ImageView img1;
    private ImageView img2;
    private ImageView img3;
    private ImageView img4;

    private TextView tv1;
    private TextView tv2;
    private TextView tv3;
    private TextView tv4;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);
        init();

        initEvent();
    }

    private void initEvent() {
        mLayout1.setOnClickListener(this);
        mLayout2.setOnClickListener(this);
        mLayout3.setOnClickListener(this);
        mLayout4.setOnClickListener(this);
        mPager.setAdapter(adapter);//設置適配器
        mPager.setOnPageChangeListener(new OnPageChangeListener() {//設置頁面滑動監聽器

            @Override
            public void onPageSelected(int arg0) {
                int current = mPager.getCurrentItem();
                resetImage();
                switch (current) {
                case 0:
  //設置按下去的圖片和字體顏色                   img1.setImageResource(R.drawable.tab_weixin_pressed);
                    tv1.setTextColor(Color.GREEN);
                    break;
                case 1:
                    img2.setImageResource(R.drawable.tab_address_pressed);
                    tv2.setTextColor(Color.GREEN);
                    break;
                case 2:
                    img3.setImageResource(R.drawable.tab_find_frd_pressed);
                    tv3.setTextColor(Color.GREEN);
                    break;
                case 3:
                    img4.setImageResource(R.drawable.tab_settings_pressed);
                    tv4.setTextColor(Color.GREEN);
                    break;
                default:
                    break;
                }
            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {

            }
        });
    }

    private void init() {
        // 實例化ViewPager
        mPager = (ViewPager) findViewById(R.id.content);
        // 實例化bottom布局
        mLayout1 = (LinearLayout) findViewById(R.id.tab_weixin);
        mLayout2 = (LinearLayout) findViewById(R.id.tab_address);
        mLayout3 = (LinearLayout) findViewById(R.id.tab_friend);
        mLayout4 = (LinearLayout) findViewById(R.id.tab_setting);

        // 實例化bottom的imageView
        img1 = (ImageView) findViewById(R.id.bg_img1);
        img2 = (ImageView) findViewById(R.id.bg_img2);
        img3 = (ImageView) findViewById(R.id.bg_img3);
        img4 = (ImageView) findViewById(R.id.bg_img4);

        tv1 = (TextView) findViewById(R.id.tv1);
        tv2 = (TextView) findViewById(R.id.tv2);
        tv3 = (TextView) findViewById(R.id.tv3);
        tv4 = (TextView) findViewById(R.id.tv4);

        // 加載布局
        LayoutInflater inflater = LayoutInflater.from(this);
        View tab01 = inflater.inflate(R.layout.tab01, null);
        View tab02 = inflater.inflate(R.layout.tab02, null);
        View tab03 = inflater.inflate(R.layout.tab03, null);
        View tab04 = inflater.inflate(R.layout.tab04, null);

        // 添加到容器中
        mlist.add(tab01);
        mlist.add(tab02);
        mlist.add(tab03);
        mlist.add(tab04);

    }

    PagerAdapter adapter = new PagerAdapter() {

        // 初始化布局
        @Override
        public Object instantiateItem(ViewGroup container, int position) {
        //添加當前位置的布局
            container.addView(mlist.get(position));
            return mlist.get(position);
        }

        // 移除當前位置的布局
        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            container.removeView(mlist.get(position));
        }

        // 獲得容器中的個數
        @Override
        public int getCount() {
            return mlist.size();
        }

        // 判斷View==object
        @Override
        public boolean isViewFromObject(View arg0, Object arg1) {
            return arg0 == arg1;
        }
    };

    // 布局的點擊事件
    @Override
    public void onClick(View v) {

        resetImage();//前提將所有的圖片設置為暗色，字體顏色設置為白色，然後在下面的點擊事件中重新設置圖片和字體顏色
        switch (v.getId()) {
        case R.id.tab_weixin:
            mPager.setCurrentItem(0);
            img1.setImageResource(R.drawable.tab_weixin_pressed);
            tv1.setTextColor(Color.GREEN);
            break;
        case R.id.tab_address:
            mPager.setCurrentItem(1);
            img2.setImageResource(R.drawable.tab_address_pressed);
            tv2.setTextColor(Color.GREEN);
            break;
        case R.id.tab_friend:
            mPager.setCurrentItem(2);
            img3.setImageResource(R.drawable.tab_find_frd_pressed);
            tv3.setTextColor(Color.GREEN);
            break;
        case R.id.tab_setting:
            mPager.setCurrentItem(3);
            img4.setImageResource(R.drawable.tab_settings_pressed);
            tv4.setTextColor(Color.GREEN);
            break;
        default:
            break;
        }
    }

//設置圖片和字體的顏色
    private void resetImage() {
        img1.setImageResource(R.drawable.tab_weixin_normal);
        img2.setImageResource(R.drawable.tab_address_normal);
        img3.setImageResource(R.drawable.tab_find_frd_normal);
        img4.setImageResource(R.drawable.tab_settings_normal);

        tv1.setTextColor(Color.WHITE);
        tv2.setTextColor(Color.WHITE);
        tv3.setTextColor(Color.WHITE);
        tv4.setTextColor(Color.WHITE);

    }
}