Android网络图片查看器

网络图片查看器



布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="图片路径" />

<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="http://172.16.121.10:8080/BookStore2/xxx.jpg"
android:id="@+id/imagePath"
/>

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="确定"
android:id="@+id/button"
/>

<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageViewID"
/>
</LinearLayout>

MainActivity文件
public class MainActivity extends Activity {

private EditText imagePath;
private ImageView imageView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imagePath = (EditText) this.findViewById(R.id.imagePath);
imageView = (ImageView) this.findViewById(R.id.imageViewID);

Button button = (Button) this.findViewById(R.id.button);
button.setOnClickListener(new Button_OnclickLinstner());

}

private final class Button_OnclickLinstner implements View.OnClickListener{
@Override
public void onClick(View v) {
String path = imagePath.getText().toString();
byte[] data;
try {
data = ImageService.getImage(path);
Bitmap bitMap = BitmapFactory.decodeByteArray(data, 0, data.length);//图片二进制数据构建位图
imageView.setImageBitmap(bitMap); //显示图片
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "图片获取失败", 1).show();
e.printStackTrace();
}

}

} }


//获取图片业务类
public static byte[] getImage(String path) throws Exception {

URL url = new URL(path);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();<span style="white-space:pre"> </span>//获得链接
connection.setRequestMethod("GET");
connection.setConnectTimeout(5000);<span style="white-space:pre"> </span>
if(connection.getResponseCode() == 200){
InputStream in = connection.getInputStream();
return StreamTool.read(in);
}
return null;
}


//读取二进制数据工具类

public static byte[] read(InputStream in) throws Exception {

ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0 ;

while((len = in.read(buffer)) != -1){
out.write(buffer, 0, len);
}
in.close();

return out.toByteArray();
}