android 6.0锁屏界面时间位置修改[通俗易懂]

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在SystemUI里的Android.mk中

LOCAL_STATIC_JAVA_LIBRARIES := Keyguard

LOCAL_STATIC_JAVA_LIBRARIES += com.mediatek.systemui.ext

LOCAL_JAVA_LIBRARIES := telephony-common

LOCAL_JAVA_LIBRARIES += mediatek-framework

LOCAL_JAVA_LIBRARIES += ims-common

LOCAL_PACKAGE_NAME := SystemUI
LOCAL_CERTIFICATE := platform

LOCAL_PRIVILEGED_MODULE := true
LOCAL_PROGUARD_FLAG_FILES := proguard.flags
LOCAL_RESOURCE_DIR := \

frameworks/base/packages/Keyguard/res \

frameworks/base/packages/Keyguard/res_ext \

$(LOCAL_PATH)/res \

$(LOCAL_PATH)/res_ext

发现其中的资源文件来自Keyguard。那么我们要在Keyguard里做修改，编译SystemUI。

1.frameworks/base/packages/Keyguard/res/layout/keyguard_status_view.xml这是锁屏上的时钟界面

<pre name="code" class="java"><?xml version="1.0" encoding="utf-8"?>
<!--
**
** Copyright 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.
*/
-->

<!-- This is a view that shows general status information in Keyguard. -->
<com.android.keyguard.KeyguardStatusView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:androidprv="http://schemas.android.com/apk/res-auto"
    android:id="@+id/keyguard_status_view"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"	
    androidprv:layout_maxWidth="@dimen/keyguard_security_width"
    androidprv:layout_maxHeight="@dimen/keyguard_security_height"
    android:gravity="center_horizontal|top">

    <LinearLayout
        android:id="@+id/keyguard_clock_container"		
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal|top"
        android:orientation="vertical" >
        <TextClock
            android:id="@+id/clock_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:textColor="@color/clock_white"
            android:singleLine="true"
            style="@style/widget_big_thin"
            android:format12Hour="@string/keyguard_widget_12_hours_format"
            android:format24Hour="@string/keyguard_widget_24_hours_format"
            android:layout_marginBottom="@dimen/bottom_text_spacing_digital" />

        <include 
		layout="@layout/keyguard_status_area" />
        <TextView
            android:id="@+id/owner_info"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/date_owner_info_margin"
            android:layout_gravity="center_horizontal"
            android:textColor="@color/clock_gray"
            android:textSize="@dimen/widget_label_font_size"
            android:letterSpacing="0.05"
            android:ellipsize="marquee"
            android:singleLine="true" />

    </LinearLayout>

    <!-- MTK Clock. -->
    <LinearLayout
        android:id="@+id/mtk_keyguard_clock_container"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="left|top"
        android:orientation="vertical" >
        <LinearLayout android:id="@+id/clock_container"
                android:layout_width="match_parent" 
                android:layout_height="wrap_content"
                android:orientation="horizontal" 
				android:background="#ff3030"
                android:layout_gravity="left"
                style="@style/widget_big_thin"
                android:layout_marginBottom="@dimen/bottom_text_spacing_digital">
                <com.mediatek.keyguard.Clock.ClockView
                    android:id="@+id/clock_view" 
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content" 
                    android:layout_gravity="left">

                    <TextView android:id="@+id/clock_text"
                        android:layout_width="wrap_content" 
                        android:layout_height="wrap_content"
                        android:singleLine="true" 
                        android:ellipsize="none"
                        android:textSize="@dimen/kg_status_clock_font_size"
                        android:textAppearance="?android:attr/textAppearanceMedium"
                        android:textColor="#ffffff" 
                        android:drawablePadding="2dip"
                        android:layout_centerInParent="false" />

                    <TextView android:id="@+id/am_pm" 
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content" 
                        android:layout_toEndOf="@id/clock_text"
                        android:layout_alignBaseline="@id/clock_text" 
                        android:singleLine="true"
                        android:ellipsize="none" 
                        android:textSize="14sp"
                        android:layout_marginStart="8dip" />

                </com.mediatek.keyguard.Clock.ClockView>
        </LinearLayout>

        <LinearLayout android:id = "@+id/keyguard_status_area_id"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="16dp">
            <include layout="@layout/keyguard_status_area" />
        </LinearLayout>
        <TextView
            android:id="@+id/owner_info"
            android:layout_marginStart="16dp"
            android:layout_marginEnd="16dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/date_owner_info_margin"
            android:layout_gravity="center_horizontal"
            android:textColor="@color/clock_gray"
            android:textSize="@dimen/widget_label_font_size"
            android:letterSpacing="0.05"
            android:ellipsize="marquee"
            android:singleLine="true" />

    </LinearLayout>
</com.android.keyguard.KeyguardStatusView>

2.
keyguard_status_area.xml日期

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:androidprv="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:gravity="left">
    <TextClock android:id="@+id/date_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="@color/clock_white"
        style="@style/widget_label"
        android:textAllCaps="true"
        android:letterSpacing="0.15"
        android:gravity="left"
        />
    <TextView android:id="@+id/alarm_status"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:drawablePadding="6dp"
        android:drawableStart="@drawable/ic_access_alarms_big"
        android:textColor="@color/clock_gray"
        android:letterSpacing="0.15"
        android:textAllCaps="true"
        style="@style/widget_label"
        android:layout_marginStart="6dp"
        android:gravity="center"
        android:visibility="gone"
        />
</LinearLayout>

第一个xml文件主要修改的是layout_gravity属性；第二个xml文件修改的是android:gravity的属性

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