我收到此错误消息“java.net.UnknownHostException:无法解析主机“api.themoviedb.org”:没有与主机名关联的地址”。 我读到的所有 stackoverflow 帖子都说 list 文件可能是错误的,但我认为目前它是正确的,所以我不知道如何继续。
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.flixster">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
MainActivity.java:
package com.example.flixster;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import com.codepath.asynchttpclient.AsyncHttpClient;
import com.codepath.asynchttpclient.callback.JsonHttpResponseHandler;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import okhttp3.Headers;
import static com.facebook.stetho.inspector.network.PrettyPrinterDisplayType.JSON;
public class MainActivity extends AppCompatActivity {
public static final String NOW_PLAYING_URL =
"https://api.themoviedb.org/3//movie/now_playing?api_key=a07e22bc18f5cb106bfe4cc1f83ad8ed";
public static final String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// make get request on URL to get currently playing movies
AsyncHttpClient client = new AsyncHttpClient();
// JSON response handler since API returns JSON- deals with response success/failure
client.get(NOW_PLAYING_URL, new JsonHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Headers headers, JsonHttpResponseHandler.JSON json) {
Log.d(TAG, "onSuccess");
JSONObject jsonObject = json.jsonObject;
try {
JSONArray results = jsonObject.getJSONArray("result");
Log.i(TAG, "Results: " + results.toString());
} catch (JSONException e) {
Log.e(TAG, "Hit json exception", e);
e.printStackTrace();
}
}
@Override
public void onFailure(int statusCode, Headers headers, String response, Throwable throwable) {
Log.d(TAG, "onFailure");
}
});
}
}
最佳答案
查看您的代码,我发现了 2 个问题:
您的
NOW_PLAYING_URL
在 3 之后有一个额外的斜杠 (themoviedb.org/3//movie/
),因此请将字符串替换为public static final String NOW_PLAYING_URL = "https://api.themoviedb.org/3/movie/now_playing?api_key=a07e22bc18f5cb106bfe4cc1f83ad8ed";
这就是您的 api 调用返回失败的原因。
接下来,响应成功,但在您的
onSuccess()
try
block 中,您正在获取"result"
的数据,但是您的 API 响应返回“结果”
,因此请按如下所示替换该键,您应该不会遇到任何问题。JSONArray results = jsonObject.getJSONArray("results");
希望这有帮助。
关于java.net.UnknownHostException : Unable to resolve host "api. themoviedb.org,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/60022852/