如何使用百分比进行android布局? [英] How to use Percentage for android layout?

问题描述

我们如何为 android 视图元素使用 百分比 值?像这样

How can we use percentage values for android view elements? something like this

<TextView
        android:id="@+id/"
        android:layout_width="75%"
        android:layout_height="50%"/>

推荐答案

2018 年更新:

PercentRelativeLayout 和 PercentFrameLayout 已弃用.考虑使用 ConstraintLayout

PercentRelativeLayout and PercentFrameLayout are deprecated. Consider using ConstraintLayout

旧答案:

到目前为止，Android 支持库限制了在哪里使用它:

So far Android Support library has limited on where to use this:

1. 使用 RelativeLayout

android.support.percent.PercentRelativeLayout

与 FrameLayout

android.support.percent.PercentFrameLayout

如何使用?

好吧，首先确保在build.grade(Module: app) 在你的安卓应用中.

Well, first make sure to include the dependency at build.grade(Module: app) in your android app.

dependencies {
    compile 'com.android.support:percent:23.3.0'
}

然后导航到本示例中的 xml 布局 (.MainActivity)

Then navigate to your xml layout in this example (.MainActivity)

<android.support.percent.PercentRelativeLayout

  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"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context=".MainActivity">


  <Button
    android:id="@+id/button"
    android:text="Button"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    app:layout_widthPercent="30%"/>

  <Button    
    android:id="@+id/button2"
    android:text="Button 2"
    android:layout_height="wrap_content"
    android:layout_toRightOf="@id/button"
    app:layout_widthPercent="60%"/>

  <Button
    android:id="@+id/button3"
    android:text="Button 3"
    android:layout_height="wrap_content"
    android:layout_below="@+id/button"
    android:layout_alignParentStart="true"
    android:layout_alignParentLeft="true"
    app:layout_widthPercent="90%"/>

</android.support.percent.PercentRelativeLayout>

有关详细信息，请查看此处:

For more detail please check here:

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