Android实现网页图片浏览功能

2024-02-22 17:44:03 54

packagecn.edu.bzu.imageview; importandroid.app.Activity; importandroid.graphics.Bitmap; importandroid.graphics.BitmapFactory; importandroid.os.Bundle; importandroid.os.Handler; importandroid.os.Message; importandroid.text.TextUtils; importandroid.view.View; importandroid.widget.EditText; importandroid.widget.ImageView; importandroid.widget.Toast; importjava.io.InputStream; importjava.net.HttpURLConnection; importjava.net.MalformedURLException; importjava.net.URL; publicclassMainActivityextendsActivity{ protectedstaticfinalintCHANGE_UI=1; protectedstaticfinalintERROR=2; privateEditTextet_path; privateImageViewiv; privateHandlerhandler=newHandler(){ publicvoidhandleMessage(Messagemsg){ if(msg.what==CHANGE_UI){ Bitmapbitmap=(Bitmap)msg.obj; iv.setImageBitmap(bitmap); }elseif(msg.what==ERROR){ Toast.makeText(MainActivity.this,"显示图片错误",Toast.LENGTH_SHORT).show(); } } ; }; @Override protectedvoidonCreate(BundlesavedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_path=(EditText)findViewById(R.id.et_path); iv=(ImageView)findViewById(R.id.iv); } publicvoidclick(Viewview){ finalStringpath=et_path.getText().toString().trim(); if(TextUtils.isEmpty(path)){ Toast.makeText(this,"图片路径不能为空",Toast.LENGTH_SHORT).show(); }else{ //子线程请求网络，android4.0以后访问网络不能放在主线程中 newThread(){ privateHttpURLConnectionconn; privateBitmapbitmap; publicvoidrun(){//连接服务器get请求，获取图片 //创建URL对象 try{ URLurl=newURL(path); conn=(HttpURLConnection)url.openConnection();//根据url发送http的请求 conn.setRequestMethod("GET");//设置请求的方式 conn.setConnectTimeout(5000);//设置超时时间 conn.setRequestProperty("User-Agent","Mozilla/4.0(compatible;MSIE6.0;WindowsNT5.1;"+"SV1;.NET4.0C;.NET4.0E;.NETCLR2.0.50727;"+".NETCLR3.0.4506.2152;.NETCLR3.5.30729;Shuame)");//设置浏览器的版本 intcode=conn.getResponseCode();//得到服务器返回的响应码 if(code==200){//请求成功后返回码是200 InputStreamis=conn.getInputStream(); bitmap=BitmapFactory.decodeStream(is); Messagemsg=newMessage(); msg.what=CHANGE_UI; msg.obj=bitmap; handler.sendMessage(msg); }else{ Messagemsg=newMessage(); msg.what=ERROR; handler.sendMessage(msg); } }catch(java.io.IOExceptione){ e.printStackTrace(); Messagemsg=newMessage(); msg.what=ERROR; handler.sendMessage(msg); } } }.start(); } }

Android实现网页图片浏览功能

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