赵雅智_引用开源框架通过AsyncHttpClient实现网络图片查看器

来源：互联网发布：乐视视频网络未连接编辑：程序博客网时间：2024/05/01 07:50

步骤：

1.添加权限（访问网络权限）

2.创建异步请求对象

3.执行post请求（指定url路径，新建AsyncHttpResponseHandler方法）

a) 如果成功创建工厂对象

b) 工厂对象的decodeByteArray把字节转换成Bitmap对象

c) 设置图片

实例项目解析

项目要求：通过editText文本输入框中的网址，点击查看按钮，进行网络图片显示

运行效果如下：

重点代码：均有详细解析，请认真查看注释

1、在AndroidManifest.xml中添加权限

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

2、布局文件activity_main.xml

package com.example.photowatch;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 com.loopj.android.http.AsyncHttpClient;import com.loopj.android.http.AsyncHttpResponseHandler;public class MainActivity extends Activity {private EditText et_url;private ImageView img_info;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);// 获取控件对象et_url = (EditText) findViewById(R.id.et_url);img_info = (ImageView) findViewById(R.id.img_info);};public void show(View v) {int id = v.getId();switch (id) {case R.id.btn_show://请求地址String url = et_url.getText().toString();//创建网络请求对象AsyncHttpClient client= new AsyncHttpClient(); client.get(url, new AsyncHttpResponseHandler() {@Overridepublic void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {if (statusCode == 200) {//创建工厂对象BitmapFactory bitmapFactory = new BitmapFactory();//工厂对象的decodeByteArray把字节转换成Bitmap对象Bitmap bitmap = bitmapFactory.decodeByteArray(responseBody, 0, responseBody.length);//设置图片img_info.setImageBitmap(bitmap);}}@Overridepublic void onFailure(int statusCode, Header[] headers,byte[] responseBody, Throwable error) {error.printStackTrace();}});break;default:break;}}}

3、MainActivity.java

package com.example.photowatch;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 com.loopj.android.http.AsyncHttpClient;import com.loopj.android.http.AsyncHttpResponseHandler;public class MainActivity extends Activity {private EditText et_url;private ImageView img_info;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);// 获取控件对象et_url = (EditText) findViewById(R.id.et_url);img_info = (ImageView) findViewById(R.id.img_info);};public void show(View v) {int id = v.getId();switch (id) {case R.id.btn_show://请求地址String url = et_url.getText().toString();//创建网络请求对象AsyncHttpClient client= new AsyncHttpClient(); client.get(url, new AsyncHttpResponseHandler() {@Overridepublic void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {if (statusCode == 200) {//创建工厂对象BitmapFactory bitmapFactory = new BitmapFactory();//工厂对象的decodeByteArray把字节转换成Bitmap对象Bitmap bitmap = bitmapFactory.decodeByteArray(responseBody, 0, responseBody.length);//设置图片img_info.setImageBitmap(bitmap);}}@Overridepublic void onFailure(int statusCode, Header[] headers,byte[] responseBody, Throwable error) {error.printStackTrace();}});break;default:break;}}}

重点代码就是这些，自己动手查看一下效果吧！~

开源框架资源：http://download.csdn.net/detail/zhaoyazhi2129/7400787

源码：http://download.csdn.net/detail/zhaoyazhi2129/7400815

转发请标明原文地址 http://blog.csdn.net/zhaoyazhi2129/article/details/27048527

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