android.content.ActivityNotFoundException, unable to start activity
I have a problem with the Manifest of my Application. Clicking on a button on Main activity I want to start an other Activity, so I used this function:
public void startDatacenters() {
Intent intent = new Intent(context, Datacenters.class);
activity.startActivity(intent);}
The package of Datacenters.class is com.eco4cloud.activities.Datacenters
So my manifest is this:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.eco4cloud"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".activities.Main"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".activities.Datacenters"
android:label="@string/app_name" >
<intent-filter>
<action android:name="com.eco4cloud.activities.DATACENTERS" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
Android gave me this error i don't know why :(
05-24 18:01:32.622: D/AndroidRuntime(15404): Shutting down VM 05-24 18:01:32.622: W/dalvikvm(15404): threadid=1: thread exiting with uncaught exception (group=0x40a441f8) 05-24 18:01:32.632: E/AndroidRuntime(15404): FATAL EXCEPTION: main 05-24 18:01:32.632: E/AndroidRuntime(15404): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.eco4cloud/com.eco4cloud.activities.Main}: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.eco4cloud/com.eco4cloud.activities.Datacenters}; have you declared this activity in your AndroidManifest.xml? 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2079) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2104) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.ActivityThread.access$600(ActivityThread.java:132) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1157) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.os.Handler.dispatchMessage(Handler.java:99) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.os.Looper.loop(Looper.java:137) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.ActivityThread.main(ActivityThread.java:4575) 05-24 18:01:32.632: E/AndroidRuntime(15404): at java.lang.reflect.Method.invokeNative(Native Method) 05-24 18:01:32.632: E/AndroidRuntime(15404): at java.lang.reflect.Method.invoke(Method.java:511) 05-24 18:01:32.632: E/AndroidRuntime(15404): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 05-24 18:01:32.632: E/AndroidRuntime(15404): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556) 05-24 18:01:32.632: E/AndroidRuntime(15404): at dalvik.system.NativeStart.main(Native Method) 05-24 18:01:32.632: E/AndroidRuntime(15404): Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.eco4cloud/com.eco4cloud.activities.Datacenters}; have you declared this activity in your AndroidManifest.xml? 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1508) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1384) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.Activity.startActivityForResult(Activity.java:3190) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.Activity.startActivity(Activity.java:3297) 05-24 18:01:32.632: E/AndroidRuntime(15404): at com.eco4cloud.controllers.MainController.startDatacenters(MainController.java:46) 05-24 18:01:32.632: E/AndroidRuntime(15404): at com.eco4cloud.activities.Main.verifyAndSignIn(Main.java:117) 05-24 18:01:32.632: E/AndroidRuntime(15404): at com.eco4cloud.activities.Main.onCreate(Main.java:53) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.Activity.performCreate(Activity.java:4465) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 05-24 18:01:32.632: E/AndroidRuntime(15404): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2033) 05-24 18:01:32.632: E/AndroidRuntime(15404): ... 11 more
Someone can help me?? I don't know if the problem is with the package name or others things :(
Answer
I am not sure what you are trying to do.
But a couple of suggestions to try.
package="com.eco4cloud.activities"
// make sure package name is right.
// probably it should be as above.
Mention the package name as above
Since you have explicit intent you don't require a intent-filter
// use this assuming Datacenters is in package com.eco4cloud.activities
// also assuming package="com.eco4cloud.activities"
<activity
android:name=".Datacenters"
android:label="@string/app_name" >
</activity>
If package="com.eco4cloud" try the below
<activity
android:name="com.eco4cloud.activities.Datacenters"
android:label="@string/app_name" >
</activity>
If you are starting a activity in a non-activity class
public void startDatacenters() {
Intent intent = new Intent(context, Datacenters.class);
// assuming context is the activity content
context.startActivity(intent);
//in your case you have activity.startActivity(intent)
// not sure what activity is
}