layout中listview占据了整个界面，其余控件全部隐藏，xml文件怎么改都没用

Question

layout中listview占据了整个界面，其余控件全部隐藏，xml文件怎么改都没用，只要listview有数据，就看不到添加的BUTTON或者EXITVIEW了。

布局文件：

<?xml version="1.0" encoding="utf-8"?>

xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>

<Button
    android:id="@+id/btshanchu"
    android:layout_width="fill_parent"  
    android:layout_height="wrap_content"
    android:text="删除" 
   />


<ListView  
    android:id="@+id/Lziliao"  
    android:layout_width="wrap_content"  
    android:layout_height="wrap_content"  
    android:layout_below="@id/btshanchu"/>

java文件：

package com.example.huclass;

import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;

public class GuanliActivity extends Activity {

 private ListView listView; 
              @Override  
    public void onCreate(Bundle savedInstanceState){  
        super.onCreate(savedInstanceState);  

        listView = new ListView(this);         
        //android.R.layout.simple_list_item_1是系统定义好的布局文件只显示一行文字  
        listView.setAdapter((ListAdapter) new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1,getData()));  
        setContentView(listView);  

        listView.setAdapter(new ArrayAdapter<String>(this,  
                android.R.layout.simple_list_item_multiple_choice, getData()));  

        listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);}

private List getData(){

        List<String> data = new ArrayList<String>();  
        data.add("【计算机网络】数据链路层");  
        data.add("【计算机网络】应用层");  
        data.add("【信息论】香农定理");  
        data.add("【概率论】总结");  

        return data;  
    }  

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.guanli, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

}

Answer 1

setContentView(listView);

里面那个listview改成你xml的名字 R.layout.XXX

Answer 2

用RelativeLayout布局 你是想把button放在什么位置就都可以显示了

Answer 3

setContentView(listView);你都这样写了，肯定只有listview了，另外怎么两个listView.setAdapter？？？？？

Answer 4

public class ZhuyeActivity extends ListActivity {

//通过一个list去映射数据显示在listview中

private List> mData;

@Override  
public void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);  
    mData = getData();  
    MyAdapter adapter = new MyAdapter(this);  
    setListAdapter(adapter); 
}  

private List<Map<String, Object>> getData() {  
    List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();  

    Map<String, Object> map = new HashMap<String, Object>();  
    map.put("title", "1");  
    map.put("info", " 1 ");  
    map.put("img", R.drawable.ic_launcher);  
    list.add(map);  

    map = new HashMap<String, Object>();  
    map.put("title", "2");  
    map.put("info", " 2 ");  
    map.put("img", R.drawable.ic_launcher);  
    list.add(map);  

    map = new HashMap<String, Object>();  
    map.put("title", "3");  
    map.put("info", " 3 ");  
    map.put("img", R.drawable.ic_launcher);  
    list.add(map);  

    return list;  
}  

// ListView 中某项被选中后的逻辑  
@Override  
protected void onListItemClick(ListView l, View v, int position, long id) {  

    Log.v("MyListView4-click", (String) mData.get(position).get("title"));  
}  

/** 
 * listview中点击按键弹出对话框 

public void showInfo() {  
    new AlertDialog.Builder(this).setTitle("Btn listview")  
            .setMessage("123")  
            .setPositiveButton("确定", new DialogInterface.OnClickListener() {  
                public void onClick(DialogInterface dialog, int which) {  
                }  
            }).show();  

}  */ 

public final class ViewHolder {  
    public ImageView img;  
    public TextView title;  
    public TextView info;  
    public Button viewBtn;  
}  

public class MyAdapter extends BaseAdapter {  

    private LayoutInflater mInflater;  

    public MyAdapter(Context context) {  
        this.mInflater = LayoutInflater.from(context);  
    }  

    public int getCount() {  
        // TODO Auto-generated method stub  
        return mData.size();  
    }  

    public Object getItem(int arg0) {  
        // TODO Auto-generated method stub  
        return null;  
    }  

    public long getItemId(int arg0) {  
        // TODO Auto-generated method stub  
        return 0;  
    }  

    public View getView(int position, View convertView, ViewGroup parent) {  

        ViewHolder holder = null;  
        if (convertView == null) {  

            holder = new ViewHolder();  

            convertView = mInflater.inflate(R.layout.list, null);  
            holder.img = (ImageView) convertView.findViewById(R.id.img);  
            holder.title = (TextView) convertView.findViewById(R.id.title);  
            holder.info = (TextView) convertView.findViewById(R.id.info);  
            holder.viewBtn = (Button) convertView  
                    .findViewById(R.id.view_btn);  
            convertView.setTag(holder);  

