如何在 Android 的 ListView 中创建可聚焦的 editText?
androidapps/applicationsmobile development更新于 2026/2/16 11:52:17
此示例演示了如何在 Android 的 ListView 中创建可聚焦的 editText。
步骤 1 − 在 Android Studio 中创建一个新项目，前往"文件"->"新建项目"，并填写所有必需的信息以创建新项目。
步骤 2 − 将以下代码添加到 res/layout/activity_main.xml。
<?xml version="1.0" encoding="utf-8"?> <LinearLayout 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" android:orientation="vertical" android:padding="4dp" tools:context=".MainActivity"> <ListView android:id="@+id/listView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:descendantFocusability="beforeDescendants"> </ListView> </LinearLayout>
步骤 3 − 新建一个布局资源文件，并添加以下代码 −
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <EditText android:id="@+id/ItemCaption" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginStart="2dip" android:singleLine="true"> </EditText> </LinearLayout>
步骤 4 − 将以下代码添加到 src/MainActivity.java
import androidx.appcompat.app.AppCompatActivity;
import android.annotation.SuppressLint;
import android.app.LauncherActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ListView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
ListView listView;
MyAdapter myAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = findViewById(R.id.listView);
listView.setItemsCanFocus(true);
myAdapter = new MyAdapter();
listView.setAdapter(myAdapter);
}
private class MyAdapter extends BaseAdapter {
private LayoutInflater layoutInflater;
ArrayList<LauncherActivity.ListItem> myItems = new ArrayList<>();
MyAdapter() {
layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
for (int i = 0; i < 7; i++) {
LauncherActivity.ListItem listItem = new LauncherActivity.ListItem();
listItem.className = "Caption" + i;
myItems.add(listItem);
}
notifyDataSetChanged();
}
@Override
public int getCount() {
return myItems.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@SuppressLint("InflateParams")
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = layoutInflater.inflate(R.layout.listitem, null);
holder.caption = convertView.findViewById(R.id.ItemCaption);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.caption.setText(myItems.get(position).className);
holder.caption.setId(position);
holder.caption.setOnFocusChangeListener(new View.OnFocusChangeListener() {
public void onFocusChange(View v, boolean hasFocus) {
if (!hasFocus) {
final int position = v.getId();
final EditText Caption = (EditText) v;
myItems.get(position).className = Caption.getText().toString();
}
}
});
return convertView;
}
}
class ViewHolder {
EditText caption;
}
}
步骤 5 − 将以下代码添加到 AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity" android:windowSoftInputMode="adjustPan"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
让我们尝试运行您的应用程序。假设您已将实际的 Android 移动设备连接到电脑。要从 Android Studio 运行该应用程序，请打开项目的某个活动文件，然后点击工具栏上的"运行"
图标。选择您的移动设备作为选项，然后勾选将显示默认屏幕的移动设备。
