Android实现网络图片查看器和网页源码查看器

 

推荐安卓开发神器（里面有各种UI特效和android代码库实例）

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：

 

<span style="FONT-WEIGHT: normal">public class MainActivity extends Activity {
    private EditText imagepath;
    private ImageView imageView;
    @Override
    public 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();
                }
            }
        });
    }
}</span>

<span style="FONT-WEIGHT: normal">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;
    }
}</span>

<span style="FONT-WEIGHT: normal">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();
    }
}</span>

 

 

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

 

  @Override
  public 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;
    }
}