Programmaticaly充气查看与pre定义的措施 [英] Programmaticaly Inflate View with pre-defined measures

问题描述

所以我有这样的资源布局和我想用的布局和heigth膨胀吧：

So I have a layout resource like this and a I want to inflate it with the layout with and heigth:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="75px"
    android:layout_height="25px">

    <TextView
        android:id="@+id/drawable_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:text="Name" />

    <TextView
        android:id="@+id/drawable_description"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@id/drawable_name"
        android:layout_alignParentLeft="true"
        android:gravity="center_horizontal"
        android:layout_below="@+id/drawable_name"
        android:text="Some Text" />

</RelativeLayout>

视图可以是任何东西，而且我将其转换为位图。

The View could be anything, and I'm converting it to Bitmap.

private Bitmap getBitmap(View v){
    v.measure(MeasureSpec.makeMeasureSpec(mDrawableWidth, MeasureSpec.EXACTLY),
              MeasureSpec.makeMeasureSpec(mDrawableHeight, MeasureSpec.EXACTLY));
    v.layout(0, 0, mDrawableWidth, mDrawableHeight);
    Bitmap returnedBitmap = Bitmap.createBitmap(mDrawableWidth, mDrawableHeight,Bitmap.Config.ARGB_8888);
    Canvas c=new Canvas(returnedBitmap);
    v.draw(c);
    return returnedBitmap;
}

到现在为止，我有宽度和高度很难$ C $的CD，我希望能够做到这一点编程，访问 layout_width 和 layout_height 。
有什么办法来实现这一目标？
如果有夸大这种价值观认为，另一种方式而不措施指定它们，请让我知道。

Until now, I have the Width and Height hardcoded and I want to be able to do it programatically, accessing the layout_width and layout_height. Is there any way to achieve this? If there's another way of inflating the view with this values without specifying them in the measure, please let me know.

如果我创建一个自定义视图，是否有指定固定的宽度和高度的任何机会？

If I create a Custom View, is there any chance of specifying the fixed width and height?

谢谢，迪奥戈。

推荐答案

这个例子应该工作。可能需要一些调整，以得到它完美的，根据您的需求，但给它一个镜头：

This example should work. Might take some tweaking to get it perfect, depending on your needs, but give it a shot:

//Get a bitmap from a layout resource. Inflates it into a discarded LinearLayout
//so that the LayoutParams are preserved
public static Bitmap getLayoutBitmap (Context c, int layoutRes, int maxWidth, int maxHeight) {
    View view = LayoutInflater.from(c).inflate(layoutRes, new LinearLayout(c), false);
    return getViewBitmap(view, maxWidth, maxHeight);
}

public static Bitmap getViewBitmap (View v, int maxWidth, int maxHeight) {
    ViewGroup.LayoutParams vParams = v.getLayoutParams();

    //If the View hasn't been attached to a layout, or had LayoutParams set
    //return null, or handle this case however you want
    if (vParams == null) {
        return null;
    }

    int wSpec = measureSpecFromDimension(vParams.width, maxWidth);
    int hSpec = measureSpecFromDimension(vParams.height, maxHeight);

    v.measure(wSpec, hSpec);

    final int width = v.getMeasuredWidth();
    final int height = v.getMeasuredHeight();

    //Cannot make a zero-width or zero-height bitmap
    if (width == 0 || height == 0) {
        return null;
    }

    v.layout(0, 0, width, height);

    Bitmap result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(result);
    v.draw(canvas);

    return result;
}

private static int measureSpecFromDimension (int dimension, int maxDimension) {
    switch (dimension) {
        case ViewGroup.LayoutParams.MATCH_PARENT:
            return View.MeasureSpec.makeMeasureSpec(maxDimension, View.MeasureSpec.EXACTLY);
        case ViewGroup.LayoutParams.WRAP_CONTENT:
            return View.MeasureSpec.makeMeasureSpec(maxDimension, View.MeasureSpec.AT_MOST);
        default:
            return View.MeasureSpec.makeMeasureSpec(dimension, View.MeasureSpec.EXACTLY);
    }
}

这篇关于Programmaticaly充气查看与pre定义的措施的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！