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：

android:layout_width="match_parent"

android:layout_height="match_parent"

>

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"

/>

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"

/>

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：

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脚本之家。