android:ImageView,訪問網上圖片並顯示出來

android:ImageView,訪問網片並顯示出來

package com.example.utils;import java.io.ByteArrayOutputStream;import java.io.InputStream;public class StreamTool {public static byte[] readInputStream(InputStream inStream) throws Exception {ByteArrayOutputStream outStream = new ByteArrayOutputStream();// 輸出資料流，寫到記憶體byte[] buffer = new byte[1024];// 1K緩衝區容量int len = 0;while ((len = inStream.read(buffer)) != -1) {outStream.write(buffer, 0, len);// 從數組buffer中讀取從0到len的資料}inStream.close();return outStream.toByteArray();}}

package com.example.image;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import com.example.utils.StreamTool;public class ImageService {public static byte[] getImage(String path) throws Throwable {URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("GET");conn.setConnectTimeout(5 * 1000);InputStream inStream = conn.getInputStream();// 通過輸入資料流擷取圖片資料return StreamTool.readInputStream(inStream);// 得到的圖片的位元據}}

package com.example.image;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.ImageView;import android.widget.Toast;public class ImageActivity extends Activity {private static final String TAG = "ImageActivity";private EditText pathText;private ImageView imageView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_image);pathText = (EditText) this.findViewById(R.id.urlpath);imageView = (ImageView) this.findViewById(R.id.show);Button button = (Button) this.findViewById(R.id.button);button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {String path = pathText.getText().toString();try {byte[] data = ImageService.getImage(path);Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,data.length);imageView.setImageBitmap(bitmap);// 顯示圖片} catch (Throwable e) {Toast.makeText(ImageActivity.this, R.string.error, Toast.LENGTH_LONG).show();Log.e(TAG, e.toString());}}});}}// //