步骤：

1.定义自定义的Dialog的布局文件

2.写一个类MyDialog继承Dialog

3.Dialog 返回值到Activity的方法是定义一个接口，接口中定义返回值到Activity的方法，MyDialog实现这个接口，然后在需要的位置调用接口中的方法，Activity实现这个接口，

重写接口的方法

代码如下

return_code_dialog.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:orientation="vertical"

    android:padding="10dp"

    android:background="@color/white"

    android:weightSum="1">

    <TextView

        android:id="@+id/title"

        android:layout_width="321dp"

        android:layout_height="wrap_content"

        android:textColor="@color/black"

        android:textSize="24dp"/>

    <View

        android:layout_width="match_parent"

        android:layout_height="1px"

        android:background="@color/black"

        />

    <TextView

        android:id="@+id/content"

        android:layout_marginTop="10dp"

        android:layout_width="305dp"

        android:layout_gravity="center"

        android:textColor="@color/viewfinder_mask"

        android:layout_height="wrap_content"

        android:textSize="18dp"/>

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_marginTop="10dp"

        android:layout_height="wrap_content"

        android:orientation="horizontal">

   <EditText

       android:layout_width="0dp"

       android:layout_weight="1"

       android:gravity="center"

       android:textSize="20dp"

       android:password="true"

       android:layout_height="50dp"

       android:background="@drawable/bg_edit_normal"

       android:id="@+id/psw_1"

       android:digits="1234567890"/>

    <EditText

        android:layout_width="0dp"

        android:layout_weight="1"

        android:layout_height="50dp"

        android:background="@drawable/bg_edit_normal"

        android:id="@+id/psw_2"

        android:password="true"

        android:gravity="center"

        android:textSize="20dp"

        android:digits="1234567890"

        />

    <EditText

        android:layout_width="0dp"

        android:layout_weight="1"

        android:layout_height="50dp"

        android:background="@drawable/bg_edit_normal"

        android:id="@+id/psw_3"

        android:password="true"

        android:gravity="center"

        android:textSize="20dp"

        android:digits="1234567890"

        />

    <EditText

        android:layout_width="0dp"

        android:layout_weight="1"

        android:layout_height="50dp"

        android:background="@drawable/bg_edit_normal"

        android:id="@+id/psw_4"

        android:password="true"

        android:gravity="center"

        android:textSize="20dp"

        android:digits="1234567890"

        />

    <EditText

        android:layout_width="0dp"

        android:layout_weight="1"

        android:layout_height="50dp"

        android:background="@drawable/bg_edit_normal"

        android:id="@+id/psw_5"

        android:password="true"

        android:gravity="center"

        android:textSize="20dp"

        android:digits="1234567890"

        />

    <EditText

        android:layout_width="0dp"

        android:layout_weight="1"

        android:layout_height="50dp"

        android:background="@drawable/bg_edit_normal"

        android:id="@+id/psw_6"

        android:password="true"

        android:gravity="center"

        android:textSize="20dp"

        android:digits="1234567890"

        />

    </LinearLayout>

</LinearLayout>
interface MyJudgePasswordInterface
public interface MyJudgePasswordInterface {

    public void returnJudgePasswordResult(boolean result);

}


PasswordDialog.java




package com.example.administrator.bigelephantbike;

import android.app.AlertDialog;

import android.app.Dialog;

import android.content.Context;

import android.content.Intent;

import android.os.Bundle;

import android.text.Editable;

import android.text.TextWatcher;

import android.util.Log;

import android.view.KeyEvent;

import android.view.LayoutInflater;

import android.view.View;

import android.view.inputmethod.EditorInfo;

import android.widget.EditText;

import android.widget.TextView;

import org.w3c.dom.Text;

/**

 * Created by Administrator on 2016/4/3.

