MainActivity如下:

package cn.test;
import android.os.Bundle;
import android.app.Activity;
/**
 * Demo描述:
 * 在资源文件Strings.xml中的某个string里使用占位符
 * 然后在代码中将其替换
 */
public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		init();
	}
    private void init(){
    	String stringStart=getResources().getString(R.string.stringStart);
    	String startResult=String.format(stringStart, "占位符的测试:");
    	System.out.println("startResult="+startResult);
    	
    	String stringTest=getResources().getString(R.string.stringTest);
    	String stringResult=String.format(stringTest, "周星驰","香港",55);
    	System.out.println("stringResult="+stringResult);
    	
    	String numberTest=getResources().getString(R.string.numberData);
    	String numberResult=String.format(numberTest,9527,88.88f);
    	System.out.println("numberResult="+numberResult);
    	
    }

}

Strings.xml如下:

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">TestStringResource</string>
    <string name="action_settings">Settings</string>
    <string name="hello_world">Hello world!</string>
    
    <string name="stringStart">现在开始%1$s</string>
    
    <string name="stringTest">My name is %1$s , I am from %2$s,I am %3$d years old</string>
    
    <!-- .3f表示的是保留三位小数的浮点数  -->
    <string name="numberData">我的编号是(整数型):%1$d , 我的工资是(浮点型)：%2$.3f</string>

</resources>

 

main.xml如下:

<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"
    >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:textSize="25sp"
        android:text="@string/hello_world"
     />

</RelativeLayout>