Android 使用我创建的列表视图。安卓

我正在尝试使用列表视图，我已经成功创建了一个列表视图，它工作得非常好。然而，它在一个新的屏幕上创造了自己。我想知道如何在主菜单中使用已经创建的列表视图（由main.xml定义）

我的Java代码：

public class Option2Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Intent startNewActivityOpen = new Intent(Option2Activity.this, ListViewActivity.class);
        startActivityForResult(startNewActivityOpen, 0);
    }
}


public class ListViewActivity extends ListActivity
{
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);

        ListView lv = (ListView)findViewById(R.id.listview_main);
        // Currently unused... 

        Context ctx = getApplicationContext();
        Resources res = ctx.getResources();

        String[] options = res.getStringArray(R.array.list_titles);
        TypedArray icons = res.obtainTypedArray(R.array.list_icons);

        setListAdapter(new Adapter(ctx, R.layout.list_item, options, icons));
        //I tried using lv.setAdapter(new Adapter(ctx, R.layout.list_item, options, icons));
        //but it didn't work. 'setListAdapter' is creating a new listview in another screen

    }
}

public class Adapter extends ArrayAdapter<String> {

    private LayoutInflater mInflater;
    private String[] mStrings;
    private TypedArray mIcons;

    private int mViewResourceId;

    public Adapter(Context ctx, int viewResourceId, String[] strings, TypedArray icons) 
    {   
        super(ctx, viewResourceId, strings);

        mInflater = (LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        mStrings = strings;
        mIcons = icons;
        mViewResourceId = viewResourceId;
    }

    @Override
    public int getCount() 
    {
        return mStrings.length;
    }

    @Override
    public String getItem(int position) 
    {
        return mStrings[position];
    }

    @Override
    public long getItemId(int position) 
    {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) 
    {
        convertView = mInflater.inflate(mViewResourceId, null);

        Button ib = (Button)convertView.findViewById(R.id.list_button);
        ib.setText(mStrings[position]);
        ib.setCompoundDrawables((mIcons.getDrawable(position)), null, null, null);
            //this doesn't work either, it is supposed to set an image in the button
            //if anyone knows how to help me I'd appreciate but it isn't the main issue

        TextView tv = (TextView)convertView.findViewById(R.id.list_text);
        tv.setText(mStrings[position]);

        return convertView;
    }
}

与最新用户的回复不完全相同。但它奏效了。不需要ListViewActivity

---

谢谢论坛。

删除

ListViewActivity

活动只需使用我下面给出的活动

public class Option2Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

       ListView lv = (ListView)findViewById(R.id.listview_main);
        // Currently unused... 

        Context ctx = getApplicationContext();
        Resources res = ctx.getResources();

        String[] options = res.getStringArray(R.array.list_titles);
        TypedArray icons = res.obtainTypedArray(R.array.list_icons);

        lv.setListAdapter(new Adapter(ctx, R.layout.list_item, options, icons));

    }

    public class Adapter extends ArrayAdapter<String> {

    private LayoutInflater mInflater;
    private String[] mStrings;
    private TypedArray mIcons;

    private int mViewResourceId;

    public Adapter(Context ctx, int viewResourceId, String[] strings, TypedArray icons) 
    {   
        super(ctx, viewResourceId, strings);

        mInflater = (LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        mStrings = strings;
        mIcons = icons;
        mViewResourceId = viewResourceId;
    }

    @Override
    public int getCount() 
    {
        return mStrings.length;
    }

    @Override
    public String getItem(int position) 
    {
        return mStrings[position];
    }

    @Override
    public long getItemId(int position) 
    {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) 
    {
        convertView = mInflater.inflate(mViewResourceId, null);

        Button ib = (Button)convertView.findViewById(R.id.list_button);
        ib.setText(mStrings[position]);
        ib.setCompoundDrawables((mIcons.getDrawable(position)), null, null, null);
            //this doesn't work either, it is supposed to set an image in the button
            //if anyone knows how to help me I'd appreciate but it isn't the main issue

