Android 使用WebView控件展示SVG图

1.添加布局界面代码：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/btnGetSVG"
        android:layout_width="120dp"
        android:layout_height="50dp"
        android:text="Getmage" />

    <WebView
        android:id="@+id/webView"
        android:layout_width="600dp"
        android:layout_height="400dp" />

</LinearLayout>

2.添加java代码：

package com.example.testdemo;

import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.Button;

public class MainActivity extends Activity {

    private Button btnGetSVG;
    private WebView webView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btnGetSVG = (Button) findViewById(R.id.btnGetSVG);
        webView = (WebView) findViewById(R.id.webView);
        btnGetSVG.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                readHtmlFormAssets();
            }
        });

    }

    // 读取SVG文件方法
    private void readHtmlFormAssets() {
        WebSettings webSettings = webView.getSettings();
        webSettings.setLoadWithOverviewMode(true);
        webSettings.setJavaScriptEnabled(true);
        webSettings.setUseWideViewPort(true);
        webView.getSettings().setBuiltInZoomControls(true);// 会出现放大缩小的按钮
        webView.getSettings().setSupportZoom(true);
        webView.getSettings().setSupportMultipleWindows(true);
        webView.setInitialScale(75);

        try {
            // SVG图所在路径
            String svg_path = "file://"
                    + Environment.getExternalStorageDirectory()
                    + "/svg/115.svg";

            if (svg_path.contains("#")) {
                svg_path = svg_path.replaceAll("#", "%23");
            }
            webView.loadUrl(svg_path);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}