Android实现加载网络端图片

超、凢脫俗 2022-08-02 00:22 214阅读 0赞

**要获取网络上的图片，首先得有网络的访问权限，需要在AndroidManifest中添加相应权限，效果图：**

![Center][]

**布局文件如下：**

**功能代码：**

import org.apache.http.Header;
    
    import android.app.Activity;
    import android.graphics.Bitmap;
    import android.graphics.BitmapFactory;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.EditText;
    import android.widget.ImageView;
    import android.widget.Toast;
    
    import com.loopj.android.http.AsyncHttpClient;
    import com.loopj.android.http.AsyncHttpResponseHandler;
    
    public class MainActivity extends Activity {
    
    	private EditText et_url;
    	private ImageView iv_img;
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    		et_url=(EditText) findViewById(R.id.et_url);
    		iv_img=(ImageView) findViewById(R.id.iv_img);
    	}
    	
    	public void sendGetImg(View v){
    		int id=v.getId();
    		switch(id){
    		case R.id.btn_img:
    			//获取网络路径
    			String url=et_url.getText().toString();
    			//创建客户端对象 
    			AsyncHttpClient client=new AsyncHttpClient();
    			client.get(url, new AsyncHttpResponseHandler(){
    				@Override
    				public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
    					if(statusCode==200){
    						BitmapFactory factory=new BitmapFactory();
    						Bitmap bitmap=factory.decodeByteArray(responseBody, 0, responseBody.length);
    						iv_img.setImageBitmap(bitmap);
    					}
    				}
    				
    				@Override
    				public void onFailure(int statusCode, Header[] headers,
    						byte[] responseBody, Throwable error) {
    					error.printStackTrace();
    				}
    			});
    			break;
    		default:
    			break;
    		}
    	}
    }

[Center]: /images/20220731/d21e2e01659d4c84b58f2f977a6b3562.png