/*
* Copyright (C) 2009 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.bluetooth;
import com.android.settings.R;
import android.app.Activity;
import android.app.AlertDialog;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
/**
* RequestPermissionActivity asks the user whether to enable discovery. This is
* usually started by an application wanted to start bluetooth and or discovery
*/
public class RequestPermissionActivity extends Activity implements
DialogInterface.OnClickListener {
// Command line to test this
// adb shell am start -a android.bluetooth.adapter.action.REQUEST_ENABLE
// adb shell am start -a android.bluetooth.adapter.action.REQUEST_DISCOVERABLE
private static final String TAG = "RequestPermissionActivity";
private static final int MAX_DISCOVERABLE_TIMEOUT = 3600; // 1 hr
// Non-error return code: BT is starting or has started successfully. Used
// by this Activity and RequestPermissionHelperActivity
/* package */ static final int RESULT_BT_STARTING_OR_STARTED = -1000;
private static final int REQUEST_CODE_START_BT = 1;
private LocalBluetoothAdapter mLocalAdapter;
private int mTimeout = BluetoothDiscoverableEnabler.DEFAULT_DISCOVERABLE_TIMEOUT;
/*
* True if bluetooth wasn't enabled and RequestPermissionHelperActivity was
* started to ask the user and start bt.
*
* If/when that activity returns successfully, display please wait msg then
* go away when bt has started and discovery mode has been enabled.
*/
private boolean mNeededToEnableBluetooth;
// True if requesting BT to be turned on
// False if requesting BT to be turned on + discoverable mode
private boolean mEnableOnly;
private boolean mUserConfirmed;
private AlertDialog mDialog;
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent == null) {
return;
}
if (mNeededToEnableBluetooth
&& BluetoothAdapter.ACTION_STATE_CHANGED.equals(intent.getAction())) {
int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothDevice.ERROR);
if (state == BluetoothAdapter.STATE_ON) {
if (mUserConfirmed) {
proceedAndFinish();
}
}
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Note: initializes mLocalAdapter and returns true on error
if (parseIntent()) {
finish();
return;
}
int btState = mLocalAdapter.getState();
switch (btState) {
case BluetoothAdapter.STATE_OFF:
case BluetoothAdapter.STATE_TURNING_OFF:
case BluetoothAdapter.STATE_TURNING_ON:
/*
* Strictly speaking STATE_TURNING_ON belong with STATE_ON;
* however, BT may not be ready when the user clicks yes and we
* would fail to turn on discovery mode. By kicking this to the
* RequestPermissionHelperActivity, this class will handle that
* case via the broadcast receiver.
*/
/*
* Start the helper activity to:
* 1) ask the user about enabling bt AND discovery
* 2) enable BT upon confirmation
*/
registerReceiver(mReceiver,
new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED));
Intent intent = new Intent();
intent.setClass(this, RequestPermissionHelperActivity.class);
if (mEnableOnly) {
intent.setAction(RequestPermissionHelperActivity.ACTION_INTERNAL_REQUEST_BT_ON);
} else {
intent.setAction(RequestPermissionHelperActivity.
ACTION_INTERNAL_REQUEST_BT_ON_AND_DISCOVERABLE);
intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, mTimeout);
}
startActivityForResult(intent, REQUEST_CODE_START_BT);
mNeededToEnableBluetooth = true;
break;
case BluetoothAdapter.STATE_ON:
if (mEnableOnly) {
// Nothing to do. Already enabled.
