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在Android开发中#xff0c;通过对话框让用户选择#xff0c;筛选信息是很方便也很常见的操作。本文详细介绍了如何使用自定义 Dialog、RecyclerView 以及自定义搜索框 来实现选中状态和用户交互#xff0c;文中大本分代码都有明确注释#xff0c;主打一个简单明了通过对话框让用户选择筛选信息是很方便也很常见的操作。本文详细介绍了如何使用自定义 Dialog、RecyclerView 以及自定义搜索框 来实现选中状态和用户交互文中大本分代码都有明确注释主打一个简单明了实际效果如下可单选全选精准查找选择状态变化以及信息回调 一、Builder 模式
说到自定义 Dialog就不得不提到 Builder模式
Android系统中的Builder设计模式是一种创建型设计模式它主要用于构建一个复杂对象并将其构建过程与表示分离Builder设计模式通过将一个复杂对象的构建过程拆解成一系列简单的步骤使得构建过程更加灵活、可读和易于扩展。它允许用户在不知道内部构建细节的情况下可以更精细地控制对象的构造流程。
在Android开发中Builder模式的一个常见应用是AlertDialog.Builder。AlertDialog是一个复杂的对话框对象它包含多个属性和方法。使用AlertDialog.Builder可以方便地构建和显示对话框而无需直接操作AlertDialog对象。例如
AlertDialog.Builder builder new AlertDialog.Builder(context);
builder.setIcon(R.drawable.icon);
builder.setTitle(头部);
builder.setMessage(内容);
builder.setPositiveButton(Button1, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { // 处理点击事件 }
});
builder.create().show(); // 构建并显示对话框
综上所述Builder设计模式在Android开发中具有重要的应用价值。它可以帮助开发者构建复杂对象提高代码的可读性和可维护性同时支持灵活的构建过程和对象变种。 二、使用步骤
1. 自定义 SerachSelectDialog
public class SerachSelectDialog extends Dialog {private static SearchSelectAdapter sa;private static String result;private static ListString resultList new ArrayList();private static ListString selectedItems;private static int searchPosition;public SerachSelectDialog(Context context, int themeResId) {super(context, themeResId);}/*** 设置 Dialog的大小** param x 宽比例* param y 高比例*/public void setDialogWindowAttr(double x, double y, Activity activity) {if (x 0 || x 1 || y 0 || y 1) {return;}Window window this.getWindow();WindowManager.LayoutParams lp window.getAttributes();WindowManager manager activity.getWindowManager();DisplayMetrics outMetrics new DisplayMetrics();manager.getDefaultDisplay().getMetrics(outMetrics);int width outMetrics.widthPixels;int height outMetrics.heightPixels;lp.gravity Gravity.BOTTOM;lp.width (int) (width * x);lp.height (int) (height * y);this.getWindow().setAttributes(lp);}public static class Builder {private String title;private View contentView;private String positiveButtonText;private String negativeButtonText;private ListItemModel listData;private View.OnClickListener positiveButtonClickListener;private View.OnClickListener negativeButtonClickListener;private View.OnClickListener singleButtonClickListener;private View layout;private Context context;private SerachSelectDialog dialog;private OnSelectedListiner selectedListiner;SearchView searchView;LinearLayout closeBtn;LinearLayout okBtn;TextView titleView;private boolean state false;private RecyclerView itemLv;private final TextView qxTv;//初始化public Builder(Context context) {//这里传入自定义的style直接影响此Dialog的显示效果。style具体实现见style.xmlthis.context context;dialog new SerachSelectDialog(context, R.style.selectDialog);LayoutInflater inflater (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);layout inflater.inflate(R.layout.dialog_select_search, null);qxTv layout.findViewById(R.id.qx_tv);itemLv layout.findViewById(R.id.item_lv);searchView layout.findViewById(R.id.searchView);closeBtn layout.findViewById(R.id.diss_layout);okBtn layout.findViewById(R.id.ok_layout);titleView layout.findViewById(R.id.title_tv);dialog.addContentView(layout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));}public Builder setTitle(String title) {this.title title;return this;}public void setListData(ListItemModel listData) {this.listData listData;}/*** 单按钮对话框和双按钮对话框的公共部分在这里设置*/private SerachSelectDialog create() {GridLayoutManager gridLayoutManager new GridLayoutManager(context, 3);sa new