svg-android imageview不工作

Question

我需要在我的android应用程序中显示svg文件。svg-android似乎是唯一包含文档的库，因此是我的第一种方法。惟一可用的示例演示了如何创建图像视图、附加svg图像以及如何将其附加到主内容视图。然而，我想要一个svg文件显示在我已经定义的RelativeLayout上。我尝试了如下实现：

ImageView imageView = new ImageView(this); 
SVG svg = SVGParser.getSVGFromResource(getResources(), R.raw.logo); 
imageView.setImageDrawable(svg.createPictureDrawable());
RelativeLayout home_header = (RelativeLayout) findViewById(R.id.home_header);
home_header.addView(imageView);

看起来一切正常(没有警告/错误)，但当我测试应用程序日志时，cat报告：

05-27 11:25:43.940: I/Adreno200-EGLSUB(28492): <ConfigWindowMatch:2078>: Format RGBA_8888.
05-27 11:25:43.950: E/(28492): Can't open file for reading
05-27 11:25:43.960: E/(28492): Can't open file for reading

我已验证以下内容：-文件未在任何其他程序中打开-文件格式正确

这里我漏掉了什么？对可能发生的事情有什么建议吗？

Answer 1

经过一些调试和比较仿真器和本机应用程序，我发现“无法打开文件读取”与svg文件不显示无关。相反，它与硬件加速有关。我必须在我的清单中设置以下内容

android:hardwareAccelerated="false" 

问题解决了。浪费时间。脑震荡了。

Answer 2

android:hardwareAccelerated="false"将禁用整个活动的硬件渲染。另一种选择可能是直接使用：

imageView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);

这应该只对该视图禁用它。

PS。如果您正在寻找具有更好文档(和更多特性)的SVG库，请尝试我的：http://code.google.com/p/androidsvg/

Answer 3

现在还有一个不需要使用这个库的选择-- https://github.com/wnafee/vector-compat ( android:hardwareAccelerated="false" 14+)

android {
    // use version 22 or higher
    buildToolsVersion "22.0.1"
    ...
}
dependencies {
    compile 'com.wnafee:vector-compat:1.0.5'
    ...
}

并创建一个使用向量compat类的自定义ImageView类-

public class SvgImageView extends ImageView {        
    private Drawable icon;


    public SvgImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypedArray ta = context.obtainStyledAttributes(attrs,
                R.styleable.button_left, 0, 0);

        try {
            int resId = ta.getResourceId(R.styleable.button_left_b_icon, -1);            
            if (resId != -1) {
                icon = ResourcesCompat.getDrawable(this.getContext(), resId);

            }


        } finally {
            ta.recycle();
        }


        if (icon != null) {
            setImage(icon);
        }

    }   

    public void setImage(Drawable icon) {
        SvgImageView.this.setImageDrawable(icon);

    }



}

矢量图像示例-

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:width="@dimen/logo_dimen"
    android:height="@dimen/logo_dimen"
    android:viewportWidth="@integer/view_port_dimen_logo"
    android:viewportHeight="@integer/view_port_dimen_logo"

    app:vc_viewportWidth="@integer/view_port_dimen_logo"
    app:vc_viewportHeight="@integer/view_port_dimen_logo">
    <group
        android:name="rotationGroup"
        android:pivotX="0"
        android:pivotY="0"
        android:rotation="0">

        <path
            android:name="v"
            android:fillColor="@color/white"
            android:pathData="m15.5,15.6c0,-1.5 2.8,-1.9 2.8,-5c0,-1.5 -0.7,-2.6 -1.8,-3.5h1.6l1.7,-1.1h-5c-1.7,0 -3.5,0.4 -4.8,1.6c-1,0.8 -1.6,2.1 -1.6,3.4c0,2.4 1.9,4.1 4.2,4.1c0.3,0 0.5,0 0.8,0c-0.1,0.3 -0.3,0.6 -0.3,1c0,0.7 0.3,1.2 0.8,1.8c-1.6,0.1 -3.4,0.3 -4.9,1.2c-1.1,0.7 -2,1.8 -2,3.2c0,0.6 0.2,1.1 0.4,1.6c1,1.7 3.2,2.2 5,2.2c2.3,0 4.9,-0.7 6.1,-2.8c0.4,-0.6 0.6,-1.3 0.6,-2.1c0.2,-3.5 -3.6,-4 -3.6,-5.6zm-1.7,-1.2c-2.2,0 -3.2,-2.8 -3.2,-4.6c0,-0.7 0.1,-1.4 0.6,-1.9c0.4,-0.6 1.1,-0.9 1.7,-0.9c2.2,0 3.2,3 3.2,4.8c0,0.7 -0.1,1.4 -0.6,1.9c-0.4,0.4 -1.1,0.7 -1.7,0.7zm0,10.5c-1.9,0 -4.5,-0.8 -4.5,-3.2c0,-2.5 2.9,-3.1 4.9,-3.1c0.2,0 0.4,0 0.6,0c1.2,0.8 2.8,1.8 2.8,3.4c-0.1,2.2 -2,2.9 -3.8,2.9zm9.7,-10.5v-2.6h-1.3v2.6h-2.5v1.3h2.5v2.6h1.3v-2.6h2.6v-1.3h-2.6l0,0z"
            app:vc_fillColor="@color/white"
            app:vc_pathData="m15.5,15.6c0,-1.5 2.8,-1.9 2.8,-5c0,-1.5 -0.7,-2.6 -1.8,-3.5h1.6l1.7,-1.1h-5c-1.7,0 -3.5,0.4 -4.8,1.6c-1,0.8 -1.6,2.1 -1.6,3.4c0,2.4 1.9,4.1 4.2,4.1c0.3,0 0.5,0 0.8,0c-0.1,0.3 -0.3,0.6 -0.3,1c0,0.7 0.3,1.2 0.8,1.8c-1.6,0.1 -3.4,0.3 -4.9,1.2c-1.1,0.7 -2,1.8 -2,3.2c0,0.6 0.2,1.1 0.4,1.6c1,1.7 3.2,2.2 5,2.2c2.3,0 4.9,-0.7 6.1,-2.8c0.4,-0.6 0.6,-1.3 0.6,-2.1c0.2,-3.5 -3.6,-4 -3.6,-5.6zm-1.7,-1.2c-2.2,0 -3.2,-2.8 -3.2,-4.6c0,-0.7 0.1,-1.4 0.6,-1.9c0.4,-0.6 1.1,-0.9 1.7,-0.9c2.2,0 3.2,3 3.2,4.8c0,0.7 -0.1,1.4 -0.6,1.9c-0.4,0.4 -1.1,0.7 -1.7,0.7zm0,10.5c-1.9,0 -4.5,-0.8 -4.5,-3.2c0,-2.5 2.9,-3.1 4.9,-3.1c0.2,0 0.4,0 0.6,0c1.2,0.8 2.8,1.8 2.8,3.4c-0.1,2.2 -2,2.9 -3.8,2.9zm9.7,-10.5v-2.6h-1.3v2.6h-2.5v1.3h2.5v2.6h1.3v-2.6h2.6v-1.3h-2.6l0,0z" />

    </group>
</vector>

示例：

<packagename.SvgImageView     

            app:b_icon="@drawable/google_logo"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/imageView3" />