如何将背景设置为Android Gridview?
问题描述:
我需要设置图像作为android gridview中的背景。我有使用图像视图来加载图像的代码。以下代码是我的代码,请帮我解决这个问题。如何将背景设置为Android Gridview?
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
};
}
任何身体知道如何设置图片为电网项目的背景?
答
是的,我明白了。您希望显示一个Custom GridView,并为每个网格元素设置背景,并在其上添加一些内容。
第一步是创建一个布局,并在自定义适配器的getView方法中使其膨胀。
这里是一个例子,
http://www.technotalkative.com/android-gridview-example/
http://android-vogue.blogspot.in/2011/06/custom-gridview-in-android-with.html。
答
好吧,如果你想设置一个背景图片为GridView(整个景观的背景下,我的意思),你只需要设置在你的Activity类:
GridView gridview = (GridView)findViewById(R.id.gridview);
gridview.setBackgroundResource(R.drawable.sampleImage);
或者里面你XML布局文件:
android:background="@drawable/sampleImage"
相反,如果你想设置一个背景图像中的所有项目/你的GridView(所有项目相同的图像)的元素,你需要做的仅仅是在你ImageAdapter :
private Integer mThumbIds = R.drawable.sampleImage;
...
imageView.setImageResource(mThumbIds);
需要注意的是,你的适配器里面,你甚至可以用它代替了ImageView的一个TextView,这样就可以有图像和文字一起:
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;
}
和究竟是什么问题? –
老兄我的问题是,我需要将mThumbIds数组图像中的图像设置为网格图块中的背景,而不是图像视图,因为我需要将一些内容放入网格图块中。你知道该怎么做吗? –
您是否尝试将其设置在'gridview.xml'中? –