Question

I am trying to setup a application to load URL in Webview and then give the application the ability to set any image that is clicked to be set as a wallpaper.

So far I am able to load the URL and display the gallery.

I am pretty much stuck on how to set the click-able image was wallpaper.

Any help would be appreciated.

My code:

    package com.dg.rWallpapers;

import java.io.IOException;
import java.net.URISyntaxException;
import java.net.URL;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.Activity;
import android.app.WallpaperManager;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.KeyEvent;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.RelativeLayout;
import android.widget.Toast;

import com.google.ads.AdRequest;
import com.google.ads.AdSize;
import com.google.ads.AdView;

public class rWallpapersActivity extends Activity {
    WebView mWebView;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mWebView = (WebView) findViewById(R.id.webview);
        mWebView.getSettings().setJavaScriptEnabled(true);
        /* mWebView.getSettings().setBuiltInZoomControls(true); */ //Removed I do not want zooming.
        mWebView.getSettings().setUseWideViewPort(true);
        mWebView.loadUrl("http://wall.dg.net?wallId=5");
        mWebView.setWebViewClient(new HelloWebViewClient(this));

        // Lookup R.layout.main
        RelativeLayout layout = (RelativeLayout)findViewById(R.id.ad);

        AdView adView = new AdView(this, AdSize.BANNER, "xxxx");

        // Add the adView to it
        layout.addView(adView);

        // Initiate a generic request to load it with an ad
        AdRequest request = new AdRequest();
        //request.setTesting(true);

        adView.loadAd(request);

    }


    public class HelloWebViewClient extends WebViewClient {

        private WallpaperManager mWallpaperManager;
        private Context mContext;

        public HelloWebViewClient(Context context) {
            mContext = context;
            mWallpaperManager = WallpaperManager.getInstance(context);
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            if (url.endsWith(".png") || url.endsWith(".jpg")) {
                try {
                    Bitmap b = downloadImage(url);
                    mWallpaperManager.setBitmap(b);
                    Toast.makeText(mContext, "Done!!", Toast.LENGTH_SHORT).show();
                    return true;
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return false;
        }

        private Bitmap downloadImage(String fileUrl) throws IOException {
            try {
                HttpGet httpRequest = new HttpGet(new URL(fileUrl).toURI());
                HttpClient httpClient = new DefaultHttpClient();

                HttpResponse response = (HttpResponse) httpClient.execute(httpRequest);
                BufferedHttpEntity buffer = new BufferedHttpEntity(response.getEntity());
                return BitmapFactory.decodeStream(buffer.getContent());
            } catch (IllegalArgumentException e) {
                e.printStackTrace();
            } catch (URISyntaxException e) {
                e.printStackTrace();
            }
            return null;
        }
    }


    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
            mWebView.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }


}

Answer 1

You could use a custom WebViewClient and implement the shouldOverrideUrlLoading() method to handle a click on your images in the activity. There, you can download the image and set it as a wallpaper.

Here is an example for such a WebViewClient:

public class MyWebViewClient extends WebViewClient {

    private WallpaperManager mWallpaperManager;
    private Context mContext;

    public MyWebViewClient(Context context) {
        mContext = context;
        mWallpaperManager = WallpaperManager.getInstance(context);
    }

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        if (url.endsWith(".png") || url.endsWith(".jpg") || url.endsWith(".jpeg")) {
            new AsyncTask<String, Void, Bitmap>() {

                @Override
                protected Bitmap doInBackground(String... params) {
                    try {
                        return downloadImage(params[0]);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }

                    return null;
                }

                @Override
                protected void onPostExecute(Bitmap result) {
                    if (result != null) {
                        try {
                            mWallpaperManager.setBitmap(result);
                            Toast.makeText(mContext, "Done!!", Toast.LENGTH_SHORT).show();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }

            }.execute(url);
            return true;
        }
        return false;
    }

    private Bitmap downloadImage(String fileUrl) throws IOException {
        try {
            HttpGet httpRequest = new HttpGet(new URL(fileUrl).toURI());
            HttpClient httpClient = new DefaultHttpClient();

            HttpResponse response = (HttpResponse) httpClient.execute(httpRequest);
            BufferedHttpEntity buffer = new BufferedHttpEntity(response.getEntity());
            return BitmapFactory.decodeStream(buffer.getContent());
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (URISyntaxException e) {
            e.printStackTrace();
        }
        return null;
    }
}

You add the WebViewClient to your WebView via setWebClient(new MyWebViewClient(this)) in your activity.