public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);

    mobileEditText = (EditText) this.findViewById(R.id.app_name);

    mobileButton = (Button) this.findViewById(R.id.button);

    mobileButton.setOnClickListener(new View.OnClickListener() {  

        @Override

            public void onClick(View v) {

            // TODO Auto-generated method stub

            String mobile = mobileEditText.getText().toString();

            Intent intent = new Intent(Intent.ACTION_CALL,Uri.parse("tel:"+mobile));

            androidTest2Activity.this.startActivity(intent);

        }

    });

}

--------------------------------------------------------------------------------------  

public void onClick(View v) {

    // TODO Auto-generated method stub

    String mobile = mobileText.getText().toString();

    String content = contentText.getText().toString();

    SmsManager smsManager = SmsManager.getDefault();

    if(content.length()>70){

        List<String> contents=smsManager.divideMessage(content);

        for(String sms:contents){

            smsManager.sendTextMessage(mobile, null, sms, null, null);

        }

    }

    else{

        smsManager.sendTextMessage(mobile, null, content, null, null);

    }

    Toast.makeText(SMSActivity.this, "发送成功", 2).show();

}   

//本文出自 “阿凡达” 博客，请务必保留此出处http://shamrock.blog.51cto.com/2079212/702527