android > ImageView 加载本地/服务器图片

先是布局 . xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <ImageView         android:id="@+id/image"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        />    </LinearLayout>

然后是一个加载本地 / 服务器图片的 class 里面有2 个方法一个加载本地的一个加载服务器的参数有URL

package b22.com;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;public class BitmapUtils {  /**     * 加载本地图片     * @param url     * @return     */      public static Bitmap getLoacalBitmapByAssets(Context c, String url)      {          Bitmap bitmap = null;          InputStream in = null;          try          {              in = c.getResources().getAssets().open(url);              bitmap = BitmapFactory.decodeStream(in);          }          catch (IOException e)          {              e.printStackTrace();          }          finally          {              closeStream(in, null);          }          return bitmap;      }        /**     * 从服务器取图片     * @param url     * @return     */      public static Bitmap getHttpBitmap(String url)      {          URL myFileUrl = null;          Bitmap bitmap = null;          InputStream in = null;          try          {              myFileUrl = new URL(url);              HttpURLConnection conn = (HttpURLConnection)myFileUrl.openConnection();              conn.setConnectTimeout(0);              conn.setDoInput(true);              conn.connect();              in = conn.getInputStream();              bitmap = BitmapFactory.decodeStream(in);          }          catch (IOException e)          {              e.printStackTrace();          }          finally          {              closeStream(in, null);          }          return bitmap;      }        /**       * 关闭输入输出流      * @param in      * @param out      */      public static void closeStream(InputStream in, OutputStream out)      {          try          {              if (null != in)              {                  in.close();              }              if (null != out)              {                  out.close();              }          }          catch (IOException e)          {              e.printStackTrace();          }      }  }

然后是主 activity 调用加载图片的 class 方法然后里面的图片根路径是 assets 文件夹

package b22.com;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.widget.ImageView;public class B22Activity extends Activity {    /** Called when the activity is first created. */private ImageView imageLayout;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                imageLayout = (ImageView)findViewById(R.id.image);                String imagePath = "rdt_right.png";                imageLayout.setImageBitmap(BitmapUtils.getLoacalBitmapByAssets(B22Activity.this, imagePath));                    }        }

更多相关文章

随机推荐