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>
