Read Gif Images using WebView android

前端未结

关注

 4  1746

渐次进展 2021-01-01 08:30

When I try to read a gif images using a WebView in Android 2.3.3 API 10, it\'s not animated (it appears static). How can I solve this issue? Is there any setting I must chan

4条回答

悲哀的现实 (楼主)

2021-01-01 08:45

When you are trying to load gif from assets directory, its not animated, you should use GifWebView for this.

activity_main.xml

MainActivity.java

package com.test2;

import java.io.InputStream;

import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends Activity {

    WebView webviewActionView;

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

        InputStream stream = null;
        try {
            stream = getAssets().open("loading2.gif");
        } catch (Exception e) {
            e.printStackTrace();
        }

        webviewActionView = (WebView)findViewById(R.id.webviewActionView);
        webviewActionView.setWebViewClient(new MyWebViewClient());
        webviewActionView.getSettings().setJavaScriptEnabled(true);

        GifWebView view = new GifWebView(this, stream);
        webviewActionView.addView(view);
    }

    private class MyWebViewClient extends WebViewClient {
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }
    }
}

GifWebView.java

package com.test2;

import java.io.InputStream;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Movie;
import android.os.SystemClock;
import android.view.View;

public class GifWebView extends View {
    private Movie mMovie;
    InputStream mStream;
    long mMoviestart;

    public GifWebView(Context context, InputStream stream) {
        super(context);
        mStream = stream;
        mMovie = Movie.decodeStream(mStream);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        canvas.drawColor(Color.TRANSPARENT);
        super.onDraw(canvas);
        final long now = SystemClock.uptimeMillis();

        if (mMoviestart == 0) {
            mMoviestart = now;
        }
        final int relTime = (int) ((now - mMoviestart) % mMovie.duration());
        mMovie.setTime(relTime);
        mMovie.draw(canvas, 10, 10);
        this.invalidate();
    }
}