PopupWindow简单使用

在Android开发中PopupWindow是经常被使用到的，下面我们来实现以下PopupWindow，当然了，在开发中也可以封装，这样可以多次用到，小伙伴们加油。

1、效果如下：

2、代码如下：

public class InfoActivity extends AppCompatActivity{
      private PopupWindow popWindow;
      private CommonAdapter<String> authAdapter;
      @Override
      protected void onCreate(@Nullable Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_info);
      }
      @OnClick({ R.id.ll_user_auth, R.id.ll_user_flag})
      public void onViewClicked(View view) {
          case R.id.ll_user_auth:
            showAuthPopWin(view);
            break;
        case R.id.ll_user_flag:
            //showPopuWindowAlter(1, view);
            break;
      }
    private void showAuthPopWin(View v) {

      try {
        View view = LayoutInflater.from(this).inflate(R.layout.ly_type, null, false);
        RecyclerView recyclerPool = (RecyclerView) view.findViewById(R.id.recyclerType);
        LinearLayout hot_layout = (LinearLayout) view.findViewById(R.id.type_layout);
        recyclerPool.setLayoutManager(new LinearLayoutManager(this));

        List<String> stringList = new ArrayList<>();
        stringList.add("admin");
        stringList.add("user");
        stringList.add("manager");
        authAdapter = new CommonAdapter<String>(this, R.layout.item_rv_popu_layout,         stringList) {
            @Override
            protected void convert(ViewHolder holder, String string, int position) {

                holder.setText(R.id.tv_name, string);
            }
        };
        recyclerPool.setAdapter(authAdapter);
        if (authAdapter.getItemCount() > 5) {
            hot_layout.setLayoutParams(new  LinearLayout.LayoutParams(ConvertUtils.dip2px(this, 150), ConvertUtils.dip2px(getContext(), 100)));
        }
        UIUtils.post(() -> authAdapter.notifyDataSetChanged());

        popWindow = new PopupWindow(view, ConvertUtils.dip2px(this, 202), ViewGroup.LayoutParams.WRAP_CONTENT, true);
        popWindow.setAnimationStyle(R.anim.anim_pop);
        popWindow.setTouchable(true);
        popWindow.setTouchInterceptor((v2, event) -> {
            return false;
        });
        popWindow.setBackgroundDrawable(new ColorDrawable(0x00000000));
        popWindow.showAsDropDown(v, 0, 0);
        onSelectItemPopup(popWindow);
    } catch (Exception ex) {
        XLog.e("initPossiblePopWin:Exception Occurs " + ex.getMessage());
    }
}
} 
private void onSelectItemPopup(PopupWindow popWindow) {

    authAdapter.setOnItemClickListener(new MultiItemTypeAdapter.OnItemClickListener() {
        @Override
        public void onItemClick(View view, RecyclerView.ViewHolder holder, int position) {
            if (authAdapter.getDatas() == null) {
                if (popWindow != null) popWindow.dismiss();
                return;
            }
            tvUserAuth.setText(authAdapter.getDatas().get(position));
            if (popWindow != null) popWindow.dismiss();
        }

        @Override
        public boolean onItemLongClick(View view, RecyclerView.ViewHolder holder, int position){
            return false;
        }
    });
}

R.layout.ly_type 布局文件

  <?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:orientation="vertical">

  <LinearLayout
    android:id="@+id/type_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/poppup_style"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <android.support.v7.widget.RecyclerView
            android:id="@+id/recyclerType"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
    </LinearLayout>
</LinearLayout>
</LinearLayout>

drawable/poppup_style文件

  <?xml version="1.0" encoding="UTF-8"?>
  <shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#fff" />
    <stroke
      android:width="1dp"
      android:color="#BDC7D8" />
    <corners
      android:bottomLeftRadius="2dp"
      android:bottomRightRadius="2dp"
      android:topLeftRadius="2dp"
      android:topRightRadius="2dp" />
</shape>






      ![Screenshot_20171121-102834.png](http://upload-images.jianshu.io/upload_images/3012005-532c28352f7d291a.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)