Cannot convert url to bitmap in Android

Question

I am developing an Android App. In my app, I need to convert url into bitmap. I searched online and I found some code in Stack Overflow. I just used it. But it does not work. It is giving me error.

This is my convert method

public final class CommonHelper{
    public static Bitmap ConvertUrlToBitmap(String src)
    {
        try {
            URL url = new URL(src);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setDoInput(true);
            connection.connect();
            InputStream input = connection.getInputStream();
            Bitmap myBitmap = BitmapFactory.decodeStream(input);
            return myBitmap;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }
}

So when I use that method in activity, it is giving me error. This is the error in logcat.

This is the errors

05-05 17:41:16.674 10095-10101/? E/jdwp: Failed sending reply to debugger: Broken pipe
05-05 17:41:16.674 10095-10101/? D/dalvikvm: Debugger has detached; object registry had 1 entries
05-05 17:41:16.770 10095-10095/? W/dalvikvm: VFY: unable to find class referenced in signature (Landroid/view/SearchEvent;)
05-05 17:41:16.770 10095-10095/? I/dalvikvm: Could not find method android.view.Window$Callback.onSearchRequested, referenced from method android.support.v7.view.WindowCallbackWrapper.onSearchRequested
05-05 17:41:16.770 10095-10095/? W/dalvikvm: VFY: unable to resolve interface method 18254: Landroid/view/Window$Callback;.onSearchRequested (Landroid/view/SearchEvent;)Z
05-05 17:41:16.770 10095-10095/? D/dalvikvm: VFY: replacing opcode 0x72 at 0x0002
05-05 17:41:16.770 10095-10095/? I/dalvikvm: Could not find method android.view.Window$Callback.onWindowStartingActionMode, referenced from method android.support.v7.view.WindowCallbackWrapper.onWindowStartingActionMode
05-05 17:41:16.770 10095-10095/? W/dalvikvm: VFY: unable to resolve interface method 18258: Landroid/view/Window$Callback;.onWindowStartingActionMode (Landroid/view/ActionMode$Callback;I)Landroid/view/ActionMode;
05-05 17:41:16.770 10095-10095/? D/dalvikvm: VFY: replacing opcode 0x72 at 0x0002
05-05 17:41:16.782 10095-10098/? D/dalvikvm: GC_CONCURRENT freed 169K, 12% free 2684K/3020K, paused 2ms+0ms, total 5ms
05-05 17:41:16.786 10095-10095/? I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead.
05-05 17:41:16.786 10095-10095/? I/dalvikvm: Could not find method android.content.res.TypedArray.getChangingConfigurations, referenced from method android.support.v7.widget.TintTypedArray.getChangingConfigurations
05-05 17:41:16.786 10095-10095/? W/dalvikvm: VFY: unable to resolve virtual method 522: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
05-05 17:41:16.786 10095-10095/? D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002
05-05 17:41:16.790 10095-10095/? I/dalvikvm: Could not find method android.content.res.TypedArray.getType, referenced from method android.support.v7.widget.TintTypedArray.getType
05-05 17:41:16.790 10095-10095/? W/dalvikvm: VFY: unable to resolve virtual method 544: Landroid/content/res/TypedArray;.getType (I)I
05-05 17:41:16.790 10095-10095/? D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002
05-05 17:41:16.798 10095-10095/? D/dalvikvm: GC_FOR_ALLOC freed 37K, 10% free 2814K/3120K, paused 3ms, total 3ms
05-05 17:41:16.798 10095-10095/? I/dalvikvm-heap: Grow heap (frag case) to 3.981MB for 1127532-byte allocation
05-05 17:41:16.802 10095-10104/? D/dalvikvm: GC_FOR_ALLOC freed <1K, 8% free 3914K/4224K, paused 3ms, total 3ms
05-05 17:41:16.806 10095-10098/? D/dalvikvm: GC_CONCURRENT freed <1K, 8% free 3914K/4224K, paused 0ms+0ms, total 2ms
05-05 17:41:16.834 10095-10098/? D/dalvikvm: GC_CONCURRENT freed 159K, 8% free 4153K/4480K, paused 2ms+0ms, total 5ms
05-05 17:41:16.846 10095-10095/? I/CURRENT_LANGUAGE: 1
05-05 17:41:16.850 10095-10095/? D/AndroidRuntime: Shutting down VM
05-05 17:41:16.850 10095-10095/? W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0xa4b60648)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime: FATAL EXCEPTION: main
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.blog.waiyanhein.mmfashion.mmfashion/com.blog.waiyanhein.mmfashion.mmfashion.MainActivity}: android.os.NetworkOnMainThreadException
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.ActivityThread.access$600(ActivityThread.java:141)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:99)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:137)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5103)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native Method)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:525)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native Method)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:  Caused by: android.os.NetworkOnMainThreadException
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1133)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.io.IoBridge.connect(IoBridge.java:112)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at java.net.Socket.connect(Socket.java:842)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.net.http.HttpConnection.<init>(HttpConnection.java:76)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:316)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.net.http.HttpEngine.connect(HttpEngine.java:311)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:290)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:240)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:81)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at com.blog.waiyanhein.mmfashion.model.CommonHelper.ConvertUrlToBitmap(CommonHelper.java:595)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at com.blog.waiyanhein.mmfashion.mmfashion.MainActivity.addCategoriesToMenu(MainActivity.java:345)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at com.blog.waiyanhein.mmfashion.mmfashion.MainActivity.bindCategoryMenu(MainActivity.java:376)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at com.blog.waiyanhein.mmfashion.mmfashion.MainActivity.onCreate(MainActivity.java:101)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.Activity.performCreate(Activity.java:5133)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.ActivityThread.access$600(ActivityThread.java:141) 
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:99) 
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:137) 
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5103) 
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native Method) 
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:525) 
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
05-05 17:41:16.850 10095-10095/? E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native Method)

Why is that happening and how can I fix that?

