Android基於CountDownView的時間控件擴展

首先，新年的一年裡祝大家，心想事成，雞年大吉。去年的時候，我們做時間控件的時候一直遺留一個問題那就是正計時控件一直沒有好的解決方案，我們很想把CountDownView既支持正計時又能支持倒計時。基於這個想法，便有了今天這篇文章，原理不在介紹，其實很簡單，主要是我們知道怎麼用，此控件的優點有：

* 實現了正計時倒計時的統一
* 優化了Adapter,不再綁定控件Id
* 一個屬性實現正倒計時
* 不在為具體的時間屬性設置別名

具體用法

1、xml文件

屬性 app:isCountUp=”false”代表倒計時 true為正計時

<com.delta.library.CountTimeView
    android:id="@+id/cv_countView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_gravity="center_horizontal"
    android:layout_marginTop="20dp"
    app:isCountUp="false"
    app:isShowDay="true"
    app:isShowHour="true"
    app:isShowMillisecond="false"
    app:isShowMinute="true"
    app:isShowSecond="true"
    app:suffixDay="天"
    app:suffixDayRightMargin="10dp"
    app:suffixGravity="center"
    app:suffixHour=":"
    app:suffixMinute=":"
    app:suffixTextColor="#e61010"
    app:suffixTextSize="17sp"
    app:timeTextColor="#e60b0b"
    app:timeTextSize="20sp" />

2、實體類

要繼承TimeEntity
eg:

package com.delta.counttimeview;

/**
 * @description :正計時的
 * @autHor : V.Wenju.Tian
 * @date : 2017/2/6 15:31
 */


public class ItemEntity extends TimeEntity {

  private String title;

  private Long time;

  public ItemEntity() {
  }

  public ItemEntity(int id, long endTime, long createTime, String title, Long upTime) {
    super(id, endTime, createTime);
    this.title = title;
    this.time = upTime;
  }

  public Long getTime() {
    return time;
  }

  public void setTime(Long time) {
    this.time = time;
  }

  public void setTitle(String title) {
    this.title = title;
  }

  public String getTitle() {
    return title;
  }
}

3、Adapter如下

倒計時 主要是==要注意在數據源的時候初始化endTime屬性，也就是截止時間還有相應的EntityId==

public class CountDownActivity extends AppCompatActivity {


  private RecyclerView rv;
  private List<ItemEntity> datas = new ArrayList<>();
  private ItemCountViewAdapter<ItemEntity> mMyAdapter;

  @Override
  public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_count_down);
    rv = ((RecyclerView) findViewById(R.id.rv));
    long time =System.currentTimeMillis();
    for (int i = 0; i < 100; i++) {
      ItemEntity entity = new ItemEntity();
      entity.setEntityId(i);
      entity.setTitle("第" + i);
      entity.setTime(i *60 *1000l);
      entity.setEndTime(time + entity.getTime());
      datas.add(entity);
    }
    mMyAdapter = new ItemCountViewAdapter<ItemEntity>(this, datas) {
      @Override
      protected int getCountViewId() {
        return R.id.cv_countView;
      }

      @Override
      protected int getLayoutId() {
        return R.layout.item_count_down;
      }

      @Override
      protected void convert(ItemTimeViewHolder holder, ItemEntity itemEntity, int position) {

        holder.setText(R.id.tv_title, itemEntity.getTitle());
      }
    };
    rv.setLayoutManager(new LinearLayoutManager(this));
    rv.setAdapter(mMyAdapter);

  }

  @Override
  protected void onResume() {
    super.onResume();
    if (null != mMyAdapter) {
      mMyAdapter.startRefreshTime();
    }
  }

  @Override
  protected void onPause() {
    super.onPause();
    if (null != mMyAdapter) {
      mMyAdapter.cancelRefreshTime();
    }
  }

  @Override
  public void onDestroy() {
    super.onDestroy();
    if (null != mMyAdapter) {
      mMyAdapter.cancelRefreshTime();
    }
  }
}

正計時 ==主要是在獲得數據源的時候初始化createTime,也就是起始時間和EntityId==

public class CountUpActivity extends AppCompatActivity {


  private RecyclerView rv;
  private List<ItemEntity> datas = new ArrayList<>();
  private ItemCountViewAdapter<ItemEntity> mMyAdapter;

  @Override
  public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_count_up);
    rv = ((RecyclerView) findViewById(R.id.rv));

    for (int i = 0; i < 100; i++) {
      ItemEntity entity = new ItemEntity();
      entity.setEntityId(i);
      entity.setTitle("第" + i);
      entity.setTime(i * 60 * 60 * 1000l);
      entity.setCreateTime(System.currentTimeMillis() - entity.getTime());
      datas.add(entity);
    }
    mMyAdapter = new ItemCountViewAdapter<ItemEntity>(this, datas) {
      @Override
      protected int getCountViewId() {
        return R.id.cv_countView;
      }

      @Override
      protected int getLayoutId() {
        return R.layout.list_item;
      }

      @Override
      protected void convert(ItemTimeViewHolder holder, ItemEntity itemEntity, int position) {

        holder.setText(R.id.tv_title, itemEntity.getTitle());
      }
    };
    rv.setLayoutManager(new LinearLayoutManager(this));
    rv.setAdapter(mMyAdapter);

  }
  @Override
  protected void onResume() {
    super.onResume();
    if (null != mMyAdapter) {
      mMyAdapter.startRefreshTime();
    }
  }

  @Override
  protected void onPause() {
    super.onPause();
    if (null != mMyAdapter) {
      mMyAdapter.cancelRefreshTime();
    }
  }

  @Override
  public void onDestroy() {
    super.onDestroy();
    if (null != mMyAdapter) {
      mMyAdapter.cancelRefreshTime();
    }
  }
}

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