        } else {  

            holder = (ViewHolder) convertView.getTag();  
        }  

        holder.img.setBackgroundResource((Integer) mData.get(position).get(  
                "img"));  
        holder.title.setText((String) mData.get(position).get("title"));  
        holder.info.setText((String) mData.get(position).get("info"));  

        holder.viewBtn.setOnClickListener(new View.OnClickListener() {  

            public void onClick(View v) {  
                 Intent intent = new Intent();
                 intent.setClass(ZhuyeActivity.this, KechengActivity.class);
                 ZhuyeActivity.this.startActivity(intent);  
            }  
        });  

        return convertView;  
    }  

}  public class ZhuyeActivity extends ListActivity {  
//通过一个list去映射数据显示在listview中  
private List<Map<String, Object>> mData;  

@Override  
public void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);  
    mData = getData();  
    MyAdapter adapter = new MyAdapter(this);  
    setListAdapter(adapter); 
}  

private List<Map<String, Object>> getData() {  
    List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();  

    Map<String, Object> map = new HashMap<String, Object>();  
    map.put("title", "1");  
    map.put("info", " 1 ");  
    map.put("img", R.drawable.ic_launcher);  
    list.add(map);  

    map = new HashMap<String, Object>();  
    map.put("title", "2");  
    map.put("info", " 2 ");  
    map.put("img", R.drawable.ic_launcher);  
    list.add(map);  

    map = new HashMap<String, Object>();  
    map.put("title", "3");  
    map.put("info", " 3 ");  
    map.put("img", R.drawable.ic_launcher);  
    list.add(map);  

    return list;  
}  

// ListView 中某项被选中后的逻辑  
@Override  
protected void onListItemClick(ListView l, View v, int position, long id) {  

    Log.v("MyListView4-click", (String) mData.get(position).get("title"));  
}  

/** 
 * listview中点击按键弹出对话框 

public void showInfo() {  
    new AlertDialog.Builder(this).setTitle("Btn listview")  
            .setMessage("123")  
            .setPositiveButton("确定", new DialogInterface.OnClickListener() {  
                public void onClick(DialogInterface dialog, int which) {  
                }  
            }).show();  

}  */ 

public final class ViewHolder {  
    public ImageView img;  
    public TextView title;  
    public TextView info;  
    public Button viewBtn;  
}  

public class MyAdapter extends BaseAdapter {  

    private LayoutInflater mInflater;  

    public MyAdapter(Context context) {  
        this.mInflater = LayoutInflater.from(context);  
    }  

    public int getCount() {  
        // TODO Auto-generated method stub  
        return mData.size();  
    }  

    public Object getItem(int arg0) {  
        // TODO Auto-generated method stub  
        return null;  
    }  

    public long getItemId(int arg0) {  
        // TODO Auto-generated method stub  
        return 0;  
    }  

    public View getView(int position, View convertView, ViewGroup parent) {  

        ViewHolder holder = null;  
        if (convertView == null) {  

            holder = new ViewHolder();  

            convertView = mInflater.inflate(R.layout.list, null);  
            holder.img = (ImageView) convertView.findViewById(R.id.img);  
            holder.title = (TextView) convertView.findViewById(R.id.title);  
            holder.info = (TextView) convertView.findViewById(R.id.info);  
            holder.viewBtn = (Button) convertView  
                    .findViewById(R.id.view_btn);  
            convertView.setTag(holder);  

        } else {  

            holder = (ViewHolder) convertView.getTag();  
        }  

        holder.img.setBackgroundResource((Integer) mData.get(position).get(  
                "img"));  
        holder.title.setText((String) mData.get(position).get("title"));  
        holder.info.setText((String) mData.get(position).get("info"));  

        holder.viewBtn.setOnClickListener(new View.OnClickListener() {  

            public void onClick(View v) {  
                 Intent intent = new Intent();
                 intent.setClass(ZhuyeActivity.this, KechengActivity.class);
                 ZhuyeActivity.this.startActivity(intent);  
            }  
        });  

        return convertView;  
    }  

}  

Answer 5

根布局不要用LinearLayout

Answer 6

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.xxxx)
mData = getData();

MyAdapter adapter = new MyAdapter(this);

setListAdapter(adapter);
}