How to display Network Pictures in Android
This article mainly introduces "how to display network pictures in Android". In daily operation, I believe many people have doubts about how to display network pictures in Android. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "how to display network pictures in Android". Next, please follow the editor to study!
Android displays network pictures Step1:
1. Create your Activity, which is illustrated with ViewWebImageActivity in this example
2. The code in ViewWebImageActivity is as follows:
String imageUrl = "https://cache.yisu.com/upload/ask_collection/20210725/111/121401.jpg";
/ / this is the online picture you need to display-anything you can find online.
Bitmap bmImg
ImageView imView
Button button1
@ Override
Public void onCreate (Bundle savedInstanceState) {
Super.onCreate (savedInstanceState)
SetContentView (R.layout.main)
ImView = (ImageView) findViewById (R.id.imview)
ImView.setImageBitmap (returnBitMap (imageUrl))
}
Public Bitmap returnBitMap (String url) {
URL myFileUrl = null
Bitmap bitmap = null
Try {
MyFileUrl = new URL (url)
} catch (MalformedURLException e) {
E.printStackTrace ()
}
Try {
HttpURLConnection conn = (HttpURLConnection)
MyFileUrl.openConnection ()
Conn.setDoInput (true)
Conn.connect ()
InputStream is = conn.getInputStream ()
Bitmap = BitmapFactory.decodeStream (is)
Is.close ()
} catch (IOException e) {
E.printStackTrace ()
}
Return bitmap
}
3. Among them, the returnBitMap (String url) method is to realize the conversion of network pictures into bitmap.
Android displays network pictures Step2:
1. Modify your main.xml file as follows:
< ?xml version="1.0" encoding="utf-8"?> < LinearLayout xmlns:android= "http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > < ImageView android:id="@+id/imview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" /> < /LinearLayout>Android displays network pictures Step3:
In your AndroidManifest.xml file
< /manifest>Add above the node
< uses-permission android:name="android.permission.INTERNET" />This is because Android has a lot of permission restrictions, otherwise the picture cannot be displayed on your simulator.
At this point, the study on "how to display network pictures in Android" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!
