Question

我刚开始学习OkHttp。我的示例代码如下

public class MainActivity extends AppCompatActivity {
    private static final String LOG_TAG = "OkHttp";
    private TextView mTextView;
    private Handler mHandler;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mTextView = (TextView) findViewById(R.id.textView);
        mHandler = new Handler(Looper.getMainLooper());
        OkHttpClient client = new OkHttpClient();
        RequestBody requestBody = new FormEncodingBuilder()
                .add("grant_type", "password")
                .add("username", "bnk")
                .add("password", "bnk")
                .build();
        Request request = new Request.Builder()
                .url("http://...")
                .post(requestBody)
                .build();
        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Request request, IOException e) {
                mTextView.setText(e.toString());
                Log.e(LOG_TAG, e.toString());
            }
            @Override
            public void onResponse(Response response) throws IOException {
                try {
                    JSONObject jsonObject = new JSONObject(response.body().string());
                    final String message = jsonObject.toString(5);
                    Log.i(LOG_TAG, message);
                    mHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            mTextView.setText(message);
                        }
                    });
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        });
    }
}

我知道我应该使用Handler setText来TextView onResponse onFailure，但是Handler我不会使用onFailure {1}}并在调用android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.时检查结果。奇怪的是，有时我的应用程序与TextView崩溃，有时可行（我的意思是Exception可以显示Looper.myLooper() == Looper.getMainLooper()）。

我是OkHttp的新手。

更新

从下面的@NightlyNexus评论中，我尝试检查FALSE，结果始终是//HTML file <!doctype html> <html> <head> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css"> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.9/jquery-ui.min.js"></script> <script src=angularfiles/angular.min.js"></script> <script src="bootstrap/bootstrap.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/ng-dialog/0.5.1/js/ngDialog.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/ng-dialog/0.5.1/css/ngDialog.css"></script> <script src="jsfiles/console.js"></script> </head> <body ng-app="myapp" ng-controller="controller" > <div class="container-fluid col-lg-2" style="background-color:#848482;padding-top:25px;height:657px">  <h4>Controlls:</h4> <button class="btn btn-primary" ng-dialog="firstDialogId" ng-dialog-controller="InsideCtrl" ng-dialog-data="{{jsonData}}" ng-dialog-class="ngdialog-theme-default" ng-dialog-show-close="false">Open via directive</button> </div> </body> </html> //js file var app=angular.module("myapp",['ngDialog']); myapp.controller("controller",["$scope",function($scope){ $scope.clickme=function(){ console.log("hi"); ngDialog.open({ template: 'externalTemplate.html', controller: 'SomeController' }); }; }]);，但是，正如我所说，该应用仍然有效。请参阅以下屏幕截图：

OkHttp for Android：为什么onFailure有时仍然可以在TextView上使用setText而不使用Handler

更新

0 个答案: