如何通过Java code中置布局，以垂直于Android的？ [英] how to center layout to vertical in android through java code?

问题描述

朋友，

我想设置的android：layout_centerVertical =真正的布局性 通过Java $ C $图像℃。

i want to set android:layout_centerVertical="true" property of layout through java code of an image.

任何一个可以指导我如何实现这一目标。这里是我的code。

can any one guide me how to achieve this. here is my code.

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);

params.height = (int)totalHeight;

img.setLayoutParams(params);

我已经使用setScaleType（ScaleType.FIT_CENTER），但没有用的尝试。

i have tried using setScaleType(ScaleType.FIT_CENTER) but no use.

任何帮助将appriciated。

any help would be appriciated.

推荐答案

纠正我，如果我错了，但它听起来就像你正试图设置图像的调整（或位置方向）的布局里面？要做到这一点，你需要设置包含您对齐视图布局的重心财产。

Correct me if I'm wrong but it sounds like you are trying to set the alignment (or positional orientation) of an image inside of a layout? To do that you need to set the gravity property of the layout containing the View you align.

    Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon);

    RelativeLayout layout = (RelativeLayout) findViewById(R.id.layout);
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
            RelativeLayout.LayoutParams.FILL_PARENT, 
            RelativeLayout.LayoutParams.WRAP_CONTENT);

    ImageView imageView = new ImageView(this);
    imageView.setLayoutParams(params);
    imageView.setImageBitmap(bitmap);

    layout.setGravity(Gravity.CENTER_VERTICAL | Gravity.TOP);
    layout.addView(imageView);

在这个例子中，我以编程方式添加图片到我的布局资源一个RelativeLayout的，添加ImageView的，并调整它，所以它会被放置在顶部，垂直的中心位置。

In this example I'm programmatically adding an image to a RelativeLayout in my layout resource, adding an ImageView, and aligning it so it will be placed at the top, vertical center position.

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