Add preference controller to launch app-time-spent UI.

Bug: 74580195
Test: robotests
Change-Id: Iba9338f04cc037a134ef9445ce97cbbe21f53833

src/com/android/settings/applications/appinfo/TimeSpentInAppPreferenceController.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.applications.appinfo;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.support.annotation.VisibleForTesting;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+import android.text.TextUtils;
+
+import com.android.settings.core.BasePreferenceController;
+
+import java.util.List;
+
+public class TimeSpentInAppPreferenceController extends BasePreferenceController {
+
+    @VisibleForTesting
+    static final Intent SEE_TIME_IN_APP_TEMPLATE =
+            new Intent("com.android.settings.action.TIME_SPENT_IN_APP");
+
+    private final PackageManager mPackageManager;
+
+    private Intent mIntent;
+    private String mPackageName;
+
+    public TimeSpentInAppPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+        mPackageManager = context.getPackageManager();
+    }
+
+    public void setPackageName(String packageName) {
+        mPackageName = packageName;
+        mIntent = new Intent(SEE_TIME_IN_APP_TEMPLATE)
+                .putExtra(Intent.EXTRA_PACKAGE_NAME, mPackageName);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (TextUtils.isEmpty(mPackageName)) {
+            return DISABLED_UNSUPPORTED;
+        }
+        final List<ResolveInfo> resolved = mPackageManager.queryIntentActivities(mIntent,
+                0 /* flags */);
+        if (resolved == null || resolved.isEmpty()) {
+            return DISABLED_UNSUPPORTED;
+        }
+        return AVAILABLE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        final Preference pref = screen.findPreference(getPreferenceKey());
+        if (pref != null) {
+            pref.setIntent(mIntent);
+        }
+    }
+}