所以我目前在我的MainActivity中有我的OkHttp请求，以测试它们实际上是否有效。但是，我需要将它们移动到一个单独的类，以便我可以使用请求来填充我的Navagation Drawer菜单项。此外，在我的MainActivity中，我执行了使令牌无效并请求它的oAuth，并且该令牌需要在我的请求中使用。当我在MainActivity中调用新类时，我有点迷失了apiRequest.run();这就是我在运行控制台中回来的。
I/System.out: ya29.CjBIAx67rM70-CKu9Wc5fUSLzt9rIqt4bRubpl4hB9UjwqeRatoZppbMmNDl_SPcFWA
E/AuthApp: ya29.CjBIAx67rM70-CKu9Wc5fUSLzt9rIqt4bRubpl4hB9UjwqeRatoZppbMmNDl_SPcFWA
W/System.err: java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.String android.content.SharedPreferences.getString(java.lang.String, java.lang.String)' on a null object reference
W/System.err: at com.example.jamessingleton.chffrapi.AuthPreferences.getToken(AuthPreferences.java:43)
W/System.err: at com.example.jamessingleton.chffrapi.APIRequests.run(APIRequests.java:34)
W/System.err: at com.example.jamessingleton.chffrapi.MainActivity$1.onClick(MainActivity.java:90)
W/System.err: at com.google.android.gms.common.SignInButton.onClick(Unknown Source)
W/System.err: at android.view.View.performClick(View.java:5697)
W/System.err: at android.widget.TextView.performClick(TextView.java:10814)
W/System.err: at android.view.View$PerformClick.run(View.java:22526)
W/System.err: at android.os.Handler.handleCallback(Handler.java:739)
W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95)
W/System.err: at android.os.Looper.loop(Looper.java:158)
W/System.err: at android.app.ActivityThread.main(ActivityThread.java:7224)
W/System.err: at java.lang.reflect.Method.invoke(Native Method)
W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
这是我正在实施的MainActivity。
Context mContext = MainActivity.this;
private AccountManager mAccountManager;
private AuthPreferences authPreferences;
private APIRequests apiRequests;
EditText emailText;
TextView responseView;
ProgressBar progressBar;
static final String API_URL = "https://api.comma.ai/v1/auth/?access_token=";
static final String ChffrMe_URL = "https://api.comma.ai/v1/me/";
static final String SCOPE = "https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/plus.me";
private static final int AUTHORIZATION_CODE = 1993;
private static final int ACCOUNT_CODE = 1601;
String commatoken;
String commaMyInfo;
private final OkHttpClient client = new OkHttpClient();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
responseView = (TextView) findViewById(R.id.responseView);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
mAccountManager = AccountManager.get(this);
authPreferences = new AuthPreferences(this);
apiRequests = new APIRequests();
final Context context = this;
invalidateToken();
requestToken();
SignInButton signInButton = (SignInButton) findViewById(R.id.sign_in_button);
signInButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (authPreferences.getUser() != null && authPreferences.getToken() != null) {
System.out.println(authPreferences.getToken());
doCoolAuthenticatedStuff();
// Intent intent = new Intent(context, NavDrawerActivity.class);
// startActivity(intent);
try {
apiRequests.run();
} catch (Exception e) {
e.printStackTrace();
}
// try {
// run();
// } catch (Exception e) {
// e.printStackTrace();
// }
//new RetrieveFeedTask().execute();
} else {
chooseAccount();
}
}
});
这是我的APIRequests.java
public class APIRequests {
private final OkHttpClient client = new OkHttpClient();
static final String API_URL = "https://api.comma.ai/v1/auth/?access_token=";
static final String ChffrMe_URL = "https://api.comma.ai/v1/me/";
private AuthPreferences authPreferences = new AuthPreferences(this);
String commatoken;
String commaMyInfo;
private MainActivity mActivity;
public void run() throws Exception {
Request request = new Request.Builder()
.url(API_URL + authPreferences.getToken())
.build();
client.newCall(request).enqueue(new Callback() {
public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
public void onResponse(Call call, Response response) throws IOException {
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
Headers responseHeaders = response.headers();
for (int i = 0, size = responseHeaders.size(); i < size; i++) {
System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
}
try
{
String token = response.body().string();
JSONObject json = new JSONObject(token);
commatoken = json.getString("access_token");
} catch (JSONException e)
{
}
// commatoken = response.body().string();
// System.out.println(commatoken);
if(response.isSuccessful())
{
final Request dataRequest = new Request.Builder()
.header("content-type", "application/x-www-form-urlencoded")
.header("authorization", "JWT "+ commatoken)
.url(ChffrMe_URL).build();
client.newCall(dataRequest).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
@Override
public void onResponse(Call call, Response responseMe) throws IOException {
if (!responseMe.isSuccessful()) throw new IOException("Unexpected code " + responseMe);
Headers responseHeaders = responseMe.headers();
for (int i = 0, size = responseHeaders.size(); i < size; i++) {
System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
}
try
{
String myInfo = responseMe.body().string();
JSONObject json = new JSONObject(myInfo);
commaMyInfo = json.getString("points");
System.out.println(commaMyInfo);
} catch (JSONException e)
{
}
// runOnUiThread(new Runnable() {
// @Override
// public void run() {
// responseView.setText("Comma Points: " +commaMyInfo);
// }
// });
}
});
}
}
});
}
}
不确定为什么它不喜欢我的apiRequests.run（）;
这是AuthPreferences
public class AuthPreferences {
private static final String KEY_USER = "user";
private static final String KEY_TOKEN = "token";
private SharedPreferences preferences;
public AuthPreferences(Context context) {
preferences = context
.getSharedPreferences("auth", Context.MODE_PRIVATE);
}
public AuthPreferences(APIRequests apiRequests) {
}
public void setUser(String user) {
Editor editor = preferences.edit();
editor.putString(KEY_USER, user);
editor.commit();
}
public void setToken(String password) {
Editor editor = preferences.edit();
editor.putString(KEY_TOKEN, password);
editor.commit();
}
public String getUser() {
return preferences.getString(KEY_USER, null);
}
public String getToken() {
return preferences.getString(KEY_TOKEN, null);
}
}
答案 0 :(得分：1)
您的AuthPreferences类有两个构造函数。一个设置preferences字段。另一个没有。当您使用未设置preferences字段的构造函数时崩溃，因为当您尝试使用该字段时该字段为null。
我建议摆脱第二个构造函数。然后，将APIRequests的构造函数添加为AuthPreferences作为参数，并使用该构造函数填充authPreferences字段（而不是创建AuthPreferences新的有缺陷的实例）。然后，在活动中，将apiRequests = new APIRequests();替换为apiRequests = new APIRequests(authPreferences);，以满足新构造函数的要求。