Java tutorial
/* * Copyright (C) 2014 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.tv.settings.accessories; import com.android.tv.settings.R; import com.android.tv.settings.dialog.old.Action; import com.android.tv.settings.dialog.old.ActionAdapter; import com.android.tv.settings.dialog.old.ActionFragment; import com.android.tv.settings.dialog.old.DialogActivity; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.bluetooth.BluetoothDevice; import android.content.Intent; import android.graphics.drawable.AnimationDrawable; import android.hardware.input.InputManager; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.os.RemoteException; import android.os.ServiceManager; import android.os.SystemClock; import android.service.dreams.DreamService; import android.service.dreams.IDreamManager; import android.support.v4.view.ViewCompat; import android.util.Log; import android.view.KeyEvent; import android.view.View; import android.view.ViewGroup; import android.view.ViewTreeObserver; import android.view.animation.DecelerateInterpolator; import android.widget.FrameLayout; import android.widget.ImageView; import android.widget.TextView; import java.util.ArrayList; /** * Activity for detecting and adding (pairing) new bluetooth devices. */ public class AddAccessoryActivity extends DialogActivity implements ActionAdapter.Listener, InputPairer.EventListener { private static final boolean DEBUG = false; private static final String TAG = "aah.AddAccessoryActivity"; private static final String ACTION_CONNECT_INPUT = "com.google.android.intent.action.CONNECT_INPUT"; private static final String INTENT_EXTRA_NO_INPUT_MODE = "no_input_mode"; private static final String KEY_BT_DEVICE = "selected_bt_device"; private static final String ADDRESS_NONE = "NONE"; private static final int AUTOPAIR_COUNT = 10; private static final int MSG_UPDATE_VIEW = 1; private static final int MSG_REMOVE_CANCELED = 2; private static final int MSG_PAIRING_COMPLETE = 3; private static final int MSG_OP_TIMEOUT = 4; private static final int MSG_RESTART = 5; private static final int MSG_TRIGGER_SELECT_DOWN = 6; private static final int MSG_TRIGGER_SELECT_UP = 7; private static final int MSG_AUTOPAIR_TICK = 8; private static final int MSG_START_AUTOPAIR_COUNTDOWN = 9; private static final int MSG_MULTIPAIR_BLINK = 10; private static final int CANCEL_MESSAGE_TIMEOUT = 3000; private static final int DONE_MESSAGE_TIMEOUT = 3000; private static final int PAIR_OPERATION_TIMEOUT = 120000; private static final int CONNECT_OPERATION_TIMEOUT = 15000; private static final int RESTART_DELAY = 3000; private static final int LONG_PRESS_DURATION = 3000; private static final int KEY_DOWN_TIME = 150; private static final int TIME_TO_START_AUTOPAIR_COUNT = 5000; private static final int BLINK_START = 1000; private static final int EXIT_TIMEOUT_MILLIS = 90 * 1000; private ActionFragment mActionFragment; private ArrayList<Action> mActions; private AddAccessoryContentFragment mContentFragment; // members related to Bluetooth pairing private InputPairer mBtPairer; private int mPreviousStatus = InputPairer.STATUS_NONE; private boolean mPairingSuccess = false; private boolean mPairingBluetooth = false; private ArrayList<BluetoothDevice> mBtDevices; private String mCancelledAddress = ADDRESS_NONE; private String mCurrentTargetAddress = ADDRESS_NONE; private String mCurrentTargetStatus = ""; private boolean mPairingInBackground = false; private boolean mActionsVisible = false; private FrameLayout mTopLayout; private