Question

我需要在android gridview中将图像设置为背景。我有使用图像视图加载图像的代码。以下代码是我的代码，请帮我解决这个问题。

public void onCreate(Bundle savedInstanceState) {

    if(!isNetworkAvailbale()){
        Toast.makeText(getApplicationContext(), "Internet Connection not available", Toast.LENGTH_SHORT).show();
        finish();
    }

    super.onCreate(savedInstanceState);
    setContentView(R.layout.gridview);

    GridView gridview = (GridView) findViewById(R.id.gridview);
    gridview.setAdapter(new ImageAdapter(this));

    gridview.setOnItemClickListener(new OnItemClickListener() {

        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
            Log.d("taust","sds");
            Toast.makeText(NuesHoundRSSActivity.this, "Item co" + position, Toast.LENGTH_SHORT).show();
        }
    });

}

ImageAdapter

package com.nues.rss;

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

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(150, 150));
        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageView.setPadding(1, 1, 1, 1);
    } else {
        imageView = (ImageView) convertView;
    }

    imageView.setImageResource(mThumbIds[position]);
   // imageView.setTag(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,
        R.drawable.sample_0, R.drawable.sample_1,
        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_0, R.drawable.sample_1,
        R.drawable.sample_2, R.drawable.sample_3,
        R.drawable.sample_4, R.drawable.sample_5,
        R.drawable.sample_6, R.drawable.sample_7
};


}

任何团体都知道如何将图像设置为网格项的背景？

Answer 1

是的，是的，我明白了。您希望显示一个自定义GridView，其背景设置为每个网格元素，并在其上面有一些内容。

第一步是创建一个布局并在自定义适配器的getView方法中对其进行膨胀。

这是一个例子，

http://www.technotalkative.com/android-gridview-example/

http://android-vogue.blogspot.in/2011/06/custom-gridview-in-android-with.html。

Answer 2

好的，如果你想为GridView设置一个背景图像（我的意思是整个View的背景），你只需要在Activity类中设置它：

GridView gridview = (GridView)findViewById(R.id.gridview);
gridview.setBackgroundResource(R.drawable.sampleImage);

或者在XML布局文件中：

android:background="@drawable/sampleImage"

相反，如果您要为GridView的所有项目/元素设置背景图像（所有项目的图像都相同），您只需在ImageAdapter中执行此操作：

private Integer mThumbIds = R.drawable.sampleImage;
...
imageView.setImageResource(mThumbIds);

请注意，在适配器内部，您甚至可以使用TextView而不是ImageView，这样您就可以同时拥有图像和文本：

public View getView(int position, View view, ViewGroup parent) {
    TextView newView;
    if ( view == null ) {
        newView = new TextView( this.mContext );
    } else {
        newView = (TextView) view;
    }

    //Set the text:
    newView.setText( "TEXT" );  // android:text
    newView.setTextColor( Color.WHITE );  // android:textColor
    newView.setTextSize(25);  // android:textSize
    newView.setTypeface( Typeface.DEFAULT_BOLD );  // android:textStyle
    newView.setGravity( Gravity.CENTER );  // android:gravity

    //Set backgorund image:
    newView.setBackgroundResource( this.thumbIds );  // android:background
    newView.setWidth(64);
    newView.setHeight(64);

    return newView;
}

如何将背景设置为Android Gridview？

2 个答案: