Android-乘法

/**********************Activity03 ***************/

package com.cs.dxm.activity03;

import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;

public class Activity03 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_03);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
        Button button =(Button)findViewById(R.id.caculate);
        button.setOnClickListener(new MyButtonListener());
    }

    class MyButtonListener implements View.OnClickListener{

        @Override
        public void onClick(View v) {
            EditText text1 = findViewById(R.id.factorOne);
            String factorOneStr = text1.getText().toString();

            EditText text2 = findViewById(R.id.factorTwo);
            String factorTwoStr = text2.getText().toString();
            Intent intent = new Intent();

            intent.putExtra("one",factorOneStr);
            intent.putExtra("two",factorTwoStr);
            intent.setClass(Activity03.this,ResultActivity.class);
            Activity03.this.startActivity(intent);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        menu.add(0,1,1,R.string.quit_text);
        menu.add(0,2,2,R.string.about_text);
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_activity03, 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();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }
        if (id == 1) {
           finish();
        }
        return super.onOptionsItemSelected(item);
    }
}

 

/**********************************ResultActivity **************************************/

package com.cs.dxm.activity03;

import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.TextView;

public class ResultActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_result);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });

        Intent intent = getIntent();
        String factorOneStr = intent.getStringExtra("one");
        String factorTwoStr = intent.getStringExtra("two");
        int factorOne = Integer.parseInt(factorOneStr);
        int factorTwo = Integer.parseInt(factorTwoStr);
        int result = factorOne*factorTwo;
        TextView textView = (TextView)findViewById(R.id.result);
        textView.setText(result+"");
    }

}