查询网络图片

 1 <ImageView  
 2         android:id="@+id/iv_img"  
 3         android:layout_width="wrap_content"  
 4         android:layout_height="300dp"  
 5         android:layout_alignParentLeft="true"  
 6         android:layout_alignParentRight="true"  
 7         android:layout_alignParentTop="true"  
 8         android:src="@drawable/ic_launcher" />  
 9   
10     <EditText  
11         android:id="@+id/et_url"  
12         android:layout_width="match_parent"  
13         android:layout_height="wrap_content"  
14         android:layout_alignParentBottom="true"  
15         android:layout_alignParentLeft="true"  
16         android:layout_marginBottom="60dp"  
17         android:inputType="textUri"  
18         android:text="@string/et_url"/>  
19   
20     <Button  
21         android:id="@+id/btn_img"  
22         android:layout_width="match_parent"  
23         android:layout_height="wrap_content"  
24         android:layout_alignParentBottom="true"  
25         android:layout_alignParentLeft="true"  
26         android:onClick="sendGetImg"  
27         android:text="@string/btn_img" />  
28   

 1 public class MainActivity extends Activity {  
 2   
 3     private EditText et_url;  
 4     private ImageView iv_img;  
 5     @Override  
 6     protected void onCreate(Bundle savedInstanceState) {  
 7         super.onCreate(savedInstanceState);  
 8         setContentView(R.layout.activity_main);  
 9         et_url=(EditText) findViewById(R.id.et_url);  
10         iv_img=(ImageView) findViewById(R.id.iv_img);  
11     }  
12       
13     public void sendGetImg(View v){  
14         int id=v.getId();  
15         switch(id){  
16         case R.id.btn_img:  
17             //获取网络路径  
18             String url=et_url.getText().toString();  
19             //创建客户端对象   
20             AsyncHttpClient client=new AsyncHttpClient();  
21             client.get(url, new AsyncHttpResponseHandler(){  
22                 @Override  
23                 public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {  
24                     if(statusCode==200){  
25                         BitmapFactory factory=new BitmapFactory();  
26                         Bitmap bitmap=factory.decodeByteArray(responseBody, 0, responseBody.length);  
27                         iv_img.setImageBitmap(bitmap);  
28                     }  
29                 }  
30                   
31                 @Override  
32                 public void onFailure(int statusCode, Header[] headers,  
33                         byte[] responseBody, Throwable error) {  
34                     error.printStackTrace();  
35                 }  
36             });  
37             break;  
38         default:  
39             break;  
40         }  
41     }  
42 }