Declaring DeviceListActivity in AndroidManifest.xml

Logcat output

04-10 16:47:14.546  13580-13580/com.example.wei_hsiunghuang.my1stbluetooth E/AndroidRuntime﹕ FATAL EXCEPTION: main

    android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.wei_hsiunghuang.my1stbluetooth/com.example.wei_hsiunghuang.my1stbluetooth.DeviceListActivity}; have you declared this activity in your AndroidManifest.xml?

    at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1545)

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The DeviceListActivity is indeed missing in the AndroidManifest.xml.

AndroidManifest.xml – Original Version

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.wei_hsiunghuang.my1stbluetooth" >

    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
    <uses-permission android:name="android.permission.BLUETOOTH"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

Check and make sure that “DeviceListActivity.java” is in the project before adding the declaration for it in AndroidManifest.xml

AndroidManifest.xml – Updated Version

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.wei_hsiunghuang.my1stbluetooth" >

    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
    <uses-permission android:name="android.permission.BLUETOOTH"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            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=".DeviceListActivity"
            android:label="@string/select_device"
            android:theme="@style/DialogTheme" />

    </application>

</manifest>

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The @style/DialogTheme is defined in res/values/styles.xml.

Styles.xml - Original Version

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.Sherlock"/>
</resources>

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Styles.xml - Updated Version

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.Sherlock"/>
    <style name="DialogTheme" parent="@android:style/Theme.Dialog"/>
</resources>