本文實(shí)例講述了android源碼探索之定制android關(guān)機(jī)界面的方法。分享給大家供大家參考。具體如下：
在Android系統(tǒng)中，長(zhǎng)按Power鍵默認(rèn)會(huì)彈出對(duì)話框讓你選擇“飛行模式”，“靜音”，“關(guān)機(jī)”等功能。如下圖所示：
但這些功能都對(duì)Android-x86和其他終端產(chǎn)品就沒(méi)什么必要了。本文就簡(jiǎn)單介紹下如何定制關(guān)機(jī)界面。
我的目標(biāo)是長(zhǎng)按Power鍵，將會(huì)關(guān)機(jī)，彈出“設(shè)備將要關(guān)機(jī)”選擇對(duì)話框。如果可以選擇“是”關(guān)機(jī)，和“否”返回系統(tǒng)。
按照android源碼定制要點(diǎn)中提到的，首先你要對(duì)整個(gè)系統(tǒng)有全面的了解，找到彈出原來(lái)這個(gè)選擇框的代碼，它在這里：
<pre name="code" class="java">frameworks/policies/base/phone/com/android/internal/policy/impl/PhoneWindowManager.java
顯示對(duì)話框調(diào)用的代碼如下：
Runnable mPowerLongPress = new Runnable() { public void run() { mShouldTurnOffOnKeyUp = false; performHapticFeedbackLw(null, HapticFeedbackConstants.LONG_PRESS, false); sendCloseSystemWindows(SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS); showGlobalActionsDialog(); }};調(diào)用showGlobalActionsDialog方法之后將會(huì)聚到有“飛行模式”、“靜音”、“關(guān)機(jī)”等選項(xiàng)的對(duì)話框。
找到這里，我們就知道該做什么了！干掉它，換成我們想要的關(guān)機(jī)代碼，就大功告成了！既然這樣，事不宜遲，讓我們趕快到showGloabalActionDialog方法中看看關(guān)機(jī)的部分在哪里！
showGlobalActionsDialog的實(shí)現(xiàn)部分在這里：
frameworks/policies/base/phone/com/android/internal/policy/impl/GlobalAction.java
public void showDialog(boolean keyguardShowing, boolean isDeviceProvisioned) { mKeyguardShowing = keyguardShowing; mDeviceProvisioned = isDeviceProvisioned; if (mDialog == null) { mStatusBar = (StatusBarManager)mContext.getSystemService(Context.STATUS_BAR_SERVICE); mDialog = createDialog(); } prepareDialog(); mStatusBar.disable(StatusBarManager.DISABLE_EXPAND); mDialog.show(); }我們可以很清楚的看到，這里新建了一個(gè)mDialog，然后prepare接著就show了它，那么，這個(gè)mDialog就是關(guān)鍵了，看看它是怎么被createDialog創(chuàng)建出來(lái)的吧，仍然在這個(gè)文件中：
/** * Create the global actions dialog. * @return A new dialog. */ private AlertDialog createDialog() { mSilentModeToggle = new ToggleAction( R.drawable.ic_lock_silent_mode, R.drawable.ic_lock_silent_mode_off, R.string.global_action_toggle_silent_mode, R.string.global_action_silent_mode_on_status, R.string.global_action_silent_mode_off_status) { void willCreate() { // XXX: FIXME: switch to ic_lock_vibrate_mode when available mEnabledIconResId = (Settings.System.getInt(mContext.getContentResolver(), Settings.System.VIBRATE_IN_SILENT, 1) == 1) ? R.drawable.ic_lock_silent_mode_vibrate : R.drawable.ic_lock_silent_mode; } void onToggle(boolean on) { if (on) { mAudioManager.setRingerMode((Settings.System.getInt(mContext.getContentResolver(), Settings.System.VIBRATE_IN_SILENT, 1) == 1) ? AudioManager.RINGER_MODE_VIBRATE : AudioManager.RINGER_MODE_SILENT); } else { mAudioManager.setRingerMode(AudioManager.RINGER_MODE_NORMAL); } } public boolean showDuringKeyguard() { return true; } public boolean showBeforeProvisioning() { return false; } }; mAirplaneModeOn = new ToggleAction( R.drawable.ic_lock_airplane_mode, R.drawable.ic_lock_airplane_mode_off, R.string.global_actions_toggle_airplane_mode, R.string.global_actions_airplane_mode_on_status, R.string.global_actions_airplane_mode_off_status) { void