23_传智播客Android视频教程_网络通信之网络图片查看器
16lz
2021-01-23
布局文件：
<?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" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="网络图片的地址是：\n 这个可以自定在输入框里面输入，但是为了简便，直接使用TextView做了" /> <Button android:id="@+id/Button01" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:text="得到网络图片" /> <ImageView android:id="@+id/imageView01" android:layout_width="wrap_content" android:layout_height="wrap_content" /></LinearLayout>
MainActivity：
public class MainActivity extends Activity {private Button Button01;private ImageView imageView01;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button01 = (Button) findViewById(R.id.Button01);imageView01 = (ImageView) findViewById(R.id.imageView01);Button01.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {String path = "http://111.114.116.236:8080/Test/image/Test.jpg";try {byte[] data = ImageService.getImageByByte(path);Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,data.length);imageView01.setImageBitmap(bitmap);} catch (Exception e) {e.printStackTrace();}}});}} ImageService：
public class ImageService {public static byte[] getImageByByte(String path) throws Exception {ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();URL url = new URL(path);// HttpClientConnection 是对HttpURLConnection的封装，不建议使用/*HttpsURLConnection与HttpURLConnection就是http与https的区别 * */HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();httpURLConnection.setConnectTimeout(5000);httpURLConnection.setRequestMethod("GET");if (httpURLConnection.getResponseCode() == 200) {InputStream inputStream = httpURLConnection.getInputStream();byte[] buffer = new byte[1024];int len = 0;// 读到buffer中间while ((len = inputStream.read(buffer)) != -1) {// 从buffer中读数据byteArrayOutputStream.write(buffer, 0, len);}inputStream.close();}return byteArrayOutputStream.toByteArray();}} 更多相关文章
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