为GridView添加边框效果，供大家参考，具体内容如下
1.自定义GridView的item样式：
grid_item.xml文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<ImageView
android:id="@+id/item_image"
android:layout_width="115dp"
android:layout_height="115dp"
android:padding="8dp"
android:background="@drawable/grid_selector"
/>
</LinearLayout>
2.设置GridView item的背景：
grid_selector.xml文件
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_window_focused="false"
android:drawable="@drawable/grid_normal" />
<item android:state_selected="true"
android:drawable="@drawable/grid_pressed" />
<item android:state_pressed="true"
android:drawable="@drawable/grid_pressed" />
</selector>
3.设置GridView的listSelector为透明：
android:listSelector="@android:color/transparent"
4.自定义GridView的adapter：
import java.util.ArrayList;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
public class GridAdapter extends BaseAdapter {
private Context mContext = null;
private LayoutInflater inflater = null;
private ArrayList<Drawable> drawableList = null;
public GridAdapter(Context c) {
this.mContext = c;
this.inflater = LayoutInflater.from(mContext);
}
public void setDataSource(ArrayList<Drawable> list){
this.drawableList = list;
}
public int getCount() {
if(drawableList != null){
return drawableList.size();
}else{
return 0;
}
}
public Object getItem(int position) {
return drawableList.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(mContext);
if (convertView == null) {
convertView = inflater.inflate(R.layout.grid_item, null);
imageView = (ImageView) convertView.findViewById(R.id.item_image);
imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
convertView.setTag(imageView);
} else {
imageView = (ImageView) convertView.getTag();
}
imageView.setImageDrawable(drawableList.get(position));
return convertView;
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持找一找教程网。
