無法從Android中的經度和緯度獲取地址

Question

我試圖從經度和緯度獲取地址，但是當我這樣做時，它無效。 它在logcat中的teamtreehouse.com.stromy.MainActivity.getCompleteAddressString（MainActivity.java:163）上顯示W / System.err：

這是我嘗試過的方法

private   String getCompleteAddressString() {
    String strAdd = "";
    Geocoder geocoder = new Geocoder(this, Locale.getDefault());
    try {
        List<Address> addresses = geocoder.getFromLocation(latitude, longitude, 1);
        if (addresses != null) {
            Address returnedAddress = addresses.get(0);
            StringBuilder strReturnedAddress = new StringBuilder("");

            for (int i = 0; i < returnedAddress.getMaxAddressLineIndex(); i++) {
                strReturnedAddress.append(returnedAddress.getAddressLine(i)).append("\n");
            }
            strAdd = strReturnedAddress.toString();
            //     Log.w("My Current loction address", "" + strReturnedAddress.toString());

        } else {
            //    Log.w("My Current loction address", "No Address returned!");
        }
    } catch (Exception e) {
        e.printStackTrace();
        //  Log.w("My Current loction address", "Canont get Address!");
    }
    return strAdd;
}

我這樣稱呼它

public void updateDisplay() {
    mLocation.setText(getCompleteAddressString());
}

在getCompleteAddressString（）方法中，我使用了經度和緯度，這是我已經從另一個方法獲得的，並且可以正常工作。 兩種方法都以main活動運行。 除此之外，其他所有東西都工作正常，我該如何解決？ 此錯誤的原因是什么？

Answer 1

像這樣嘗試：

        Geocoder gcd = new Geocoder(this, Locale.getDefault());
        List<Address> addresses = null;
        Address addr = null;
        try {
            addresses = gcd.getFromLocation(latitude, longitude, 1);
            if (addresses != null && addresses.size() > 0) {
                addr = addresses.get(0);
                String info = "Address is:  ";
                info += addr.getMaxAddressLineIndex() > 0 ? addr
                        .getAddressLine(0) : "";
                info = info + ", " + addr.getLocality() + ", "
                        + addr.getCountryName();
                Toast.makeText(getApplicationContext(), info,
                        Toast.LENGTH_LONG).show();
            } else
                Toast.makeText(getApplicationContext(),
                        "Address not found", Toast.LENGTH_LONG).show();
        } catch (Exception e) {
            Toast.makeText(getApplicationContext(), "Address not found",
                    Toast.LENGTH_LONG).show();
        }