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C++形参与实参的区别(实例解析) - C/C++ - 清泛网 - 专注C/C++及内核技术

...数定义中,在整个函数体内都可以使用, 离开该函数则不能使用。实参出现在主调函数中,进入被调函数后,实参变量也不能使用。 形参和实参的功能是作数据传送。发生函数调用时, 主调函数把实参的值传送给被调函数的形...
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Remove/hide a preference from the screen

...rences.xml <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools"> <CheckBoxPreference android:defaultValue="false" android:key="show.naviga...
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Add new item count to icon on button - Android

...ble/badge_circle.xml: <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval"> <solid android:color="#F00" /> <stroke android:width="2dip" android:color="#FFF" /> <padding android:left="5dip" android:right="5dip" an...
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What does LayoutInflater in Android do?

...utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/activity_main_layout" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="16dp"> <!-- Her...
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How can you make a custom keyboard in Android?

...oding="utf-8"?> <Keyboard xmlns:android="http://schemas.android.com/apk/res/android" android:keyWidth="15%p" android:keyHeight="15%p" > <Row> <Key android:codes="1" android:keyLabel="1" android:horizontalGap="4%p"/> <Key android:codes="2" a...
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Handling a Menu Item Click Event - Android

...res/menu/menu_main.xml <menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity"> <item android:id="@+id/settings" android...
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How to prevent a scrollview from scrolling to a webview after data is loaded?

...t, using: <MyScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@color/background" > That works for me. The ScrollView will not auto scroll to the WebView anymore. ...
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Java内存泄露原因详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...不再需要,但是因为长生命周期对象持有它的引用而导致不能被回收,这就是java中内存泄露的发生场景。具体主要有如下几大类: 1、静态集合类引起内存泄露: 像HashMap、Vector等的使用最容易出现内存泄露,这些静态变量的...
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C++ 打开文件,以清空覆盖的方式 - C/C++ - 清泛网 - 专注C/C++及内核技术

C++ 打开文件,以清空覆盖的方式cpp_fstream_trunc_out_inC++ 打开文件,以清空覆盖的方式,代码如下:std::unique_ptr<ostream> stream = std::make_unique<fstream>("xxx", ios::trunc | ios::out | ios::in);*stream << "co C++ 打开文件,以清空覆盖的方式,代码如...
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How to check programmatically if an application is installed or not in Android?

... @Aerrow.. Suppose i am checking my .apk is installed or nor ? at time of installation... I am getting same exception while checking my package com.test.installedornot.My .apk size is more than 9MB then in that case how i will manage this exception? ...