Android 高仿微信支付数字键盘功能

微信公众号 2022-02-28
现在很多app的支付、输入密码功能，都是使用自定义数字键盘，方便实用。下面本文给大家带来了Android 高仿微信支付数字键盘功能，非常不错，感兴趣的朋友一起学习吧

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：

Android 高仿微信支付数字键盘功能

1. 自定义布局

<?xml version=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>
<!-- 输入键盘 -->
<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：

<?xml version=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：

<?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: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());
}
}
}
}
};}
androidandroid微信支付键盘

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