本文实例讲述了Android编程实现网络图片查看器和网页源码查看器。分享给大家供大家参考,具体如下:
网络图片查看器清单文加入网络访问权限:
<!-- 访问internet权限 --><uses-permission android:name="android.permission.INTERNET"/>
界面如下:

示例:
public class MainActivity extends Activity {private EditText imagepath;private ImageView imageView;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);imagepath = (EditText) this.findViewById(R.id.imagepath);imageView = (ImageView) this.findViewById(R.id.imageView);Button button = (Button) this.findViewById(R.id.button);button.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {String path = imagepath.getText().toString();try{byte[] data = ImageService.getImage(path);//获取图片数据if(data!=null){//构建位图对象Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);imageView.setImageBitmap(bitmap);//显示图片}else{Toast.makeText(getApplicationContext(), R.string.error, 1).show();}}catch (Exception e) {Toast.makeText(getApplicationContext(), R.string.error, 1).show();}}});}}
public class ImageService {/** * 获取图片 * @param path 网络图片路径 * @return 图片的字节数据 */public static byte[] getImage(String path) throws Exception{URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection();//设置超时时间conn.setConnectTimeout(5000);conn.setRequestMethod("GET");if(conn.getResponseCode()==200){InputStream inStream = conn.getInputStream();byte[] data = StreamTool.read(inStream);return data;}return null;}}
public class StreamTool {/** * 读取输入流数据 * @param inStream * @return */public static byte[] read(InputStream inStream) throws Exception{ByteArrayOutputStream outStream = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len = 0;while( (len = inStream.read(buffer)) != -1 ){outStream.write(buffer, 0, len);}inStream.close();return outStream.toByteArray();}}
网页源码查看器如果网页的源码超过屏幕的显示位置的话,要求出现滚动条.
<ScrollView android:layout_width="wrap_content" android:layout_height="wrap_content"><TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/htmlsource" /></ScrollView>
界面如下:

示例
@Overridepublic void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); pathText = (EditText) this.findViewById(R.id.path); htmlsource = (TextView) this.findViewById(R.id.htmlsource); Button button = (Button) this.findViewById(R.id.button); button.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {String path = pathText.getText().toString();try{//获取源码String html = PageService.getHtml(path);htmlsource.setText(html);}catch (Exception e) {Toast.makeText(getApplicationContext(), R.string.error, 1).show();}}});}
public class PageService {/** * 获取网页源代码 * @param path 网页路径 * @return */public static String getHtml(String path) throws Exception{URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setConnectTimeout(5000);conn.setRequestMethod("GET");if(conn.getResponseCode() == 200){byte[] data = StreamTool.read(conn.getInputStream());return new String(data, "UTF-8");}return null;}}
希望本文所述对大家Android程序设计有所帮助。