Android自定义下拉框

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Android自定义下拉框

Android 原生的Spinner下拉框无法满足项目的需要，所以自已用PopupWindow写了一自定下拉框，效果如下：

java代码:CommonSpinner

package guojunustb.commonspinner;import android.content.Context;import android.graphics.drawable.ColorDrawable;import android.util.AttributeSet;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.ListView;import android.widget.PopupWindow;import android.widget.TextView;import java.util.List;/** * Created by guojun on 2015/10/29. */public class CommonSpinner extends TextView implements View.OnClickListener {    private TextView mTvTopView;    private Context mContext;    private SpinnerPopupWindow mPopupWindow;    private List<String> mDatas;    private OnSpinnerItemSelectListener mOnSpinnerItemSelectListener;    public CommonSpinner(Context context) {        this(context, null);    }    public CommonSpinner(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public CommonSpinner(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        mTvTopView = this;        mContext = context;        mPopupWindow = new SpinnerPopupWindow(mContext);        setOnClickListener(this);    }    @Override    public void onClick(View v) {        mPopupWindow.showPopupWindow(mTvTopView);    }    public void setData(List<String> datas) {        this.mDatas = datas;    }    class SpinnerPopupWindow extends PopupWindow {        private Context mContext;        private ListView mListView;        private MyAdapter mMyAdapter;        public SpinnerPopupWindow(Context context) {            init(context);        }        private void init(Context context) {            mContext = context;            LayoutInflater inflater = (LayoutInflater) context                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);            View view = inflater.inflate(R.layout.layout_spinner, null);            mListView = (ListView) view.findViewById(R.id.listview);            mListView.setItemsCanFocus(true);            mMyAdapter = new MyAdapter();            mListView.setAdapter(mMyAdapter);            this.setContentView(view);            //设置宽高            this.setWidth(mListView.getLayoutParams().width);            this.setHeight(mListView.getLayoutParams().height);            //让popupwindow获取焦点            this.setFocusable(true);            this.setOutsideTouchable(true);            this.update();            // 如果不设置PopupWindow的背景，无论是点击外部区域还是Back键都无法dismiss弹框            ColorDrawable dw = new ColorDrawable(00000000);            this.setBackgroundDrawable(dw);            //设置动画            this.setAnimationStyle(R.style.SpinnerPopupWindowAnim);        }        class MyAdapter extends BaseAdapter {            @Override            public int getCount() {                return mDatas == null ? 0 : mDatas.size();            }            @Override            public Object getItem(int position) {                return null;            }            @Override            public long getItemId(int position) {                return position;            }            @Override            public View getView(final int position, View convertView, ViewGroup parent) {                if (convertView == null) {                    convertView = View.inflate(mContext, R.layout.item_spinner, null);                }                Button bt = ViewHolder.get(convertView,R.id.bt_item);                bt.setText(mDatas.get(position));                bt.setOnClickListener(new View.OnClickListener() {                    @Override                    public void onClick(View v) {                        showPopupWindow(mTvTopView);                        mTvTopView.setText(mDatas.get(position));                        if (null != mOnSpinnerItemSelectListener) {                            mOnSpinnerItemSelectListener.onItemSelectListener(position);                        }                    }                });                return convertView;            }        }        public void showPopupWindow(View parent) {            if (!this.isShowing()) {                this.showAsDropDown(parent, -(this.getWidth() -parent.getWidth())/2, 0);            } else {                this.dismiss();            }        }    }    public void setOnSpinnerItemSelectListener(OnSpinnerItemSelectListener listener) {        this.mOnSpinnerItemSelectListener = listener;    }    public interface OnSpinnerItemSelectListener {        void onItemSelectListener(int pos);    }}

布局文件：layout_spinner.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="111dp"    android:layout_height="wrap_content"    android:orientation="vertical">    <ListView        android:id="@+id/listview"        android:layout_width="111dp"        android:layout_height="190dp"        android:paddingTop="10dp"        android:descendantFocusability="blocksDescendants"        android:background="@mipmap/class_tab_putup"        android:divider="@null"        android:scrollbars="none" /></LinearLayout>

Activity文件

package guojunustb.commonspinner;import android.app.Activity;import android.os.Bundle;import android.widget.Toast;import java.util.ArrayList;import java.util.List;public class MainActivity extends Activity {    private CommonSpinner mCommonSpinner;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        assignViews();    }    private void assignViews() {        mCommonSpinner = (CommonSpinner) findViewById(R.id.common_spinner);        mCommonSpinner.setData(getDatas());        mCommonSpinner.setOnSpinnerItemSelectListener(new CommonSpinner.OnSpinnerItemSelectListener() {            @Override            public void onItemSelectListener(int pos) {                Toast.makeText(MainActivity.this, "pos="+pos, Toast.LENGTH_SHORT).show();            }        });    }    private List<String> getDatas() {        ArrayList<String> list=new ArrayList<>();        for (int i=1;i<15;i++){            list.add("第"+i+"周");        }        return list;    }}

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