003_01电话拨号器

 1 package com.example.phoneDail;
 2
 3 import android.app.Activity;
 4 import android.content.Intent;
 5 import android.net.Uri;
 6 import android.os.Bundle;
 7 import android.view.View;
 8 import android.view.View.OnClickListener;
 9 import android.widget.Button;
10 import android.widget.EditText;
11
12
13 public class MainActivity extends Activity {
14
15     @Override
16     protected void onCreate(Bundle savedInstanceState) {
17         super.onCreate(savedInstanceState);
18         setContentView(R.layout.activity_main);
19
20         findViewById(R.id.button1);
21         Button bt = (Button)findViewById(R.id.button1);
22         bt.setOnClickListener(new MyListener());
23
24     }
25     private class MyListener implements OnClickListener{
26
27         @Override
28         public void onClick(View v) {
29             EditText phoneDail = (EditText) MainActivity.this.findViewById(R.id.phoneDail);
30             String number = phoneDail.getText().toString();
31             Intent intent = new Intent();
32             intent.setAction(Intent.ACTION_CALL);
33             intent.setData(Uri.parse("tel:" +number));
34             startActivity(intent);
35         }
36
37
38     }
39
40
41 }

MainActivity.java

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:paddingBottom="@dimen/activity_vertical_margin"
 6     android:paddingLeft="@dimen/activity_horizontal_margin"
 7     android:paddingRight="@dimen/activity_horizontal_margin"
 8     android:paddingTop="@dimen/activity_vertical_margin"
 9     tools:context="com.example.phoneDail.MainActivity" >
10
11     <EditText
12         android:id="@+id/phoneDail"
13         android:layout_width="match_parent"
14         android:layout_height="wrap_content"
15         android:layout_alignParentTop="true"
16         android:inputType="phone" >
17
18         <requestFocus />
19     </EditText>
20
21     <Button
22         android:id="@+id/button1"
23         android:layout_width="wrap_content"
24         android:layout_height="wrap_content"
25         android:layout_alignRight="@id/phoneDail"
26         android:layout_alignEnd="@id/phoneDail"
27         android:layout_below="@+id/phoneDail"
28         android:text="@string/dail" />
29
30 </RelativeLayout>

activity_main.xml

效果图：