现在很多app的支付、输入密码功能，都已经开始使用自定义数字键盘，不仅更加方便、其效果着实精致。
下面带着大家学习下，如何高仿微信的数字键盘，可以拿来直接用在自身的项目中。
先看下效果图：
1. 自定义布局
<"1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content"> <> <GridView android:id="@+id/gv_keybord" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:background="#bdbdbd" android:horizontalSpacing="1px" android:numColumns="3" android:verticalSpacing="1px" /> <View android:id="@+id/line" android:layout_width="match_parent" android:layout_height="1px" android:layout_above="@id/gv_keybord" android:background="#bdbdbd" /> <RelativeLayout android:id="@+id/layoutBack" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_above="@id/line" android:background="#f5f5f5" android:padding="10dp"> <ImageView android:id="@+id/imgBack" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:src="@mipmap/keyboard_back_img" /> </RelativeLayout> <View android:layout_width="match_parent" android:layout_height="1px" android:layout_above="@id/layoutBack" android:layout_marginTop="1dp" android:background="#bdbdbd" /> </RelativeLayout>
键盘的布局，实质就是一个4X3网格布局的GridView。
2.实现数字键盘内容
import android.content.Context; import android.util.AttributeSet; import android.view.View; import android.widget.GridView; import android.widget.RelativeLayout; import com.lnyp.pswkeyboard.R; import com.lnyp.pswkeyboard.adapter.KeyBoardAdapter; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; /** * 虚拟键盘 */ public class VirtualKeyboardView extends RelativeLayout implements View.OnClickListener { Context context; private GridView gridView; private RelativeLayout layoutBack; private ArrayList<Map<String, String>> valueList; public VirtualKeyboardView(Context context) { this(context, null); } public VirtualKeyboardView(Context context, AttributeSet attrs) { super(context, attrs); this.context = context; View view = View.inflate(context, R.layout.layout_virtual_keyboard, null); valueList = new ArrayList<>(); layoutBack = (RelativeLayout) view.findViewById(R.id.layoutBack); layoutBack.setOnClickListener(this); gridView = (GridView) view.findViewById(R.id.gv_keybord); setView(); addView(view); } public RelativeLayout getLayoutBack() { return layoutBack; } public ArrayList<Map<String, String>> getValueList() { return valueList; } public GridView getGridView() { return gridView; } private void setView() { /* 初始化按钮上应该显示的数字 */ for (int i = 1; i < 13; i++) { Map<String, String> map = new HashMap<String, String>(); if (i < 10) { map.put("name", String.valueOf(i)); } else if (i == 10) { map.put("name", "."); } else if (i == 11) { map.put("name", String.valueOf(0)); } else if (i == 12) { map.put("name", ""); } valueList.add(map); } KeyBoardAdapter keyBoardAdapter = new KeyBoardAdapter(context, valueList); gridView.setAdapter(keyBoardAdapter); } @Override public void onClick(View v) { } }
看下适配器如何处理：KeyBoardAdapter .java
import android.content.Context; import android.graphics.Color; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.RelativeLayout; import android.widget.TextView; import com.lnyp.pswkeyboard.R; import java.util.ArrayList; import java.util.Map; /** * 九宫格键盘适配器 */ public class KeyBoardAdapter extends BaseAdapter { private Context mContext; private ArrayList<Map<String, String>> valueList; public KeyBoardAdapter(Context mContext, ArrayList<Map<String, String>> valueList) { this.mContext = mContext; this.valueList = valueList; } @Override public int getCount() { return valueList.size(); } @Override public Object getItem(int position) { return valueList.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder viewHolder; if (convertView == null) { convertView = View.inflate(mContext, R.layout.grid_item_virtual_keyboard, null); viewHolder = new ViewHolder(); viewHolder.btnKey = (TextView) convertView.findViewById(R.id.btn_keys); viewHolder.imgDelete = (RelativeLayout) convertView.findViewById(R.id.imgDelete); convertView.setTag(viewHolder); } else { viewHolder = (ViewHolder) convertView.getTag(); } if (position == 9) { viewHolder.imgDelete.setVisibility(View.INVISIBLE); viewHolder.btnKey.setVisibility(View.VISIBLE); viewHolder.btnKey.setText(valueList.get(position).get("name")); viewHolder.btnKey.setBackgroundColor(Color.parseColor("#e0e0e0")); } else if (position == 11) { viewHolder.btnKey.setBackgroundResource(R.mipmap.keyboard_delete_img); viewHolder.imgDelete.setVisibility(View.VISIBLE); viewHolder.btnKey.setVisibility(View.INVISIBLE); } else { viewHolder.imgDelete.setVisibility(View.INVISIBLE); viewHolder.btnKey.setVisibility(View.VISIBLE); viewHolder.btnKey.setText(valueList.get(position).get("name")); } return convertView; } /** * 存放控件 */ public final class ViewHolder { public TextView btnKey; public RelativeLayout imgDelete; } }
