DoubanMeiziPageActivity.java

package com.hotbitmapgg.moequest.module.douban;

import butterknife.Bind;
import com.hotbitmapgg.moequest.R;
import com.hotbitmapgg.moequest.base.RxBaseActivity;
import com.hotbitmapgg.moequest.entity.douban.DoubanMeizi;
import com.hotbitmapgg.moequest.module.commonality.MeiziDetailsFragment;
import com.hotbitmapgg.moequest.rx.RxBus;
import com.hotbitmapgg.moequest.utils.ConstantUtil;
import com.hotbitmapgg.moequest.utils.GlideDownloadImageUtil;
import com.hotbitmapgg.moequest.utils.ImmersiveUtil;
import com.hotbitmapgg.moequest.utils.ShareUtil;
import com.hotbitmapgg.moequest.widget.DepthTransFormes;
import com.jakewharton.rxbinding.view.RxMenuItem;
import com.tbruyelle.rxpermissions.RxPermissions;
import io.realm.Realm;
import io.realm.RealmResults;
import java.io.File;
import java.util.List;
import java.util.Map;
import rx.Observable;
import rx.android.schedulers.AndroidSchedulers;
import rx.functions.Func1;
import rx.schedulers.Schedulers;

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.support.design.widget.AppBarLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.app.SharedElementCallback;
import android.support.v4.view.ViewPager;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.animation.DecelerateInterpolator;
import android.widget.Toast;

/**
 * Created by hcc on 16/8/13 12:48
 * 100332338@qq.com
 * <p/>
 * 豆瓣妹子
 */
public class DoubanMeiziPageActivity extends RxBaseActivity {

  @Bind(R.id.view_pager)
  ViewPager mViewPager;

  @Bind(R.id.toolbar)
  Toolbar mToolbar;

  @Bind(R.id.app_bar_layout)
  AppBarLayout mAppBarLayout;

  private static final String EXTRA_INDEX = "extra_index";

  private static final String EXTRA_TYPE = "extra_type";

  private int currenIndex;

  private Realm realm;

  private int type;

  private boolean isHide = false;

  private String url;

  private RealmResults<DoubanMeizi> doubanMeizis;

  private MeiziPagerAdapter mPagerAdapter;


  @Override
  public int getLayoutId() {

    return R.layout.activity_meizi_pager;
  }


  @Override
  public void initViews(Bundle savedInstanceState) {

    Intent intent = getIntent();
    if (intent != null) {
      currenIndex = intent.getIntExtra(EXTRA_INDEX, -1);
      type = intent.getIntExtra(EXTRA_TYPE, -1);
    }
    realm = Realm.getDefaultInstance();
    doubanMeizis = realm.where(DoubanMeizi.class)
        .equalTo("type", type)
        .findAll();

    mPagerAdapter = new MeiziPagerAdapter(getSupportFragmentManager());
    mViewPager.setAdapter(mPagerAdapter);
    mViewPager.setPageTransformer(true, new DepthTransFormes());
    mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {

      @Override
      public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

      }


      @Override
      public void onPageSelected(int position) {
        mToolbar.setTitle(doubanMeizis.get(position).getTitle());
        currenIndex = position;
        url = doubanMeizis.get(currenIndex).getUrl();
      }


      @Override
      public void onPageScrollStateChanged(int state) {

      }
    });

    RxBus.getInstance().toObserverable(String.class)
        .subscribe(s -> {

          hideOrShowToolbar();
        }, throwable -> {

        });

    setEnterSharedElementCallback(new SharedElementCallback() {

      @Override
      public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {

        DoubanMeizi doubanMeizi = doubanMeizis.get(mViewPager.getCurrentItem());
        MeiziDetailsFragment fragment = (MeiziDetailsFragment)
            mPagerAdapter.instantiateItem(mViewPager, currenIndex);
        sharedElements.clear();
        sharedElements.put(doubanMeizi.getUrl(), fragment.getSharedElement());
      }
    });
  }


  @Override
  public void supportFinishAfterTransition() {

    Intent data = new Intent();
    data.putExtra("index", currenIndex);
    RxBus.getInstance().post(data);
    super.supportFinishAfterTransition();
  }


  @Override
  public void initToolBar() {

    mToolbar.setTitle(doubanMeizis.get(currenIndex).getTitle());
    mToolbar.setNavigationIcon(R.drawable.ic_back);
    mToolbar.setNavigationOnClickListener(v -> onBackPressed());
    mToolbar.inflateMenu(R.menu.menu_meizi);

