Dagger项目在getApplication覆盖时无声地失败

Question

我试图在IntelliJ中运行Dagger简单示例,但它在DemoBaseActivity类中的getApplication调用失败:

public abstract class DemoBaseActivity extends Activity {
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
    ((DemoApplication) getApplication()).inject(this);
  }
}

当它达到注入方法时,应用程序会无声地失败而没有错误.我使用基类Activity的实例而不是DemoBaseActivity构建了项目,并且它部署得很好.

有什么想法吗？

编辑:

当Activity的getApplication()调用的返回值被转换为自定义DemoApplication类型时,它似乎正在破坏.

package com.badlogic.androidgames.simple;

import android.app.Application;
import dagger.ObjectGraph;

import java.util.Arrays;
import java.util.List;

    public class DemoApplication extends Application
    {
    private ObjectGraph graph;

    @Override
    public void onCreate()
    {
    super.onCreate();
    graph = ObjectGraph.create(getModules().toArray());
    }

    protected List<Object> getModules()
    {
    return Arrays.asList(new AndroidModule(this), new DemoModule());
    }

    public void inject(Object object)
    {
    graph.inject(object);
    }
    }

编辑:这是堆栈跟踪:

10-03 05:15:25.331:ERROR/AndroidRuntime(5035):FATAL EXCEPTION:main java.lang.RuntimeException:无法启动活动ComponentInfo {com.badlogic.androidgames.simple/com.badlogic.androidgames.simple.ui. HomeActivity}:java.lang.ClassCastException:android.app.Application无法在android.app.ActivityThread.handleLaunchActivity的android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)上强制转换为com.badlogic.androidgames.simple.DemoApplication. (ActivityThread.java:2261)在Android.app.Handler.dispatchMessage(Handler)上的android.app.ActivityThread.access $ 600(ActivityThread.java:141)android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1256) .java:99)在android.app.Looper.loop(Looper.java:137)android.app.ActivityThread.main(ActivityThread.java:5103)at java.lang.reflect.Method.invokeNative(Native Method)at java.lang.reflect.Method.invoke(Method.java:525)at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit. java:737)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)at dalvik.system.NativeStart.main(Native Method)引起:java.lang.ClassCastException:android.app.Application不能在com.badlogic.androidgames.simple.DemoBaseActivity.onCreate(DemoBaseActivity.java:33)中的com.badlogic.androidgctivity.simple.DeCappate.HomeActivity.onCreate(HomeActivity.java:)中转换为com.badlogic.androidgames.simple.DemoApplication. 30)在Android.app上的android.app.Activity.performCreate(Activity.java:5133)android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087).ActivityThread.performLaunchActivity(ActivityThread.java:2175)

Answer 1

正如评论中所讨论的那样 - 您忘了在AndroidManifest文件中提及您的应用程序类.这就是解决方案:

<application
    android:name="com.badlogic.androidgames.simple.DemoApplication"
...
>

...
</application>