设置的最大宽度上的ViewGroup [英] Setting a maximum width on a ViewGroup

问题描述

我如何设置的ViewGroup的最大宽度？我使用的是 Theme.Dialog 的活动，但是，这并没有看起来那么好当调整到更大的屏幕，它也是几分轻巧，我不希望它占用整个屏幕。

How do I set the maximum width of a ViewGroup? I am using a Theme.Dialog activity, however, this does not look so good when resized to bigger screens, it's also sort of lightweight and I don't want it taking up the whole screen.

我想这个建议无济于事。此外，也没有机器人：了maxWidth 像一些观点性

I tried this suggestion to no avail. Also, there is no android:maxWidth property like some views.

有没有办法限制对根的LinearLayout因此，只有（例如）640浸？我愿意改变到另一个ViewGroup中这一点。

Is there a way to restrict the root LinearLayout so that it is only (for example) 640 dip? I am willing to change to another ViewGroup for this.

有什么建议？

推荐答案

一个选项，这是我做的是延长的LinearLayout和覆盖onMeasure功能。例如：

One option which is what I did is to extend LinearLayout and override the onMeasure function. For example:

public class BoundedLinearLayout extends LinearLayout {

    private final int mBoundedWidth;

    private final int mBoundedHeight;

    public BoundedLinearLayout(Context context) {
        super(context);
        mBoundedWidth = 0;
        mBoundedHeight = 0;
    }

    public BoundedLinearLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.BoundedView);
        mBoundedWidth = a.getDimensionPixelSize(R.styleable.BoundedView_bounded_width, 0);
        mBoundedHeight = a.getDimensionPixelSize(R.styleable.BoundedView_bounded_height, 0);
        a.recycle();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // Adjust width as necessary
        int measuredWidth = MeasureSpec.getSize(widthMeasureSpec);
        if(mBoundedWidth > 0 && mBoundedWidth < measuredWidth) {
            int measureMode = MeasureSpec.getMode(widthMeasureSpec);
            widthMeasureSpec = MeasureSpec.makeMeasureSpec(mBoundedWidth, measureMode);
        }
        // Adjust height as necessary
        int measuredHeight = MeasureSpec.getSize(heightMeasureSpec);
        if(mBoundedHeight > 0 && mBoundedHeight < measuredHeight) {
            int measureMode = MeasureSpec.getMode(heightMeasureSpec);
            heightMeasureSpec = MeasureSpec.makeMeasureSpec(mBoundedHeight, measureMode);
        }
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
}

然后你的XML将使用自定义类：

Then you XML would use the custom class:

<com.yourpackage.BoundedLinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:bounded_width="900dp">

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
    />
</com.youpackage.BoundedLinearLayout>

而attr.xml文件条目

And the attr.xml file entry

<declare-styleable name="BoundedView">
    <attr name="bounded_width" format="dimension" />
    <attr name="bounded_height" format="dimension" />
</declare-styleable>

编辑：这是实际code我现在使用。这仍然是不完全的，但是适用于大多数情况下。

This is the actual code I am using now. This is still not complete but works in most cases.

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