    //设置toolbar的颜色
    mAppBarLayout.setAlpha(0.5f);
    mToolbar.setBackgroundResource(R.color.black_90);
    mAppBarLayout.setBackgroundResource(R.color.black_90);

    //menu的点击事件
    saveImage();
    shareImage();
  }


  @Override
  protected void onResume() {

    super.onResume();
    mViewPager.setCurrentItem(currenIndex);
    url = doubanMeizis.get(currenIndex).getUrl();
  }


  public static Intent luanch(Activity activity, int index, int type) {

    Intent mIntent = new Intent(activity, DoubanMeiziPageActivity.class);
    mIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    mIntent.putExtra(EXTRA_INDEX, index);
    mIntent.putExtra(EXTRA_TYPE, type);
    return mIntent;
  }


  /**
   * 保存图片到本地
   */
  private void saveImage() {

    RxMenuItem.clicks(mToolbar.getMenu().findItem(R.id.action_fuli_save))
        .compose(this.bindToLifecycle())
        .compose(RxPermissions.getInstance(DoubanMeiziPageActivity.this)
            .ensure(Manifest.permission.WRITE_EXTERNAL_STORAGE))
        .observeOn(Schedulers.io())
        .filter(aBoolean -> aBoolean)
        .flatMap(new Func1<Boolean, Observable<Uri>>() {

          @Override
          public Observable<Uri> call(Boolean aBoolean) {

            return GlideDownloadImageUtil.saveImageToLocal(DoubanMeiziPageActivity.this, url);
          }
        })
        .map(uri -> {

          String msg = String.format("图片已保存至 %s 文件夹",
              new File(Environment.getExternalStorageDirectory(), ConstantUtil.FILE_DIR)
                  .getAbsolutePath());
          return msg;
        })
        .observeOn(AndroidSchedulers.mainThread())
        .retry()
        .subscribe(s -> {

          Toast.makeText(DoubanMeiziPageActivity.this, s, Toast.LENGTH_SHORT).show();
        }, throwable -> {

          Toast.makeText(DoubanMeiziPageActivity.this, "保存失败,请重试", Toast.LENGTH_SHORT).show();
        });
  }


  /**
   * 分享图片
   */
  public void shareImage() {

    RxMenuItem.clicks(mToolbar.getMenu().findItem(R.id.action_fuli_share))
        .compose(this.bindToLifecycle())
        .compose(RxPermissions.getInstance(DoubanMeiziPageActivity.this)
            .ensure(Manifest.permission.WRITE_EXTERNAL_STORAGE))
        .observeOn(Schedulers.io())
        .filter(aBoolean -> aBoolean)
        .flatMap(new Func1<Boolean, Observable<Uri>>() {

          @Override
          public Observable<Uri> call(Boolean aBoolean) {

            return GlideDownloadImageUtil.
                saveImageToLocal(DoubanMeiziPageActivity.this, url);
          }
        })
        .observeOn(AndroidSchedulers.mainThread())
        .retry()
        .subscribe(uri -> {

          ShareUtil.sharePic(uri, doubanMeizis.get(currenIndex).getTitle(),
              DoubanMeiziPageActivity.this);
        }, throwable -> {

          Toast.makeText(DoubanMeiziPageActivity.this, "分享失败,请重试",
              Toast.LENGTH_SHORT).show();
        });
  }


  protected void hideOrShowToolbar() {

    if (isHide) {
      //显示
      ImmersiveUtil.exit(this);
      mAppBarLayout.animate()
          .translationY(0)
          .setInterpolator(new DecelerateInterpolator(2))
          .start();
      isHide = false;
    } else {
      //隐藏
      ImmersiveUtil.enter(this);
      mAppBarLayout.animate()
          .translationY(-mAppBarLayout.getHeight())
          .setInterpolator(new DecelerateInterpolator(2))
          .start();
      isHide = true;
    }
  }


  @Override
  public void onBackPressed() {

    supportFinishAfterTransition();
  }


  private class MeiziPagerAdapter extends FragmentStatePagerAdapter {

    public MeiziPagerAdapter(FragmentManager fm) {

      super(fm);
    }


    @Override
    public Fragment getItem(int position) {

      return MeiziDetailsFragment.
          newInstance(doubanMeizis.get(position).getUrl());
    }


    @Override
    public int getCount() {

      return doubanMeizis.size();
    }
  }
}