c2dbc74942
Get out of the way of documentLaunchMode, let ActivityManager do the work for us. Quiet some noisy logging. Bug: 24413182 Change-Id: Ia48244871296f5c6b83a838dcde6496acbd45793
105 lines
3.4 KiB
Java
105 lines
3.4 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.documentsui;
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import static com.android.documentsui.Shared.DEBUG;
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import android.app.Activity;
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import android.app.ActivityManager;
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import android.app.ActivityManager.AppTask;
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import android.content.Context;
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import android.content.Intent;
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import android.net.Uri;
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import android.os.Bundle;
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import android.support.annotation.Nullable;
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import android.util.Log;
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import java.util.List;
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/**
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* Provides FilesActivity task grouping support. This allows multiple FilesActivities to be
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* launched (a behavior imparted by way of {@code documentLaunchMode="intoExisting"} and
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* our use of pseudo document {@link Uri}s. This also lets us move an existing task
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* to the foreground when a suitable task exists.
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*
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* Requires that {@code documentLaunchMode="intoExisting"} be set on target activity.
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*
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*/
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public class LauncherActivity extends Activity {
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private static final String LAUNCH_CONTROL_AUTHORITY = "com.android.documentsui.launchControl";
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private static final String TAG = "LauncherActivity";
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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ActivityManager activities = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
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Intent intent = findTask(activities);
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if (intent != null) {
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restoreTask(intent);
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} else {
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startTask();
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}
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finish();
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}
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private @Nullable Intent findTask(ActivityManager activities) {
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List<AppTask> tasks = activities.getAppTasks();
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for (AppTask task : tasks) {
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Intent intent = task.getTaskInfo().baseIntent;
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Uri uri = intent.getData();
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if (isLaunchUri(uri)) {
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return intent;
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}
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}
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return null;
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}
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private void startTask() {
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Intent intent = createLaunchIntent(this);
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if (DEBUG) Log.d(TAG, "Starting new task > " + intent.getData());
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startActivity(intent);
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}
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private void restoreTask(Intent intent) {
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if (DEBUG) Log.d(TAG, "Restoring existing task > " + intent.getData());
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// TODO: This doesn't appear to restore a task once it has stopped running.
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startActivity(intent);
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}
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static Intent createLaunchIntent(Context context) {
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Intent intent = new Intent(context, FilesActivity.class);
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intent.setData(buildLaunchUri());
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return intent;
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}
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private static Uri buildLaunchUri() {
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return new Uri.Builder()
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.authority(LAUNCH_CONTROL_AUTHORITY)
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.fragment(String.valueOf(System.currentTimeMillis()))
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.build();
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}
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static boolean isLaunchUri(@Nullable Uri uri) {
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boolean result = uri != null && LAUNCH_CONTROL_AUTHORITY.equals(uri.getAuthority());
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return result;
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}
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}
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