SearchSelectAdapter(listData);itemLv.setLayoutManager(gridLayoutManager);itemLv.setAdapter(sa);//搜索事件searchView.setSearchViewListener(new SearchView.onSearchViewListener() {Overridepublic boolean onQueryTextChange(String text) {updateLayout(searchItem(text));return false;}});//全选qxTv.setOnClickListener(new View.OnClickListener() {Overridepublic void onClick(View v) {if (sa.getSelectedItemPositions().size() sa.getItemCount()) {sa.clearSelection();} else {sa.selectAll();resultList sa.getSelectedItems();}}});//取消按钮closeBtn.setOnClickListener(new View.OnClickListener() {Overridepublic void onClick(View v) {dialog.dismiss();resultList.clear();}});//确认按钮okBtn.setOnClickListener(new View.OnClickListener() {Overridepublic void onClick(View v) {String json new Gson().toJson(resultList);selectedListiner.onSelected(json);dialog.dismiss();resultList.clear();}});dialog.setOnDismissListener(new OnDismissListener() {Overridepublic void onDismiss(DialogInterface dialog) {}});//item点击事件sa.setOnItemClickListener(new SearchSelectAdapter.OnItemClickListener() {Overridepublic void onItemClick(int position) {boolean selected listData.get(position).isSelected();result listData.get(position).getItemName();if (selected true) {resultList.add(result);} else {resultList.remove(result);}Log.i(U--, resultList.toString() selected );}});dialog.setContentView(layout);//用户可以点击手机Back键取消对话框显示dialog.setCancelable(true);//用户不能通过点击对话框之外的地方取消对话框显示dialog.setCanceledOnTouchOutside(false);return dialog;}//在数据源中查找匹配的数据public ListItemModel searchItem(String name) {ArrayListItemModel mSearchList new ArrayListItemModel();for (int i 0; i listData.size(); i) {int index listData.get(i).getItemName().indexOf(name);// 存在匹配的数据if (index ! -1) {mSearchList.add(listData.get(i));Log.i(U--, i 搜索位置);searchPosition i;}}return mSearchList;}//提供匹配后的的数据进行数据回调public void updateLayout(ListItemModel newList) {final SearchSelectAdapter sa new SearchSelectAdapter(newList);GridLayoutManager gridLayoutManager new GridLayoutManager(context, 3);itemLv.setLayoutManager(gridLayoutManager);itemLv.setAdapter(sa);//item点击事件sa.setOnItemClickListener(new SearchSelectAdapter.OnItemClickListener() {Overridepublic void onItemClick(int position) {result newList.get(position).getItemName();boolean selected listData.get(searchPosition).isSelected();if (selected true) {resultList.add(result);} else {resultList.remove(result);}Log.i(U--, resultList.toString() selected );}});}//自定义接口进行数据点击回传public static abstract class OnSelectedListiner {public abstract void onSelected(String String);}public void setSelectedListiner(SerachSelectDialog.Builder.OnSelectedListiner selectedListiner) {this.selectedListiner selectedListiner;}//弹框展示public SerachSelectDialog show() {create();dialog.show();return dialog;}}
}2.自定义搜索框 SearchView
UI 主要包括输入框删除键 ,主要通过监听EditText 的文本以及输入框的变化设置搜索回调接口来实现
public class SearchView extends LinearLayout implements View.OnClickListener {/*** 输入框*/private EditText etInput;/*** 删除键*/private ImageView ivDelete;/*** 上下文对象*/private Context mContext;/*** 搜索回调接口*/private onSearchViewListener mListener;/*** 设置搜索回调接口** param listener 监听者*/public void setSearchViewListener(onSearchViewListener listener) {mListener listener;}public SearchView(Context context, AttributeSet attrs) {super(context, attrs);mContext context;LayoutInflater.from(context).inflate(R.layout.view_search_layout, this);initViews();}private void initViews() {etInput (EditText) findViewById(R.id.et_search_text);ivDelete (ImageView) findViewById(R.id.imb_search_clear);ivDelete.setOnClickListener(this);etInput.addTextChangedListener(new EditChangedListener());etInput.setOnClickListener(this);}private