Disable screen lock programatically

src/test/projects/morseflash/morseflash-app/src/main/AndroidManifest.xml

@@ -4,6 +4,10 @@
     android:versionCode="1" 
     android:versionName="1.0.0-SNAPSHOT">
 
+  <!-- these are only needed for the instrumentation test-->
+  <uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
+  <uses-permission android:name="android.permission.WAKE_LOCK"/>
+
   <uses-sdk android:minSdkVersion="7" android:targetSdkVersion="19"/>
   <application android:name="MorseFlashApplication" android:debuggable="true" android:icon="@drawable/icon" android:label="@string/app_name">
     <activity android:name="ConfigureMorseActivity" android:label="@string/app_name">

src/test/projects/morseflash/morseflash-instrumentation/src/main/AndroidManifest.xml

@@ -6,7 +6,7 @@
     <application>
         <uses-library android:name="android.test.runner"/>
     </application>
-    <instrumentation android:name="android.support.test.runner.AndroidJUnitRunner"
+    <instrumentation android:name="com.simpligility.android.morseflash.ScreenUnlockerTestRunner"
                      android:targetPackage="com.simpligility.android.morseflash"
                      android:label="Tests for MorseFlash."/>
 </manifest>

src/test/projects/morseflash/morseflash-instrumentation/src/main/java/com/simpligility/android/morseflash/ScreenUnlockerTestRunner.java

@@ -0,0 +1,47 @@
+package com.simpligility.android.morseflash;
+
+import android.app.KeyguardManager;
+import android.content.Context;
+import android.os.PowerManager;
+import android.support.test.runner.AndroidJUnitRunner;
+
+import static android.content.Context.KEYGUARD_SERVICE;
+import static android.content.Context.POWER_SERVICE;
+import static android.os.PowerManager.ACQUIRE_CAUSES_WAKEUP;
+import static android.os.PowerManager.FULL_WAKE_LOCK;
+import static android.os.PowerManager.ON_AFTER_RELEASE;
+
+/**
+ * Instrumentation which unlocks the screen before running any test.
+ * This needs the following permissions in the <b>application</b> manifest:
+ *
+ * <pre>
+ *     <uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
+ *     <uses-permission android:name="android.permission.WAKE_LOCK"/>
+ * </pre>
+ *
+ * Adapted from https://github.com/JakeWharton/u2020/blob/master/src/androidTestInternal/java/com/jakewharton/u2020/U2020TestRunner.java.
+ */
+public final class ScreenUnlockerTestRunner extends AndroidJUnitRunner {
+
+    @Override
+    public void onStart() {
+        runOnMainSync(new Runnable() {
+            @SuppressWarnings("deprecation")
+            // We don't care about deprecation here.
+            public void run() {
+                Context app = getTargetContext().getApplicationContext();
+
+                String name = ScreenUnlockerTestRunner.class.getSimpleName();
+                // Unlock the device so that the tests can input keystrokes.
+                KeyguardManager keyguard = (KeyguardManager) app.getSystemService(KEYGUARD_SERVICE);
+                keyguard.newKeyguardLock(name).disableKeyguard();
+                // Wake up the screen.
+                PowerManager power = (PowerManager) app.getSystemService(POWER_SERVICE);
+                power.newWakeLock(FULL_WAKE_LOCK | ACQUIRE_CAUSES_WAKEUP | ON_AFTER_RELEASE, name).acquire();
+            }
+        });
+
+        super.onStart();
+    }
+}