003_01电话拨号器

package com.example.phoneDail;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;


public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        findViewById(R.id.button1);
        Button bt = (Button)findViewById(R.id.button1);
        bt.setOnClickListener(new MyListener());
                
    }
    private class MyListener implements OnClickListener{

        @Override
        public void onClick(View v) {
            EditText phoneDail = (EditText) MainActivity.this.findViewById(R.id.phoneDail);
            String number = phoneDail.getText().toString();
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_CALL);
            intent.setData(Uri.parse("tel:" +number));
            startActivity(intent);
        }
        
        
    }
    

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.phoneDail.MainActivity" >

    <EditText
        android:id="@+id/phoneDail"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:inputType="phone" >

        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@id/phoneDail"
        android:layout_alignEnd="@id/phoneDail"
        android:layout_below="@+id/phoneDail"
        android:text="@string/dail" />

</RelativeLayout>

效果图：