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android，view的重绘
============问题描述============
mars数独制作视频，页面重绘的时候出现了问题，“Unfortunately,shudu08 has stopped.”感觉是某个xml文件没有配置好，求高手帮助纠正错误，顺便告诉下android运行的基本流程。我是纯小白，高手勿喷
进入界面：
点击空白处：
报错：
代码如下：
Game.java
package com.liuyuan.shudu08;
public class Game {
private final String str = "360000000004230800000004200"
+"070460003820000014500013020"
+"001900000007048300000000045";
private int sudoku [] = new int [9*9];
private int used[][][] = new int[9][9][];
public Game(){
sudoku = fromPuzzleString(str);
calculateAllUsedTiles();
}
private int getTile(int x,int y){
return sudoku[9*y+x];
}
public String getTileString(int x,int y){
int v = getTile(x,y);
if(v == 0){
return "";
}
else{
return String.valueOf(v);
}
}
protected int[] fromPuzzleString(String src){
int[] sudo = new int[src.length()];
for(int i=0;i<src.length();i++){
sudo[i] = src.charAt(i) - ‘0‘;
}
return sudo;
}
public void calculateAllUsedTiles(){
for(int x=0;x<9;x++){
for(int y = 0;y<9;y++){
used[x][y] = calculateUsedTiles(x,y);
}
}
}
public int[] getUsedTilesByCoor(int x,int y){
return used[x][y];
}
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;
}
}
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){
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){
sudoku[y*9 + x] = value;
}
}
KeyDialog.java
package com.liuyuan.shudu08;
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{
//用来存放代表对话框当中按钮的对象
private final View keys[] = new View[9];
private final int used[];
private ShuduView shuduView;
//构造函数的第二个参数当中保存着当前单元格已经使用过的数字
public KeyDialog(Context context,int[] used) {
super(context);
this.used = used;
}
//当一个Dialog第一次显示的时候，会调用其onCreate方法
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setTitle("可填写的数字：");
setContentView(R.layout.keypad);
findViews();
for(int i = 0;i<used.length;i++){
if(used[i]!=0){
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);
}
//通知ShuduView对象，刷新整个九宫格显示的数据
private void returnResult(int tile){
shuduView.setSelectedTile(tile);
//调用dismiss方法，取消对话框的显示。
dismiss();
}
private void setListeners(){
//遍历整个keys数组
for(int i=0;i<keys.length;i++){
final int t = i+1;
keys[i].setOnClickListener(new View.OnClickListener() {
public void onClick(View v){
returnResult(t);
}
});
}
}
}
MainActivity.java
package com.liuyuan.shudu08;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
setContentView(new ShuduView(this));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
ShuduView.java
package com.liuyuan.shudu08;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.FontMetrics;
import android.view.MotionEvent;
import android.view.View;
public class ShuduView extends View{
//单元格的宽度和高度
private float width;
private float height;
private int selectedX;
private int selectedY;
private Game game = new Game();
public ShuduView(Context context) {
super(context);
}
protected void onSizeChanged(int w,int h,int oldw,int oldh){
//计算单元格的宽度和高度
this.width = w/9f;
this.height = h/9f;
super.onSizeChanged(w, h, oldw, oldh);
}
protected void onDraw(Canvas canvas){
Paint backgroundPaint = new Paint();
backgroundPaint.setColor(getResources().getColor(R.color.shudu_background));
canvas.drawRect(0, 0, getWidth(), getHeight(), backgroundPaint);
Paint darkPaint = new Paint();
darkPaint.setColor(getResources().getColor(R.color.shudu_dark));
Paint hilitePaint = new Paint();
hilitePaint.setColor(getResources().getColor(R.color.shudu_hilite));
Paint lightPaint = new Paint();
lightPaint.setColor(getResources().getColor(R.color.shudu_light));
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);
}
for(int i = 0;i<9;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);
}
Paint numberPaint = new Paint();
numberPaint.setColor(Color.BLACK);
numberPaint.setStyle(Paint.Style.STROKE);
numberPaint.setTextSize(height*0.75f);
numberPaint.setTextAlign(Paint.Align.CENTER);
FontMetrics fm = numberPaint.getFontMetrics();
float x = width/2;
float y = height/2 - (fm.ascent + fm.descent)/2;
for(int i=0;i<9;i++){
for(int j=0;j<9;j++){
canvas.drawText(game.getTileString(i, j), i*width + x, j*height+y, numberPaint);
}
}
super.onDraw(canvas);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if(event.getAction()!= MotionEvent.ACTION_DOWN){
return super.onTouchEvent(event);
}
selectedX = (int)(event.getX()/width);
selectedY = (int)(event.getY()/height);
int used[] = game.getUsedTilesByCoor(selectedX, selectedY);
StringBuffer sb = new StringBuffer();
for(int i=0;i<used.length;i++){
sb.append(used[i]);
}
KeyDialog keyDialog = new KeyDialog(getContext(),used);
keyDialog.show();
return true;
}
public void setSelectedTile(int tile){
if(game.setTileIfValid(selectedX,selectedY,tile)){
invalidate();
}
}
}
layout内的文件
dialog.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> <TextView android:id="@+id/usedTextId" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello_world"/> </LinearLayout>
keypad.xml
<?xml version="1.0" encoding="utf-8"?> <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>
values内的文件
colors.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <color name="shudu_background">#ffe6f0ff</color> <color name="shudu_hilite">#ffffffff</color> <color name="shudu_light">#64c6d4ef</color> <color name="shudu_dark">#6456648f</color> </resources>
============解决方案1============
报的错是什么，帖logcat来看。
============解决方案2============
//通知ShuduView对象，刷新整个九宫格显示的数据
private void returnResult(int tile){
shuduView.setSelectedTile(tile);
//调用dismiss方法，取消对话框的显示。
dismiss();
}shuduView这个空了吧
============解决方案3============
没看到shuduView的初始化。
============解决方案4============
private ShuduView shuduView=new ShuduView(getContext());
android，view的重绘
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