当我在标题中写道时,我需要一些帮助来获取字符串数组中的项目并在文本视图中逐一显示我有代码将它们全部放在列表视图中但我需要在文本视图中逐个显示它们时间随机在这里我的代码和抱歉我的英语不好 ,无论如何,谢谢你的帮助......
public class MainActivity 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.planets_array);
/* 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);
}
}
XML文件:
<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"
tools:context=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="@array/planets_array"
/>
</RelativeLayout>
和字符串数组文件:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="planets_array">
<item>Mercury</item>
<item>Venus</item>
<item>Earth</item>
<item>Mars</item>
</string-array>
</resources>
答案 0 :(得分:19)
好的,通过评论,我了解了您的需求并编辑了我的答案。您希望随机在textView中显示数组的值。
使用此活动:
public class MainActivity extends Activity {
String[] mTestArray;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sample);
mTestArray = getResources().getStringArray(R.array.planets_array);
}
@Override
protected void onResume() {
super.onResume();
updateTextView();
}
private void updateTextView() {
TextView textView = (TextView)findViewById(R.id.randomTextView);
Random random = new Random();
int maxIndex = mTestArray.length;
int generatedIndex = random.nextInt(maxIndex);
textView.setText(mTestArray[generatedIndex]);
}
}
将此布局放在res / layout文件夹下,并将其命名为sample.xml。
<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"
tools:context=".MainActivity" >
<TextView
android:id="@+id/randomTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"/>
</RelativeLayout>