src/com/android/gallery3d/app/ActivityState.java - platform/packages/apps/Gallery2 - Git at Google

 /*
  * 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.MenuInflater;
 import android.view.MenuItem;
 import android.view.Window;
 import android.view.WindowManager;

 import com.android.gallery3d.R;
 import com.android.gallery3d.anim.StateTransitionAnimation;
 import com.android.gallery3d.ui.GLView;
 import com.android.gallery3d.ui.PreparePageFadeoutTexture;
 import com.android.gallery3d.ui.RawTexture;
 import com.android.gallery3d.util.GalleryUtils;

 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;
     protected static final int FLAG_ALLOW_LOCK_WHILE_SCREEN_ON = 16;
     protected static final int FLAG_SHOW_WHEN_LOCKED = 32;

     protected AbstractGalleryActivity 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;

     private static final String KEY_TRANSITION_IN = "transition-in";

     private StateTransitionAnimation.Transition mNextTransition =
             StateTransitionAnimation.Transition.None;
     private StateTransitionAnimation mIntroAnimation;
     private GLView mContentPane;

     protected ActivityState() {
     }

     protected void setContentPane(GLView content) {
         mContentPane = content;
         if (mIntroAnimation != null) {
             mContentPane.setIntroAnimation(mIntroAnimation);
             mIntroAnimation = null;
         }
         mContentPane.setBackgroundColor(getBackgroundColor());
         mActivity.getGLRoot().setContentPane(mContentPane);
     }

     void initialize(AbstractGalleryActivity 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 float[] mBackgroundColor;

     protected int getBackgroundColorId() {
         return R.color.default_background;
     }

     protected float[] getBackgroundColor() {
         return mBackgroundColor;
     }

     protected void onCreate(Bundle data, Bundle storedState) {
         mBackgroundColor = GalleryUtils.intColorToFloatARGBArray(
                 mActivity.getResources().getColor(getBackgroundColorId()));
     }

     protected void clearStateResult() {
     }

     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;
                     setScreenFlags();
                 }
             }
         }
     };

     private void setScreenFlags() {
         final Window win = 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 |= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
         } else {
             params.flags &= ~WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
         }
         if (0 != (mFlags & FLAG_ALLOW_LOCK_WHILE_SCREEN_ON)) {
             params.flags |= WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON;
         } else {
             params.flags &= ~WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON;
         }
         if (0 != (mFlags & FLAG_SHOW_WHEN_LOCKED)) {
             params.flags |= WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
         } else {
             params.flags &= ~WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
         }
         win.setAttributes(params);
     }

     protected void transitionOnNextPause(Class<? extends ActivityState> outgoing,
             Class<? extends ActivityState> incoming, StateTransitionAnimation.Transition hint) {
         if (outgoing == PhotoPage.class && incoming == AlbumPage.class) {
             mNextTransition = StateTransitionAnimation.Transition.Outgoing;
         } else if (outgoing == AlbumPage.class && incoming == PhotoPage.class) {
             mNextTransition = StateTransitionAnimation.Transition.PhotoIncoming;
         } else {
             mNextTransition = hint;
         }
     }

     protected void onPause() {
         if (0 != (mFlags & FLAG_SCREEN_ON_WHEN_PLUGGED)) {
             ((Activity) mActivity).unregisterReceiver(mPowerIntentReceiver);
         }
         if (mNextTransition != StateTransitionAnimation.Transition.None) {
             mActivity.getTransitionStore().put(KEY_TRANSITION_IN, mNextTransition);
             PreparePageFadeoutTexture.prepareFadeOutTexture(mActivity, mContentPane);
             mNextTransition = StateTransitionAnimation.Transition.None;
         }
     }

     // should only be called by StateManager
     void resume() {
         AbstractGalleryActivity activity = 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();

         setScreenFlags();

         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() {
         RawTexture fade = mActivity.getTransitionStore().get(
                 PreparePageFadeoutTexture.KEY_FADE_TEXTURE);
         mNextTransition = mActivity.getTransitionStore().get(
                 KEY_TRANSITION_IN, StateTransitionAnimation.Transition.None);
         if (mNextTransition != StateTransitionAnimation.Transition.None) {
             mIntroAnimation = new StateTransitionAnimation(mNextTransition, fade);
             mNextTransition = StateTransitionAnimation.Transition.None;
         }
     }

