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 stackoverflow. 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 pipe05-05 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)
So please why is that happening and how can I fix that? How can I convert url to bitmap?
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;
}
}
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.
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!
try put your code in a Thread.
And I think, you can use a WebView to display Url Image:
webView.loadUrl(urlImage)
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();
}
}
}
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;