129 lines
3.9 KiB
Java
129 lines
3.9 KiB
Java
package com.img.rabbit.utils;
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import java.io.BufferedWriter;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.PrintWriter;
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import android.content.ContentResolver;
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import android.content.ContentValues;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Color;
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import android.net.Uri;
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import android.os.Environment;
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import android.provider.MediaStore;
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import android.widget.Toast;
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public class Bitmap2SVG
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{
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public static boolean convert(Context context, File output, Bitmap input){
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Bitmap2SVG svg;
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try
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{
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svg = new Bitmap2SVG( new PrintWriter( new BufferedWriter( new FileWriter( output ) ) ), true );
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} catch (IOException e)
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{
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return false;
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}
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svg.printSVGHeader( input.getWidth(), input.getHeight() );
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svg.printSVGBody( input );
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svg.printSVGFooter();
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saveToGallery(context, output, "displayName.svg");
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return true;
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}
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private boolean trc_del;
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private PrintWriter pw;
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private int w, h;
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private Bitmap2SVG( PrintWriter pw, boolean trc_delete )
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{
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this.pw = pw;
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trc_del = trc_delete;
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}
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private void printSVGHeader( int width, int height )
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{
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pw.println( "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>" );
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pw.print( "<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" width=\"" );
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pw.print( width );
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pw.print( "\" height=\"" );
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pw.print( height );
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pw.println( "\">" );
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}
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private void printSVGFooter()
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{
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pw.println( "</svg>" );
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pw.close();
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}
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private void printSVGBody( Bitmap bmp )
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{
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int x, y, c, a;
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w = bmp.getWidth();
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h = bmp.getHeight();
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for ( y = 0 ; y < h ; ++y )
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{
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for ( x = 0 ; x < w ;++x )
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{
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c = bmp.getPixel( x, y );
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a = Color.alpha( c );
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if ( trc_del && a == 0 ){ continue; }
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printDot( x, y, rgb( c ), a );
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}
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}
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}
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private void printDot( int x, int y, String rgb, int a )
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{
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pw.print( "<rect width=\"1\" height=\"1\" x=\"" );
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pw.print( x );
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pw.print( "\" y=\"" );
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pw.print( y );
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pw.print( "\" " );
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pw.print( "style=\"fill:#" );
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pw.print( rgb );
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if ( a < 255 )
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{
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pw.print( ";fill-opacity:" );
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pw.print( a / 255.0 );
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}
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pw.println( ";\" />" );
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}
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private static String rgb( int c )
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{
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return String.format( "%02x%02x%02x", Color.red( c ), Color.green( c ), Color.blue( c ) );
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}
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public static void saveToGallery(Context context, File svgFile, String displayName) {
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ContentValues values = new ContentValues();
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// 关键点：显式指定 MIME 类型为 SVG
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values.put(MediaStore.Images.Media.MIME_TYPE, "image/svg+xml");
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values.put(MediaStore.Images.Media.DISPLAY_NAME, displayName + ".svg");
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values.put(MediaStore.Images.Media.RELATIVE_PATH, Environment.DIRECTORY_PICTURES);
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ContentResolver resolver = context.getContentResolver();
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Uri uri = resolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
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if (uri != null) {
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try (OutputStream os = resolver.openOutputStream(uri);
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FileInputStream fis = new FileInputStream(svgFile)) {
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byte[] buffer = new byte[1024];
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int len;
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while ((len = fis.read(buffer)) != -1) {
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os.write(buffer, 0, len);
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}
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// 此时文件已带上正确的 MIME 类型存入相册
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Toast.makeText(context, "SVG已保存", Toast.LENGTH_SHORT).show();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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