Android图片大小调整动态实现方法

要找个方法让图片自适应大小,让图片能自适应。

      以下就是Android图片大小调整的相关代码示例：

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private Bitmap getImageFromAssetFile(String fileName,int how){
    Bitmap image = null ;
    try {
        AssetManager am = game.getAssets();
        InputStream is = am.open(fileName);
        image = BitmapFactory.decodeStream(is);
        is.close();
    }catch (Exception e){
    }
    return zoomImage(image,how);
}

public Bitmap zoomImage(Bitmap bgimage,int how) {
    int bmpwidth = bgimage.getWidth();
    int bmpheight = bgimage.getHeight();
    float scaleWidth=0;
    float scaleHeight=0;
    Matrix matrix = new Matrix();
    if(how==0){
        scaleWidth = ((float) width) / bmpwidth;
        scaleHeight = ((float) height) / bmpheight;
    }else{
        scaleWidth=Math.min(width,height)/bmpwidth;
        scaleHeight=Math.min(width, height)/bmpheight;
    }
}

private Bitmap getImageFromAssetFile(String fileName,int how){
    Bitmap image = null ;
    try {
        AssetManager am = game.getAssets();
        InputStream is = am.open(fileName);
        image = BitmapFactory.decodeStream(is);
        is.close();
    }catch (Exception e){
    }
    return zoomImage(image,how);

}

public Bitmap zoomImage(Bitmap bgimage,int how) {
    int bmpwidth = bgimage.getWidth();
    int bmpheight = bgimage.getHeight();
    float scaleWidth=0;
    float scaleHeight=0;
    Matrix matrix = new Matrix();
    if(how==0){
        scaleWidth = ((float) width) / bmpwidth;
        scaleHeight = ((float) height) / bmpheight;
    }else{
        scaleWidth=Math.min(width,height)/bmpwidth;
        scaleHeight=Math.min(width, height)/bmpheight; 
    }
}

其中，scaleWidth和scaleHeight是欲缩放后的大小，这里加个参数how是防止有不需要缩放的情况~

Android图片大小调整的操作方法就为大家介绍到这里。