android dev:列表视图中的项目无法正确获得焦点

发布于 2024-12-06 18:26:52 字数 3511 浏览 0 评论 0原文

我面临列表视图焦点问题。 列表视图上方有一个按钮(不是列表视图标题)。我将 listview.setItemsCanFocus 设置为 true。当我使用轨迹球滚动时,列表视图中的项目无法正确聚焦。我发布了布局文件和代码,希望这有帮助。

package com.gaocx.trackballtest;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup.LayoutParams;    
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class MainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    ListView listView = (ListView) findViewById(R.id.listviewId);
    Button headerBtn = new Button(this);
    headerBtn.setWidth(LayoutParams.FILL_PARENT);
    headerBtn.setHeight(LayoutParams.WRAP_CONTENT);
    headerBtn.setText("ListView Header");
    listView.addHeaderView(headerBtn);
    findViewById(R.id.layoutid1).setFocusable(true);

    Button button1 = (Button)findViewById(R.id.button1);
    button1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(MainActivity.this, "Button1", 2000).show();
        }
    });
    Button button2 = (Button)findViewById(R.id.button2);
    button2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(MainActivity.this, "Button2", 2000).show();
        }
    });

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);
    for (int i = 0; i < 20; ++i) {
        adapter.add("value" + i);
    }
    listView.setAdapter(adapter);
    listView.setItemsCanFocus(true);
    listView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            Toast.makeText(MainActivity.this, "Value" + arg2, 2000).show();
        }
    });
}
}

布局文件:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" 
    android:id="@+id/layoutid1">
    <TextView  
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_gravity="left"
        android:text="@string/hello"
        /> 
    <Button  
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_gravity="right"
        android:text="@string/hello"
        android:id="@+id/button1"
        />
    <Button  
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_gravity="right"
        android:text="@string/hello"
        android:id="@+id/button2"
        />
</LinearLayout>
<ListView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/listviewId"/>
</LinearLayout>

我认为这是一个列表视图错误并将其发布在android报告错误页面上。但我被拒绝了,Android 团队要求我在这里发帖寻求帮助。所以任何帮助将不胜感激。 多谢。

I face a listview focus problem.
There is a button above the listview(not listview header). And I set listview.setItemsCanFocus to true. When I scroll using trackball, the items in listview can not get focused correctly. I post the layout file and code, hope this helps.

package com.gaocx.trackballtest;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup.LayoutParams;    
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class MainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    ListView listView = (ListView) findViewById(R.id.listviewId);
    Button headerBtn = new Button(this);
    headerBtn.setWidth(LayoutParams.FILL_PARENT);
    headerBtn.setHeight(LayoutParams.WRAP_CONTENT);
    headerBtn.setText("ListView Header");
    listView.addHeaderView(headerBtn);
    findViewById(R.id.layoutid1).setFocusable(true);

    Button button1 = (Button)findViewById(R.id.button1);
    button1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(MainActivity.this, "Button1", 2000).show();
        }
    });
    Button button2 = (Button)findViewById(R.id.button2);
    button2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(MainActivity.this, "Button2", 2000).show();
        }
    });

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);
    for (int i = 0; i < 20; ++i) {
        adapter.add("value" + i);
    }
    listView.setAdapter(adapter);
    listView.setItemsCanFocus(true);
    listView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            Toast.makeText(MainActivity.this, "Value" + arg2, 2000).show();
        }
    });
}
}

The layout file:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" 
    android:id="@+id/layoutid1">
    <TextView  
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_gravity="left"
        android:text="@string/hello"
        /> 
    <Button  
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_gravity="right"
        android:text="@string/hello"
        android:id="@+id/button1"
        />
    <Button  
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_gravity="right"
        android:text="@string/hello"
        android:id="@+id/button2"
        />
</LinearLayout>
<ListView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/listviewId"/>
</LinearLayout>

I think this is a listview bug and post it on android report bug page. But I am rejected, and the android team ask me to post here for help.. So any help would be appreciated.
thanks a lot.

如果你对这篇内容有疑问,欢迎到本站社区发帖提问 参与讨论,获取更多帮助,或者扫码二维码加入 Web 技术交流群。

扫码二维码加入Web技术交流群

发布评论

需要 登录 才能够评论, 你可以免费 注册 一个本站的账号。

评论(1

橙味迷妹 2024-12-13 18:26:52

使按钮和 listView 都可点击,您需要为每个按钮添加下一个属性:

android:focusable="false"

仅此而已:)

make buttons and listView both clickable you need add for each Button next attribute:

android:focusable="false"

Thats all :)

~没有更多了~
我们使用 Cookies 和其他技术来定制您的体验包括您的登录状态等。通过阅读我们的 隐私政策 了解更多相关信息。 单击 接受 或继续使用网站,即表示您同意使用 Cookies 和您的相关数据。
原文