Android开发实现拨打电话与发送信息的方法分析

package com.wenzhi.interndemo;
import java.net.URL;
import android.net.Uri;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.app.Activity;
import android.content.Intent;
/**
 * 拨打电话与发送信息
 * @author xiaowen
 * @2016-1-5 下午10:48:53
 */
public class ThreeActivity extends Activity implements OnLongClickListener {
  private EditText edit_main_number;
  private EditText edit_main_content;
  private Button btn_call;
  private Button btn_send;
  private OnClickListener listener=new OnClickListener() {
    @Override
    public void onClick(View v) {
      if(v==btn_call){
        //点击拨打电话 创建一个Intent(隐式)
        //String action=Intent.ACTION_DIAL;
        //Intent intent=new Intent(action);
        Intent intent=new Intent(Intent.ACTION_DIAL);
        //携带数据
        String number=edit_main_number.getText().toString();
        intent.setData(Uri.parse("tel:"+number));
        //启动Activity
        startActivity(intent);
      }else if(v==btn_send){
        //点击发送信息  创建一个Intent(隐式)
        Intent intent=new Intent(Intent.ACTION_SENDTO);
        //携带数据
        String number=edit_main_number.getText().toString();
        String cOntent=edit_main_content.getText().toString();
        intent.setData(Uri.parse("smsto:"+number));
        intent.putExtra("sms_body", content);
        startActivity(intent);
      }
    }
  };
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_three);
    edit_main_number=(EditText) findViewById(R.id.edit_main_number);
    edit_main_cOntent=(EditText) findViewById(R.id.edit_main_content);
    btn_call=(Button) findViewById(R.id.btn_call);
    btn_send=(Button) findViewById(R.id.btn_send);
    //给视图对象设置点击监听
    btn_call.setOnClickListener(listener);
    btn_send.setOnClickListener(listener);
    //给视图对象设置长按监听
    btn_call.setOnLongClickListener(this);
    btn_send.setOnLongClickListener(this);
  }
  @Override
  public boolean onLongClick(View v) {
    if(v==btn_call){
     //长按拨打电话 创建一个Intent(隐式),必须在AndroidManifest.xml加入权限配置
     Intent intent=new Intent(Intent.ACTION_CALL);
     //携带数据
     String number =edit_main_number.getText().toString();
     intent.setData(Uri.parse("tel:"+number));
     //启动Activity
     startActivity(intent);
    }else if(v==btn_send){
      //得到SmsManager的对象
      SmsManager smsManager=SmsManager.getDefault();
      //发送文本信息(短信)
      String number=edit_main_number.getText().toString();
      String cOntent=edit_main_content.getText().toString();
      smsManager.sendTextMessage(number, null, content, null, null);
    }
    return true;
  }
}