Android实现网络图片查看器和网页源码查看器

网络图片查看器

清单文加入网络访问权限：

[html] view
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|<!-- 访问internet权限 -->

<uses-permission android:name="android.permission.INTERNET"/>

界面如下：






示例：

[html] view
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<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>

[html] view
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<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>

[html] view
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<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.

[html] view
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<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

[html] view
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@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();

}

}

});

}

[html] view
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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;

}

}