Android-ScaleLayout

A Simple & Convenience MultiScreen-Support-Library for Android

The essence is percent scaling.

different from android-percent-support-lib

1. More reliable
   android-percent-support-lib The percentage of the parent and child views.
   Android-ScaleLayout The percentage of the design and devices screens.

2. More convenience
   android-percent-support-lib need to calculate percent.
   Android-ScaleLayout directly write the design size on layout.xml.

How to look?

Principle

float realPixel = percent * designPixel

Pix Mode

float realPixel = percent * designPixel  float percent = mScreenWidth / designScreenWidth  float designPixel = res.getDimensionPixelSize()

float realPixel = mScreenWidth * res.getDimensionPixelSize() / designScreenWidth

DP Mode

float realPixel = percent * designPixel  float percent = mScreenWidth / designScreenWidth float designPixel = designDP * designDensity // dp to pixel  float designDP = res.getDimensionPixelSize() / mDensity

float realPixel = (mScreenWidth * designDensity * getPixelSize()) / (designScreenWidth * mDensity)

Usage

0. dependencies

dependencies {

  compile 'cn.gavinliu.android.lib:ScaleLayout:1.0.4' 
}
 

1. Initialize

public class MyApplication extends Application {

@Override
  public void onCreate() {

ScaleConfig.create(this,

 1080, // Design Width

 1920, // Design Height

 3,
 // Design Density

 3,
 // Design FontScale

 ScaleConfig.DIMENS_UNIT_DP);

  
}
 
}

TypedValue.COMPLEX_UNIT_SP is Android FontSize unit, the fontscale: float fontScale = ctx.getResources().getDisplayMetrics().scaledDensity;

2. Scale***Layout

Only need to replace FrameLayout LinearLayout RelativeLayout to ScaleFrameLayout ScaleLinearLayout ScaleRelativeLayout.

3. Scale by width or height

Width is default, you can also changed using attr.

<attr name="layout_scale_by" format="enum">
  <enum name="width" value="0"/>
  <enum name="height" value="1"/> </attr>

app:layout_scale_by="width"

Support Attrs

<attr name="android:layout_width"/> <attr name="android:layout_height"/>  <attr name="android:layout_margin"/> <attr name="android:layout_marginLeft"/> <attr name="android:layout_marginTop"/> <attr name="android:layout_marginRight"/> <attr name="android:layout_marginBottom"/> <attr name="android:layout_marginStart"/> <attr name="android:layout_marginEnd"/>  <attr name="android:padding"/> <attr name="android:paddingLeft"/> <attr name="android:paddingTop"/> <attr name="android:paddingRight"/> <attr name="android:paddingBottom"/> <attr name="android:paddingStart"/> <attr name="android:paddingEnd"/>  <!-- TextView --> <attr name="android:textSize"/>

License

MIT