 */

public class PasswordDialog extends Dialog implements TextWatcher,View.OnKeyListener{

    private Context context;

    private String title;

    private String content;

    private TextView titleTextView;

    private TextView contentTextVIew;

    private EditText eidtText1;

    private EditText eidtText2;

    private EditText eidtText3;

    private EditText eidtText4;

    private EditText eidtText5;

    private EditText eidtText6;

    private String password;

    private int current=0;

    private String[]passwordInput =new String[6];

    private int maxLen =1;//限制EditText的输入长度

    private MyJudgePasswordInterface myJudgePasswordInterface;

    public PasswordDialog(Context context) {

        super(context);

    }

    public PasswordDialog(Context context, int themeResId) {

        super(context, themeResId);

    }

    public PasswordDialog(Context context,String title,String content,String password,MyJudgePasswordInterface myJudgePasswordInterface){

        super(context,R.style.add_dialog);

        this.context =context;

        this.title=title;

        this.content =content;

        this.password =password;

        this.myJudgePasswordInterface =myJudgePasswordInterface;

    }

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        init();

    }

    void init(){

        LayoutInflater inflater = LayoutInflater.from(context);

        View view = inflater.inflate(R.layout.return_code_dialog, null);

        setContentView(view);

        titleTextView =(TextView)findViewById(R.id.title);

        contentTextVIew=(TextView)findViewById(R.id.content);

        eidtText1 =(EditText)findViewById(R.id.psw_1);

        eidtText2 =(EditText)findViewById(R.id.psw_2);

        eidtText3 =(EditText)findViewById(R.id.psw_3);

        eidtText4 =(EditText)findViewById(R.id.psw_4);

        eidtText5 =(EditText)findViewById(R.id.psw_5);

        eidtText6 =(EditText)findViewById(R.id.psw_6);

        titleTextView.setText(title);

        contentTextVIew.setText(content);

        //锁定数字键盘

        eidtText1.setInputType(EditorInfo.TYPE_CLASS_NUMBER);

        eidtText2.setInputType(EditorInfo.TYPE_CLASS_NUMBER);

        eidtText3.setInputType(EditorInfo.TYPE_CLASS_NUMBER);

        eidtText4.setInputType(EditorInfo.TYPE_CLASS_NUMBER);

        eidtText5.setInputType(EditorInfo.TYPE_CLASS_NUMBER);

        eidtText6.setInputType(EditorInfo.TYPE_CLASS_NUMBER);

        //添加内容改变的事件监听

        eidtText1.addTextChangedListener(this);

        eidtText2.addTextChangedListener(this);

        eidtText3.addTextChangedListener(this);

        eidtText4.addTextChangedListener(this);

        eidtText5.addTextChangedListener(this);

        eidtText6.addTextChangedListener(this);

        eidtText1.setOnKeyListener(this);

        eidtText2.setOnKeyListener(this);

        eidtText3.setOnKeyListener(this);

        eidtText4.setOnKeyListener(this);

        eidtText4.setOnKeyListener(this);

        eidtText5.setOnKeyListener(this);

        eidtText6.setOnKeyListener(this);

    }

    @Override

    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override

    public void onTextChanged(CharSequence s, int start, int before, int count) {

        int length = 0;

        //Log.d("test","current="+current+"我变了");

        switch (current) {

            case 0:

                length = eidtText1.getText().length();

                changeFocus(length, eidtText2);

                passwordInput[0] = eidtText1.getText().toString();

                break;

            case 1:

                length = eidtText2.getText().length();

                changeFocus(length, eidtText3);

                passwordInput[1] = eidtText2.getText().toString();

                break;

            case 2:

                length = eidtText3.getText().length();

                changeFocus(length, eidtText4);

                passwordInput[2] = eidtText3.getText().toString();

                break;

            case 3:

                length = eidtText4.getText().length();

                changeFocus(length, eidtText5);

                passwordInput[3] = eidtText4.getText().toString();

                break;

            case 4:

                length = eidtText5.getText().length();

                changeFocus(length, eidtText6);

                passwordInput[4] = eidtText5.getText().toString();

                break;

            case 5:

                length = eidtText6.getText().length();

                if (length >= 1) {

                    passwordInput[5] = eidtText6.getText().toString();

                    myJudgePasswordInterface.returnJudgePasswordResult(validatePassword());

                    this.cancel();

