//线性垂直布局：一个EditView文本、一个Button按钮
 1 <LinearLayout 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:orientation="vertical" 6     android:paddingBottom="@dimen/activity_vertical_margin" 7     android:paddingLeft="@dimen/activity_horizontal_margin" 8     android:paddingRight="@dimen/activity_horizontal_margin" 9     android:paddingTop="@dimen/activity_vertical_margin"10     tools:context=".PhoneActivity" >11 12     <TextView13         android:layout_width="wrap_content"14         android:layout_height="wrap_content"15         android:text="请输入电话" />16 17     <EditText18         android:id="@+id/editText1"19         android:layout_width="fill_parent"20         android:layout_height="wrap_content"21         android:inputType="phone" />22 23     <Button24         android:id="@+id/callsumbit"25         android:layout_width="wrap_content"26         android:layout_height="wrap_content"27         android:layout_gravity="center"28         android:text="拨打电话" />29 30 </LinearLayout>

 1 protected void onCreate(Bundle savedInstanceState) { 2         super.onCreate(savedInstanceState); 3         setContentView(R.layout.activity_call); 4         Button btn = (Button) findViewById(R.id.callsumbit); 5         btn.setOnClickListener(new OnClickListener() { 6  7             @Override 8             public void onClick(View v) { 9                 EditText etNumber = (EditText) findViewById(R.id.editText1);10 11                 String number = etNumber.getText().toString();12                 Intent intent = new Intent();13                 intent.setAction(Intent.ACTION_CALL);14                 intent.setData(Uri.parse("tel:" + number));15                 startActivity(intent);16             }17         });18     }

 1 <?xml version="1.0" encoding="utf-8"?> 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 3     package="com.ccec.callphone" 4     android:versionCode="1" 5     android:versionName="1.0" > 6  7     <uses-sdk 8         android:minSdkVersion="8" 9         android:targetSdkVersion="18" />10     <uses-permission android:name="android.permission.CALL_PHONE"/>11 12     <application13         android:allowBackup="true"14         android:icon="@drawable/ic_launcher"15         android:label="@string/app_name"16         android:theme="@style/AppTheme" >17         <activity18             android:name="com.ccec.callphone.CallActivity"19             android:label="@string/app_name" >20             <intent-filter>21                 <action android:name="android.intent.action.MAIN" />22 23                 <category android:name="android.intent.category.LAUNCHER" />24             </intent-filter>25         </activity>26     </application>27 28 </manifest>