android-猜数游戏xaxb

package zhang.app.myXAXB;

import zhang.xaxb.R;
import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class xaxb extends Activity {

	private EditText editText;
	private TextView textView;
	private Button ok;
	private int m_aNum[] = new int[4];
	private char input[] = new char[4];
	private	int  in=0;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.xaxb_main);
		
		editText = (EditText) findViewById(R.id.editText);
		textView = (TextView) findViewById(R.id.textView);
		ok = (Button) findViewById(R.id.button);
		ok.setEnabled(false);
		
		ok.setOnClickListener(new Button.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub

				if (editText.getText().toString().equalsIgnoreCase("")) {
					
				} else {
					String snum=editText.getText().toString();
					in = Integer.parseInt(editText.getText().toString());
						if ((in > 1000) && (in < 10000)){// 四位数
							for(int i=0;i<4;i++){
								input[i]=snum.charAt(i);
							}
							for(int i=0;i<4;i++)	
								for(int j=0;j<i;j++){
									if(input[i]==input[j]){
										Toast.makeText(xaxb.this, "输入错误",Toast.LENGTH_SHORT).show();
										editText.setText("");
									}	
								}
								}
						else{//结束位数检查
							Toast.makeText(xaxb.this, "输入错误",Toast.LENGTH_SHORT).show();
							 editText.setText("");
							}
						}
				for (int i = 0; i < input.length; i++) {
					System.out.println("Input---"+input[i]);
				}
				int nA=0,nB=0;
				for (int i = 0; i < 4; i++) {
					for (int j = 0; j < 4; j++) {
						if ((int) input[i] - '0' == m_aNum[j]) {
							if (i == j) {
								nA++;
							} else {
								nB++;
							}
						}
					}
				}
				textView.setText(nA + "A" + nB + "B");
				
				if(nA==4){
					textView.setTextColor(android.graphics.Color.YELLOW);
					ok.setEnabled(false);
					new AlertDialog.Builder(xaxb.this).setTitle("结果").setMessage("答对了！").show();
				}
			}
		});
	}
	// 初始化生成随机数
	public void init() {
		ok.setEnabled(true);
		
		for (int i = 0; i < 4; i++) {
			m_aNum[i] = (int) (Math.random() * 10);
				if(m_aNum[0]==0){
					m_aNum[0] = (int) (Math.random() * 10);
				}else{}
				}
	while(isdouble()){
		for(int k=0;k<4;k++)	
			for(int j=0;j<k;j++){
						while (m_aNum[j] == m_aNum[k]) {
							m_aNum[k]=(int) (Math.random() * 10);
						}
					}
		}
		
	};
	
	public boolean isdouble(){
		for(int k=0;k<4;k++)	
			for(int j=0;j<k;j++){
						if(m_aNum[j] == m_aNum[k]) {
						return true;	
						}
					}
		return false;
	};
	// menu
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// TODO Auto-generated method stub
		menu.add(0, 1, 1, "开始");
		menu.add(0, 2, 2, "帮助");
		menu.add(0,3,3,"退出");
		return super.onCreateOptionsMenu(menu);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		switch (item.getItemId()) {
		case 1:
			init();
			textView.setText("");
			editText.setText("");
			break;
		case 3:
			finish();
			break;
		case 2:
			new AlertDialog.Builder(xaxb.this).setTitle("帮助").setMessage("这是个猜数游戏！\n " +
					"nA表示n个位上的数值和位置都是对的。\n mB代表m个位上的数值是对的，但是位置错误。")
					.show();
		}
		return super.onOptionsItemSelected(item);
	}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <TableLayout android:layout_width="fill_parent" android:id="@+id/tableLayout1" android:layout_height="wrap_content">
        <TableRow android:id="@+id/tableRow1" android:layout_width="wrap_content" android:layout_height="wrap_content">
            <EditText  android:layout_weight="7" android:singleLine="true" android:inputType="number" android:layout_height="fill_parent" android:layout_width="fill_parent" android:id="@+id/editText"></EditText>
            <Button android:layout_weight="1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/button" android:text="@string/ok"></Button>
        </TableRow>
    </TableLayout>
    <TextView android:layout_height="fill_parent" android:id="@+id/textView"  android:layout_width="fill_parent" android:textSize="40dip"></TextView>
</LinearLayout>