respond to generic panic trigger Intent by locking

PanicKit provides a common framework for creating "panic button" apps that
can trigger actions in "panic responder" apps.  In this case, the response
is to lock the app, if it has been configured to do so

https://dev.guardianproject.info/projects/panic/wiki

AndroidManifest.xml

@@ -99,6 +99,14 @@
 			android:theme="@style/NoTitleBar"></activity>
 		<activity android:name="com.keepassdroid.GeneratePasswordActivity" 
 			android:theme="@style/NoTitleBar"></activity>
+		<activity android:name="com.keepassdroid.PanicResponderActivity"
+			android:launchMode="singleInstance" android:noHistory="true"
+			android:theme="@android:style/Theme.NoDisplay">
+    		<intent-filter>
+			    <action android:name="info.guardianproject.panic.action.TRIGGER" />
+			    <category android:name="android.intent.category.DEFAULT" />
+    		</intent-filter>
+		</activity>
 		<service android:name="com.keepassdroid.services.TimeoutService"></service>
 		<meta-data android:name="com.a0soft.gphone.aTrackDog.webURL" android:value="http://keepassdroid.com" />
 	</application>

src/com/keepassdroid/PanicResponderActivity.java

@@ -0,0 +1,39 @@
+
+package com.keepassdroid;
+
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Build;
+import android.os.Bundle;
+import android.util.Log;
+
+import com.android.keepass.KeePass;
+import com.keepassdroid.app.App;
+
+public class PanicResponderActivity extends Activity {
+
+    private static final String TAG = PanicResponderActivity.class.getSimpleName();
+
+    public static final String PANIC_TRIGGER_ACTION = "info.guardianproject.panic.action.TRIGGER";
+
+    @SuppressLint("NewApi")
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        Log.i(TAG, "onCreate");
+        super.onCreate(savedInstanceState);
+
+        Intent intent = getIntent();
+        if (intent != null && PANIC_TRIGGER_ACTION.equals(intent.getAction())) {
+            Log.i(TAG, "onCreate");
+            App.setShutdown();
+            setResult(KeePass.EXIT_LOCK);
+        }
+
+        if (Build.VERSION.SDK_INT >= 21) {
+            finishAndRemoveTask();
+        } else {
+            finish();
+        }
+    }
+}