Android Network Picture View Display implementation method

As follows:

There are three controls in the interface, one edittext, one button, and one ImageView

1, the following is the specific layout file

< EditText 　　 android:id = "@+id/picturepagh" 　　 android:layout_width = "fill_parent" 　　 android:layout_height = "wrap_content" 　　 android:text = "@string/hello_world"  /> < Button 　　 android:id = "@+id/btn" 　　 android:layout_width = "fill_parent" 　　 android:layout_height = "wrap_content" 　　 android:text = "查看"  /> < ImageButton 　　 android:id = "@+id/imageView" 　　 android:layout_width = "fill_parent" 　　 android:layout_height = "200px"  /> 2, in mainactivity the picture diagram code writing public  class  MainActivity  extends  Activity { private  Button btn; private  EditText path; private  ImageView imgview; @Override protected  void  onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn = (Button) findViewById(R.id.btn); path = (EditText) findViewById(R.id.picturepagh); imgview = (ImageView) findViewById(R.id.imageView); btn.setOnClickListener( new  OnClickListener() { @Override public  void  onClick(View v) { Log.i( "CLICK" , ((Button) v).getText().toString()); new  Thread(runa).start(); } }); } public  void  setView() { String picturepath = path.getText().toString(); byte [] data =  null ; try  { data = ImageService.getImage(picturepath); Bitmap bitmap = BitmapFactory.decodeByteArray(data,  0 , data.length); // BitmapFactory：图片工厂！ Looper.prepare(); // 必须调用此方法，要不然会报错 Message msg =  new  Message(); msg.what =  0 ; msg.obj = bitmap; handler.sendMessage(msg); }  catch  (Exception e) { Toast.makeText(getApplicationContext(),  "获取图片错误" ,  1 ).show(); } } private  Handler handler =  new  Handler() { @Override public  void  handleMessage(Message msg) { if  (msg.what ==  0 ) { updateImageView((Bitmap) msg.obj); } } }; private  Runnable runa =  new  Runnable() { @Override public  void  run() { setView(); } }; private  void  updateImageView(Bitmap bm) { imgview.setImageBitmap(bm); } } 3, add a ImageService image service class, which contains a method to obtain network data; public  class  ImageService { // 获取网络图片的数据 public  static  byte [] getImage(String picturepath)  throws  Exception { URL url =  new  URL(picturepath); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); // 基于http协议的连接对象 conn.setConnectTimeout( 10 ); // 10秒； conn.setRequestMethod( "GET" ); // 大写 if  (conn.getResponseCode() ==  200 ) { InputStream ins = conn.getInputStream(); return  StreamTool.read(ins); } return  null ; } } 4. Add a stream processing work class Streamtool public  class  StreamTool { public  static  byte [] read(InputStream ins)  throws  Exception { ByteArrayOutputStream outstream =  new  ByteArrayOutputStream(); byte [] buffer =  new  byte [ 1024 ]; int  length =  0 ; while  ((length = ins.read(buffer)) > - 1 ) { outstream.write(buffer,  0 , length); } outstream.close(); return  outstream.toByteArray(); } }where this procedure is not appropriate, it needs to be modified.

Android Network Picture View Display implementation method