        TextView tv = (TextView)convertView.findViewById(R.id.list_text);
        tv.setText(mStrings[position]);

        return convertView;
    }

}

公共类选项2活动扩展活动{
/**在首次创建活动时调用*/
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.main）；
ListView lv=（ListView）findViewById（R.id.ListView\u main）；
//当前未使用的。。。
Context ctx=getApplicationContext（）；
Resources res=ctx.getResources（）；
String[]options=res.getStringArray（R.array.list_titles）；
TypedArray图标=res.obtainTypedArray（R.array.list_图标）；
lv.setListAdapter（新适配器（ctx、R.layout.list_项、选项、图标））；
}
公共类适配器扩展了ArrayAdapter{
私人停车场；
私有字符串[]mStrings；
私有型Darray mIcons；
私有int-mViewResourceId；
公共适配器（上下文ctx、int-viewResourceId、字符串[]字符串、类型Darray图标）
{   
超级（ctx、viewResourceId、字符串）；
mInflater=（LayoutInflater）ctx.getSystemService（Context.LAYOUT\u INFLATER\u SERVICE）；
mStrings=字符串；
mIcons=图标；
mViewResourceId=viewsourceid；
}
@凌驾
public int getCount（）
{
返回mStrings.length；
}
@凌驾
公共字符串getItem（int位置）
{
返回mStrings[位置]；
}
@凌驾
公共长getItemId（int位置）
{
返回位置；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）
{
convertView=mInflater.inflate（mViewResourceId，null）；
按钮ib=（按钮）convertView.findViewById（R.id.list_按钮）；
ib.setText（mStrings[位置]）；
ib.setCompoundDrawables（（mIcons.getDrawable（position）），null，null，null）；
//这也不行，应该在按钮中设置一个图像
//如果有人知道如何帮助我，我会很感激，但这不是主要问题
TextView tv=（TextView）convertView.findViewById（R.id.list\u text）；
tv.setText（mStrings[position]）；
返回视图；
}
}

---

试试这个，

Option2Activity活动的用途是什么？第一个活动（主要活动）。与应用程序开始时一样。无需使用ListViewActivity活动。您可以在主活动中使用listview本身。使用我提供的代码。并让我知道发生了什么情况。工作正常，只需使用lv.setAdapter即可。谢谢。如果此答案对您有帮助，您可以通过单击下面的右符号接受正确答案在答案的左边，这将有助于你和其他用户也。。

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView 
    android:id="@+id/list_text"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" 
    android:textSize="24dp"
    android:padding="6dp" 
    />

    <Button
        android:id="@+id/list_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
    />


</LinearLayout>

public class Option2Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        ListView lv = (ListView)findViewById(R.id.listview_main);


        Context ctx = getApplicationContext();
        Resources res = ctx.getResources();

        String[] options = res.getStringArray(R.array.list_titles);
        TypedArray icons = res.obtainTypedArray(R.array.list_icons);

        lv.setAdapter(new Adapter(ctx, R.layout.list_item, options, icons));

    }
}

public class Option2Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

       ListView lv = (ListView)findViewById(R.id.listview_main);
        // Currently unused... 

        Context ctx = getApplicationContext();
        Resources res = ctx.getResources();

        String[] options = res.getStringArray(R.array.list_titles);
        TypedArray icons = res.obtainTypedArray(R.array.list_icons);

        lv.setListAdapter(new Adapter(ctx, R.layout.list_item, options, icons));

    }

    public class Adapter extends ArrayAdapter<String> {

    private LayoutInflater mInflater;
    private String[] mStrings;
    private TypedArray mIcons;

    private int mViewResourceId;

    public Adapter(Context ctx, int viewResourceId, String[] strings, TypedArray icons) 
    {   
        super(ctx, viewResourceId, strings);

        mInflater = (LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        mStrings = strings;
        mIcons = icons;
        mViewResourceId = viewResourceId;
    }

    @Override
    public int getCount() 
    {
        return mStrings.length;
    }

    @Override
    public String getItem(int position) 
    {
        return mStrings[position];
    }

    @Override
    public long getItemId(int position) 
    {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) 
    {
        convertView = mInflater.inflate(mViewResourceId, null);

        Button ib = (Button)convertView.findViewById(R.id.list_button);
        ib.setText(mStrings[position]);
        ib.setCompoundDrawables((mIcons.getDrawable(position)), null, null, null);
            //this doesn't work either, it is supposed to set an image in the button
            //if anyone knows how to help me I'd appreciate but it isn't the main issue

        TextView tv = (TextView)convertView.findViewById(R.id.list_text);
        tv.setText(mStrings[position]);

        return convertView;
    }

}