Android-Activity Home/Up箭头在SDK 24中具有附加的填充/边距 [英] Android - Activity Home/Up arrow has additional padding/margin with SDK 24

问题描述

我刚刚将我的应用程序从使用SDK 23更新到了SDK 24.

I've just updated my app from using SDK 23 to SDK 24.

我的活动显示了向上/主页箭头(即getSupportActionBar().setDisplayHomeAsUpEnabled(true))时出现了问题，因为在向上箭头和活动标题之间现在有多余的(不需要的)空间.

A problem has arisen for my activities that have show the Up/Home arrow (i.e., getSupportActionBar().setDisplayHomeAsUpEnabled(true)) in that there is now additional (unwanted) space between the Up arrow and the activity title.

对于没有上箭头的活动，活动标题与以前完全相同，这表明附加的填充/边距与上箭头而不是活动标题相关.

For activities that don't have an Up arrow, the activity title is in exactly the same place as before, which suggests the additional padding/margin is associated with the Up arrow rather than with the activity title.

我的问题是如何更改布局，以使其在SDK 24中看起来与在SDK 23中一样?

My question is how do I change the layout so that it looks the same with SDK 24 as it did with SDK 23?

使用SDK 23时，向上箭头和标题之间的距离很小:

使用SDK 24时，向上箭头和标题之间的间隙很大(不需要):

这是我的旧build.gradle(SDK 23):

Here is my old build.gradle (SDK 23):

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "com.example.myapp"
        minSdkVersion 19
        targetSdkVersion 23
        versionCode 42
        versionName "0.42"
    }
    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.google.android.gms:play-services-vision:9.0.2'
    compile 'ch.acra:acra:4.7.0'
    compile 'com.android.support:support-v4:23.4.0'
    compile 'com.android.support:recyclerview-v7:23.4.0'
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.android.support:design:23.4.0'
    compile 'com.android.support:support-v13:23.4.0'
    compile 'com.journeyapps:zxing-android-embedded:3.2.0@aar'
    compile 'com.google.zxing:core:3.2.1'
}

这是新的build.gradle(SDK 24):

Here is the new build.gradle (SDK 24):

apply plugin: 'com.android.application'

android {
    compileSdkVersion 24
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "com.example.myapp"
        minSdkVersion 19
        targetSdkVersion 24
        versionCode 42
        versionName "0.42"
    }
    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.google.android.gms:play-services-vision:9.0.2'
    compile 'ch.acra:acra:4.7.0'
    compile 'com.android.support:support-v4:24.0.0'
    compile 'com.android.support:recyclerview-v7:24.0.0'
    compile 'com.android.support:appcompat-v7:24.0.0'
    compile 'com.android.support:design:24.0.0'
    compile 'com.android.support:support-v13:24.0.0'
    compile 'com.journeyapps:zxing-android-embedded:3.2.0@aar'
    compile 'com.google.zxing:core:3.2.1'
}

推荐答案

我认为此填充是与SDK 24中的Material规范相匹配的新标准. 首先，您必须通过以下代码隐藏默认的工具栏标题:

I think that this padding is a new standard to match Material spec in SDK 24. First you must hide default toolbar title by this code:

getSupportActionBar().setDisplayShowTitleEnabled(false);

getSupportActionBar().setDisplayShowTitleEnabled(false);

然后创建一个名为toolbar.xml的文件，并将以下代码添加到该文件中:

Then make a file called toolbar.xml and add these codes in that file:

<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="56dp"
    android:background="@color/primary_color"
    app:theme="@style/ThemeOverlay.AppCompat"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
    app:contentInsetStartWithNavigation="0dp">

    <TextView
        android:id="@+id/toolbar_title"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginLeft="16dp" <!-- Add margin -->
        android:layout_marginStart="16dp"
        android:gravity="left|center"
        android:text="Toolbar Title" <!-- Your title text -->
        android:textColor="@color/white" <!-- Matches default title styles -->
        android:textSize="20sp"
        android:fontFamily="sans-serif-medium"/>

</android.support.v7.widget.Toolbar>

如您所见，您可以控制此文件中的所有内容.看一下toolbar.xml中的这一行:

As you see, you can control everything in this file. Look at this line in toolbar.xml :

app:contentInsetStartWithNavigation ="0dp"

app:contentInsetStartWithNavigation="0dp"

这就是您想要的.祝你好运.

This is what you want. Goodluck.

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