Android字符串中使用占位符

一是可以通过Java的 String.format(String format, Object... args) 方法来实现

二则是通过Android自带的 getResources().getString(int id, Object... formatArgs） 实现

占位符的语法可以参考Java文档

简单演示下第二种方法

strings.xml

1 <string name="boolean_conversion">Boolean: %1$b\n</string>
2 <string name="string_conversion">String: %1$s\n</string>
3 <string name="integer_conversion">Integer: %1$d\n</string>
4 <string name="float_conversion">Float: %1$.2f\n</string>
5 <string name="date_or_time_conversion">Year: %1$tY, Month: %1$tM, Day:%1$td</string>

MainActivity.java

 1 public class MainActivity extends ActionBarActivity {
 2
 3     @Override
 4         protected void onCreate(Bundle savedInstanceState) {
 5         super.onCreate(savedInstanceState);
 6             setContentView(R.layout.ac_main);
 7
 8             TextView text = (TextView) findViewById(R.id.ac_main_text);
 9             StringBuilder builder = new StringBuilder();
10             builder.append(
11                     getResources().getString(R.string.boolean_conversion, true));
12
13             builder.append(
14                     getResources().getString(R.string.string_conversion, "hello world"));
15
16             builder.append(
17                     getResources().getString(R.string.integer_conversion, 1234));
18
19             builder.append(
20                     getResources().getString(R.string.float_conversion, 1234.5678));
21
22             Calendar calendar = Calendar.getInstance();
23             builder.append(
24                     getResources().getString(R.string.date_or_time_conversion, calendar));
25
26             text.setText(builder.toString());
27     }
28 }

Android字符串中使用占位符