android仿支付宝密码输入框效果

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

来源：http://blog.csdn.net/coderinchina/article/details/52145793