okhttp上傳下載圖片
阿新 • • 發佈:2018-12-21
public class MainActivity extends AppCompatActivity {
private String Path = "https://10.url.cn/eth/ajNVdqHZLLAxibwnrOxXSzIxA76ichutwMCcOpA45xjiapneMZsib7eY4wUxF6XDmL2FmZEVYsf86iaw/"; private static final int SUCCESS = 993; private static final int FALL = 814; Handler handler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { //載入網路成功,進行UI的更新,處理得到的圖片資源 case SUCCESS: //通過message,拿到位元組陣列 byte[] Picture = (byte[]) msg.obj; //使用BitmapFactory工廠,把位元組陣列轉換為bitmap Bitmap bitmap = BitmapFactory.decodeByteArray(Picture, 0, Picture.length); //通過ImageView,設定圖片 mImageView_okhttp.setImageBitmap(bitmap); break; //當載入網路失敗,執行的邏輯程式碼 case FALL: Toast.makeText(MainActivity.this, "不好意思,李紅展太帥了,造成網路異常", Toast.LENGTH_SHORT).show(); break; default: break; } } }; private ImageView mImageView_okhttp; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //初始化控制元件 initView(); } private void initView() { mImageView_okhttp = (ImageView) findViewById(R.id.imageView_okhttp); } /** * 根據點選事件獲取絡上的圖片資源,使用的是OKhttp框架 * * @param view */ public void Picture_okhttp_bt(View view) { //1. 建立OKhttpClient物件 OkHttpClient okHttpClient = new OkHttpClient(); //2.建立Request物件,設定引數,請求方式如果是get,就不用設定,預設使用的就是get Request request = new Request.Builder() .url(Path)//設定請求網址 .build();//建立request物件 //3.建立一個Call物件,引數是request物件,傳送請求 Call call = okHttpClient.newCall(request); //4.非同步請求,請求加入排程 call.enqueue(new Callback() { @Override//請求失敗回撥 public void onFailure(Call call, IOException e) { handler.sendEmptyMessage(FALL); } @Override//請求成功回撥 public void onResponse(Call call, Response response) throws IOException { //得到從網上獲取資源,轉換成我們想要的型別 byte[] Picture_bt = response.body().bytes(); //通過handler更新UI Message message = handler.obtainMessage(); message.obj = Picture_bt; message.what = SUCCESS; handler.sendMessage(message); } }); } //當按鈕點選時,執行使用OKhttp上傳圖片到伺服器(http://blog.csdn.net/tangxl2008008/article/details/51777355) //注意:有時候上傳圖片失敗,是伺服器規定還要上傳一個Key,如果開發中關於網路這一塊出現問題,就多和麵試官溝通溝通 public void uploading(View view) { //圖片上傳介面地址 String url = "https://www.718shop.com/sell/sell.m.picture.upload.do"; //建立上傳檔案物件 File file = new File(Environment.getExternalStorageDirectory(), "big.jpg"); //建立RequestBody封裝引數 RequestBody fileBody = RequestBody.create(MediaType.parse("application/octet-stream"), file); //建立MultipartBody,給RequestBody進行設定 MultipartBody multipartBody = new MultipartBody.Builder() .setType(MultipartBody.FORM) .addFormDataPart("image", "big.jpg", fileBody) .build(); //建立Request Request request = new Request.Builder() .url(url) .post(multipartBody) .build(); //建立okhttp物件 OkHttpClient okHttpClient = new OkHttpClient.Builder() .connectTimeout(10, TimeUnit.SECONDS) .readTimeout(10, TimeUnit.SECONDS) .writeTimeout(10, TimeUnit.SECONDS) .build(); //上傳完圖片,得到伺服器反饋資料 okHttpClient.newCall(request).enqueue(new Callback() { @Override public void onFailure(Call call, IOException e) { Log.e("hao", "uploadMultiFile() e=" + e); } @Override public void onResponse(Call call, Response response) throws IOException { Log.i("hao", "成功了=" + response.body().string()); } }); }
}