I also tried this way

public static Bitmap ConvertUrlToBitmap(String src)
    {
        try{
            URL url = new URL(src);
            Bitmap image = BitmapFactory.decodeStream(url.openConnection().getInputStream());
            return image;
        }
        catch (IOException e)
        {
            return null;
        }
    }

http://stackoverflow.com/questions/6343166/how-to-fix-android-os-networkonmainthreadexception — CommonsWare, May 05 '16 at 21:50

score 0 · Answer 1 · answered May 05 '16 at 22:18

You are trying to connect online and doing network task. All network tasks must be done in a separate thread.

Give this a try:

private Bitmap bitmap;

private class ConvertUrlToBitmap extends AsyncTask<String, Long, Boolean> {
    @Override
    protected Boolean doInBackground(String... params) {
        try {
            URL url = new URL(params[0]);
            bitmap = BitmapFactory.decodeStream(url.openConnection().getInputStream());
            return true;
        } catch (Exception e) {
            Log.e(TAG, e.toString());
            return false;
        }
    }

    @Override
    protected void onPostExecute(Boolean aBoolean) {
        super.onPostExecute(aBoolean);
        if(aBoolean) {
            // download was successful
            // if you want to update your UI, make sure u do it on main thread. like this:
            MyActivity.this.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    // update UI here
                }
            });
        } else {
            // download failed
        }
    }
}

Then on your button click or when you want to download it, just call this:

new ConvertUrlToBitmap().execute(src);

Hope this helps!

score 0 · Accepted Answer · edited May 23 '17 at 12:00

0

You are trying to run network-consuming task in your main thread (what may prevent UI from being refreshed - that's why Android is complaining).

You should start an AsyncTask which you can use to download your image and return in dedicated callback method.

For cases like this, personally, I am using Picasso library. With this tool you can simplify your issue to just few steps as described here.

edited May 23 '17 at 12:00

Community

1
1

answered May 05 '16 at 22:18

Tomasz Dzieniak

2,765
3
24
42

Actually I just need drawable. I want to set icon for menu item like menu.add("Title").setIcon(drawable); . So I think picasso cannot solve that. So how can I achieve it? – Wai Yan Hein May 05 '16 at 22:30
@WaiYan - I suppose you should refine your question to provide more details as the question states you have problem only with downloading images as bitmaps. – Tomasz Dzieniak May 05 '16 at 22:36
Thanks but I fiund the solution. – Wai Yan Hein May 05 '16 at 22:46
@WaiYan - great to hear that you found solutions yourself! :) Do not hesitate to post it as an answer for your own question so other developers in similar situation as yours may find your hints useful. – Tomasz Dzieniak May 05 '16 at 22:55

score 0 · Answer 3 · edited May 06 '16 at 05:04

0

Write below code into your activity file after setContentView(R.layout.activity_your);

if (android.os.Build.VERSION.SDK_INT > 9) {
  StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
  StrictMode.setThreadPolicy(policy);
}

And below import statement into your java file.

import android.os.StrictMode;

edited May 06 '16 at 05:04

Jay Rathod

11,131
6
34
58

answered May 06 '16 at 02:39

Nguyễn Trung Hiếu

2,004
1
10
22

score 0 · Answer 4 · answered May 06 '16 at 04:48

0

try put your code in a Thread.

And I think, you can use a WebView to display Url Image:

webView.loadUrl(urlImage)

answered May 06 '16 at 04:48

D T

3,522
7
45
89

score 0 · Answer 5 · answered May 06 '16 at 05:01

Use AsyncTask for that purpose. You can give this a try.

  class GetImage extends AsyncTask<String, Void, Bitmap> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    public Bitmap doInBackground(String... urls) {
        Bitmap map = null;
        try {
            URL url = new URL(urls[0]);
            HttpURLConnection connection =(HttpURLConnection)url.openConnection();
            connection.setDoInput(true);
            connection.connect();
            InputStream input = connection.getInputStream();
            map= BitmapFactory.decodeStream(input);


        } catch (Exception e) {

            e.printStackTrace();

        }

        return map;
    }

    protected void onPostExecute(Bitmap bMap) {


        try {
            if (!isCancelled()) {
                if (bMap != null) {
                   //set your image view here.

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

}

call GetImage as GetImage img= new GetImage(); img.execute("your image url"); — Riten, May 06 '16 at 05:02

Cannot convert url to bitmap in Android

5 Answers5