Question

我试图每隔几秒调用一次api路由（方法）。当前调用路径的方法获取base64字符串，并将字符串作为Image放在我的imageview上。我怎样才能每隔X秒不断调用一次。

目前该方法如下所示：

public void getImageFromApi() {
    call = service.getStreamBase64(Utils.getApplicationname(), Utils.getStreamname());
    call.enqueue(new retrofit2.Callback<ResponseBody>() {
        @Override
        public void onResponse(Call<ResponseBody> call, retrofit2.Response<ResponseBody> response) {
            if (response.isSuccessful()) {
                try {
                    Log.e("Tag", response.body().string() + " ");
                    String result = response.body().string(); // holds the base64 string
                    byte[] decodedString = Base64.decode(result, Base64.DEFAULT);
                    Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);

                    // Make the imageview visible inside the relative layout, it is GONE inside the xml ...
                    RelativeLayout drawable = (RelativeLayout) findViewById(R.id.drawable);
                    drawable.setVisibility(View.VISIBLE);

                    drawable1.setImageBitmap(decodedByte); // put image on imageview
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } else {
                if (response.code() == 404) {
                    Toasty.error(VideoChatActivity.this, "Error Code " + response.code() + ": Cannot not access the API!", Toast.LENGTH_SHORT, true).show();
                }                 }
        }

        @Override
        public void onFailure(Call<ResponseBody> call, Throwable t) {
            Toasty.error(VideoChatActivity.this, "Error.", Toast.LENGTH_SHORT, true).show();
        }
    });
}

我需要每隔X秒调用一次，以便图像更新。

Answer 1

试试这个

声明Timer全球

Timer timer;

在onCreate()方法

中添加此代码

timer = new Timer();
timer.scheduleAtFixedRate(new RemindTask(), 0, 3000); // delay in seconds

创建一个像这样的新类

private class RemindTask extends TimerTask {


        @Override
        public void run() {
            runOnUiThread(new Runnable() {
                public void run() {

                    // call your method here

                   getImageFromApi();
                }
            });

        }
    }

Answer 2

您可以将android Handler用于此目的

handler.postDelayed(handlerTask, 1000);

在handlerTaskexecuted再次调用之后

Answer 3

在 onCreate（）; 中通过此代码，它将每10秒调用 getImageFromApi（）

 long SECOND_IN_MILLI = 10000//10 seconds
     final Handler timerHandler = new Handler();
                                     final Runnable timerRunnable = new Runnable() {
                                         @Override
                                         public void run() {
                                             getImageFromApi();
                                            timerHandler.postDelayed(this, SECOND_IN_MILLI);
                                         }
                                     };
                                     timerHandler.postDelayed(timerRunnable, SECOND_IN_MILLI);

Android呼叫api路由每隔几秒钟

3 个答案: