assistant-android/app/src/main/java/com/gh/gamecenter/LibaoActivity.java

package com.gh.gamecenter;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.util.DisplayMetrics;
import android.view.Gravity;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.gh.base.BaseFragmentActivity;
import com.gh.common.util.DisplayUtils;
import com.gh.common.view.NoScrollableViewPager;
import com.gh.gamecenter.adapter.FragmentAdapter;
import com.gh.gamecenter.eventbus.EBReuse;
import com.gh.gamecenter.eventbus.EBUISwitch;
import com.gh.gamecenter.libao.Libao1Fragment;
import com.gh.gamecenter.libao.Libao2Fragment;
import com.gh.gamecenter.libao.Libao3Fragment;

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

import butterknife.BindView;
import de.greenrobot.event.EventBus;

/**
 * Created by khy on 2016/12/12.
 *
 */
public class LibaoActivity extends BaseFragmentActivity implements View.OnClickListener,
        ViewPager.OnPageChangeListener {

    @BindView(R.id.libao_vp_content) NoScrollableViewPager mLibaoVp;
    @BindView(R.id.libao_ll_top) LinearLayout mLibaoTopLl;
    @BindView(R.id.libao_slide_line) View mLibaoLine;
    @BindView(R.id.vp_tab) LinearLayout mTabLl;
    @BindView(R.id.libao_history_title) TextView mHistoryTitle;

    private TextView mZuixinTv;
    private TextView mGuanzhuTv;
    private TextView mChunhaoxiangTv;

    private int currentItem;
    private int width;

    private LinearLayout.LayoutParams lparams;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        View view = View.inflate(this, R.layout.activity_libao, null);
        init(view, "礼包中心");

        initTextView();

        List<Fragment> list = new ArrayList<>();
        list.add(new Libao1Fragment());
        list.add(new Libao2Fragment());
        list.add(new Libao3Fragment());
        mLibaoVp.setAdapter(new FragmentAdapter(getSupportFragmentManager(), list));
        mLibaoVp.addOnPageChangeListener(this);

        DisplayMetrics outMetrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
        width = outMetrics.widthPixels / 3;
        lparams = new LinearLayout.LayoutParams(width / 2,
                DisplayUtils.dip2px(this, 2));
        lparams.leftMargin = (int) (width * (currentItem + 0.25f));
        mLibaoLine.setLayoutParams(lparams);

        mLibaoTopLl.postDelayed(new Runnable() {
            @Override
            public void run() {
                EventBus.getDefault().post(new EBUISwitch("LibaoActivity", 0));
            }
        }, 100);

    }

    private void initTextView() {
        mZuixinTv = new TextView(this);
        mZuixinTv.setText("最新");
        if (currentItem == 0) {
            mZuixinTv.setTextColor(getResources().getColor(R.color.theme));
        } else {
            mZuixinTv.setTextColor(getResources().getColor(R.color.title));
        }
        mZuixinTv.setGravity(Gravity.CENTER);
        mZuixinTv.setOnClickListener(this);
        LinearLayout.LayoutParams lparams1 = new LinearLayout.LayoutParams(
                0, DisplayUtils.dip2px(this, 35));
        lparams1.weight = 1;
        mLibaoTopLl.addView(mZuixinTv, lparams1);

        mGuanzhuTv = new TextView(this);
        mGuanzhuTv.setText("关注");
        if (currentItem == 1) {
            mGuanzhuTv.setTextColor(getResources().getColor(R.color.theme));
        } else {
            mGuanzhuTv.setTextColor(getResources().getColor(R.color.title));
        }
        mGuanzhuTv.setGravity(Gravity.CENTER);
        mGuanzhuTv.setOnClickListener(this);
        LinearLayout.LayoutParams lparams2 = new LinearLayout.LayoutParams(
                0, DisplayUtils.dip2px(this, 35));
        lparams2.weight = 1;
        mLibaoTopLl.addView(mGuanzhuTv, lparams2);

        mChunhaoxiangTv = new TextView(this);
        mChunhaoxiangTv.setText("存号箱");
        if (currentItem == 2) {
            mChunhaoxiangTv.setTextColor(getResources().getColor(R.color.theme));
        } else {
            mChunhaoxiangTv.setTextColor(getResources().getColor(R.color.title));
        }
        mChunhaoxiangTv.setGravity(Gravity.CENTER);
        mChunhaoxiangTv.setOnClickListener(this);
        LinearLayout.LayoutParams lparams3 = new LinearLayout.LayoutParams(
                0, DisplayUtils.dip2px(this, 35));
        lparams3.weight = 1;
        mLibaoTopLl.addView(mChunhaoxiangTv, lparams3);
    }

    @Override
    public void onClick(View v) {
        if (v == mZuixinTv) {
            mLibaoVp.setCurrentItem(0);
        } else if (v == mGuanzhuTv) {
            mLibaoVp.setCurrentItem(1);
        } else if (v == mChunhaoxiangTv) {
            mLibaoVp.setCurrentItem(2);
        }
    }

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        if (positionOffset != 0) {
            lparams.leftMargin = (int) (width * (position + positionOffset + 0.25f));
            mLibaoLine.setLayoutParams(lparams);
        } else {
            if (currentItem != mLibaoVp.getCurrentItem()) {
                currentItem = mLibaoVp.getCurrentItem();
                EventBus.getDefault().post(new EBUISwitch("LibaoActivity", currentItem));
            }
        }
    }

    @Override
    public void onPageSelected(int position) {
        if (position == 0){
            mZuixinTv.setTextColor(getResources().getColor(R.color.theme));
            mGuanzhuTv.setTextColor(getResources().getColor(R.color.title));
            mChunhaoxiangTv.setTextColor(getResources().getColor(R.color.title));
        } else if (position == 1) {
            mZuixinTv.setTextColor(getResources().getColor(R.color.title));
            mGuanzhuTv.setTextColor(getResources().getColor(R.color.theme));
            mChunhaoxiangTv.setTextColor(getResources().getColor(R.color.title));
        } else if (position == 2) {
            mZuixinTv.setTextColor(getResources().getColor(R.color.title));
            mGuanzhuTv.setTextColor(getResources().getColor(R.color.title));
            mChunhaoxiangTv.setTextColor(getResources().getColor(R.color.theme));
        }
    }

    @Override
    public void onPageScrollStateChanged(int state) {

    }

    // 页面切换事件（查看历史礼包的页面）
    public void onEventMainThread(EBReuse reuse) {
        if ("openPage".equals(reuse.getType())) {  //TODO 设置新的TAB
            mLibaoTopLl.setVisibility(View.GONE);
            mLibaoLine.setVisibility(View.GONE);
            mHistoryTitle.setVisibility(View.VISIBLE);
            mHistoryTitle.setTextColor(getResources().getColor(R.color.hint));
            mLibaoVp.setScrollable(false);
        } else if ("closePage".equals(reuse.getType())) {
            mLibaoTopLl.setVisibility(View.VISIBLE);
            mLibaoLine.setVisibility(View.VISIBLE);
            mHistoryTitle.setVisibility(View.GONE);
            mLibaoVp.setScrollable(true);
        }
    }
}