[英]Android Studio 2.2.3: Error Running App: Default Activity not found
I am stuck with my AndroidManifest.xml file: 我被我的AndroidManifest.xml文件困住了:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mertino11.ourapplication">
<uses-permission android:name="android.permission.INTERNET" />
<activity
android:name=".AccountActivity"></activity>
android:theme="@style/AppTheme">
<application
android:name=".FireApp"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</application>
</manifest>
What am I doing wrong? 我究竟做错了什么?
You are doing all wrong. 你做错了。
Replace this code with yours. 将此代码替换为您的代码。
<application
android:name=".FireApp"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true">
<activity
android:name=".AccountActivity"
android:theme="@style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
<application
android:name=".FireApp"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true">
<activity
android:name=".AccountActivity"
android:theme="@style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
The activity does not hold the application, the application holds the activity. 活动不持有应用程序,应用程序持有活动。 What i'm saying is your AccountActivity resides inside your app - FireApp.
我的意思是你的AccountActivity存在于你的应用程序内 - FireApp。 So the application tag should come before the activity tag.
因此,应用程序标记应位于活动标记之前。
This is how your code should look after correction. 这是修改后代码的外观。
<application
android:name=".FireApp"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true">
<activity
android:name=".AccountActivity"
android:theme="@style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
The application tag is the root the for the activity tag 应用程序标记是活动标记的根
so activity tag comes after application tag as below 所以活动标签在应用程序标签之后,如下所示
<uses-permission android:name="android.permission.INTERNET" />
<application
android:name=".FireApp"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true">
<activity
android:name=".AccountActivity">
android:theme="@style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
Use this it will work. 使用它会起作用。
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".AccountActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
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