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/*
* Copyright (C) 2012 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.cellbroadcastreceiver;
import android.app.Activity;
import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.provider.Telephony;
import android.telephony.CellBroadcastMessage;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
/**
* Full-screen emergency alert with flashing warning icon.
* Alert audio and text-to-speech handled by {@link CellBroadcastAlertAudio}.
* Keyguard handling based on {@code AlarmAlertFullScreen} class from DeskClock app.
*/
public class CellBroadcastAlertFullScreen extends Activity {
/**
* Intent extra for full screen alert launched from dialog subclass as a result of the
* screen turning off.
*/
static final String SCREEN_OFF = "screen_off";
/** Whether to show the flashing warning icon. */
private boolean mIsEmergencyAlert;
/** The cell broadcast message to display. */
CellBroadcastMessage mMessage;
/** Length of time for the warning icon to be visible. */
private static final int WARNING_ICON_ON_DURATION_MSEC = 800;
/** Length of time for the warning icon to be off. */
private static final int WARNING_ICON_OFF_DURATION_MSEC = 800;
/** Warning icon state. false = visible, true = off */
private boolean mIconAnimationState;
/** Stop animating icon after {@link #onStop()} is called. */
private boolean mStopAnimation;
/** The warning icon Drawable. */
private Drawable mWarningIcon;
/** The View containing the warning icon. */
private ImageView mWarningIconView;
/** Icon animation handler for flashing warning alerts. */
private final Handler mAnimationHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (mIconAnimationState) {
mWarningIconView.setImageAlpha(255);
if (!mStopAnimation) {
mAnimationHandler.sendEmptyMessageDelayed(0, WARNING_ICON_ON_DURATION_MSEC);
}
} else {
mWarningIconView.setImageAlpha(0);
if (!mStopAnimation) {
mAnimationHandler.sendEmptyMessageDelayed(0, WARNING_ICON_OFF_DURATION_MSEC);
}
}
mIconAnimationState = !mIconAnimationState;
mWarningIconView.invalidateDrawable(mWarningIcon);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final Window win = getWindow();
// We use a custom title, so remove the standard dialog title bar
win.requestFeature(Window.FEATURE_NO_TITLE);
// Full screen alerts display above the keyguard and when device is locked.
win.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN
| WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
| WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
// Turn on the screen unless we're being launched from the dialog subclass as a result of
// the screen turning off.
if (!getIntent().getBooleanExtra(SCREEN_OFF, false)) {
win.addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}
// Save message for passing from dialog to fullscreen activity, and for marking read.
mMessage = getIntent().getParcelableExtra(
CellBroadcastMessage.SMS_CB_MESSAGE_EXTRA);
updateLayout(mMessage);
}
protected int getLayoutResId() {
return R.layout.cell_broadcast_alert_fullscreen;
}
private void updateLayout(CellBroadcastMessage message) {
LayoutInflater inflater = LayoutInflater.from(this);
setContentView(inflater.inflate(getLayoutResId(), null));
/* Initialize dialog text from alert message. */
int titleId = CellBroadcastResources.getDialogTitleResource(message);
setTitle(titleId);
((TextView) findViewById(R.id.alertTitle)).setText(titleId);
((TextView) findViewById(R.id.message)).setText(message.getMessageBody());
/* dismiss button: close notification */
findViewById(R.id.dismissButton).setOnClickListener(
new Button.OnClickListener() {
public void onClick(View v) {
dismiss();
}
});
mIsEmergencyAlert = message.isPublicAlertMessage() || CellBroadcastConfigService
.isOperatorDefinedEmergencyId(message.getServiceCategory());
if (mIsEmergencyAlert) {
mWarningIcon = getResources().getDrawable(R.drawable.ic_warning_large);
mWarningIconView = (ImageView) findViewById(R.id.icon);
if (mWarningIconView != null) {
mWarningIconView.setImageDrawable(mWarningIcon);
}
// Dismiss the notification that brought us here
((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE))
.cancel((int) message.getDeliveryTime());
}
}
/**
* Start animating warning icon.
*/
@Override
protected void onStart() {
super.onStart();
if (mIsEmergencyAlert) {
// start icon animation
mAnimationHandler.sendEmptyMessageDelayed(0, WARNING_ICON_ON_DURATION_MSEC);
}
}
/**
* Stop animating warning icon and stop the {@link CellBroadcastAlertAudio}
* service if necessary.
*/
void dismiss() {
// Stop playing alert sound/vibration/speech (if started)
stopService(new Intent(this, CellBroadcastAlertAudio.class));
final long deliveryTime = mMessage.getDeliveryTime();
// Mark broadcast as read on a background thread.
new CellBroadcastContentProvider.AsyncCellBroadcastTask(getContentResolver())
.execute(new CellBroadcastContentProvider.CellBroadcastOperation() {
@Override
public boolean execute(CellBroadcastContentProvider provider) {
return provider.markBroadcastRead(
Telephony.CellBroadcasts.DELIVERY_TIME, deliveryTime);
}
});
if (mIsEmergencyAlert) {
// stop animating emergency alert icon
mStopAnimation = true;
} else {
// decrement unread non-emergency alert count
CellBroadcastReceiverApp.decrementUnreadAlertCount();
}
finish();
}
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
switch (event.getKeyCode()) {
// Volume keys and camera keys mute the alert sound/vibration.
case KeyEvent.KEYCODE_VOLUME_UP:
case KeyEvent.KEYCODE_VOLUME_DOWN:
case KeyEvent.KEYCODE_VOLUME_MUTE:
case KeyEvent.KEYCODE_CAMERA:
case KeyEvent.KEYCODE_FOCUS:
// Stop playing alert sound/vibration/speech (if started)
stopService(new Intent(this, CellBroadcastAlertAudio.class));
return true;
default:
break;
}
return super.dispatchKeyEvent(event);
}
/**
* Ignore the back button for emergency alerts (overridden by alert dialog so that the dialog
* is dismissed).
*/
@Override
public void onBackPressed() {
// ignored
}
}
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