如何在系统settings里添加设置选项

目的：在通话设置菜单下，添加一dect设置菜单，里面再添加一checkBOxPreference

来使能硬件模块。

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目前做的项目，需要在系统settings里面添加一选项来使能硬件模块，里面涉及到的preference知识，请网上了解，这里记录下方法。

1,settings 应用一般在 目录：\packages\apps\Settings,我们先找到通话设置的布局位置，看看它在那个包路径下，进入\packages\apps\Settings\res\xml，打开settings.xml文件：

Java代码

<com.android.settings.IconPreferenceScreen

android:key="call_settings"

settings:icon="@drawable/ic_settings_call"

android:title="@string/call_settings_title">

<intent

android:action="android.intent.action.MAIN"

android:targetPackage="com.android.phone"

android:targetClass="com.android.phone.CallFeaturesSetting" />

</com.android.settings.IconPreferenceScreen>

<com.android.settings.IconPreferenceScreen

android:key="call_settings"

settings:icon="@drawable/ic_settings_call"

android:title="@string/call_settings_title">

<intent

android:action="android.intent.action.MAIN"

android:targetPackage="com.android.phone"

android:targetClass="com.android.phone.CallFeaturesSetting" />

</com.android.settings.IconPreferenceScreen>

android:targetPackage="com.android.phone"

android:targetClass="com.android.phone.CallFeaturesSetting"

targetPackage：表示包名，根据此我们可以找到通话设置的路径。

targetClass：表示此布局文件被那个类所引用，根据此类，我们可以知道在那个文件里面管理我们的通话设置功能。 www.55zm.com

2.根据包名，我们可以看到在\packages\apps\Phone 目录下，进入\res\xml目录下

找到通话布局文件：call_feature_setting.xml，根据类名，很容易找到布局文件。

里面内容如下：

Java代码

<PreferenceCategory android:key="button_misc_category_key"

android:title="@string/other_settings"

android:persistent="false" />

<!-- Dect settings -->

<PreferenceScreen

android:key="dect_settings"

android:title="@string/dect_module_title"

android:summary="@string/dect_module_title" >

<intent

android:action="android.intent.action.MAIN"

android:targetPackage="com.android.phone"

android:targetClass="com.android.phone.DectSettings" />

</PreferenceScreen>

<CheckBoxPreference

android:key="button_auto_retry_key"

android:title="@string/auto_retry_mode_title"

android:persistent="false"

android:summary="@string/auto_retry_mode_summary"/>

<PreferenceCategory android:key="button_misc_category_key"

android:title="@string/other_settings"

android:persistent="false" />

<!-- Dect settings -->

<PreferenceScreen

android:key="dect_settings"

android:title="@string/dect_module_title"

android:summary="@string/dect_module_title" >

<intent

android:action="android.intent.action.MAIN"

android:targetPackage="com.android.phone"

android:targetClass="com.android.phone.DectSettings" />

</PreferenceScreen>

<CheckBoxPreference

android:key="button_auto_retry_key"

android:title="@string/auto_retry_mode_title"

android:persistent="false"

android:summary="@string/auto_retry_mode_summary"/>

Dect setting 就是新添加进入的设置菜单，我们的原则尽量不大量修改，所以添加一个PreferenceScreen，新增一个类文件来管理DECt菜单选项。

android:targetPackage="com.android.phone"

android:targetClass="com.android.phone.DectSettings"

我们指明了包名，类名后，因这是个activity，所以我们需要到Phone目录下修改

AndroidManifest.xml文件，指明启动的activity的类名.

