Android中怎么实现微信支付数字键盘功能
本篇文章为大家展示了Android中怎么实现微信支付数字键盘功能,内容简明扼要并且容易理解,绝对能使你眼前一亮,通过这篇文章的详细介绍希望你能有所收获。
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1. 自定义布局
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
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> valueList; public KeyBoardAdapter(Context mContext, ArrayList > 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:
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:
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> 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()); } } } } };}
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