LoginPageActivity.java

Question

我目前正在重构我的测试应用程序的登录页面，并且似乎无法弄清楚为什么每次setContentView（R.layout.activity_main_page）执行时我都会遇到此错误。

在＆＃34; setContentView（R.layout.activity_main_page）＆＃34;触发

错误在LoginPageActivity.java

中

com.example.jake.fieldinttest E: FATAL EXCEPTION: main
                             Process: com.example.jake.fieldinttest, PID: 15597
                             java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.jake.fieldinttest/com.example.jake.fieldinttest.LoginPage.LoginPageActivity}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class fragment
                                 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
                                 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
                                 at android.app.ActivityThread.-wrap12(ActivityThread.java)
                                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
                                 at android.os.Handler.dispatchMessage(Handler.java:102)
                                 at android.os.Looper.loop(Looper.java:154)
                                 at android.app.ActivityThread.main(ActivityThread.java:6077)
                                 at java.lang.reflect.Method.invoke(Native Method)
                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
                              Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class fragment
                              Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class fragment
                              Caused by: java.lang.IllegalStateException: Fragment com.example.jake.fieldinttest.LoginPage.LoginPageFragment did not create a view.
                                 at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:3545)
                                 at android.support.v4.app.FragmentController.onCreateView(FragmentController.java:120)
                                 at android.support.v4.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:330)
                                 at android.support.v4.app.BaseFragmentActivityApi14.onCreateView(BaseFragmentActivityApi14.java:39)
                                 at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:75)
                                 at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:777)
                                 at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
                                 at android.view.LayoutInflater.rInflate(LayoutInflater.java:858)
                                 at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
                                 at android.view.LayoutInflater.rInflate(LayoutInflater.java:861)
                                 at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
                                 at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
                                 at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
                                 at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
                                 at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:414)
                                 at android.app.Activity.setContentView(Activity.java:2414)
                                 at com.example.jake.fieldinttest.LoginPage.LoginPageActivity.onCreate(LoginPageActivity.java:26)
                                 at android.app.Activity.performCreate(Activity.java:6662)
                                 at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
                                 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
                                 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
                                 at android.app.ActivityThread.-wrap12(ActivityThread.java)
                                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
                                 at android.os.Handler.dispatchMessage(Handler.java:102)
                                 at android.os.Looper.loop(Looper.java:154)
                                 at android.app.ActivityThread.main(ActivityThread.java:6077)
                                 at java.lang.reflect.Method.invoke(Native Method)
                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)

我正在重构登录页面以遵循MVP架构，我已成功为我的应用程序的其他页面实现，但是对于初始登录页面，我收到错误。似乎可能是视图在设置之前没有被创建/膨胀，但为什么这会在这里造成问题，而不是在我的应用程序的任何其他页面中？我将此页面建模为与其他文件一样的XML文件。唯一的区别是它是应用程序的第一页。也许明显的问题是发射器页面？

感谢任何帮助，谢谢。

LoginPageActivity.java

package com.example.jake.fieldinttest.LoginPage;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import com.example.jake.fieldinttest.R;
import com.example.jake.fieldinttest.TestingModuleRepository;
import com.example.jake.fieldinttest.Util.ActivityUtils;



public class LoginPageActivity extends FragmentActivity {


    private LoginPageFragment loginPageFragment;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_page);



        //set fragment to activity
        loginPageFragment = (LoginPageFragment) 
getSupportFragmentManager().findFragmentById(R.id.loginpage_fragment);
        if (loginPageFragment == null){
            loginPageFragment = new LoginPageFragment();

ActivityUtils.addFragmentToActivity(getSupportFragmentManager(), loginPageFragment, R.id.loginpage_fragment);
        }

        //create the presenter
        new LoginPresenter(
            TestingModuleRepository.getInstance(),
            loginPageFragment);
    }
}




package com.example.jake.fieldinttest.LoginPage;

import android.support.annotation.NonNull;

import com.example.jake.fieldinttest.TestingModuleRepository;

LoginPresenter.java

public class LoginPresenter implements LoginContract.Presenter {

private final TestingModuleRepository mModuleRepository;
private final LoginContract.View mLoginView;



public LoginPresenter(
        @NonNull TestingModuleRepository moduleRepository,
        @NonNull LoginContract.View loginView) {


    mModuleRepository = moduleRepository;
    mLoginView = loginView;

    mLoginView.setPresenter(this);
}


@Override
public void start(){}


public void buttonClicked() {}

}

LoginPageFragment.java

package com.example.jake.fieldinttest.LoginPage;


import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.Fragment;


public class LoginPageFragment extends Fragment implements 
LoginContract.View {


private LoginContract.Presenter mPresenter;

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    return super.onCreateView(inflater, container, savedInstanceState);
  }

public LoginPageFragment(){

    Bundle arguments = new Bundle();
}

@Override
public void onResume() {
    super.onResume();
    mPresenter.start();
}

@Override
public void setPresenter(@NonNull LoginContract.Presenter presenter) {
    mPresenter = presenter;
}



@Override
public void displayIncorrectLoginToast() {

}
}

LoginContract.java

package com.example.jake.fieldinttest.LoginPage;


import com.example.jake.fieldinttest.BasePresenter;
import com.example.jake.fieldinttest.BaseView;


public interface LoginContract {
interface View extends BaseView<Presenter> {
    void displayIncorrectLoginToast();
}



interface Presenter extends BasePresenter {
    void buttonClicked();
}
}

activity_main_page.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<LinearLayout
    android:id="@+id/page_frame"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">


    <fragment class = "com.example.jake.fieldinttest.LoginPage.LoginPageFragment"
        android:id="@+id/loginpage_fragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</LinearLayout>
</RelativeLayout>

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.jake.fieldinttest">

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="com.android.vending.setup.PLAY_SETUP_SERVICE"/>



<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=".LoginPage.LoginPageActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />


        </intent-filter>
    </activity>



    <activity

        android:name=".FleetPage.FleetListPageActivity">

        <intent-filter>
            <action android:name="com.example.jake.fieldinttest.FleetPage.FleetListPageActivity" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>

    </activity>

    <activity

        android:name=".MainMenuPage.MainMenuActivity">

        <intent-filter>
            <action android:name="com.example.jake.fieldinttest.MainMenuPage.MainMenuActivity" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>

    </activity>
    <activity

        android:name=".PanelViewPage.PanelViewMain">

        <intent-filter>
            <action android:name="com.example.jake.fieldinttest.PanelViewPage.PanelViewMain" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>

    </activity>


    <meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="@string/google_maps_key" />

    <activity
        android:name=".MapPage.TotalMapViewPage">
        <intent-filter>
            <action android:name="com.example.jake.fieldinttest.MapPage.TotalMapViewPage" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>



    <activity

        android:name=".SomeNewPage">

        <intent-filter>
            <action android:name="com.example.jake.fieldinttest.SomeNewPage" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>

    </activity>
</application>

</manifest>

Answer 1

使用Fragments有两种主要方法，您可以检查here，这些方法是：Activity的布局中的片段或Java代码。似乎你正在使用第一个，片段在Activity的布局XML中声明。

在LogingPagerFragement.java中，您应该覆盖onCreateView，并返回由布局片段填充的View。你的代码看起来像那样：

public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.your_fragment,
                          container, false);
   return v;  }

虽然我强烈建议采用第二种方法，但这应该可行。

setContentView ...二进制XML文件行＃0：错误膨胀类片段

错误在LoginPageActivity.java

LoginPageActivity.java

LoginPresenter.java

LoginPageFragment.java

LoginContract.java

activity_main_page.xml

的AndroidManifest.xml

1 个答案: