Android开发-自定义View-AndroidStudio(二十六)数独(3)Dialog监听

老规矩，先上GIF动态图，看个效果，如果符合你的项目或肯定你要了解的内容，再往下看吧：

看1下代码里面的K1，K2，K3，K4，K5，K6，就能够了解函数运行的顺序，最后在看1下setTileIfValid方法就能够了。

package com.iwanghang.newview;

import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.view.View;

// 该类用于实现Dialog，实现自定义的对话框功能
public class KeyDialog extends Dialog {
    // 用来寄存代表对话框当中按钮的对象
    private final View keys [] = new View[9];
    private final int used[];
    private NewView newView;

    // 构造函数的第2个参数当中保存着当前单元格已使用过的数字
    public KeyDialog(Context context, int [] used){
        super(context);
        this.used = used;
    }

    // 构造函数的第2个参数当中保存着当前单元格已使用过的数字
    public KeyDialog(Context context,int [] used,NewView newView){
        super(context);
        this.used = used;
        this.newView = newView;
    }

    // 当1个Dialog第1次显示的时候，会调用其onCreate方法
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 设置对话框的标题
        setTitle("KeyDialog");
        // 用于为该Dialog设置布局文件
        setContentView(R.layout.keypad);
        //
        findViews();
        // 遍历全部used数组
        for (int i = 0; i <used.length; i++) {
            if(used[i] != 0){
                System.out.println(used[i]);
                keys[used[i] - 1].setVisibility(View.INVISIBLE);
            }
        }
        // 为对话框当中所有的按钮设置监听器
        setListeners();
    }

    private void findViews() {
        keys[0] = findViewById(R.id.keypad_1);
        keys[1] = findViewById(R.id.keypad_2);
        keys[2] = findViewById(R.id.keypad_3);
        keys[3] = findViewById(R.id.keypad_4);
        keys[4] = findViewById(R.id.keypad_5);
        keys[5] = findViewById(R.id.keypad_6);
        keys[6] = findViewById(R.id.keypad_7);
        keys[7] = findViewById(R.id.keypad_8);
        keys[8] = findViewById(R.id.keypad_9);
    }






    // KeyDialog初始化的时候，设置数字按键监听，K1
    private void setListeners() {
        // 遍历全部keys数组
        for (int i = 0; i < keys.length; i++) {
            final int keyPress = i + 1;
            keys[i].setOnClickListener(new View.OnClickListener() {
                public void onClick(View v) {
                    returnResult(keyPress); // 返回点击的数字，K2
                }
            });
        }
    }
    // 通知NewView对象，刷新全部9宫格显示的数据
    private void returnResult(int tile) {
        newView.setSelectedTile(tile); // 调用NewView中的方法，K3
        // 取消对话框的显示
        dismiss();
    }




}

package com.iwanghang.newview;

import android.app.AlertDialog;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;

public class NewView extends View{
    // 单元格的宽度和高度
    private float width;
    private float height;

    private int checkPoint = 1; // 当前关卡

    private MainActivity mainActivity = (MainActivity) getContext();

    //private Number number = new Number();
    private Number number = new Number(checkPoint);

    private int selectedX;
    private int selectedY;

    public NewView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public NewView(MainActivity mainActivity) {
        super(mainActivity);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        this.width = w / 9f;
        this.height = h / 10f;
        super.onSizeChanged(w, h, oldw, oldh);
    }

    // 当Android系统需要绘制1个View对象时，就会调用该对象的onDraw
    @Override
    protected void onDraw(Canvas canvas) {
        System.out.println("AAA onDraw -----------------");
        // 画背景
        Paint backgroundPaint = new Paint();
        backgroundPaint.setColor(getResources().getColor(R.color.colorBackground));
        canvas.drawRect(0,0,getWidth(),getHeight(),backgroundPaint);

        Paint darkPaint = new Paint();
        darkPaint.setColor(getResources().getColor(R.color.colorDark));

        Paint hilitePaint = new Paint();
        hilitePaint.setColor(getResources().getColor(R.color.colorHilite));

        Paint lightPaint = new Paint();
        lightPaint.setColor(getResources().getColor(R.color.colorLight));

        // 绘制9X9的网络格
        // 两条距离为1的直线，视觉上会有割裂的效果
        for (int i = 0; i < 9; i++) {
            canvas.drawLine(0, i*height, getWidth(), i*height, lightPaint);
            canvas.drawLine(0, i*height+1, getWidth(), i*height+1, hilitePaint);
            canvas.drawLine(i*width, 0, i*width, getHeight(), lightPaint);
            canvas.drawLine(i*width+1, 0, i*width+1, getHeight(), hilitePaint);
        }

