android 一些控件（button）(label)（还有监听）

AndroidManifest.xml(在这个里面配置了两个activity，一个是自己生成的，一个是自己配置到里面的)

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="mars.activity03"      android:versionCode="1"      android:versionName="1.0">    <application android:icon="@drawable/icon" android:label="@string/app_name">        <activity android:name=".Activity03"                  android:label="@string/app_name">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity><activity android:name=".ResultActivity" android:label="@string/resultLabel"/>    </application>    <uses-sdk android:minSdkVersion="4" /></manifest> 

Activity03.java

package mars.activity03;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;//1.在Activity03当中，要声明四个控件//2.要为其中的两个控件设置显示的值//3.创建一个监听器类，监听按钮按下的动作//4.将监听器类的对象，绑定在按钮对象上public class Activity03 extends Activity {    /** Called when the activity is first created. */private EditText factorOne ;private EditText factorTwo;private TextView symbol;private Button calculate;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        //根据控件的ID来取得代表控件的对象        factorOne = (EditText)findViewById(R.id.factorOne);        factorTwo = (EditText)findViewById(R.id.factorTwo);        symbol = (TextView)findViewById(R.id.symbol);        calculate = (Button)findViewById(R.id.calculate);        //为symbol和calculate设置显示的值//        symbol.setText("乘以");//        calculate.setText("计算");        symbol.setText(R.string.symbol);        calculate.setText(R.string.calculate);        //将监听器的对象绑定到按钮对象上面        calculate.setOnClickListener(new CalculateListener());    }    //当客户点击MENU按钮的时候，调用该方法    @Overridepublic boolean onCreateOptionsMenu(Menu menu) {    menu.add(0, 1, 1, R.string.exit);    menu.add(0,2,2,R.string.about);return super.onCreateOptionsMenu(menu);}    //当客户点击菜单当中的某一个选项时，会调用该方法@Overridepublic boolean onOptionsItemSelected(MenuItem item) {if(item.getItemId() == 1){finish();}return super.onOptionsItemSelected(item);}class CalculateListener implements OnClickListener{public void onClick(View v) {//取得两个EditText控件的值String factorOneStr = factorOne.getText().toString();String factorTwoStr = factorTwo.getText().toString();//将这两个值存放到Intent对象当中Intent intent = new Intent();intent.putExtra("one",factorOneStr);intent.putExtra("two",factorTwoStr);intent.setClass(Activity03.this, ResultActivity.class);//使用这个Intent对象来启动ResultActivityActivity03.this.startActivity(intent);}    }}

ResultActivity.java

package mars.activity03;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;//1.在Activity03当中，要声明四个控件//2.要为其中的两个控件设置显示的值//3.创建一个监听器类，监听按钮按下的动作//4.将监听器类的对象，绑定在按钮对象上public class Activity03 extends Activity {    /** Called when the activity is first created. */private EditText factorOne ;private EditText factorTwo;private TextView symbol;private Button calculate;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        //根据控件的ID来取得代表控件的对象        factorOne = (EditText)findViewById(R.id.factorOne);        factorTwo = (EditText)findViewById(R.id.factorTwo);        symbol = (TextView)findViewById(R.id.symbol);        calculate = (Button)findViewById(R.id.calculate);        //为symbol和calculate设置显示的值//        symbol.setText("乘以");//        calculate.setText("计算");        symbol.setText(R.string.symbol);        calculate.setText(R.string.calculate);        //将监听器的对象绑定到按钮对象上面        calculate.setOnClickListener(new CalculateListener());    }    //当客户点击MENU按钮的时候，调用该方法    @Overridepublic boolean onCreateOptionsMenu(Menu menu) {    menu.add(0, 1, 1, R.string.exit);    menu.add(0,2,2,R.string.about);return super.onCreateOptionsMenu(menu);}    //当客户点击菜单当中的某一个选项时，会调用该方法@Overridepublic boolean onOptionsItemSelected(MenuItem item) {if(item.getItemId() == 1){finish();}return super.onOptionsItemSelected(item);}class CalculateListener implements OnClickListener{public void onClick(View v) {//取得两个EditText控件的值String factorOneStr = factorOne.getText().toString();String factorTwoStr = factorTwo.getText().toString();//将这两个值存放到Intent对象当中Intent intent = new Intent();intent.putExtra("one",factorOneStr);intent.putExtra("two",factorTwoStr);intent.setClass(Activity03.this, ResultActivity.class);//使用这个Intent对象来启动ResultActivityActivity03.this.startActivity(intent);}    }}

layout/main.xml

<?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"    ><EditText android:id="@+id/factorOne"    android:layout_width="fill_parent"     android:layout_height="wrap_content" /><TextView  android:id="@+id/symbol"    android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="@string/hello"    /><EditText android:id="@+id/factorTwo"    android:layout_width="fill_parent"     android:layout_height="wrap_content" /><Buttonandroid:id="@+id/calculate"    android:layout_width="fill_parent"     android:layout_height="wrap_content" /></LinearLayout>

layout/result.xml

<?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"    >    <TextView    android:id="@+id/result"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    /></LinearLayout>