Android實現網絡圖片查看器和網頁源碼查看器

網絡圖片查看器

清單文加入網絡訪問權限：

1. |<!-- 訪問internet權限 -->
2. <uses-permission Android:name="android.permission.INTERNET"/>

界面如下：

示例：

1. public class MainActivity extends Activity {
2. private EditText imagepath;
3. private ImageView imageView;
4. @Override
5. public void onCreate(Bundle savedInstanceState) {
6. super.onCreate(savedInstanceState);
7. setContentView(R.layout.main);
9. imagepath = (EditText) this.findViewById(R.id.imagepath);
10. imageView = (ImageView) this.findViewById(R.id.imageView);
12. Button button = (Button) this.findViewById(R.id.button);
13. button.setOnClickListener(new View.OnClickListener() {
14. public void onClick(View v) {
15. String path = imagepath.getText().toString();
16. try{
17. byte[] data = ImageService.getImage(path);//獲取圖片數據
18. if(data!=null){
19. //構建位圖對象
20. Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
21. imageView.setImageBitmap(bitmap);//顯示圖片
22. }else{
23. Toast.makeText(getApplicationContext(), R.string.error, 1).show();
24. }
25. }catch (Exception e) {
26. Toast.makeText(getApplicationContext(), R.string.error, 1).show();
27. }
28. }
29. });
30. }
31. }

1. public class ImageService {
2. /**
3. * 獲取圖片
4. * @param path 網絡圖片路徑
5. * @return 圖片的字節數據
6. */
7. public static byte[] getImage(String path) throws Exception{
8. URL url = new URL(path);
9. HttpURLConnection conn = (HttpURLConnection) url.openConnection();
10. //設置超時時間
11. conn.setConnectTimeout(5000);
12. conn.setRequestMethod("GET");
13. if(conn.getResponseCode()==200){
14. InputStream inStream = conn.getInputStream();
15. byte[] data = StreamTool.read(inStream);
16. return data;
17. }
18. return null;
19. }
20. }

1. <span style="FONT-WEIGHT: normal">public class StreamTool {
2. /**
3. * 讀取輸入流數據
4. * @param inStream
5. * @return
6. */
7. public static byte[] read(InputStream inStream) throws Exception{
8. ByteArrayOutputStream outStream = new ByteArrayOutputStream();
9. byte[] buffer = new byte[1024];
10. int len = 0;
11. while( (len = inStream.read(buffer)) != -1 ){
12. outStream.write(buffer, 0, len);
13. }
14. inStream.close();
15. return outStream.toByteArray();
16. }
17. }