        // 绘制3X3的网络格
        for (int i = 0; i < 10; i++) {
            if (i % 3 != 0) {
                continue;
            }
            canvas.drawLine(0, i*height, getWidth(), i*height, darkPaint);
            canvas.drawLine(0, i*height+1, getWidth(), i*height+1, hilitePaint);
            canvas.drawLine(i*width, 0, i*width, getHeight(), darkPaint);
            //canvas.drawLine(i*width+1, 0, i*width+1, getHeight(), hilitePaint);
            canvas.drawLine(i*width, 1, i*width, getHeight(), hilitePaint);
        }

        // 绘制数字
        Paint numberPaint = new Paint();
        numberPaint.setColor(Color.BLACK);
        numberPaint.setStyle(Paint.Style.STROKE);
        numberPaint.setTextSize(height*0.75f);
        numberPaint.setTextAlign(Paint.Align.CENTER);
        numberPaint.setAntiAlias(true); // 抗锯齿

        /**
         * 数字居中位置
         * x轴居中比较容易计算
         * y轴居中的计算，依赖于FontMetrics，大家很容易百度到相干的知识
         */
        Paint.FontMetrics fm = numberPaint.getFontMetrics();
        float x = width / 2;
        float y = height / 2 - (fm.ascent + fm.descent) / 2;

//        canvas.drawText("1", 0 * width + x, 0 * height + y, numberPaint);
//        canvas.drawText("2", 1 * width + x, 1 * height + y, numberPaint);
//        canvas.drawText("3", 2 * width + x, 2 * height + y, numberPaint);
//        canvas.drawText("4", 3 * width + x, 3 * height + y, numberPaint);
//        canvas.drawText("5", 4 * width + x, 4 * height + y, numberPaint);

//        /**
//         * 根据Number类中的数组，绘制数字
//         */
//        for (int i = 0; i < 9; i++) {
//            for (int j = 0; j < 9; j++) {
//                canvas.drawText(number.getTileString(i,j), i*width+x, j*height+y, numberPaint);
//                mainActivity.playSound();
//                handler.sendEmptyMessageDelayed(0, 200); // 每次重绘后，等待200毫秒，给handler发消息
//            }
//        }

        /**
         * 绘制1个刷新文字
         */
        canvas.drawText("刷新",4*width+x,9*height+y,numberPaint);

        /**
         * 绘制关卡文字
         */
        Paint strPaint = new Paint();
        strPaint.setTextSize(height*0.5f);
        strPaint.setAntiAlias(true); // 抗锯齿
        canvas.drawText("第" + checkPoint + "关",6*width+x,9*height+y,strPaint);

        //super.onDraw(canvas);
//        canvas.drawText(number.getTileString(numberX,numberY), numberX*width+x, numberY*height+y, numberPaint);
//        System.out.println("numberY = " + numberY);
//        if (numberY < 9){
//            if (number.getTileString(numberX,numberY) != ""){
//                mainActivity.playSound();
//                handler.sendEmptyMessageDelayed(0, 200); // 每次重绘后，等待200毫秒，给handler发消息
//            }else {
//                handler.sendEmptyMessageDelayed(0, 0); // 每次重绘后，等待500毫秒，给handler发消息
//            }
//        }


        /**
         * 优先绘制上1次绘制过的数字
         */
        int numberIndexOld = 0;
        int ii = 0;
        int jj = 0;
        if (numberIndex != 0){ // 首次绘制，没有上1次绘制过的数字，所以不进入这个方法
            System.out.println("AAA 优先绘制上1次绘制过的数字 numberIndex = " + numberIndex);
            outterLoop1:
            for (int i = 0; i < 9; i++) {
                for (int j = 0; j < 9; j++) {
                    canvas.drawText(number.getTileString(i,j), i*width+x, j*height+y, numberPaint);
                    System.out.println("AAA 优先绘制上1次绘制过的数字 number = " + number.getTileString(i,j) + " | i = " + i
                            + " | j = " + j + " | numberIndexOld = " + numberIndexOld);
                    if (numberIndexOld == (numberIndex⑴)){
                        ii = i;
                        jj = j;
                        break outterLoop1;
                    }
                    numberIndexOld = numberIndexOld + 1 ;
                }
            }
            jj = jj + 1;
            if (jj == 9){
                jj = 0;
                ii = ii + 1;
            }
        }

        int getOld = 0;
        /**
         * 根据Number类中的数组，绘制数字
         */
        System.out.println("AAA0 绘制数字 jj = " + jj + " | ii = " + ii);
        outterLoop2:
        for (int i = 0; i < 9; i++) {
            for (int j = 0; j < 9; j++) {
                if (getOld == 0){ // 继续上1次绘制的数字的i和j，继续绘制
                    i = ii;
                    j = jj;
                    getOld = 1;
                }
                canvas.drawText(number.getTileString(i,j), i*width+x, j*height+y, numberPaint);
                numberIndex = numberIndex + 1 ;
                System.out.println("AAA0 绘制数字 number = " + number.getTileString(i,j) + " | i = " + i
                        + " | j = " + j);
                // 绘制进程中 遇到 不为空的数字 ， 播放音效 并 延迟300毫秒
                System.out.println();
                if (number.getTileString(i,j) != "" && numberIndex<81){
                    mainActivity.playSound(); // 调用MainActivity里的方法，播放音效
                    handler.sendEmptyMessageDelayed(0, 1); // 等待300毫秒，给handler发消息
                    break outterLoop2;
                }
            }
        }



