本文实例讲述了android源码探索之定制android关机界面的方法。分享给大家供大家参考。具体如下:
在android系统中,长按power键默认会弹出对话框让你选择“飞行模式”,“静音”,“关机”等功能。如下图所示:
但这些功能都对android-x86和其他终端产品就没什么必要了。本文就简单介绍下如何定制关机界面。
我的目标是长按power键,将会关机,弹出“设备将要关机”选择对话框。如果可以选择“是”关机,和“否”返回系统。
按照android源码定制要点中提到的,首先你要对整个系统有全面的了解,找到弹出原来这个选择框的代码,它在这里:
<pre name="code" class="java">frameworks\policies\base\phone\com\android\internal\policy\impl\phonewindowmanager.java
显示对话框调用的代码如下:
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runnable mpowerlongpress = new runnable() {
public void run() {
mshouldturnoffonkeyup = false ;
performhapticfeedbacklw( null , hapticfeedbackconstants.long_press, false );
sendclosesystemwindows(system_dialog_reason_global_actions);
showglobalactionsdialog();
}
};
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调用showglobalactionsdialog方法之后将会聚到有“飞行模式”、“静音”、“关机”等选项的对话框。
找到这里,我们就知道该做什么了!干掉它,换成我们想要的关机代码,就大功告成了!既然这样,事不宜迟,让我们赶快到showgloabalactiondialog方法中看看关机的部分在哪里!
showglobalactionsdialog的实现部分在这里:
frameworks\policies\base\phone\com\android\internal\policy\impl\globalaction.java
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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();
}
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我们可以很清楚的看到,这里新建了一个mdialog,然后prepare接着就show了它,那么,这个mdialog就是关键了,看看它是怎么被createdialog创建出来的吧,仍然在这个文件中:
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/**
* 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;
}
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看看我们发现了什么!!蓝色的部分就是关机调用的函数了!!shutdown方法的第二个参数标识是否弹出询问对话框。你可以选择需要(true)或者不需要(false)。这里我保守一点,还是选个true吧,万一不小心按到关机键呢,呵呵。。。
也就是说,只要我们用
替换掉前面的
就可以大功告成了!还等什么!我们修改
frameworks\policies\base\phone\com\android\internal\policy\impl\phonewindowmanager.java
的源代码如下:
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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 );
}
};
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好了,大功告成了!!
是不是就这样完了呢?发现编译不过。。。
细节很重要!!
原来shutdownthread.shutdown(mcontext, true)的引用包没加进来!!幸好有gcc。。。
将上面这个包加到
frameworks\policies\base\phone\com\android\internal\policy\impl\phonewindowmanager.java
中,再次编译,通过,yes!
看看我们的战果吧:
是不是感觉到源码定制的快感和成就感了呢?
这仅仅只是个开始,好戏还在后头呢!!哈哈
希望本文所述对大家的android程序设计有所帮助。