Android 以编程方式创建 ListView
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Create ListView programmatically
提问by ashraf
Hi I am new in Android. Could anyone tell me pls whats the wrong with the following code:
嗨，我是 Android 新手。谁能告诉我以下代码有什么问题：
public class ListApp extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView lText = new TextView(this);
lText.setId(0);
ListView lView = new ListView(this);
String[] lStr = new String[]{"AA","BB", "CC"};
ArrayAdapter lAdap = new ArrayAdapter(this,lText.getId(),lStr);
lView.setAdapter(lAdap);
lView.setFocusableInTouchMode(true);
setContentView(lView);
}
}
回答by moonlightcheese
here's a solution that does not require you to write any xml layouts. it uses standard android layouts where possible and no inflation is necessary:
这是一个不需要您编写任何 xml 布局的解决方案。它在可能的情况下使用标准的 android 布局，并且不需要膨胀：
Dialog dialog = new Dialog(this);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select Color Mode");
ListView modeList = new ListView(this);
String[] stringArray = new String[] { "Bright Mode", "Normal Mode" };
ArrayAdapter<String> modeAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, stringArray);
modeList.setAdapter(modeAdapter);
builder.setView(modeList);
dialog = builder.create();
回答by Krishna
Try this..
尝试这个..
Paste the following code in list_item.xml.
将以下代码粘贴到 list_item.xml 中。
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:textSize="16sp" android:textColor="#ffffff" android:textStyle="bold" android:background="@drawable/border_cell">
</TextView>
Here is the activity class....
这里是活动课......
public class UsersListActivity extends ListActivity{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String[] statesList = {"listItem 1", "listItem 2", "listItem 3"};
setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item,
statesList));
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(getApplicationContext(),
"You selected : "+((TextView) view).getText(), Toast.LENGTH_SHORT).show();
}
});
}
}
回答by kzotin
Best practice is to separate view (xml layout) and controller (Activity).
最佳做法是将视图（xml 布局）和控制器（活动）分开。
If you dont want this, try to put
如果你不想要这个，试着把
setContentView(lView);
at the beginning of onCreate
在onCreate的开头
回答by Kevin Bradshaw
public class ListApp extends ListActivity
回答by Nathan Schwermann
Make a layout XML file with your listview and use findViewById to set it's adapter after first setting the content view to your layout
使用您的列表视图制作一个布局 XML 文件，并在首先将内容视图设置为您的布局后使用 findViewById 设置它的适配器
