本文实例为大家分享了android仿支付宝密码输入框展示的具体代码，供大家参考，具体内容如下

这个没什么好分析的,就是一些基本的绘制什么线,矩形什么的,看代码更具体

布局文件：

<?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" > <com.example.custompasswordview.PasswordView android:id="@+id/passwordview" android:layout_width="match_parent" android:layout_height="105px" android:layout_marginTop="100px" android:layout_marginLeft="20px" android:layout_marginRight="20px" android:inputType="number" android:cursorVisible="false" android:focusable="true" android:focusableInTouchMode="true" android:enabled="true" android:clickable="true" /> <Button android:id="@+id/btn_pass_reset" android:layout_width="250px" android:layout_height="90px" android:text="重置" android:layout_below="@id/passwordview" android:layout_marginTop="20px" android:layout_marginLeft="40px" android:gravity="center" /></RelativeLayout>

MainActivity.java

package com.example.custompasswordview;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.Button;public class MainActivity extends Activity { private Button btn_pass_reset; private PasswordView passwordview; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn_pass_reset = (Button) findViewById(R.id.btn_pass_reset); passwordview = (PasswordView) findViewById(R.id.passwordview); btn_pass_reset.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { passwordview.setEmpeyText(); } }); }}

自定义EditText输入框

package com.example.custompasswordview;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.util.Log;import android.widget.EditText;import android.widget.Toast;/** * Created by Adminis on 2016/8/7. */public class PasswordView extends EditText { private static final String TAG ="PasswordView" ; private Paint bordPaint;//外框画笔 private Paint linePaint;//线 的画笔 private Paint passTextPaint;//密码画笔 private int width; private int height; private int passwordLength = 6;//代码的长度 private int textLength; private int radius = 15; public PasswordView(Context context) { this(context,null); } public PasswordView(Context context, AttributeSet attrs) { this(context, attrs,0); } public PasswordView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initPaint(); } /** * 初始化画笔 */ private void initPaint() { setFocusable(true); bordPaint = new Paint(); bordPaint.setStrokeWidth(8); bordPaint.setColor(Color.WHITE); bordPaint.setStyle(Paint.Style.FILL); linePaint = new Paint(); linePaint.setColor(Color.parseColor("#838B8B")); linePaint.setStrokeWidth(4); passTextPaint = new Paint(); passTextPaint.setColor(Color.parseColor("#000000")); passTextPaint.setStrokeWidth(12); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); height = getMeasuredHeight(); width = getMeasuredWidth(); drawRoundRect(canvas); drawLine(canvas); drawTextPass(canvas); } /** * 绘制密码 * @param canvas */ private void drawTextPass(Canvas canvas) { float cx, cy = height/ 2; float half = width / passwordLength / 2; for(int i = 0; i < textLength; i++) { cx = width * i / passwordLength + half; canvas.drawCircle(cx, cy, radius, passTextPaint); } } /** * 绘制线 * @param canvas */ private void drawLine(Canvas canvas) { for (int i = 1; i < passwordLength; i++) { float x = width * i / passwordLength; canvas.drawLine(x, 12, x, height-12, linePaint); } } /** * 绘制背景 * @param canvas */ private void drawRoundRect(Canvas canvas) { canvas.drawRoundRect(0,0,width,height,12,12,bordPaint); } @Override protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) { super.onTextChanged(text, start, lengthBefore, lengthAfter); this.textLength = text.toString().length(); if(textLength==6){ Toast.makeText(getContext(),"您设置的密码为"+text,Toast.LENGTH_SHORT).show(); } invalidate(); } public void setEmpeyText(){ setText(""); invalidate(); }}

效果：

github:https://github.com/zhouguizhi/ZhiFuBaoPwdView

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。