proceedAndFinish();
} else {
// Ask the user about enabling discovery mode
createDialog();
}
break;
default:
Log.e(TAG, "Unknown adapter state: " + btState);
}
}
private void createDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setIcon(android.R.drawable.ic_dialog_info);
builder.setTitle(getString(R.string.bluetooth_permission_request));
if (mNeededToEnableBluetooth) {
// RequestPermissionHelperActivity has gotten confirmation from user
// to turn on BT
builder.setMessage(getString(R.string.bluetooth_turning_on));
builder.setCancelable(false);
} else {
// Ask the user whether to turn on discovery mode or not
// For lasting discoverable mode there is a different message
if (mTimeout == BluetoothDiscoverableEnabler.DISCOVERABLE_TIMEOUT_NEVER) {
builder.setMessage(
getString(R.string.bluetooth_ask_lasting_discovery));
} else {
builder.setMessage(
getString(R.string.bluetooth_ask_discovery, mTimeout));
}
builder.setPositiveButton(getString(R.string.yes), this);
builder.setNegativeButton(getString(R.string.no), this);
}
mDialog = builder.create();
mDialog.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode != REQUEST_CODE_START_BT) {
Log.e(TAG, "Unexpected onActivityResult " + requestCode + ' ' + resultCode);
setResult(RESULT_CANCELED);
finish();
return;
}
if (resultCode != RESULT_BT_STARTING_OR_STARTED) {
setResult(resultCode);
finish();
return;
}
// Back from RequestPermissionHelperActivity. User confirmed to enable
// BT and discoverable mode.
mUserConfirmed = true;
if (mLocalAdapter.getBluetoothState() == BluetoothAdapter.STATE_ON) {
proceedAndFinish();
} else {
// If BT is not up yet, show "Turning on Bluetooth..."
createDialog();
}
}
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case DialogInterface.BUTTON_POSITIVE:
proceedAndFinish();
break;
case DialogInterface.BUTTON_NEGATIVE:
setResult(RESULT_CANCELED);
finish();
break;
}
}
private void proceedAndFinish() {
int returnCode;
if (mEnableOnly) {
// BT enabled. Done
returnCode = RESULT_OK;
} else if (mLocalAdapter.setScanMode(
BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE, mTimeout)) {
// If already in discoverable mode, this will extend the timeout.
LocalBluetoothPreferences.persistDiscoverableEndTimestamp(
this, System.currentTimeMillis() + (long) mTimeout * 1000);
returnCode = mTimeout;
// Activity.RESULT_FIRST_USER should be 1
if (returnCode < RESULT_FIRST_USER) {
returnCode = RESULT_FIRST_USER;
}
} else {
returnCode = RESULT_CANCELED;
}
if (mDialog != null) {
mDialog.dismiss();
}
setResult(returnCode);
finish();
}
/**
* Parse the received Intent and initialize mLocalBluetoothAdapter.
* @return true if an error occurred; false otherwise
*/
private boolean parseIntent() {
Intent intent = getIntent();
if (intent != null && intent.getAction().equals(BluetoothAdapter.ACTION_REQUEST_ENABLE)) {
mEnableOnly = true;
} else if (intent != null
&& intent.getAction().equals(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE)) {
mTimeout = intent.getIntExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,
BluetoothDiscoverableEnabler.DEFAULT_DISCOVERABLE_TIMEOUT);
Log.d(TAG, "Setting Bluetooth Discoverable Timeout = " + mTimeout);
if (mTimeout < 0 || mTimeout > MAX_DISCOVERABLE_TIMEOUT) {
mTimeout = BluetoothDiscoverableEnabler.DEFAULT_DISCOVERABLE_TIMEOUT;
}
} else {
Log.e(TAG, "Error: this activity may be started only with intent "
+ BluetoothAdapter.ACTION_REQUEST_ENABLE + " or "
+ BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
setResult(RESULT_CANCELED);
return true;
}
LocalBluetoothManager manager = LocalBluetoothManager.getInstance(this);
if (manager == null) {
Log.e(TAG, "Error: there's a problem starting Bluetooth");
setResult(RESULT_CANCELED);
return true;
}
mLocalAdapter = manager.getBluetoothAdapter();
return false;
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mNeededToEnableBluetooth) {
unregisterReceiver(mReceiver);
}
}
@Override
public void onBackPressed() {
setResult(RESULT_CANCELED);
super.onBackPressed();
}
}