    }

    /**
     * 获得按下的数字
     */
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        super.onTouchEvent(event);
        if (event.getAction() == MotionEvent.ACTION_DOWN){
            selectedX = (int)(event.getX() / width);
            selectedY = (int)(event.getY() / height);

            StringBuffer sb = new StringBuffer();

            if (selectedY < 9){
                int used[] = number.getUsedTilesByCoor(selectedX,selectedY);
                for (int i = 0; i < used.length; i++) {
                    sb.append(used[i]);
                }
                //LayoutInflater layoutInflater = LayoutInflater.from(this.getContext());
                //View layoutView = layoutInflater.inflate(R.layout.dialog,null);
                //TextView textView = (TextView) layoutView.findViewById(R.id.usedTextId);
                //textView.setText("该位置不可用数字 = " + sb.toString());
                //AlertDialog.Builder builder = new AlertDialog.Builder(this.getContext());
                //builder.setView(layoutView);
                //AlertDialog dialog = builder.create();
                //dialog.show();
                KeyDialog keyDialog = new KeyDialog(getContext(), used, this);
                keyDialog.show();
            }

            //Toast.makeText(getContext(), "ACTION_DOWN = " + used, Toast.LENGTH_SHORT).show();
            if (selectedY == 9){
                if (selectedX>=3 && selectedX<=5){
                    //Toast.makeText(getContext(), "ACTION_DOWN = 刷新",Toast.LENGTH_SHORT).show();
                    if (checkPoint == 1){
                        checkPoint = 2;
                    } else if (checkPoint == 2){
                        checkPoint = 1;
                    }
                    //Toast.makeText(getContext(), "checkPoint = " + checkPoint, Toast.LENGTH_SHORT).show();
                    number = new Number(checkPoint);
                    numberIndex = 0;
                    invalidate(); // onDraw()
                }
            }

        }
        return true;
    }

    private int numberIndex = 0; // 绘制完成的数字，下标81
    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            invalidate(); // onDraw();
        }
    };

    // KeyDialog当按下1个数字，隐藏KeyDialog后，会调用下面这个方法，K4
    public void setSelectedTile(int tile) {
        System.out.println("BBB = selectedX = " + selectedX + " | selectedY = " + selectedY + " | tile = " + tile);
        if (number.setTileIfValid(selectedX, selectedY, tile)) { // 设置按下的数字到数组中，并判断是不是为真，K5
            invalidate(); // onDraw()，K6
        }
    }
}

package com.iwanghang.newview;

public class Number {
    // 定义81个数字
    // str1、str2 各代表1个关卡
    private final String str1 = "600040800084005032000090700563180400009027000708604391" +
            "392476518150900200047512063";
    private final String str2 = "102004007000080000006000000050000380000000000000902000" +
            "000000070000000102089030000";

    // 实例化1个下标81的数组
    private int number[] = new int[9*9];

    // 存储不可用数据
    private int used[][][] = new int[9][9][];

    public Number(){
        number = fromPuzzleString(str1);
    }

    public Number(int str){
        if (str == 1){
            number = fromPuzzleString(str1);
        }else if (str == 2){
            number = fromPuzzleString(str2);
        }
        calculateAllUsedTiles(); // 获得当前关卡不可用数字数组
    }

    // 把81个数字设置到数组中，为0的设置为空
    private int[] fromPuzzleString(String str) {
        int[] number = new int[str.length()];
        for (int i = 0; i < number.length; i++) {
            number[i] = str.charAt(i) - '0';
        }
        return number;
    }

    // 根据数字在第几行第几个，获得其在数组中的下表
    private int getTile(int x, int y){
        //return number[y * 9 + x];
        if (y * 9 + x < 81){
            return number[y * 9 + x];
        }else {
            return 0;
        }
    }

    // 获得数字的字符串类型
    public String getTileString(int x, int y){
        int v = getTile(x,y);
        if (v == 0){
            return "";
        }else
            return String.valueOf(v);
    }






    public int[] getUsedTilesByCoor(int x,int y){
        return used[x][y];
    }

    public void calculateAllUsedTiles() {
        for (int x = 0; x < 9; x++) {
            for (int y = 0; y < 9; y++) {
                used[x][y] = calculateUsedTiles(x, y);
            }
        }
    }

