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Android字符串中使用占位符

2024-07-08 18:15:51   224人阅读

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 }


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