int newHeight = 150;
            int newWidth = 150; 
            holder.iv_arrow.requestLayout();
            holder.iv_arrow.getLayoutParams().height = newHeight;
            holder.iv_arrow.getLayoutParams().width = newWidth;
            holder.iv_arrow.setScaleType(ImageView.ScaleType.FIT_XY);
            holder.iv_arrow.setImageResource(R.drawable.video_menu);

以下是完成任务的简单方法:

setContentView(R.id.main);    
ImageView iv = (ImageView) findViewById(R.id.left);
int width = 60;
int height = 60;
LinearLayout.LayoutParams parms = new LinearLayout.LayoutParams(width,height);
iv.setLayoutParams(parms);

另一种方法是，如果你想要给出屏幕的高度和宽度，那么使用下面的代码:

setContentView(R.id.main);    
Display display = getWindowManager().getDefaultDisplay();
ImageView iv = (LinearLayout) findViewById(R.id.left);
int width = display.getWidth(); // ((display.getWidth()*20)/100)
int height = display.getHeight();// ((display.getHeight()*30)/100)
LinearLayout.LayoutParams parms = new LinearLayout.LayoutParams(width,height);
iv.setLayoutParams(parms);

希望对你使用充分。

为了以编程方式设置ImageView和Height，你可以这样做

            //Makesure you calculate the density pixel and multiply it with the size of width/height
            float dpCalculation = getResources().getDisplayMetrics().density;
            your_imageview.getLayoutParams().width = (int) (150 * dpCalculation);

            //Set ScaleType according to your choice...
            your_imageview.setScaleType(ImageView.ScaleType.CENTER_CROP);

image_view.getLayoutParams().height 

返回以像素为单位的高度值。您需要首先获取屏幕尺寸以正确设置值。

 Display display = context.getWindowManager().getDefaultDisplay();
 DisplayMetrics outMetrics = new DisplayMetrics();
 display.getMetrics(outMetrics);
 int screen_height = outMetrics.heightPixels;
 int screen_width = outMetrics.widthPixels;

在你得到屏幕尺寸后，你可以设置imageview的宽度和高度使用适当的边距。

 view.getLayoutParams().height = screen_height - 140;
 view.getLayoutParams().width = screen_width - 130 ;

如果你需要将你的宽度或高度设置为match_parent(与其父类一样大)或wrap_content(大到足以适合它自己的内部内容)，那么ViewGroup。LayoutParams有两个常量:

imageView.setLayoutParams(
    new ViewGroup.LayoutParams(
        // or ViewGroup.LayoutParams.WRAP_CONTENT
        ViewGroup.LayoutParams.MATCH_PARENT,      
        // or ViewGroup.LayoutParams.WRAP_CONTENT,     
        ViewGroup.LayoutParams.MATCH_PARENT ) );

或者你也可以像哈基姆·扎伊德的回答那样

imageView.getLayoutParams().width = ViewGroup.LayoutParams.MATCH_PARENT;
//...

的形象。setLayoutParams(新ViewGroup。LayoutParams(宽度、高度));

例子:

image.setLayoutParams(new ViewGroup.LayoutParams(150, 150));