Android中Strings.xml使用占位符示例

package cn.test;
import android.os.Bundle;
import android.app.Activity;
/**
 * Demo描述:
 * 在資源文件Strings.xml中的某個string裡使用占位符
 * 然後在代碼中將其替換
 */
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, "占位符的測試:");
     System.out.println("startResult="+startResult);
     
     String stringTest=getResources().getString(R.string.stringTest);
     String stringResult=String.format(stringTest, "周星馳","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);
     
    }

}

<?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">現在開始%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數的浮點數  -->
    <string name="numberData">我的編號是(整數型):%1$d , 我的工資是(浮點型)：%2$.3f</string>

</resources>

<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>