How To Set A Image To A Image View From A Url Android

I am trying to download and show a image in my imageview from URL that i will get dyncamically .I have tried this way URL url = new URL(parsedWeatherResponse.getWeatherIconUrl()

Solution 1:

You are running the network related operation on the ui thread. So, you get NetworkOnMainThreadException.

Bitmapbmp= BitmapFactory.decodeStream(url.openConnection().getInputStream());

http://developer.android.com/reference/android/os/NetworkOnMainThreadException.html

You should use a Thread or Asynctask.

http://developer.android.com/reference/android/os/AsyncTask.html.

Check the docs there is an example.

Example:

publicclassMainActivityextendsActivity {
    ImageView iv ;
    ProgressDialog pd; 
@OverridepublicvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    pd = newProgressDialog(this);
    pd.setMessage("Downloading Image");
    iv = (ImageView) findViewById(R.id.imageView1);
    Button b1 = (Button) findViewById(R.id.button1);
    b1.setOnClickListener(newOnClickListener()
    {

        @OverridepublicvoidonClick(View v) {
            // TODO Auto-generated method stubnewDownloadImageTask(iv).execute("http://a3.twimg.com/profile_images/740897825/AndroidCast-350_normal.png");
        }

    });

}
classDownloadImageTaskextendsAsyncTask<String, Void, Bitmap> {
    ImageView bmImage;

    publicDownloadImageTask(ImageView bmImage) {
        this.bmImage = bmImage;
    }

    @OverrideprotectedvoidonPreExecute() {
        // TODO Auto-generated method stubsuper.onPreExecute();
        pd.show();
    }

    protectedBitmapdoInBackground(String... urls) {
        String urldisplay = urls[0];
        Bitmap mIcon11 = null;
        try {
          InputStreamin = new java.net.URL(urldisplay).openStream();
          mIcon11 = BitmapFactory.decodeStream(in);
        } catch (Exception e) {
            Log.e("Error", e.getMessage());
            e.printStackTrace();
        }
        return mIcon11;
    }

    @OverrideprotectedvoidonPostExecute(Bitmap result) {
        super.onPostExecute(result);
        pd.dismiss();
        bmImage.setImageBitmap(result);
    }
  }
}

activity_main.xml

<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"xmlns:android1="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent" ><ImageViewandroid:id="@+id/imageView1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentTop="true"android:layout_centerHorizontal="true"android:layout_marginTop="171dp"android:src="@drawable/ic_launcher" /><Buttonandroid:id="@+id/button1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentBottom="true"android:layout_centerHorizontal="true"android:layout_marginBottom="78dp"android:text="Button" /></RelativeLayout>

Snap

Solution 2:

You're getting NetworkOnMainThreadException which indicates that you're performing network operation on main thread, while it should be performed in other thread.

Follow this question for further information: How to fix android.os.NetworkOnMainThreadException?

Solution 3:

As you are running Network Related work on MainThread i.e. UIThread which cause UIThread not to laid out it's Viewon Screen or Activity. That's according to ThreadPolicy all the time consuming and variable operation are need to performed on AysncTask or Thread.

As per below LongOperation is AsyncTask which can be executed by calling execute() on it.

new LongOperation().execute();  

---

privateclassLongOperationextendsAsyncTask<String, Void, Bitmap> {

      @OverrideprotectedStringdoInBackground(Bitmap... params) 
      {
       try 
          {
          URL url = newURL(parsedWeatherResponse.getWeatherIconUrl());
          Bitmap bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
          } 
       catch (InterruptedException e) {
          // TODO Auto-generated catch block
            e.printStackTrace();
           }
       return bmp;
      }      

      @OverrideprotectedvoidonPostExecute(Bitmap bmp) 
      {
       super.onPostExecute(result);
       weather_image.setImageBitmap(bmp);
       }

      @OverrideprotectedvoidonPreExecute() {
      }

      @OverrideprotectedvoidonProgressUpdate(Void... values) {
      }
}   

Solution 4:

You can directly show image from web without downloading it. Please check the below function . It will show the images from the web into your image view.

publicstatic Drawable LoadImageFromWebOperations(String url) {
    try {
        InputStream is = (InputStream) new URL(url).getContent();
        Drawable d = Drawable.createFromStream(is, "src name");
        return d;
    } catch (Exception e) {
        returnnull;
    }
}

then set image to imageview using code in your activity.