如何在我的图像中制作发光效果?

问题描述

我创建了简单的 gridview 应用程序.现在我想为我的图像创建发光效果，请帮助我如何为我的网格视图图像创建发光效果?如果有人知道请给我一些想法和示例代码....

I created simple gridview application. Now I wish to create glow effect for my images, please help me how to create glow effect for my gird view images? if anyone know please give me some idea and sample code....

这是我现在的截图:

这是我预期的发光效果截图:

And this is my expected glow effect screenshot:

源代码:

main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
<TextView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello" />
<GridView 
    android:id="@+id/gridview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:numColumns="auto_fit"
    android:verticalSpacing="10dp"
    android:horizontalSpacing="10dp"
    android:columnWidth="90dp"
    android:stretchMode="columnWidth"
    android:gravity="center" />
</LinearLayout>

GridviewExampleActivity.java

GridviewExampleActivity.java

public class GridviewExampleActivity extends Activity
{

public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

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

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)
{
 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(R.drawable.icon);

return imageView;
                                }
private Integer[] mThumbIds = {
        R.drawable.icon, R.drawable.icon,
        R.drawable.icon, R.drawable.icon,
        R.drawable.icon, R.drawable.icon,
        R.drawable.icon, R.drawable.icon,
        R.drawable.icon, R.drawable.icon};
}   

}

发光效果截图:![在此处输入图片说明][3]

glow effect screen shot:![enter image description here][3]

推荐答案

您可以使用以下代码使自定义视图中的每个图像发光

You can use the following code to make each image in your custom view glow

图片适配器的getView()函数应该是这样的:

the getView() function of the image adapter should be like this:

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

if (convertView == null)
{
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;
   Bitmap Image=BitmapFactory.decodeResource(mContext.getResources(),mThumbIds[position]);
        Image=Image.copy(Bitmap.Config.ARGB_8888,true);
        Paint paint=new Paint();
        paint.setDither(true);
        paint.setFilterBitmap(true);
        Bitmap glow=BitmapFactory.decodeResource(mContext.getResources(), R.drawable.glow_image);
        Bitmap bitmap=Bitmap.createBitmap(Image.getWidth(),Image.getHeight(), Config.ARGB_8888);
        Canvas canvas=new Canvas(bitmap);

        canvas.drawBitmap(glow, new Rect(0,0,glow.getWidth(),glow.getHeight()), new Rect(0,0,Image.getWidth(),Image.getHeight()),paint);
        canvas.drawBitmap(Image, new Rect(0,0,Image.getWidth(),Image.getHeight()), new Rect(0+5,0+5,Image.getWidth()-5,Image.getHeight()-5),paint);



        imageView.setImageBitmap(bitmap);


   return imageView;
   }

R.drawable.glow_image 是可以用作增长效果图像的 png 图像

R.drawable.glow_image is the png image you can use as the grow effect image

Glow.png

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