手機狀態更改時如何發送http請求？

Question

我正在偵聽PhoneStateListener上的更改，並且每次發生更改時都想發出一個url請求。 我將不勝感激。

我試圖擺弄下面的代碼沒有成功。 日志消息工作正常，但對Web服務器的請求不起作用。

private class PhoneCallListener extends PhoneStateListener{
    private boolean isPhoneCalling = false;

    @Override
    public void onCallStateChanged(int state, String incomingNumber) {
        if (TelephonyManager.CALL_STATE_RINGING == state)
        {
            // phone ringing
            Log.i("LOG_TAG", "RINGING, number: " + incomingNumber);
            try {
                URL url = new URL("http://example.com/log.php?state=Ringing");
                HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                urlConnection.disconnect();
            }
            catch (MalformedURLException ex) {
                Log.e("httptest",Log.getStackTraceString(ex));
            }
            catch (IOException ex) {
                Log.e("httptest",Log.getStackTraceString(ex));
            }

            Log.i("LOG_TAG", "RINGING, number: " + incomingNumber);
        }

    }
}

Answer 1

您可能沒有權限https://developer.android.com/training/permissions/requesting

並嘗試在輔助線程中運行http io代碼：

private class PhoneCallListener extends PhoneStateListener {
    private boolean isPhoneCalling = false;

    @Override
    public void onCallStateChanged(int state, String incomingNumber) {
        if (TelephonyManager.CALL_STATE_RINGING == state)
        {
            new AsyncTask<String,Void,Void>(){

                @Override
                protected Void doInBackground(String... voids) {
                    // phone ringing
                    String incomingNumber=voids[0];
                    Log.i("LOG_TAG", "RINGING, number: " + incomingNumber);
                    try {
                        URL url = new URL("http://example.com/log.php?state=Ringing");
                        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                        urlConnection.disconnect();
                    }
                    catch (MalformedURLException ex) {
                        Log.e("httptest",Log.getStackTraceString(ex));
                    }
                    catch (IOException ex) {
                        Log.e("httptest",Log.getStackTraceString(ex));
                    }

                    Log.i("LOG_TAG", "RINGING, number: " + incomingNumber);

                    return null;
                }
            }.execute(incomingNumber);
        }
    }
}

還查看是否存在網絡問題； 例如dns，訪問策略，路由問題...