获得资源的id的另一种方法

int layoutRes = getResources().getIdentifier("pager_view" + i, "layout", getPackageName());

假设我们想在这个相对布局中填一个子节点

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/rl"

    android:layout_width="match_parent"

    android:layout_height="match_parent" >

</RelativeLayout>

package com.example.com.fmyh;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.FileReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStream;

import javax.xml.parsers.SAXParser;

import javax.xml.parsers.SAXParserFactory;

import org.w3c.dom.Text;

import org.xml.sax.Attributes;

import org.xml.sax.InputSource;

import org.xml.sax.SAXException;

import org.xml.sax.XMLReader;

import org.xml.sax.helpers.DefaultHandler;

import org.xml.sax.helpers.XMLReaderFactory;

import org.xmlpull.v1.XmlPullParserException;

import android.app.Activity;

import android.content.Intent;

import android.content.res.XmlResourceParser;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.RelativeLayout;

import android.widget.RelativeLayout.LayoutParams;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        RelativeLayout rl=(RelativeLayout) findViewById(R.id.rl);

        TextView tv = new TextView(this);

        tv.setText("你好");

        //设置长宽高 这里要选父节点RelativeLayout的包

        LayoutParams lf = new LayoutParams(20,20);

        //设置左右上下的margin值

        lf.setMargins(10, 10, 10, 10);

        tv.setLayoutParams(lf);

        rl.addView(tv);

    }

}