                }

        }

    }

    @Override

    public void afterTextChanged(Editable s) {

    }

    void changeFocus(int l,EditText editText){

        if(l >= maxLen){

            current++;

            editText.setFocusable(true);

            editText.setFocusableInTouchMode(true);

            editText.requestFocus();

            editText.findFocus();

        }

    }

    boolean validatePassword(){

        current=0;

        StringBuffer stringBuffer=new StringBuffer();

        for(int i=0;i<passwordInput.length;i++){

            stringBuffer.append(passwordInput[i]);

        }

        String psw =stringBuffer.toString();

        return psw.equals(password);

    }

    @Override

    public boolean onKey(View v, int keyCode, KeyEvent event) {

        if (keyCode == KeyEvent.KEYCODE_DEL

                && event.getAction() == KeyEvent.ACTION_DOWN) {

            current--;

            switch(current){

                case 0:eidtText1.setText("");requestF(eidtText1);break;

                case 1:eidtText2.setText("");requestF(eidtText2);break;

                case 2:eidtText3.setText("");requestF(eidtText3);break;

                case 3:eidtText4.setText("");requestF(eidtText4);break;

                case 4:eidtText5.setText("");requestF(eidtText5);break;

                case 5:eidtText6.setText("");requestF(eidtText6);break;

            }

        }

        return false;

    }

    void requestF(EditText editText){

        editText.setFocusable(true);

        editText.setFocusableInTouchMode(true);

        editText.requestFocus();

        editText.findFocus();

    }

}




ChargeActivity.java




package com.example.administrator.bigelephantbike;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.Dialog;

import android.content.Intent;

import android.os.Bundle;

import android.text.TextWatcher;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.LinearLayout;

import android.widget.TextView;

import android.widget.Toast;

import wheelview.ArrayWheelAdapter;

import wheelview.OnWheelChangedListener;

import wheelview.WheelView;

public class ChargeActivity extends Activity implements OnWheelChangedListener,View.OnClickListener{

   private Button recoverBtn;

    private String passwordReturn="123456";

    private String passwordRecover="234567";

    private PasswordDialog myDialog;

    //密码输入是否正确

    private boolean pswResult;

    //实现MyJudgePasswordInterface

    private MyJudgePasswordInterface myJudgePasswordInterface;

    //1标识输入的是还车密码，2表示输入的是恢复密码

    private int flag=0;

    private String []nums={"0","1","2","3","4","5","6","7","8","9"};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_charge);

        returnBtn =(Button)findViewById(R.id.return_btn);

        recoverBtn =(Button)findViewById(R.id.recover_btn);

        myJudgePasswordInterface=new MyJudgePasswordInterface() {

            @Override

            public void returnJudgePasswordResult(boolean result) {

                pswResult = result;
            }

        };

        returnBtn.setOnClickListener(this);

        recoverBtn.setOnClickListener(this);

    }

    @Override

    public void onClick(View v) {

        //当点击还车按钮时

        if(v.getId()==R.id.return_btn){

            flag=1;

            myDialog =new PasswordDialog(ChargeActivity.this,this.getResources().getString(R.string.input_return_code),this.getResources().getString(R.string.return_tips),passwordReturn,myJudgePasswordInterface);

            myDialog.show();

        }

        if(v.getId()==R.id.recover_btn){

            flag=2;

            myDialog=new PasswordDialog(ChargeActivity.this,this.getResources().getString(R.string.input_recover_tips),this.getResources().getString(R.string.recover_tips),passwordRecover,myJudgePasswordInterface);

            myDialog.show();

        }

    }

}




												


											
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