public class MainActivity extends Activity {
EditText mPhoneNum,mMessage;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mPhoneNum=(EditText) findViewById(R.id.editText1);
mMessage=(EditText) findViewById(R.id.editText2);
}
public void onClick(View v) {
int id = v.getId();
String phoneNo = mPhoneNum.getText().toString();
//呼叫
if(id == R.id.button1){
Intent i = new Intent();
//設置動作名稱
i.setAction("android.intent.action.CALL");
//設置意圖數據
i.setData(Uri.parse("tel:" + phoneNo));
//開始活動
startActivity(i);
}
//發短信
else if(id == R.id.button2){
String smsContent = mMessage.getText().toString();
//得到默認的短信管理器
SmsManager sm = SmsManager.getDefault();
sm.sendTextMessage(phoneNo, null, smsContent, null, null);
//提示用戶信息,臨時性通知
Toast toast = Toast.makeText(MainActivity.this, "發送完成", Toast.LENGTH_LONG);
toast.setGravity(Gravity.TOP|Gravity.RIGHT, 50, 100);
toast.show();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}

<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"
tools:context=".MainActivity" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:onClick="onClick"
android:text="打電話" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/button1"
android:onClick="onClick"
android:text="發短信" />
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/button1"
android:ems="10"
android:hint="請輸入電話號碼"
android:inputType="number" >
<requestFocus />
</EditText>
<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="100dip"
android:layout_alignParentLeft="true"
android:layout_below="@+id/editText1"
android:hint="請輸入短信內容"
android:ems="10" />
</RelativeLayout>