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[英]Error: java.net.UnknownHostException: Unable to resolve host "api.themoviedb.org
[英]java.net.UnknownHostException: Unable to resolve host "api.themoviedb.org
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”。 我读过的所有stackoverflow帖子都说清单文件可能是错误的,但我认为此时是正确的,所以我不确定如何继续。
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>
主活动.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");
}
});
}
}
查看您的代码,我发现了两个问题:
您的NOW_PLAYING_URL
在 3 之后有一个额外的斜线( themoviedb.org/3//movie/
),因此将字符串替换为
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
块中,您正在获取"result"
数据,但您的 API 响应返回"results"
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");
希望这可以帮助。
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