Java代码

<activity android:name="CdmaCallOptions"

android:label="@string/cdma_options">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

</intent-filter>

</activity>

<!-- dect activity -->

<activity android:name="DectSettings"

android:label="@string/dect_module_title">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

</intent-filter>

</activity>

<activity android:name="CdmaCallOptions"

android:label="@string/cdma_options">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

</intent-filter>

</activity>

<!-- dect activity -->

<activity android:name="DectSettings"

android:label="@string/dect_module_title">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

</intent-filter>

</activity>

3.修改好后，我们必须在此activity里添加preference布局文件。

在此目录Phone\res\xml下，新增dect_settings.xml

Java代码

<?xml version="1.0" encoding="utf-8"?>

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"

android:title="@string/dect_module_title">

<CheckBoxPreference

android:key="button_dect_module_key"

android:title="@string/dect_module_title"

android:defaultValue="true"

android:summaryOn="@string/dect_module_start"

android:summaryOff="@string/dect_module_stop"

/>

</PreferenceScreen>

<?xml version="1.0" encoding="utf-8"?>

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"

android:title="@string/dect_module_title">

<CheckBoxPreference

android:key="button_dect_module_key"

android:title="@string/dect_module_title"

android:defaultValue="true"

android:summaryOn="@string/dect_module_start"

android:summaryOff="@string/dect_module_stop"

/>

</PreferenceScreen>

好了，总体布局已经完成

4.在\packages\apps\Phone\src\com\android\phone目录下

新增DectSettings.java文件

加载布局文件：

//dect xml

addPreferencesFromResource(R.xml.dect_settings)

里面涉及到的MidPhoneServce服务，是自己添加的，主要通过此服务的AIDL接口跟硬件打交道。想了解系统服务，请网上查找资料。

源码如下：

Java代码

package com.android.phone

import android.content.DialogInterface

import android.os.AsyncResult

import android.os.Bundle

import android.os.Handler

import android.os.Message

import android.preference.CheckBoxPreference

import android.preference.Preference

import android.preference.PreferenceActivity

import android.preference.PreferenceScreen

import android.content.SharedPreferences

import android.content.SharedPreferences.Editor

import android.content.pm.ActivityInfo

import android.content.pm.PackageManager

import android.content.pm.ResolveInfo

import android.os.Bundle

import android.os.Handler

import android.util.Log

import android.content.Context

import com.android.phone.R

import android.os.IMidPhoneService

import android.os.RemoteException

import android.os.ServiceManager

import android.provider.Settings

public class DectSettings extends PreferenceActivity {

private static final String TAG = "DectSettings"

private static final String BUTTON_DECT_KEY = "button_dect_module_key"

private CheckBoxPreference mButtonDect

public IMidPhoneService midphoneservice = null

@Override

protected void onCreate(Bundle icicle) {

super.onCreate(icicle)

//dect xml

addPreferencesFromResource(R.xml.dect_settings)

mButtonDect = (CheckBoxPreference)findPreference(BUTTON_DECT_KEY)

mButtonDect.setPersistent(false)

if(mButtonDect != null) {

int dect_state = Settings.System.getInt(

getContentResolver(),Settings.System.DECT_SAVED_STATE, 1)

mButtonDect.setChecked( dect_state!= 0)

Settings.System.putInt(getContentResolver(),

Settings.System.DECT_SAVED_STATE,dect_state)

Log.e(TAG,"settings:------------->" + dect_state)

}

}

@Override

public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {

if (preference == mButtonDect ) {

int dect = mButtonDect.isChecked() ? 1 : 0

boolean state

if(dect == 1)

state = true

else

state = false

try{

midphoneservice = IMidPhoneService.Stub.asInterface(ServiceManager.getService("midphone"))

Settings.System.putInt(getContentResolver(),

Settings.System.DECT_SAVED_STATE,dect)

midphoneservice.setDectEnabled(state)

Log.e(TAG,"settings:------------->" + dect)

} catch (RemoteException e) {

e.printStackTrace()

}

return true

}

return false

}

@Override

protected void onResume() {

super.onResume()

if (mButtonDect != null) {

mButtonDect.setChecked(Settings.System.getInt(

getContentResolver(),

你在代码里，在Settings上按右键，转到定义，会进入Settings的类代码定义，你给Settings这个类，添加你需要的属性，比如：public string xxx

那么你就可以用 Properties.Settings.Default.xxx

你在这个类里可以无限定义若干个属性

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