Java 如何从 arrays.xml 文件中获取字符串数组
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How to get String Array from arrays.xml file
提问by Soren
I am just trying to display a list from an array that I have in my arrays.xml. When I try to run it in the emulator, I get a force close message.
我只是想从我的arrays.xml. 当我尝试在模拟器中运行它时，我收到一条强制关闭消息。
If I define the array in the java file
如果我在java文件中定义数组
String[] testArray = new String[] {"one","two","three","etc"};
it works, but when I use
它有效，但是当我使用
String[] testArray = getResources().getStringArray(R.array.testArray);
it doesnt work.
它不起作用。
Here is my Java file:
这是我的 Java 文件：
package com.xtensivearts.episode.seven;
import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
public class Episode7 extends ListActivity {
String[] testArray = getResources().getStringArray(R.array.testArray);
/** Called when the activity is first created. */
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Create an ArrayAdapter that will contain all list items
ArrayAdapter<String> adapter;
/* Assign the name array to that adapter and
also choose a simple layout for the list items */
adapter = new ArrayAdapter<String>(
this,
android.R.layout.simple_list_item_1,
testArray);
// Assign the adapter to this ListActivity
setListAdapter(adapter);
}
}
Here is my arrays.xmlfile
这是我的arrays.xml文件
<?xml version="1.0" encoding="utf-8"?>
<resources>
<array name="testArray">
<item>first</item>
<item>second</item>
<item>third</item>
<item>fourth</item>
<item>fifth</item>
</array>
</resources>
采纳答案by Dimitar Dimitrov
You can't initialize your testArrayfield this way, because the application resources still aren't ready.
您不能以testArray这种方式初始化您的字段，因为应用程序资源还没有准备好。
Just change the code to:
只需将代码更改为：
package com.xtensivearts.episode.seven;
import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
public class Episode7 extends ListActivity {
String[] mTestArray;
/** Called when the activity is first created. */
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Create an ArrayAdapter that will contain all list items
ArrayAdapter<String> adapter;
mTestArray = getResources().getStringArray(R.array.testArray);
/* Assign the name array to that adapter and
also choose a simple layout for the list items */
adapter = new ArrayAdapter<String>(
this,
android.R.layout.simple_list_item_1,
mTestArray);
// Assign the adapter to this ListActivity
setListAdapter(adapter);
}
}
回答by HaMMeReD
Your XML is not entirely clear, but arrays XML can cause force closes if you make them numbers, and/or put white space in their definition.
您的 XML 并不完全清楚，但是如果您将数组 XML 设为数字和/或在其定义中放置空格，则它们可能会导致强制关闭。
Make sure they are defined like No Leading or Trailing Whitespace
确保它们被定义为没有前导或尾随空格
回答by Muhammad Aamir Ali
Your array.xml is not right. change it to like this
您的 array.xml 不正确。改成这样
Here is array.xml file
这是 array.xml 文件
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="testArray">
<item>first</item>
<item>second</item>
<item>third</item>
<item>fourth</item>
<item>fifth</item>
</string-array>
</resources>
