Kill App on Long-Press Back Key (framework)

Change-Id: Ib78fff9e32d95a0a112ddd9274b79b3a3aa626b9

1 files changed, 36 insertions, 0 deletions

diff --git a/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java b/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
index 0b223c1..9511a62 100755
--- a/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
+++ b/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
@@ -18,6 +18,7 @@ package com.android.internal.policy.impl;
 
 import android.app.Activity;
 import android.app.ActivityManagerNative;
+import android.app.ActivityManager.RunningAppProcessInfo;
 import android.app.IActivityManager;
 import android.app.IUiModeManager;
 import android.app.ProgressDialog;
@@ -48,6 +49,7 @@ import android.os.LocalPowerManager;
 import android.os.Message;
 import android.os.Messenger;
 import android.os.PowerManager;
+import android.os.Process;
 import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.os.SystemClock;
@@ -142,6 +144,7 @@ import java.io.FileReader;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.ArrayList;
+import java.util.List;
 
 /**
  * WindowManagerPolicy implementation for the Android phone UI.  This
@@ -660,6 +663,28 @@ public class PhoneWindowManager implements WindowManagerPolicy {
         }
     };
 
+    Runnable mBackLongPress = new Runnable() {
+        public void run() {
+            try {
+                IActivityManager mgr = ActivityManagerNative.getDefault();
+                List<RunningAppProcessInfo> apps = mgr.getRunningAppProcesses();
+                for (RunningAppProcessInfo appInfo : apps) {
+                    int uid = appInfo.uid;
+                    // Make sure it's a foreground user application (not system,
+                    // root, phone, etc.)
+                    if (uid >= Process.FIRST_APPLICATION_UID && uid <= Process.LAST_APPLICATION_UID
+                            && appInfo.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
+                        // Kill the entire pid
+                        Process.killProcess(appInfo.pid);
+                        break;
+                    }
+                }
+            } catch (RemoteException remoteException) {
+                // Do nothing; just let it go.
+            }
+        }
+    };
+
     void showGlobalActionsDialog() {
         if (mGlobalActions == null) {
             mGlobalActions = new GlobalActions(mContext);
@@ -1520,6 +1545,10 @@ public class PhoneWindowManager implements WindowManagerPolicy {
             }
         }
 
+        if (keyCode == KeyEvent.KEYCODE_BACK && !down) {
+            mHandler.removeCallbacks(mBackLongPress);
+        }
+
         // First we always handle the home key here, so applications
         // can never break it, although if keyguard is on, we do let
         // it handle it, because that gives us the correct 5 second
@@ -1628,6 +1657,13 @@ public class PhoneWindowManager implements WindowManagerPolicy {
                 showOrHideRecentAppsDialog(RECENT_APPS_BEHAVIOR_SHOW_OR_DISMISS);
             }
             return -1;
+        } else if (keyCode == KeyEvent.KEYCODE_BACK) {
+            if (Settings.Secure.getInt(mContext.getContentResolver(),
+                    Settings.Secure.KILL_APP_LONGPRESS_BACK, 0) == 1) {
+                if (down && repeatCount == 0) {
+                    mHandler.postDelayed(mBackLongPress, 2000);
+                }
+            }
         }
 
         // Shortcuts are invoked through Search+key, so intercept those here