    /**
     * 获得当前关卡不可用数字数组
     */
    public int[] calculateUsedTiles(int x, int y) {
        int c[] = new int[9];

        for (int i = 0; i < 9; i++) {
            if (i == y)
                continue;
            int t = getTile(x, i);
            if (t != 0)
                c[t - 1] = t;
        }

        for (int i = 0; i < 9; i++) {
            if (i == x)
                continue;
            int t = getTile(i, y);
            if (t != 0)
                c[t - 1] = t;
        }

        int startx = (x / 3) * 3;
        int starty = (y / 3) * 3;
        for (int i = startx; i < startx + 3; i++) {
            for (int j = starty; j < starty + 3; j++) {
                if (i == x && j == y)
                    continue;
                int t = getTile(i, j);
                if (t != 0)
                    c[t - 1] = t;
            }
        }
        // compress
        int nused = 0;
        for (int t : c) {
            if (t != 0)
                nused++;
        }
        int c1[] = new int[nused];
        nused = 0;
        for (int t : c) {
            if (t != 0)
                c1[nused++] = t;
        }
        return c1;
    }








    protected boolean setTileIfValid(int x, int y, int value) {
        System.out.println("Number BBB = x = " + x + " | y = " + y + " | value = " + value);
        int tiles[] = getUsedTiles(x, y);
        if (value != 0) {
            for (int tile : tiles) {
                if (tile == value)
                    return false;
            }
        }
        setTile(x, y, value);
        calculateAllUsedTiles();
        return true;
    }

    protected int[] getUsedTiles(int x, int y) {
        return used[x][y];
    }

    private void setTile(int x, int y, int value) {
        number[y * 9 + x] = value;
    }
}

package com.iwanghang.newview;

import android.media.AudioManager;
import android.media.SoundPool;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    private SoundPool soundPool;
    private static int soundId;
    int resId = R.raw.doo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getSupportActionBar().hide();
        //setContentView(R.layout.activity_main);

        NewView newView = new NewView(this);

        setContentView(newView);
        initSoundPool(resId);
    }

    public void initSoundPool(int resId) { // 初始化声音池
        soundPool = new SoundPool(
                3, // maxStreams参数，该参数为设置同时能够播放多少音效
                AudioManager.STREAM_MUSIC, // streamType参数，该参数设置音频类型，在游戏中通常设置为：STREAM_MUSIC
                1 // srcQuality参数，该参数设置音频文件的质量，目前还没有效果，设置为0为默许值。
        );
        soundId = soundPool.load(this, resId, 1);
    }

    public void playSound() { // 播放声音,参数sound是播放音效的id，参数number是播放音效的次数
        soundPool.play(
                soundId, // 播放的音乐id
                1, // 左声道音量
                1, // 右声道音量
                1, // 优先级，0为最低
                0, // 循环次数，0无不循环，⑴无永久循环
                1 // 回放速度 ，该值在0.5⑵.0之间，1为正常速度
        );
    }

    public void stopSound() { // 播放声音,参数sound是播放音效的id，参数number是播放音效的次数
        if (soundPool != null && soundId > 0) {
            soundPool.stop(soundId);
            soundPool.release();
        }
    }

}

<?xml version="1.0" encoding="utf⑻"?>
<!--
 ! Excerpted from "Hello, Android!",
 ! published by The Pragmatic Bookshelf.
 ! Copyrights apply to this code. It may not be used to create training material,
 ! courses, books, articles, and the like. Contact us if you are in doubt.
 ! We make no guarantees that this code is fit for any purpose.
 ! Visit http://www.pragmaticprogrammer.com/titles/eband for more book information.
-->
<TableLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/keypad"
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:stretchColumns="*">
    <TableRow>
        <Button android:id="@+id/keypad_1"
            android:text="1">
        </Button>
        <Button android:id="@+id/keypad_2"
            android:text="2">
        </Button>
        <Button android:id="@+id/keypad_3"
            android:text="3">
        </Button>
    </TableRow>
    <TableRow>
        <Button android:id="@+id/keypad_4"
            android:text="4">
        </Button>
        <Button android:id="@+id/keypad_5"
            android:text="5">
        </Button>
        <Button android:id="@+id/keypad_6"
            android:text="6">
        </Button>
    </TableRow>
    <TableRow>
        <Button android:id="@+id/keypad_7"
            android:text="7">
        </Button>
        <Button android:id="@+id/keypad_8"
            android:text="8">
        </Button>
        <Button android:id="@+id/keypad_9"
            android:text="9">
        </Button>
    </TableRow>
</TableLayout>

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