View mActionView; private View mContentView; private boolean mShowingMultiFragment; private TextView mAutoPairText; private AnimationDrawable mAnimation; private int mViewOffset = 0; private static final int ANIMATE_IN_DELAY = 1500; private static long mStartTime; private boolean mAnimateOnStart = true; private boolean mDone = false; private final Object mLock = new Object(); private FragmentManager mFragmentManager; private FragmentTransaction mFragmentTransaction; private IDreamManager mDreamManager; private boolean mHwKeyDown; private boolean mHwKeyDidSelect; private boolean mNoInputMode; private boolean mActionsAnimationDone; private boolean mFragmentTransactionPending; // Internal message handler private Handler mMsgHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case MSG_UPDATE_VIEW: updateView(); break; case MSG_REMOVE_CANCELED: mCancelledAddress = ADDRESS_NONE; updateView(); break; case MSG_PAIRING_COMPLETE: AddAccessoryActivity.this.finish(); break; case MSG_OP_TIMEOUT: handlePairingTimeout(); break; case MSG_RESTART: if (mBtPairer != null) { mBtPairer.start(); mBtPairer.cancelPairing(); } break; case MSG_TRIGGER_SELECT_DOWN: sendKeyEvent(KeyEvent.KEYCODE_DPAD_CENTER, true); mHwKeyDidSelect = true; sendEmptyMessageDelayed(MSG_TRIGGER_SELECT_UP, KEY_DOWN_TIME); cancelPairingCountdown(); break; case MSG_TRIGGER_SELECT_UP: sendKeyEvent(KeyEvent.KEYCODE_DPAD_CENTER, false); break; case MSG_START_AUTOPAIR_COUNTDOWN: mAutoPairText.setVisibility(View.VISIBLE); mAutoPairText.setText(String.format(getString(R.string.accessories_autopair_msg), AUTOPAIR_COUNT)); sendMessageDelayed(mMsgHandler.obtainMessage(MSG_AUTOPAIR_TICK, AUTOPAIR_COUNT, 0, null), 1000); break; case MSG_AUTOPAIR_TICK: int countToAutoPair = msg.arg1 - 1; if (mAutoPairText != null) { if (countToAutoPair <= 0) { mAutoPairText.setVisibility(View.GONE); // AutoPair startAutoPairing(); } else { mAutoPairText.setText( String.format(getString(R.string.accessories_autopair_msg), countToAutoPair)); sendMessageDelayed(mMsgHandler.obtainMessage(MSG_AUTOPAIR_TICK, countToAutoPair, 0, null), 1000); } } break; case MSG_MULTIPAIR_BLINK: // Kick off the blinking animation ImageView backImage = (ImageView) findViewById(R.id.back_panel_image); if (backImage != null) { mAnimation = (AnimationDrawable) backImage.getDrawable(); if (mAnimation != null) { mAnimation.start(); } } break; default: super.handleMessage(msg); } } }; private final Handler mAutoExitHandler = new Handler(); private final Runnable mAutoExitRunnable = new Runnable() { @Override public void run() { stopActivity(); } }; @Override public void onCreate(Bundle savedInstanceState) { setLayoutProperties(R.layout.add_accessory_custom_two_pane_dialog, R.id.content_fragment, R.id.action_fragment); super.onCreate(savedInstanceState); mDreamManager = IDreamManager.Stub.asInterface(ServiceManager.checkService(DreamService.DREAM_SERVICE)); mFragmentManager = getFragmentManager(); mBtDevices = new ArrayList<BluetoothDevice>(); mActions = new ArrayList<Action>(); mNoInputMode = getIntent().getBooleanExtra(INTENT_EXTRA_NO_INPUT_MODE, false); mHwKeyDown = false; mActions.clear(); mActionFragment = ActionFragment.newInstance(mActions); mContentFragment = AddAccessoryContentFragment.newInstance(false); setContentAndActionFragments(mContentFragment, mActionFragment); mShowingMultiFragment = false; mActionsAnimationDone = false; mFragmentTransactionPending = false; } @Override protected void onStart() { super.onStart(); if (DEBUG) { Log.d(TAG, "onStart() mPairingInBackground = " + mPairingInBackground); } // Only do the following if we are not coming back to this activity from // the Secure Pairing activity. if (!mPairingInBackground) { if (mAnimateOnStart) { mAnimateOnStart = false; ViewGroup contentView = (ViewGroup) findViewById(android.R.id.content); mTopLayout = (FrameLayout) contentView.getChildAt(0); // Fade out the old activity, and fade in the new activity. overridePendingTransition(R.anim.fade_in, R.anim.fade_out); // Set the activity background int bgColor = getResources().getColor(R.color.dialog_activity_background); getBackgroundDrawable().setColor(bgColor); mTopLayout.setBackground(getBackgroundDrawable()); // Delay the rest of the changes until the first layout event mTopLayout.getViewTreeObserver() .addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() { @Override public void onGlobalLayout() { mTopLayout.getViewTreeObserver().removeOnGlobalLayoutListener(this); // set the Action and Content fragments to their start offsets mActionView = findViewById(R.id.action_fragment); mContentView = findViewById(R.id.content_fragment); if (mActionView != null) { mViewOffset = mActionView.getMeasuredWidth(); int offset = (ViewCompat .getLayoutDirection(mActionView) == View.LAYOUT_DIRECTION_RTL) ? -mViewOffset : mViewOffset; mActionView.setTranslationX(offset); mContentView.setTranslationX(offset / 2); } mAutoPairText = (TextView) findViewById(R.id.autopair_message); if (mAutoPairText != null) { mAutoPairText.setVisibility(View.GONE); } updateView(); } }); } startBluetoothPairer(); mStartTime = SystemClock.elapsedRealtime(); } mPairingInBackground = false; } @Override public void onPause() { super.onPause(); if (DEBUG) Log.d(TAG, "stopping auto-exit timer"); mAutoExitHandler.removeCallbacks(mAutoExitRunnable); } @Override public void onResume() { super.onResume(); if (mNoInputMode) { // Start timer count down for exiting activity. if (DEBUG) Log.d(TAG, "starting auto-exit timer"); mAutoExitHandler.postDelayed(mAutoExitRunnable, EXIT_TIMEOUT_MILLIS); } } @Override public void onStop() { if (DEBUG) { Log.d(TAG, "onStop()"); } if (!mPairingBluetooth) { stopActivity(); } else { // allow activity to remain in the background while we perform the // BT Secure pairing. mPairingInBackground = true; } super.onStop(); } @Override public boolean onKeyUp(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK || keyCode == KeyEvent.KEYCODE_HOME) { if (mPairingBluetooth && !mDone) { cancelBtPairing(); } } return super.onKeyUp(keyCode, event); } @Override public void onNewIntent(Intent intent) { if (ACTION_CONNECT_INPUT.equals(intent.getAction()) && (intent.getFlags() & Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT) == 0) { // We were the front most app and we got a new intent. // If screen saver is going, stop it. try { if (mDreamManager != null && mDreamManager.isDreaming()) { mDreamManager.awaken(); } } catch (RemoteException e) { // Do nothing. } KeyEvent event = intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT); if (event != null && event.getKeyCode() == KeyEvent.KEYCODE_PAIRING) { if (event.getAction() == KeyEvent.ACTION_UP) { onHwKeyEvent(false); } else if (event.getAction() == KeyEvent.ACTION_DOWN) { onHwKeyEvent(true); } } } else { setIntent(intent); } } @Override protected void onIntroAnimationFinished() { mActionsAnimationDone = true; if (mFragmentTransactionPending) { mFragmentTransactionPending = false; switchToMultipleDevicesFragment(); } } @Override public void onActionClicked(Action