android - Caused by: android.view.ViewRootImpl$CalledFromWrongThreadException
- by chinna_82
Im trying to get image from my URL and display in application but it throw error Caused by: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. Below is my code
Code
package com.smartag.bird.dev;
public class MainActivity extends Activity {
static String ndefMsg = null;
static String ndefMsg1 = null;
NfcAdapter mNfcAdapter;
PendingIntent mNfcPendingIntent;
IntentFilter[] mNdefExchangeFilters;
static final String TAG = "Read Tag";
TextView mTitle;
private static ImageView imageView;
static String url = "http://sposter.smartag.my/images/chicken_soup.jpg";
private static Bitmap downloadBitmap;
private static BitmapDrawable bitmapDrawable;
private static boolean largerImg = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
mNfcPendingIntent = PendingIntent.getActivity(this, 0,
new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
IntentFilter ndefDetected = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
try {
ndefDetected.addDataType("text/plain");
} catch (MalformedMimeTypeException e) { }
mNdefExchangeFilters = new IntentFilter[] { ndefDetected };
if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) {
NdefMessage[] messages = getNdefMessages(getIntent());
byte[] payload = messages[0].getRecords()[0].getPayload();
ndefMsg = new String(payload);
setIntent(new Intent()); // Consume this intent.
}
ConnectivityManager connManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if(ndefMsg == null || ndefMsg.length() == 0)
{
startActivity(new Intent(MainActivity.this, MainMenu.class));
}
else
{
setContentView(R.layout.main);
if (mWifi.isConnected()) {
ndefMsg1 = ndefMsg;
new DownloadFilesTask().execute();
ndefMsg = null;
}
else
{
AlertDialog.Builder dialog = new AlertDialog.Builder(this);
dialog.setTitle("Attention");
dialog.setMessage("No Internet Connection. Please enable the wifi.");
dialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton)
{
}
});
dialog.show();
}
}
}
private class DownloadFilesTask extends AsyncTask<Void, Void, Void> {
protected void onPostExecute(Void result) {
}
@Override
protected Void doInBackground(Void... params) {
try {
URL myFileUrl = new URL("http://sposter.smartag.my/images/chicken_soup.jpg");
HttpURLConnection conn= (HttpURLConnection)myFileUrl.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream is = conn.getInputStream();
downloadBitmap = BitmapFactory.decodeStream(is);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
ImageView image = (ImageView) findViewById(R.id.imview);
image.setImageBitmap(downloadBitmap);
return null;
}
}
}