     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;
     }

     protected MenuInflater getSupportMenuInflater() {
         return mActivity.getMenuInflater();
     }
 }
	/*
	* 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.MenuInflater;
	import android.view.MenuItem;
	import android.view.Window;
	import android.view.WindowManager;

	import com.android.gallery3d.R;
	import com.android.gallery3d.anim.StateTransitionAnimation;
	import com.android.gallery3d.ui.GLView;
	import com.android.gallery3d.ui.PreparePageFadeoutTexture;
	import com.android.gallery3d.ui.RawTexture;
	import com.android.gallery3d.util.GalleryUtils;

	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;
	protected static final int FLAG_ALLOW_LOCK_WHILE_SCREEN_ON = 16;
	protected static final int FLAG_SHOW_WHEN_LOCKED = 32;

	protected AbstractGalleryActivity 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;

	private static final String KEY_TRANSITION_IN = "transition-in";

	private StateTransitionAnimation.Transition mNextTransition =
	StateTransitionAnimation.Transition.None;
	private StateTransitionAnimation mIntroAnimation;
	private GLView mContentPane;

	protected ActivityState() {
	}

	protected void setContentPane(GLView content) {
	mContentPane = content;
	if (mIntroAnimation != null) {
	mContentPane.setIntroAnimation(mIntroAnimation);
	mIntroAnimation = null;
	}
	mContentPane.setBackgroundColor(getBackgroundColor());
	mActivity.getGLRoot().setContentPane(mContentPane);
	}

	void initialize(AbstractGalleryActivity 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 float[] mBackgroundColor;

	protected int getBackgroundColorId() {
	return R.color.default_background;
	}

	protected float[] getBackgroundColor() {
	return mBackgroundColor;
	}

	protected void onCreate(Bundle data, Bundle storedState) {
	mBackgroundColor = GalleryUtils.intColorToFloatARGBArray(
	mActivity.getResources().getColor(getBackgroundColorId()));
	}

	protected void clearStateResult() {
	}

	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;
	setScreenFlags();
	}
	}
	}
	};

	private void setScreenFlags() {
	final Window win = 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 \|= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
	} else {
	params.flags &= ~WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
	}
	if (0 != (mFlags & FLAG_ALLOW_LOCK_WHILE_SCREEN_ON)) {
	params.flags \|= WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON;
	} else {
	params.flags &= ~WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON;
	}
	if (0 != (mFlags & FLAG_SHOW_WHEN_LOCKED)) {
	params.flags \|= WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
	} else {
	params.flags &= ~WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
	}
	win.setAttributes(params);
	}

	protected void transitionOnNextPause(Class<? extends ActivityState> outgoing,
	Class<? extends ActivityState> incoming, StateTransitionAnimation.Transition hint) {
	if (outgoing == PhotoPage.class && incoming == AlbumPage.class) {
	mNextTransition = StateTransitionAnimation.Transition.Outgoing;
	} else if (outgoing == AlbumPage.class && incoming == PhotoPage.class) {
	mNextTransition = StateTransitionAnimation.Transition.PhotoIncoming;
	} else {
	mNextTransition = hint;
	}
	}

	protected void onPause() {
	if (0 != (mFlags & FLAG_SCREEN_ON_WHEN_PLUGGED)) {
	((Activity) mActivity).unregisterReceiver(mPowerIntentReceiver);
	}
	if (mNextTransition != StateTransitionAnimation.Transition.None) {
	mActivity.getTransitionStore().put(KEY_TRANSITION_IN, mNextTransition);
	PreparePageFadeoutTexture.prepareFadeOutTexture(mActivity, mContentPane);
	mNextTransition = StateTransitionAnimation.Transition.None;
	}
	}

	// should only be called by StateManager
	void resume() {
	AbstractGalleryActivity activity = 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();

	setScreenFlags();

	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() {
	RawTexture fade = mActivity.getTransitionStore().get(
	PreparePageFadeoutTexture.KEY_FADE_TEXTURE);
	mNextTransition = mActivity.getTransitionStore().get(
	KEY_TRANSITION_IN, StateTransitionAnimation.Transition.None);
	if (mNextTransition != StateTransitionAnimation.Transition.None) {
	mIntroAnimation = new StateTransitionAnimation(mNextTransition, fade);
	mNextTransition = StateTransitionAnimation.Transition.None;
	}
	}

	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;
	}

	protected MenuInflater getSupportMenuInflater() {
	return mActivity.getMenuInflater();
	}
	}