Android px轉dip px轉sp法則

標籤：android   移動開發   px轉dp   px轉dip   px轉sp   

在一些情況下，美工往往給我的都是px 這個時候我們就需要根據螢幕解析度把px轉成dip或者sp 下面就是計算公式：

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity"     android:background="@android:color/white">            <Button         android:id="@+id/button"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:padding="20dp"        android:text="開始"/>   </FrameLayout>

package com.example.test5;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.util.DisplayMetrics;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.Toast;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.main);findViewById(R.id.button).setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Test();}});}public boolean isGreaterThan(String time){String time1=time.replace(":", "").trim();String time2="0130";return Integer.parseInt(time2)-Integer.parseInt(time1)<=0;}private void Test() {final float fontScale = this.getResources().getDisplayMetrics().scaledDensity;  final float scale = this.getResources().getDisplayMetrics().density;int screenWidth  = getWindowManager().getDefaultDisplay().getWidth();    int screenHeight = getWindowManager().getDefaultDisplay().getHeight();    DisplayMetrics dm = new DisplayMetrics();      dm = new DisplayMetrics();      getWindowManager().getDefaultDisplay().getMetrics(dm);      float density  = dm.density;         float densityDPI = dm.densityDpi;  Log.d("text", "scale="+scale+"fontScale="+fontScale+"screenWidth="+screenWidth+"screenHeight="+screenHeight);Log.d("text", "density="+density+"densityDPI="+densityDPI); int a=px2sp(26,scale); String s1=px2dip(this,13)+"";String s6=px2dip(this,60)+"";String s7=px2dip(this,11)+"";String s8=px2dip(this,162)+"";String s9=px2dip(this,232)+"";String s10=px2dip(this,44)+"";String s11=px2dip(this,178)+"";String s12=px2dip(this,610)+"";String s13=px2dip(this,420)+"";String s14=px2dip(this,126)+"";String s2=px2dip(this,32)+"";String s3=px2sp(26, fontScale)+"";String s4=px2sp(22, fontScale)+"";String s5=px2sp(18, fontScale)+"";System.out.println("s1: "+s1+"-----"+"s6:"+s6+"-----"+"s7:"+s7+"-----"+"s8:"+s8+"-----"+"s9:"+s9+"-----"+"s10:"+s10+"-----"+"s11:"+s11+"-----"+"s12:"+s12+"-----"+"s13:"+s13+"-----"+"s14:"+s14+"-----"+"s2:"+s2+"-----"+"s3"+s3+"-----"+"s4"+s4+"-----"+"s5"+s5+"-----");}public static int dip2px(Context context, float dpValue) {final float scale = context.getResources().getDisplayMetrics().density;return (int) (dpValue * scale + 0.5f);}        public static int px2dip(Context context, float pxValue) {final float scale = context.getResources().getDisplayMetrics().density;return (int) (pxValue / scale + 0.5f);}        public static int px2sp(float pxValue, float fontScale) {return (int) (pxValue / fontScale + 0.5f);}        public static int sp2px(float spValue, float fontScale) {return (int) (spValue * fontScale + 0.5f);}        public void sT(String s){    Toast.makeText(this, s, Toast.LENGTH_SHORT).show();    }}

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Android px轉dip px轉sp法則