Android downloads images via URLs and enables fragment to interact with activity's images

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/56/BD/wKiom1SL18DS-xfoAAB0b2g3jvk579.jpg "title=" All.jpg "alt=" Wkiom1sl18ds-xfoaab0b2g3jvk579.jpg "/>

Added image zoom in and out, with a total of three classes. Mainactivity is used only as an add-fragment, with all its code such as:

Package com.example.ex_1213_mypic;

Import Android.os.Bundle;

Import android.support.v4.app.FragmentActivity;

Import Android.support.v4.app.FragmentManager;

Import android.support.v4.app.FragmentTransaction;

Import Android.view.Menu;

public class Mainactivity extends Fragmentactivity {

@Override

protected void OnCreate (Bundle savedinstancestate) {

Super.oncreate (savedinstancestate);

Setcontentview (R.layout.activity_main);

Addfragment ();//Add Fragment

}

private void Addfragment () {

Fragmentmanager fm = Getsupportfragmentmanager ();

Fragmenttransaction ft = fm.begintransaction ();

Myfragment myfragment = new Myfragment ();

Ft.add (R.id.fl_replace, myfragment);

Ft.commit ();

}

@Override

public boolean Oncreateoptionsmenu (Menu menu) {

Inflate the menu; This adds items to the action bar if it is present.

Getmenuinflater (). Inflate (R.menu.main, menu);

return true;

}

}

Mainactivity add fragment on the winter vacation.

Add two default images to the fragment XML first:

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/56/BD/wKiom1SL2gfwqftkAABY6LAm_sE175.jpg "title=" Xml.jpg "alt=" Wkiom1sl2gfwqftkaaby6lam_se175.jpg "/>

Get the desired image address and perform the download via Asynctask, put the downloaded picture into the declared bitmaplist, and then initialize the control after the download is complete:

Package com.example.ex_1213_mypic;

Import java.io.IOException;

Import Java.io.InputStream;

Import java.net.HttpURLConnection;

Import java.net.MalformedURLException;

Import Java.net.URL;

Import java.util.ArrayList;

Import android.content.Intent;

Import Android.graphics.Bitmap;

Import Android.graphics.BitmapFactory;

Import Android.os.AsyncTask;

Import Android.os.Bundle;

Import android.support.v4.app.Fragment;

Import Android.view.LayoutInflater;

Import Android.view.View;

Import Android.view.View.OnClickListener;

Import Android.view.ViewGroup;

Import Android.widget.ImageView;

public class Myfragment extends Fragment implements onclicklistener{

String [] urllist = {

"Http://7qn7nu.com1.z0.glb.clouddn.com/77.jpg",

"Http://7qn7nu.com1.z0.glb.clouddn.com/u=3516622004,3632540994&fm=59.jpg"

};

Private View layout;

arraylist<bitmap> bitmaplist = new arraylist<bitmap> ();

Public Myfragment () {

Required empty Public constructor

}

@Override

Public View Oncreateview (layoutinflater inflater, ViewGroup container,

Bundle savedinstancestate) {

if (layout = = null) {

Layout = Getactivity (). Getlayoutinflater (). Inflate (r.layout.fragment_my, NULL);

Initbitmap ();//Download picture

}else{

ViewGroup parent = (ViewGroup) layout.getparent ();

Parent.removeview (layout);

}

return layout;

}

private int index;

private void Initbitmap () {

Myasync Myasync = new Myasync ();

if (Index < 2) {

Download image

Myasync.execute (Urllist[index]);

}else{

Initview ();//Initialize Control

}

}

Asynctask Download Process:

Class Myasync extends Asynctask<string, Void, bitmap>{

@Override

Protected Bitmap doinbackground (String ... params) {

URL url;

Bitmap Bitmap = null;

try {

url = new URL (params[0]);

urlconnection con=url.openconnection ();

HttpURLConnection con= (httpurlconnection) url.openconnection ();

Con.setdoinput (TRUE);

Con.connect ();

InputStream Is=con.getinputstream ();

Bitmap=bitmapfactory.decodestream (IS);

Is.close ();

} catch (Malformedurlexception e) {

TODO auto-generated Catch block

E.printstacktrace ();

}catch (IOException e) {

TODO auto-generated Catch block

E.printstacktrace ();

}

return bitmap;

}

@Override

protected void OnPostExecute (Bitmap Bitmap) {

TODO auto-generated Method Stub

Super.onpostexecute (bitmap);

if (bitmap! = null) {

if (Index < 2) {

Bitmaplist.add (bitmap);

index++;

Initbitmap ();

}

}

}

}

Display the downloaded bitmap to the control:

private void Initview () {

ImageView img1 = (ImageView) Layout.findviewbyid (R.ID.IMAGEVIEW1);

ImageView Img2 = (ImageView) Layout.findviewbyid (R.ID.IMAGEVIEW2);

Img1.setimagebitmap (bitmaplist.get (0));

Img2.setimagebitmap (Bitmaplist.get (1));

Img1.setonclicklistener (this);

Img2.setonclicklistener (this);

}

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/56/BB/wKioL1SL3gfjkooIAAKDgPFhYkw007.jpg "title=" After download. jpg "alt=" wkiol1sl3gfjkooiaakdgpfhykw007.jpg "/>

This way you can display the pictures on the network to the app, and remember to add the permissions:

<uses-permission android:name= "Android.permission.INTERNET"/>

Finally, the fragment pictures were uploaded to Mytouchactivity. First write a method in mytouchactivity to receive the image:

public void Getbitmapinfo (Bitmap Bitmap, int position) {

This.bitmap = bitmap;

This.position = position;

}

To perform a click event on a picture, first new out the Mytouchactivity object and invokes the method written above to pass in the picture:

Outgoing images to mytouchactivity, while jumping from current activity to mytouchactivity

private void Initclickbitmap (int x) {

Intent Intent = new Intent ();

Mytouchactivity touchactivity = new mytouchactivity ();

if (Bitmaplist.size () > x) {

Touchactivity.getbitmapinfo (Bitmaplist.get (x), x);

Intent.setclass (Getactivity (), mytouchactivity.class);

StartActivity (Intent);

}

}

@Override

public void OnClick (View v) {

Switch (V.getid ()) {

Case R.ID.IMAGEVIEW1:

Initclickbitmap (0);

Break

Case R.ID.IMAGEVIEW2:

Initclickbitmap (1);

Break

Default

Break

}

}

The received bitmap will be displayed in the MyTouch.

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/56/BD/wKiom1SL37Kwa4rcAANtQ80A83Q791.jpg "title=" Click After. jpg "alt=" wkiom1sl37kwa4rcaantq80a83q791.jpg "/>

650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/56/BB/wKioL1SL4SLyXctZAAOiNfgpIiU895.jpg "title=" phone. jpg "alt=" Wkiol1sl4slyxctzaaoinfgpiiu895.jpg "/>

Simple to write an example, for the needs of friends reference, Novice on the road, the shortcomings please the Heroes Haihan and more advice ha ~

This article is from "broken Childe's pseudo technology blog" blog, please be sure to keep this source http://pogongzi.blog.51cto.com/8982426/1589568

Android downloads images via URLs and enables fragment to interact with activity's images