1

在此处输入图像描述

此图像显示了我想要实现的布局，黑色方块是可绘制文件夹中的图像，红色方块是一个框架布局，其中 2 个图像相互叠加。问题是这样的： 在此处输入图像描述

红色方块（框架布局）没有出现。请参阅下面的代码...

 public class ImageAdapter extends BaseAdapter {
        private Context mContext;

    public ImageAdapter(Context c) {
        mContext = c;
    }

    public int getCount() {
        return mThumbIds.length;
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;
        if (convertView == null) {  // if it's not recycled, initialize some attributes
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);
        } else {
            imageView = (ImageView) convertView;
        }

        imageView.setImageResource(mThumbIds[position]);
        return imageView;
    }

    // references to our images
    private Integer[] mThumbIds = {
            R.drawable.sample_2, R.drawable.sample_3,
            R.drawable.sample_4, R.drawable.sample_5,
            R.drawable.sample_6, R.drawable.sample_7
    };
}

我从Android Developers那里得到了这个工作良好的代码，它在我的程序中工作得很好，问题是我想改变这一行中的一些项目：

private Integer[] mThumbIds = {
    R.drawable.sample_2, R.drawable.sample_3,
    R.drawable.sample_4, R.drawable.sample_5,
    R.drawable.sample_6, R.drawable.sample_7
};

R.drawable.sample_2我改成R.layout.some_layout

这是some_layout.xml：

<?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" >

    <FrameLayout
        android:id="@+id/frame"
        android:layout_width="wrap_content"
        android:layout_height="115dp"
        android:layout_margin="2dp"
        android:layout_weight="0.33" >

        <ImageView
            android:id="@+id/image"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="fitCenter"
            android:src="@drawable/imagebehind" />

        <Button
            android:id="@+id/button"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/frameimage" />
    </FrameLayout>

</LinearLayout>

出现以下行中的所有项目：

private Integer[] mThumbIds = {
  R.layout.some_layout, R.drawable.sample_3,
  R.drawable.sample_4, R.drawable.sample_5,
  R.drawable.sample_6, R.drawable.sample_7
};

除了R.layout.some_layout.

4

2 回答 2

2 
// try this
<?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" >

    <FrameLayout
        android:id="@+id/frame"
        android:layout_width="wrap_content"
        android:layout_height="115dp"
        android:layout_margin="2dp"
        android:layout_weight="0.33" >

        <ImageView
            android:id="@+id/image"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="fitCenter"
            android:src="@drawable/ic_launcher" />

        <Button
            android:id="@+id/button"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
    </FrameLayout>

</LinearLayout>

public class ImageAdapter extends BaseAdapter {
        private Context mContext;

        public ImageAdapter(Context c) {
            mContext = c;
        }

        public int getCount() {
            return mThumbIds.length;
        }

        public Object getItem(int position) {
            return null;
        }

        public long getItemId(int position) {
            return 0;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder;
            if (convertView == null) {
                convertView = LayoutInflater.from(mContext).inflate(R.layout.grid_item,null,false);
                holder = new ViewHolder();
                holder.image = (ImageView) convertView.findViewById(R.id.image);
                holder.button = (Button) convertView.findViewById(R.id.button);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder)convertView.getTag();
            }

            holder.image.setImageResource(mThumbIds[position]);
            return convertView;
        }

        private Integer[] mThumbIds = {
                R.layout.some_layout, R.drawable.sample_3,
                R.drawable.sample_4, R.drawable.sample_5,
                R.drawable.sample_6, R.drawable.sample_7
        };

        class ViewHolder {
            ImageView image;
            Button button;
        }
    }
于 2013-10-31T05:07:24.993 回答
1 
package com.example.sampleproject;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;

public class ImageAdapter extends BaseAdapter {
    private Context mContext;
    private LayoutInflater layoutInflater;

    public ImageAdapter(Context c) {
        mContext = c;
        layoutInflater = (LayoutInflater)c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public int getCount() {
        return mThumbIds.length;
    }

    public Object getItem(int position) {
        return mThumbIds[position];
    }

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

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup parent) {

        ImageView imageView;
        Button button;


        if (convertView == null) {  // if it's not recycled, initialize some attributes
            convertView = layoutInflater.inflate(R.layout.someLayout, null);
            imageView = (ImageView)convertView.findViewById(R.id.image);
            button = (Button)convertView.findViewById(R.id.button);

        } else {

        }
        button.setText("some text");
        imageView.setImageResource(mThumbIds[position]);
        return imageView;
    }

    // references to our images
    private Integer[] mThumbIds = {
            R.drawable.sample_2, R.drawable.sample_3,
            R.drawable.sample_4, R.drawable.sample_5,
            R.drawable.sample_6, R.drawable.sample_7
    };
}

朋友很容易膨胀布局：阅读教程基础适配器它将很有用

于 2013-10-31T04:17:01.887 回答