Android(安卓)URL访问网络资源，通过URL加载网络图片

AndroidManifest.xml

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

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="shortcut.song.com.myapplication.UrlTestActivity">    <ImageView        android:id="@+id/url_show"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />LinearLayout>

package shortcut.song.com.myapplication;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Handler;import android.os.Message;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.ImageView;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.MalformedURLException;import java.net.URL;public class UrlTestActivity extends AppCompatActivity {    ImageView imageView;    Bitmap bitmap;   Handler handler = new Handler(){       @Override       public void handleMessage(Message msg) {           super.handleMessage(msg);           if (msg.what == 0x1234) {               imageView.setImageBitmap(bitmap);           }       }   };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_url_test);        imageView = (ImageView)findViewById(R.id.url_show);        new Thread(){            @Override            public void run() {                super.run();                try {                    // 定义一个URL对象                    URL url = new URL("http://192.168.8.27/files/JPG/9.jpg");                    // 打开该URL对应的资源输入流                    InputStream is = url.openStream();                    // 从InputStream中解析出图片                    bitmap = BitmapFactory.decodeStream(is);                    // 发送消息，通知UI组件加载图片                    handler.sendEmptyMessage(0x1234);                    is.close();                    // 再次打开该URL对应的资源输入流                    is = url.openStream();                    // 打开文件对应的输出流                    OutputStream os = openFileOutput("9.jpg", MODE_PRIVATE);                    byte[] buff = new byte[1024];                    int hasRead = 0;                    // 将URL对应的资源下载到本地                    while ((hasRead = is.read(buff)) > 0){                        os.write(buff, 0, hasRead);                    }                    is.close();                    os.close();                } catch (MalformedURLException e) {                    e.printStackTrace();                } catch (IOException e) {                    e.printStackTrace();                }            }        }.start();    }}

AndroidManifest.xml

运行效果（通过URL加载的图片）：

更多相关文章

随机推荐