1.布局文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:orientation="vertical" android:layout_height="match_parent" tools:context=".MainActivity" > <ImageView android:id="@+id/iv_icon" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="1"/> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <EditText android:id="@+id/et_url" android:layout_height="wrap_content" android:layout_width="0dip" android:text="http://img0.bdstatic.com/img/image/shouye/dengni37.jpg" android:singleLine="true" android:layout_weight="1"/> <Button android:id="@+id/btn_submit" android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="Go"/> </LinearLayout> </LinearLayout>
2.主程序中实现
package com.wzw.netphoto; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import android.os.Bundle; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.ImageView; import android.widget.Toast; public class MainActivity extends Activity implements OnClickListener { private ImageView ivIcon; private EditText etUrl; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ivIcon = (ImageView) findViewById(R.id.iv_icon); etUrl = (EditText) findViewById(R.id.et_url); Button btn=(Button) findViewById(R.id.btn_submit); btn.setOnClickListener(this); } @Override public void onClick(View v) { String url=etUrl.getText().toString(); Bitmap bit=getImageFromNet(url); ivIcon.setImageBitmap(bit); } public Bitmap getImageFromNet(String url){ try { URL mUrl=new URL(url);//创建URL对象 HttpURLConnection conn = (HttpURLConnection) mUrl.openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(10000); //设置连接超时时间 conn.setReadTimeout(5000); //设置读取超时时间 conn.connect(); int responseCode = conn.getResponseCode(); if(responseCode==200){ InputStream is = conn.getInputStream(); Bitmap bitmap=BitmapFactory.decodeStream(is); Toast.makeText(this, "获取成功", 0).show(); return bitmap; } } catch (Exception e) { e.printStackTrace(); } return null; } }
3.添加网络访问权限
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.wzw.netphoto" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" />、 <!-- 添加访问网络的权限 --> <uses-permission android:name="android.permission.INTERNET"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.wzw.netphoto.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Android查看网络图片例子
时间: 2024-10-22 12:33:18