Android百分比布局(PercentRelativeLayout)嵌套NavigationView自定义宽度

因为NavigationView必须嵌套在DrawerLayout里，当DrawerLayout不是根布局时，就没办法用match_parent等定义宽高，会报错。所以要重写DrawerLayout的onMeasure()方法：

public class MyDrawerLayout extends DrawerLayout {
    public MyDrawerLayout(@NonNull Context context) {
        super(context);
    }

    public MyDrawerLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public MyDrawerLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        widthMeasureSpec = MeasureSpec.makeMeasureSpec(
                MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.EXACTLY);
        heightMeasureSpec = MeasureSpec.makeMeasureSpec(
                MeasureSpec.getSize(heightMeasureSpec), MeasureSpec.EXACTLY);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
}

（以上代码copy的）

然后进行嵌套布局：

<android.support.percent.PercentRelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <hyjob.dhcc.com.test_1.MyDrawerLayout
        app:layout_widthPercent="70%"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true">

        <android.support.design.widget.NavigationView
            android:id="@+id/menu"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            app:headerLayout="@layout/layout_menu_header"
            app:menu="@menu/menu" />
    </hyjob.dhcc.com.test_1.MyDrawerLayout>
</android.support.percent.PercentRelativeLayout>

但是吧，NavigationView的宽度要比DrawerLayout小一点，待补充。

来源：CSDN

作者：月圆时立夏

链接：https://blog.csdn.net/gsmmSummer/article/details/103631656