android 仿支付宝密码输入框

android 仿支付宝密码输入框

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=""
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    &le.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>

ample.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) {Create(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();
            }});
    }
}

ample.custompasswordview;
t.Context;
aphics.Canvas;
aphics.Color;
aphics.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) {Draw(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) {TextChanged(text, start, lengthBefore, lengthAfter);
        Length = String().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();
    }
}

github: