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Android recycleView的应用和点击事件实例详解

2019年07月24日  | 移动技术网移动技术  | 我要评论

android recycleview的应用和点击事件

效果图：


长按是删除：

下面代码：

mainactivity 类

public class mainactivity extends appcompatactivity {

  recyclerview rv;

  list<string> mlist = new arraylist<>();

  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);


    setcontentview(r.layout.activity_main);
    rv = (recyclerview) findviewbyid(r.id.rv);
    for (int i = 0; i < 1000; i++) {
      mlist.add("条目" + i);
    }
    final myadapter adapter = new myadapter(this, mlist);
    adapter.setonitemclicklistener(new myadapter.onitemclicklistener() {
      @override
      public void onclick(int position) {
        toast.maketext(getbasecontext(), "点击的是" + position + "的itemclick", toast.length_short).show();
      }
    });
    adapter.setonitemlongclicklistener(new myadapter.onitemlongclicklistener() {
      @override
      public void onlongclick(int position) {
        //长按删除数据
        mlist.remove(position);
        adapter.notifydatasetchanged();
      }
    });
    rv.setadapter(adapter);

    //布局管理器
    rv.setlayoutmanager(new staggeredgridlayoutmanager(5, staggeredgridlayoutmanager.vertical));
  }


  public static class vh extends recyclerview.viewholder {
    textview tv;

    public vh(view itemview) {
      super(itemview);
      tv = (textview) itemview.findviewbyid(android.r.id.text1);
      tv.setbackgroundresource(r.drawable.bg);
    }
  }


}

myadapter.java类

public class myadapter extends recyclerview.adapter<mainactivity.vh> {

  context mcontext;
  list<string> mlist;

  public myadapter(context context, list<string> list) {
    this.mcontext = context;
    this.mlist = list;
  }

  @override
  public mainactivity.vh oncreateviewholder(viewgroup parent, int viewtype) {
    return new mainactivity.vh(view.inflate(mcontext, android.r.layout.simple_list_item_1, null));
  }

  @override
  public void onbindviewholder(mainactivity.vh holder, final int position) {
    holder.tv.settext(mlist.get(position));

    //自己做item点击
    holder.itemview.setonclicklistener(new view.onclicklistener() {
      @override
      public void onclick(view v) {
        if (onitemclicklistener != null)
          onitemclicklistener.onclick(position);
      }
    });
    holder.itemview.setonlongclicklistener(new view.onlongclicklistener() {
      @override
      public boolean onlongclick(view v) {
        if (onitemlongclicklistener != null)
          onitemlongclicklistener.onlongclick(position);
        //返回false会在长安结束后继续点击
        return true;
      }
    });
  }

  @override
  public int getitemcount() {
    return mlist.size();
  }


  /**
   * 点击
   */
  public interface onitemclicklistener {
    void onclick(int position);
  }

  onitemclicklistener onitemclicklistener;


  public void setonitemclicklistener(onitemclicklistener onitemclicklistener) {
    this.onitemclicklistener = onitemclicklistener;
  }

  public interface onitemlongclicklistener {
    void onlongclick(int position);
  }

  onitemlongclicklistener onitemlongclicklistener;

  public void setonitemlongclicklistener(onitemlongclicklistener onitemlongclicklistener) {
    this.onitemlongclicklistener = onitemlongclicklistener;
  }
}

activity_main.xml类

<?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:id="@+id/activity_main"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context="com.example.administrator.lesson10_recyclerview2.mainactivity">


  <android.support.v7.widget.recyclerview
    android:id="@+id/rv"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

</relativelayout>

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