我如何设置一个ImageView的宽度和高度编程?


当前回答

您可以为所有情况设置值。

demoImage.getLayoutParams().height = 150;

demoImage.getLayoutParams().width = 150;

demoImage.setScaleType(ImageView.ScaleType.FIT_XY);

其他回答

我用像素和dp做了这个。

private int dimensionInPixel = 200;

如何按像素设置:

view.getLayoutParams().height = dimensionInPixel;
view.getLayoutParams().width = dimensionInPixel;
view.requestLayout();

dp设置方法:

int dimensionInDp = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dimensionInPixel, getResources().getDisplayMetrics());
view.getLayoutParams().height = dimensionInDp;
view.getLayoutParams().width = dimensionInDp;
view.requestLayout();

希望这对你有所帮助。

如果图像视图是动态的,则包含getLayout的答案将失败,并出现空异常。

在这种情况下,正确的方法是:

LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(100, 100);
iv.setLayoutParams(layoutParams);

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);

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。

在需要以编程方式设置小部件大小的场景中,请确保遵守以下规则。

为要添加该视图的布局设置LayoutParam。在我的情况下,我添加到TableRow,所以我必须做TableRow。LayoutParams 遵循以下代码

final float scale = getResources().getDisplayMetrics().density; int dpWidthInPx = (int) (17 * scale); int dpHeightInPx = (int) (17 * scale);

TableRow。LayoutParams deletelayoutParams = new table。LayoutParams (dpWidthInPx dpHeightInPx); button.setLayoutParams (deletelayoutParams); tableRow。addView(按钮,1);