onToggle(boolean on) { if (Boolean.parseBoolean( SystemProperties.get(TelephonyProperties.PROPERTY_INECM_MODE))) { mIsWaitingForEcmExit = true; // Launch ECM exit dialog Intent ecmDialogIntent = new Intent(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS, null); ecmDialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); mContext.startActivity(ecmDialogIntent); } else { changeAirplaneModeSystemSetting(on); } } @Override protected void changeStateFromPress(boolean buttonOn) { // In ECM mode airplane state cannot be changed if (!(Boolean.parseBoolean( SystemProperties.get(TelephonyProperties.PROPERTY_INECM_MODE)))) { mState = buttonOn ? State.TurningOn : State.TurningOff; mAirplaneState = mState; } } public boolean showDuringKeyguard() { return true; } public boolean showBeforeProvisioning() { return false; } }; <span style="color:#ff0000;">mItems = Lists.newArrayList( // silent mode mSilentModeToggle, // next: airplane mode mAirplaneModeOn, // last: power off new SinglePressAction( com.android.internal.R.drawable.ic_lock_power_off, R.string.global_action_power_off) { </span><span style="color:#3333ff;"><u>public void onPress() { // shutdown by making sure radio and power are handled accordingly. ShutdownThread.shutdown(mContext, true); }</u></span><span style="color:#ff0000;"> public boolean showDuringKeyguard() { return true; } public boolean showBeforeProvisioning() { return true; }</span> }); mAdapter = new MyAdapter(); final AlertDialog.Builder ab = new AlertDialog.Builder(mContext); ab.setAdapter(mAdapter, this) .setInverseBackgroundForced(true) .setTitle(R.string.global_actions); final AlertDialog dialog = ab.create(); dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG); if (!mContext.getResources().getBoolean( com.android.internal.R.bool.config_sf_slowBlur)) { dialog.getWindow().setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND, WindowManager.LayoutParams.FLAG_BLUR_BEHIND); } dialog.setOnDismissListener(this); return dialog;}看看我們發(fā)現(xiàn)了什么！！藍(lán)色的部分就是關(guān)機(jī)調(diào)用的函數(shù)了！！shutdown方法的第二個(gè)參數(shù)標(biāo)識(shí)是否彈出詢問(wèn)對(duì)話框。你可以選擇需要（true）或者不需要（false）。這里我保守一點(diǎn)，還是選個(gè)true吧，萬(wàn)一不小心按到關(guān)機(jī)鍵呢，呵呵。。。
也就是說(shuō)，只要我們用
Runnable mPowerLongPress = new Runnable() { public void run() { mShouldTurnOffOnKeyUp = false; performHapticFeedbackLw(null, HapticFeedbackConstants.LONG_PRESS, false); sendCloseSystemWindows(SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS); //showGlobalActionsDialog(); ShutdownThread.shutdown(mContext, true); } };好了，大功告成了！！
是不是就這樣完了呢？發(fā)現(xiàn)編譯不過(guò)。。。
細(xì)節(jié)很重要！！
原來(lái)ShutdownThread.shutdown(mContext, true)的引用包沒(méi)加進(jìn)來(lái)！！幸好有g(shù)cc。。。
frameworks/policies/base/phone/com/android/internal/policy/impl/PhoneWindowManager.java
中，再次編譯，通過(guò)，YES！
看看我們的戰(zhàn)果吧：
是不是感覺(jué)到源碼定制的快感和成就感了呢？
這僅僅只是個(gè)開始，好戲還在后頭呢！！哈哈
希望本文所述對(duì)大家的Android程序設(shè)計(jì)有所幫助。
新聞熱點(diǎn)
疑難解答
圖片精選
