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/*
* Copyright (C) 2010 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.gallery3d.app;
import android.app.ActionBar;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.res.Configuration;
import android.os.BatteryManager;
import android.os.Bundle;
import android.provider.Settings;
import android.provider.Settings.SettingNotFoundException;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.view.WindowManager;
import com.android.gallery3d.ui.GLView;
abstract public class ActivityState {
protected static final int FLAG_HIDE_ACTION_BAR = 1;
protected static final int FLAG_HIDE_STATUS_BAR = 2;
protected static final int FLAG_SCREEN_ON_WHEN_PLUGGED = 4;
protected static final int FLAG_SCREEN_ON_ALWAYS = 8;
private static final int SCREEN_ON_FLAGS = (
WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
| WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
| WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
);
protected GalleryActivity mActivity;
protected Bundle mData;
protected int mFlags;
protected ResultEntry mReceivedResults;
protected ResultEntry mResult;
protected static class ResultEntry {
public int requestCode;
public int resultCode = Activity.RESULT_CANCELED;
public Intent resultData;
}
protected boolean mHapticsEnabled;
private ContentResolver mContentResolver;
private boolean mDestroyed = false;
private boolean mPlugged = false;
boolean mIsFinishing = false;
protected ActivityState() {
}
protected void setContentPane(GLView content) {
mActivity.getGLRoot().setContentPane(content);
}
void initialize(GalleryActivity activity, Bundle data) {
mActivity = activity;
mData = data;
mContentResolver = activity.getAndroidContext().getContentResolver();
}
public Bundle getData() {
return mData;
}
protected void onBackPressed() {
mActivity.getStateManager().finishState(this);
}
protected void setStateResult(int resultCode, Intent data) {
if (mResult == null) return;
mResult.resultCode = resultCode;
mResult.resultData = data;
}
protected void onConfigurationChanged(Configuration config) {
}
protected void onSaveState(Bundle outState) {
}
protected void onStateResult(int requestCode, int resultCode, Intent data) {
}
protected void onCreate(Bundle data, Bundle storedState) {
}
BroadcastReceiver mPowerIntentReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
if (Intent.ACTION_BATTERY_CHANGED.equals(action)) {
boolean plugged = (0 != intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, 0));
if (plugged != mPlugged) {
mPlugged = plugged;
setScreenOnFlags();
}
}
}
};
void setScreenOnFlags() {
final Window win = ((Activity) mActivity).getWindow();
final WindowManager.LayoutParams params = win.getAttributes();
if ((0 != (mFlags & FLAG_SCREEN_ON_ALWAYS)) ||
(mPlugged && 0 != (mFlags & FLAG_SCREEN_ON_WHEN_PLUGGED))) {
params.flags |= SCREEN_ON_FLAGS;
} else {
params.flags &= ~SCREEN_ON_FLAGS;
}
win.setAttributes(params);
}
protected void onPause() {
if (0 != (mFlags & FLAG_SCREEN_ON_WHEN_PLUGGED)) {
((Activity) mActivity).unregisterReceiver(mPowerIntentReceiver);
}
}
// should only be called by StateManager
void resume() {
AbstractGalleryActivity activity = (AbstractGalleryActivity) mActivity;
ActionBar actionBar = activity.getActionBar();
if (actionBar != null) {
if ((mFlags & FLAG_HIDE_ACTION_BAR) != 0) {
actionBar.hide();
} else {
actionBar.show();
}
int stateCount = mActivity.getStateManager().getStateCount();
mActivity.getGalleryActionBar().setDisplayOptions(stateCount > 1, true);
// Default behavior, this can be overridden in ActivityState's onResume.
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
}
activity.invalidateOptionsMenu();
setScreenOnFlags();
boolean lightsOut = ((mFlags & FLAG_HIDE_STATUS_BAR) != 0);
mActivity.getGLRoot().setLightsOutMode(lightsOut);
ResultEntry entry = mReceivedResults;
if (entry != null) {
mReceivedResults = null;
onStateResult(entry.requestCode, entry.resultCode, entry.resultData);
}
if (0 != (mFlags & FLAG_SCREEN_ON_WHEN_PLUGGED)) {
// we need to know whether the device is plugged in to do this correctly
final IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_BATTERY_CHANGED);
activity.registerReceiver(mPowerIntentReceiver, filter);
}
try {
mHapticsEnabled = Settings.System.getInt(mContentResolver,
Settings.System.HAPTIC_FEEDBACK_ENABLED) != 0;
} catch (SettingNotFoundException e) {
mHapticsEnabled = false;
}
onResume();
// the transition store should be cleared after resume;
mActivity.getTransitionStore().clear();
}
// a subclass of ActivityState should override the method to resume itself
protected void onResume() {
}
protected boolean onCreateActionBar(Menu menu) {
// TODO: we should return false if there is no menu to show
// this is a workaround for a bug in system
return true;
}
protected boolean onItemSelected(MenuItem item) {
return false;
}
protected void onDestroy() {
mDestroyed = true;
}
boolean isDestroyed() {
return mDestroyed;
}
public boolean isFinishing() {
return mIsFinishing;
}
}
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