action) { cancelPairingCountdown(); if (!mDone) { String key = action.getKey(); if (KEY_BT_DEVICE.equals(key)) { btDeviceClicked(action.getDescription()); } } } // Events related to a device HW key protected void onHwKeyEvent(boolean keyDown) { if (!mHwKeyDown) { // HW key was in UP state before if (keyDown) { // Back key pressed down mHwKeyDown = true; mHwKeyDidSelect = false; mMsgHandler.sendEmptyMessageDelayed(MSG_TRIGGER_SELECT_DOWN, LONG_PRESS_DURATION); } } else { // HW key was in DOWN state before if (!keyDown) { // HW key released mHwKeyDown = false; mMsgHandler.removeMessages(MSG_TRIGGER_SELECT_DOWN); if (!mHwKeyDidSelect) { // key wasn't pressed long enough for selection, move selection // to next item. int selectedIndex = mActionFragment.getSelectedItemPosition() + 1; if (selectedIndex >= mActions.size()) { selectedIndex = 0; } mActionFragment.setSelectionSmooth(selectedIndex); } mHwKeyDidSelect = false; } } } private void sendKeyEvent(int keyCode, boolean down) { InputManager iMgr = (InputManager) getSystemService(INPUT_SERVICE); if (iMgr != null) { long time = SystemClock.uptimeMillis(); KeyEvent evt = new KeyEvent(time, time, down ? KeyEvent.ACTION_DOWN : KeyEvent.ACTION_UP, keyCode, 0); iMgr.injectInputEvent(evt, InputManager.INJECT_INPUT_EVENT_MODE_ASYNC); } } protected void updateView() { if (mActionView == null || mStartTime == 0) { // view not yet ready, update will happen on first layout event return; } synchronized (mLock) { int prevNumDevices = mActions.size(); mActions.clear(); if (mActionFragment != null && mBtPairer != null) { // Add entries for the discovered Bluetooth devices for (BluetoothDevice bt : mBtDevices) { String title = bt.getName(); String desc; if (mCurrentTargetAddress.equalsIgnoreCase(bt.getAddress()) && !mCurrentTargetStatus.isEmpty()) { desc = mCurrentTargetStatus; } else if (mCancelledAddress.equalsIgnoreCase(bt.getAddress())) { desc = getString(R.string.accessory_state_canceled); } else { desc = bt.getAddress(); } mActions.add( new Action.Builder().key(KEY_BT_DEVICE).title(title).description(desc.toUpperCase()) .drawableResource(AccessoryUtils.getImageIdForDevice(bt)).build()); } } // Update the main fragment. ActionAdapter adapter = (ActionAdapter) mActionFragment.getAdapter(); if (adapter != null) { adapter.setActions(mActions); } if (!mActionsVisible && mActions.size() > 0) { mActionsVisible = true; long delay = ANIMATE_IN_DELAY - (SystemClock.elapsedRealtime() - mStartTime); if (delay > 0) { // Make sure we have a little bit of time after the activity // fades in // before we animate the actions in mActionView.postDelayed(new Runnable() { @Override public void run() { animateActionsIn(); } }, delay); } else { animateActionsIn(); } } if (mNoInputMode) { if (DEBUG) Log.d(TAG, "stopping auto-exit timer"); mAutoExitHandler.removeCallbacks(mAutoExitRunnable); if (mActions.size() == 1 && prevNumDevices == 0) { // first device added, start counter for autopair mMsgHandler.sendEmptyMessageDelayed(MSG_START_AUTOPAIR_COUNTDOWN, TIME_TO_START_AUTOPAIR_COUNT); } else { // Start timer count down for exiting activity. if (DEBUG) Log.d(TAG, "starting auto-exit timer"); mAutoExitHandler.postDelayed(mAutoExitRunnable, EXIT_TIMEOUT_MILLIS); if (mActions.size() > 1) { // More than one device found, cancel auto pair cancelPairingCountdown(); if (!mShowingMultiFragment && !mFragmentTransactionPending) { if (mActionsAnimationDone) { switchToMultipleDevicesFragment(); } else { mFragmentTransactionPending = true; } } } } } } } private void cancelPairingCountdown() { // Cancel countdown mMsgHandler.removeMessages(MSG_AUTOPAIR_TICK); mMsgHandler.removeMessages(MSG_START_AUTOPAIR_COUNTDOWN); if (mAutoPairText != null) { mAutoPairText.setVisibility(View.GONE); } } protected void switchToMultipleDevicesFragment() { FragmentTransaction ft = mFragmentManager.beginTransaction(); mContentFragment = AddAccessoryContentFragment.newInstance(true); ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN); ft.replace(R.id.content_fragment, mContentFragment); ft.disallowAddToBackStack(); ft.commit(); mMsgHandler.sendEmptyMessageDelayed(MSG_MULTIPAIR_BLINK, BLINK_START); mShowingMultiFragment = true; } private void setTimeout(int timeout) { cancelTimeout(); mMsgHandler.sendEmptyMessageDelayed(MSG_OP_TIMEOUT, timeout); } private void cancelTimeout() { mMsgHandler.removeMessages(MSG_OP_TIMEOUT); } private void animateActionsIn() { prepareAndAnimateView(mContentView, 1f, mViewOffset / 2, 0, ANIMATE_IN_DURATION, new DecelerateInterpolator(1.0f), true); prepareAndAnimateView(mActionView, 1f, mViewOffset, 0, ANIMATE_IN_DURATION, new DecelerateInterpolator(1.0f), false); } protected void startAutoPairing() { if (mActions.size() > 0) { onActionClicked(mActions.get(0)); } } private void btDeviceClicked(String clickedAddress) { if (mBtPairer != null && !mBtPairer.isInProgress()) { if (mBtPairer.getStatus() == InputPairer.STATUS_WAITING_TO_PAIR && mBtPairer.getTargetDevice() != null) { cancelBtPairing(); } else { if (DEBUG) { Log.d(TAG, "Looking for " + clickedAddress + " in available devices to start pairing"); } for (BluetoothDevice target : mBtDevices) { if (target.getAddress().equalsIgnoreCase(clickedAddress)) { if (DEBUG) { Log.d(TAG, "Found it!"); } mCancelledAddress = ADDRESS_NONE; setPairingBluetooth(true); mBtPairer.startPairing(target); break; } } } } } private void cancelBtPairing() { // cancel current request to pair if (mBtPairer != null) { if (mBtPairer.getTargetDevice() != null) { mCancelledAddress = mBtPairer.getTargetDevice().getAddress(); } else { mCancelledAddress = ADDRESS_NONE; } mBtPairer.cancelPairing(); } mPairingSuccess = false; setPairingBluetooth(false); mMsgHandler.sendEmptyMessageDelayed(MSG_REMOVE_CANCELED, CANCEL_MESSAGE_TIMEOUT); } private void setPairingBluetooth(boolean pairing) { if (mPairingBluetooth != pairing) { mPairingBluetooth = pairing; } } private void startBluetoothPairer() { stopBluetoothPairer(); mBtPairer = new InputPairer(this, this); mBtPairer.start(); // Disable auto-pairing mBtPairer.cancelPairing(); mPairingSuccess = false; statusChanged(); } private void stopBluetoothPairer() { if (mBtPairer != null) { mBtPairer.setListener(null); mBtPairer.dispose(); mBtPairer = null; } } private String getMessageForStatus(int status) { int msgId = 0; String msg; switch (status) { case InputPairer.STATUS_WAITING_TO_PAIR: case InputPairer.STATUS_PAIRING: msgId = R.string.accessory_state_pairing; break; case InputPairer.STATUS_CONNECTING: msgId = R.string.accessory_state_connecting; break; case InputPairer.STATUS_ERROR: msgId = R.string.accessory_state_error; break; default: return ""; } msg = getString(msgId); return msg; } @Override public void statusChanged() { synchronized (mLock) { if (mBtPairer == null) return; int numDevices = mBtPairer.getAvailableDevices().size(); int status = mBtPairer.getStatus(); int oldStatus = mPreviousStatus; mPreviousStatus = status; String address = mBtPairer.getTargetDevice() == null ? ADDRESS_NONE : mBtPairer.getTargetDevice().getAddress(); if (DEBUG) { String state = "?"; switch (status) { case InputPairer.STATUS_NONE: state = "InputPairer.STATUS_NONE"; break; case InputPairer.STATUS_SCANNING: state = "InputPairer.STATUS_SCANNING"; break; case InputPairer.STATUS_WAITING_TO_PAIR: state = "InputPairer.STATUS_WAITING_TO_PAIR"; break; case InputPairer.STATUS_PAIRING: state = "InputPairer.STATUS_PAIRING"; break; case InputPairer.STATUS_CONNECTING: state = "InputPairer.STATUS_CONNECTING"; break; case InputPairer.STATUS_ERROR: state = "InputPairer.STATUS_ERROR"; break; } long time = mBtPairer.getNextStageTime() - SystemClock.elapsedRealtime(); Log.d(TAG, "Update received, number of devices:" + numDevices + " state: " + state + " target device: " + address + " time to next event: " + time); } mBtDevices.clear(); for (BluetoothDevice device : mBtPairer.getAvailableDevices()) { mBtDevices.add(device); } cancelTimeout(); switch (status) { case InputPairer.STATUS_NONE: // if we just connected to something or just tried to connect // to something, restart scanning just in case the user wants // to pair another device. if (oldStatus == InputPairer.STATUS_CONNECTING) { if (mPairingSuccess) { // Pairing complete mCurrentTargetStatus = getString(R.string.accessory_state_paired); mMsgHandler.sendEmptyMessage(MSG_UPDATE_VIEW); mMsgHandler.sendEmptyMessageDelayed(MSG_PAIRING_COMPLETE, DONE_MESSAGE_TIMEOUT); mDone = true; if (mAnimation != null) { mAnimation.setOneShot(true); } // Done, return here and just wait for the message // to close the activity return; } if (DEBUG) { Log.d(TAG, "Invalidating and restarting."); } mBtPairer.invalidateDevice(mBtPairer.getTargetDevice()); mBtPairer.start(); mBtPairer.cancelPairing(); setPairingBluetooth(false); // if this looks like a successful connection run, reflect // this in the UI, otherwise use the default message if (!mPairingSuccess && InputPairer.hasValidInputDevice(this)) { mPairingSuccess = true; } } break; case InputPairer.STATUS_SCANNING: mPairingSuccess = false; break; case InputPairer.STATUS_WAITING_TO_PAIR: break; case InputPairer.STATUS_PAIRING: // reset the pairing success value since this is now a new // pairing run mPairingSuccess = true; setTimeout(PAIR_OPERATION_TIMEOUT); break; case InputPairer.STATUS_CONNECTING: setTimeout(CONNECT_OPERATION_TIMEOUT); break; case InputPairer.STATUS_ERROR: mPairingSuccess = false; setPairingBluetooth(false); if (mNoInputMode) { clearDeviceList(); } break; } mCurrentTargetAddress = address; mCurrentTargetStatus = getMessageForStatus(status); mMsgHandler.sendEmptyMessage(MSG_UPDATE_VIEW); } } private void clearDeviceList() { mBtDevices.clear(); mBtPairer.clearDeviceList(); } private void stopActivity() { stopBluetoothPairer(); mMsgHandler.removeCallbacksAndMessages(null); mAnimateOnStart = true; // Forcing this activity to finish in OnStop, to make sure it always gets created // fresh, since it has different behavior depending on the intent that launched // it (Settings vs HW button press). Log.d(TAG, "Calling finish() on activity.onStop()."); finish(); } private void handlePairingTimeout() { if (mPairingInBackground) { stopActivity(); } else { // Either Pairing or Connecting timeout out. // Display error message and post delayed message to the scanning process. mPairingSuccess = false; if (mBtPairer != null) { mBtPairer.cancelPairing(); } mCurrentTargetStatus = getString(R.string.accessory_state_error); mMsgHandler.sendEmptyMessage(MSG_UPDATE_VIEW); mMsgHandler.sendEmptyMessageDelayed(MSG_RESTART, RESTART_DELAY); } } }