android发送短信

package cn.itcast.sms;import java.util.ArrayList;import android.app.Activity;import android.os.Bundle;import android.telephony.SmsManager;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity {    private EditText numberText;    private EditText contentText;        @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                numberText = (EditText) this.findViewById(R.id.number);        contentText = (EditText) this.findViewById(R.id.content);        Button button = (Button) this.findViewById(R.id.button);        button.setOnClickListener(new ButtonClickListener());    }        private final class ButtonClickListener implements View.OnClickListener{public void onClick(View v) {String number = numberText.getText().toString();String content = contentText.getText().toString();SmsManager manager = SmsManager.getDefault();ArrayList<String> texts = manager.divideMessage(content);for(String text : texts){manager.sendTextMessage(number, null, text, null, null);}Toast.makeText(MainActivity.this, R.string.success, Toast.LENGTH_LONG).show();}        }}

<uses-permission android:name="android.permission.SEND_SMS"/>