在看Adapter之前，我们先看下grid_item_virtual_keyboard是如何实现的：
<"1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#e0e0e0"> <TextView android:id="@+id/btn_keys" android:layout_width="match_parent" android:layout_height="60dp" android:layout_centerInParent="true" android:background="@drawable/selector_gird_item" android:gravity="center" android:includeFontPadding="false" android:textColor="#333333" android:textSize="26sp" /> <RelativeLayout android:id="@+id/imgDelete" android:layout_width="wrap_content" android:layout_height="60dp" android:layout_centerInParent="true"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:src="@mipmap/keyboard_delete_img" /> </RelativeLayout> </RelativeLayout>
可以看到，我们在item布局文件中，指定了两个view，一个是普通显示数字的TextView， 一个是显示最后删除键的RelativeLayout。
然后，在KeyBoardAdapter 的getView方法中，我们根据position位置，对布局进行不同的处理。当position为9，也就是倒数第三个按键，它的按钮颜色要单独设置。 当position为12也就是最后一个按钮时，需要控制删除按钮显示，数字按钮隐藏。 其余情况则是删除按钮隐藏，数字按钮显示。
3.使用并实现键盘事件逻辑
布局中，可以直接使用自己定义的数字键盘：
<"1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#efefef" tools:context="com.lnyp.pswkeyboard.NormalKeyBoardActivity"> <EditText android:id="@+id/textAmount" android:layout_width="match_parent" android:layout_height="50dp" android:background="#FFFFFF" android:inputType="numberDecimal" android:padding="14dp" android:textColor="#333333" android:textSize="16sp" /> <com.lnyp.pswkeyboard.widget.VirtualKeyboardView android:id="@+id/virtualKeyboardView" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="bottom" /> </RelativeLayout>
我们在Activity中，操作数字键盘：
import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.text.Editable; import android.view.View; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.widget.AdapterView; import android.widget.EditText; import android.widget.GridView; import com.lnyp.pswkeyboard.widget.VirtualKeyboardView; import java.util.ArrayList; import java.util.Map; public class NormalKeyBoardActivity extends AppCompatActivity { private VirtualKeyboardView virtualKeyboardView; private GridView gridView; private ArrayList<Map<String, String>> valueList; private EditText textAmount; private Animation enterAnim; private Animation exitAnim; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_normal_key_board); valueList = virtualKeyboardView.getValueList(); initAnim(); initView(); } private void initAnim() { enterAnim = AnimationUtils.loadAnimation(this, R.anim.push_bottom_in); exitAnim = AnimationUtils.loadAnimation(this, R.anim.push_bottom_out); } private void initView() { virtualKeyboardView = (VirtualKeyboardView) findViewById(R.id.virtualKeyboardView); textAmount = (EditText) findViewById(R.id.textAmount); virtualKeyboardView.getLayoutBack().setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { virtualKeyboardView.startAnimation(exitAnim); virtualKeyboardView.setVisibility(View.GONE); } }); gridView = virtualKeyboardView.getGridView(); gridView.setOnItemClickListener(onItemClickListener); textAmount.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { virtualKeyboardView.setFocusable(true); virtualKeyboardView.setFocusableInTouchMode(true); virtualKeyboardView.startAnimation(enterAnim); virtualKeyboardView.setVisibility(View.VISIBLE); } }); } private AdapterView.OnItemClickListener onItemClickListener = new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) { if (position < 11 && position != 9) { //点击0~9按钮 String amount = textAmount.getText().toString().trim(); amount = amount + valueList.get(position).get("name"); textAmount.setText(amount); Editable ea = textAmount.getText(); textAmount.setSelection(ea.length()); } else { if (position == 9) { //点击退格键 String amount = textAmount.getText().toString().trim(); if (!amount.contains(".")) { amount = amount + valueList.get(position).get("name"); textAmount.setText(amount); Editable ea = textAmount.getText(); textAmount.setSelection(ea.length()); } } if (position == 11) { //点击退格键 String amount = textAmount.getText().toString().trim(); if (amount.length() > 0) { amount = amount.substring(0, amount.length() - 1); textAmount.setText(amount); Editable ea = textAmount.getText(); textAmount.setSelection(ea.length()); } } } } };}
源码地址：https://github.com/zuiwuyuan/WeChatPswKeyboard
上所述是小编给大家介绍的Android 高仿微信支付数字键盘功能，希望对大家有所帮助，如果大家有任何疑问请给我们留言，小编会及时回复大家的。在此也非常感谢大家对查字典教程网的支持！
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