class EditChangedListener implements TextWatcher {Overridepublic void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {}Overridepublic void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {if (!.equals(charSequence.toString())) {ivDelete.setVisibility(VISIBLE);//更新autoComplete数据if (mListener ! null) {mListener.onQueryTextChange(charSequence );}} else {ivDelete.setVisibility(GONE);}}Overridepublic void afterTextChanged(Editable editable) {}}Overridepublic void onClick(View view) {switch (view.getId()) {case R.id.imb_search_clear:etInput.setText();if (mListener ! null) {mListener.onQueryTextChange();}ivDelete.setVisibility(GONE);break;}}/*** search view回调方法*/public interface onSearchViewListener {boolean onQueryTextChange(String text);}
}
3.SearchSelectAdapter
主要实现条目的点击事件以及数据回调
public class SearchSelectAdapter extends RecyclerView.AdapterSearchSelectAdapter.ViewHolder {private ListItemModel itemList;private ListInteger selectedItemPositions;//声明接口private OnItemClickListener onItemClickListener;public SearchSelectAdapter(ListItemModel itemList) {this.itemList itemList;selectedItemPositions new ArrayList();}Overridepublic int getItemCount() {return itemList.size();}public void setOnItemClickListener(OnItemClickListener listener) {this.onItemClickListener listener;}NonNullOverridepublic ViewHolder onCreateViewHolder(NonNull ViewGroup parent, int viewType) {// 创建ViewHolderView view LayoutInflater.from(parent.getContext()).inflate(R.layout.list_cell_select_single, parent, false);return new ViewHolder(view);}Overridepublic void onBindViewHolder(NonNull ViewHolder holder, int position) {// 绑定数据到ViewHolderItemModel item itemList.get(position);holder.textView.setText(item.getItemName());//给条目布局设置点击事件holder.itemLayout.setOnClickListener(new View.OnClickListener() {Overridepublic void onClick(View v) {if (selectedItemPositions.contains(position)) {selectedItemPositions.remove(Integer.valueOf(position));holder.textView.setTextColor(Color.BLACK);holder.itemView.setBackgroundResource(R.drawable.item_grey_layout_bg);item.setSelected(false);} else {selectedItemPositions.add(position);holder.textView.setTextColor(Color.WHITE);holder.itemView.setBackgroundResource(R.drawable.item_blue_layout_bg);item.setSelected(true);}if (onItemClickListener ! null) {onItemClickListener.onItemClick(position);}}});if (selectedItemPositions.contains(position)) {holder.textView.setTextColor(Color.WHITE);holder.itemView.setBackgroundResource(R.drawable.item_blue_layout_bg);} else {holder.textView.setTextColor(Color.BLACK);holder.itemView.setBackgroundResource(R.drawable.item_grey_layout_bg);}}/*** 接口回调*/public interface OnItemClickListener {void onItemClick(int position);}public void selectAll() {selectedItemPositions.clear();for (int i 0; i itemList.size(); i) {selectedItemPositions.add(i);}notifyDataSetChanged();}public void clearSelection() {selectedItemPositions.clear();notifyDataSetChanged();}public ListInteger getSelectedItemPositions() {return selectedItemPositions;}public ListString getSelectedItems() {ListString selectedItems new ArrayList();for (int position : selectedItemPositions) {selectedItems.add(itemList.get(position).getItemName());}return selectedItems;}public static class ViewHolder extends RecyclerView.ViewHolder {private final TextView textView;private final LinearLayout itemLayout;public ViewHolder(NonNull View itemView) {super(itemView);textView itemView.findViewById(R.id.tv_select_info);itemLayout itemView.findViewById(R.id.item_layout);}}
}
4.xml 布局
dialog_select_search.xml
?xml version1.0 encodingutf-8?
