import com.example.calculator.R;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.RadioGroup;

import android.widget.RadioGroup.OnCheckedChangeListener;

import android.widget.TextView;

public class panduanset extends Activity {

    private TextView panduannumber;

    private RadioGroup panduanRG;

    private int i,g;

    private Button panduanxunlian;

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_panduan_set);

        panduannumber=(TextView)findViewById(R.id.panduannumber);

        panduanRG=(RadioGroup)findViewById(R.id.panduangroup);

        panduanxunlian=(Button)findViewById(R.id.panduanxunlian);

        panduanRG.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override

            public void onCheckedChanged(RadioGroup arg0, int arg1) {

                // TODO Auto-generated method stub

                i=arg1;

            }

        });

        panduanxunlian.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View arg0) {

                // TODO Auto-generated method stub

                g=Integer.valueOf(panduannumber.getText().toString());

                Intent intent=new Intent();

                Bundle bundle=new Bundle();

                bundle.putInt("panduansuanfa", i);

                bundle.putInt("panduanshumu",g);

                intent.setClass(panduanset.this,panduanActivity.class);

                intent.putExtras(bundle);

                startActivity(intent);

            }

        });

    }

    @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;

    }

}

import java.util.Random;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

public class panduanActivity extends Activity{

    private Button next1;

    private Button result1;

    private TextView timu1;

    private int index,i;

    private int k,j,l,sum;

    private char a;

    private final Random num1=new Random();

    private final Random num2=new Random();

    private final Random r = new Random();

    private char[] ch = {'+','-','*','/'};

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_panduan);

        Bundle bundle=getIntent().getExtras();

        index=bundle.getInt("panduansuanfa");

        a=ch[index];

        i=bundle.getInt("panduanshumu");

        String c=String.valueOf(num1.nextInt());

        String b=String.valueOf(num2.nextInt());

        String g=String.valueOf(r.nextInt());

        k=Integer.valueOf(g);

        l=Integer.valueOf(c);

        j=Integer.valueOf(b);

        String d=String.valueOf(a);

        switch(index){

        case :

            sum=l+j;

            break;

        case :

            sum=l-j;

            break;

        case :

            sum=l*j;

            break;

        case :

            sum=l/j;

            break;

        }

        switch(k){

        case :

            timu1.setText(c+d+b+"="+String.valueOf(sum));

            break;

        case :

            timu1.setText(c+d+b+"="+String.valueOf(sum+));

            break;

        case :

            timu1.setText(c+d+b+"="+String.valueOf(sum+));

            default:

                break;

        }

    }

    @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;

    }

}