LinearLayout xmlns:androidhttp://schemas.android.com/apk/res/androidandroid:layout_widthmatch_parentandroid:layout_heightmatch_parentandroid:orientationverticalLinearLayoutandroid:layout_widthwrap_contentandroid:layout_heightwrap_contentandroid:backgrounddrawable/item_white_layoutandroid:orientationverticalRelativeLayoutandroid:layout_widthmatch_parentandroid:layout_height50dpTextViewandroid:idid/title_tvandroid:layout_widthwrap_contentandroid:layout_heightwrap_contentandroid:layout_centerInParenttrueandroid:text岗位选择android:textColorcolor/black //RelativeLayoutcom.example.dialoglistview.SearchViewandroid:idid/searchViewandroid:layout_widthmatch_parentandroid:layout_heightwrap_content /TextViewandroid:idid/qx_tvandroid:layout_widthmatch_parentandroid:layout_heightwrap_contentandroid:layout_marginLeft20dpandroid:layout_marginTopdimen/dp_10android:text全选android:textSize16sp /androidx.recyclerview.widget.RecyclerViewandroid:idid/item_lvandroid:layout_widthmatch_parentandroid:layout_heightwrap_content /Viewandroid:layout_widthmatch_parentandroid:layout_height1dpandroid:backgroundcolor/grey /LinearLayoutandroid:layout_widthmatch_parentandroid:layout_height40dpandroid:backgroundcolor/transparentandroid:gravitycenterandroid:orientationhorizontalLinearLayoutandroid:idid/diss_layoutandroid:layout_width0dpandroid:layout_heightmatch_parentandroid:layout_weight1android:gravitycenterTextViewandroid:layout_widthwrap_contentandroid:layout_heightwrap_contentandroid:text取消android:textColorcolor/sea_blue //LinearLayoutViewandroid:layout_width1dpandroid:layout_heightmatch_parentandroid:backgroundcolor/grey /LinearLayoutandroid:idid/ok_layoutandroid:layout_width0dpandroid:layout_heightmatch_parentandroid:layout_weight1android:gravitycenterTextViewandroid:layout_widthwrap_contentandroid:layout_heightwrap_contentandroid:text确定android:textColorcolor/sea_blue //LinearLayout/LinearLayout/LinearLayout/LinearLayout
view_search_layout.xml
?xml version1.0 encodingutf-8?
LinearLayout xmlns:androidhttp://schemas.android.com/apk/res/androidandroid:layout_widthmatch_parentandroid:layout_height50dpandroid:background#ffffffandroid:gravitycenterandroid:orientationverticalLinearLayoutandroid:layout_widthmatch_parentandroid:layout_height35dpandroid:layout_marginLeft15dpandroid:layout_marginRight15dpandroid:backgrounddrawable/item_search_layoutandroid:gravitycenter_verticalandroid:orientationhorizontalImageButtonandroid:idid/imb_search_searchandroid:layout_width20dpandroid:layout_height20dpandroid:layout_marginLeft15dpandroid:background#F0F0F0android:scaleTypecenterInsideandroid:srcmipmap/im_search_back /EditTextandroid:idid/et_search_textandroid:layout_widthwrap_contentandroid:layout_heightwrap_contentandroid:layout_marginLeft10dpandroid:layout_marginRight15dpandroid:layout_weight1android:backgroundnullandroid:hint请输入搜索内容android:lines1android:textSize14sp /ImageButtonandroid:idid/imb_search_clearandroid:layout_width35dpandroid:layout_height35dpandroid:layout_marginRight20dpandroid:background#F0F0F0android:padding12.5dpandroid:scaleTypecenterInsideandroid:srcmipmap/delet_zhaopian_1xandroid:visibilitygone //LinearLayout/LinearLayout
5.数据支持
// 创建数据列表
itemList new ArrayList();
itemList.add(new ItemModel(医生, false));
itemList.add(new ItemModel(警察, false));
itemList.add(new ItemModel(护士, false));
itemList.add(new ItemModel(农民, false));
itemList.add(new ItemModel(工人, false));
itemList.add(new ItemModel(司机, false)); public class ItemModel {private String itemName;private boolean isSelected;public ItemModel(String itemName, boolean isSelected) {this.itemName itemName;this.isSelected isSelected;}public String getItemName() {return itemName;}public void setItemName(String itemName) {this.itemName itemName;}public boolean isSelected() {return isSelected;}public void setSelected(boolean selected) {isSelected selected;}
}6.实际应用 private void openSearchSelectDialog() {SerachSelectDialog.Builder alert new SerachSelectDialog.Builder(this);alert.setListData(itemList);alert.setTitle(岗位选择);alert.setSelectedListiner(new SerachSelectDialog.Builder.OnSelectedListiner() {Overridepublic void onSelected(String info) {okTv.setText(info);}});SerachSelectDialog mDialog alert.show();//设置Dialog 尺寸mDialog.setDialogWindowAttr(0.9, 0.9, this);}
三、总结
后续 Demo 会上传
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