Andbase框架中有個AbViewUtil，經測試，確實可以實現屏幕適配。
下面是該文件源碼：
這裏寫代碼片/*
* Copyright (C) 2012 www.amsoft.cn
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/package com.keqiang.borche.widget.andbase.utils;import android.annotation.SuppressLint;import android.app.Activity;import android.content.Context;import android.graphics.Paint;import android.os.Build.VERSION;import android.text.TextPaint;import android.util.DisplayMetrics;import android.util.TypedValue;import android.view.View;import android.view.View.MeasureSpec;import android.view.ViewGroup;import android.view.ViewGroup.MarginLayoutParams;import android.view.ViewParent;import android.widget.AbsListView;import android.widget.GridView;import android.widget.ListAdapter;import android.widget.ListView;import android.widget.TextView;import com.keqiang.borche.widget.andbase.view.AbListViewFooter;import com.keqiang.borche.widget.andbase.view.AbListViewHeader;// TODO: Auto-generated Javadoc/**
* 2012 amsoft.cn
* 名稱：AbViewUtil.java
* 描述：View工具類.
*
* @author 還如一夢中
* @version v1.0
* @date：2013-01-17 下午11:52:13
*/public class AbViewUtil {
/**
* 無效值
*/
public static final int INVALID = Integer.MIN_VALUE; /**
* 描述：重置AbsListView的高度. item 的最外層佈局要用
* RelativeLayout,如果計算的不準，就爲RelativeLayout指定一個高度
*
* @param absListView
* the abs list view
* @param lineNumber
* 每行幾個 ListView一行一個item
* @param verticalSpace
* the vertical space
*/
public static void setAbsListViewHeight(AbsListView absListView, int lineNumber, int verticalSpace) { int totalHeight = getAbsListViewHeight(absListView, lineNumber,
verticalSpace);
ViewGroup.LayoutParams params = absListView.getLayoutParams();
params.height = totalHeight;
((MarginLayoutParams) params).setMargins(0, 0, 0, 0);
absListView.setLayoutParams(params);
} /**
* 描述：獲取AbsListView的高度.
*
* @param absListView the abs list view
* @param lineNumber 每行幾個 ListView一行一個item
* @param verticalSpace the vertical space
* @return the abs list view height
*/
public static int getAbsListViewHeight(AbsListView absListView, int lineNumber, int verticalSpace) { int totalHeight = 0; int w = MeasureSpec.makeMeasureSpec(0,
MeasureSpec.UNSPECIFIED); int h = MeasureSpec.makeMeasureSpec(0,
MeasureSpec.UNSPECIFIED);
absListView.measure(w, h);
ListAdapter mListAdapter = absListView.getAdapter(); if (mListAdapter == null) { return totalHeight;
} int count = mListAdapter.getCount(); if (absListView instanceof ListView) { for (int i = 0; i < count; i++) {
View listItem = mListAdapter.getView(i, null, absListView);
listItem.measure(w, h);
totalHeight += listItem.getMeasuredHeight();
} if (count == 0) {
totalHeight = verticalSpace;
} else {
totalHeight = totalHeight
+ (((ListView) absListView).getDividerHeight() * (count - 1));
}
} else if (absListView instanceof GridView) { int remain = count % lineNumber; if (remain > 0) {
remain = 1;
} if (mListAdapter.getCount() == 0) {
totalHeight = verticalSpace;
} else {
View listItem = mListAdapter.getView(0, null, absListView);
listItem.measure(w, h); int line = count / lineNumber + remain;
totalHeight = line * listItem.getMeasuredHeight() + (line - 1)
* verticalSpace;
}
} return totalHeight;
} /**
* 測量這個view
* 最後通過getMeasuredWidth()獲取寬度和高度.
* @param view 要測量的view
* @return 測量過的view
*/
public static void measureView(View view) {
ViewGroup.LayoutParams p = view.getLayoutParams(); if (p == null) {
p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
} int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width); int lpHeight = p.height; int childHeightSpec; if (lpHeight > 0) {
childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight,
MeasureSpec.EXACTLY);
} else {
childHeightSpec = MeasureSpec.makeMeasureSpec(0,
MeasureSpec.UNSPECIFIED);
}
view.measure(childWidthSpec, childHeightSpec);
} /**
* 獲得這個View的寬度
* 測量這個view，最後通過getMeasuredWidth()獲取寬度.
* @param view 要測量的view
* @return 測量過的view的寬度
*/
public static int getViewWidth(View view) {
measureView(view); return view.getMeasuredWidth();
} /**
* 獲得這個View的高度
* 測量這個view，最後通過getMeasuredHeight()獲取高度.
* @param view 要測量的view
* @return 測量過的view的高度
*/
public static int getViewHeight(View view) {
measureView(view); return view.getMeasuredHeight();
} /**
* 從父親佈局中移除自己
* @param v
*/
public static void removeSelfFromParent(View v) {
ViewParent parent = v.getParent(); if(parent != null){ if(parent instanceof ViewGroup){
((ViewGroup)parent).removeView(v);
}
}
} /**
* 描述：dip轉換爲px.
*
* @param context the context
* @param dipValue the dip value
* @return px值
*/
public static float dip2px(Context context, float dipValue) {
DisplayMetrics mDisplayMetrics = AbAppUtil.getDisplayMetrics(context); return applyDimension(TypedValue.COMPLEX_UNIT_DIP,dipValue,mDisplayMetrics);
} /**
* 描述：px轉換爲dip.
*
* @param context the context
* @param pxValue the px value
* @return dip值
*/
public static float px2dip(Context context, float pxValue) {
DisplayMetrics mDisplayMetrics = AbAppUtil.getDisplayMetrics(context); return pxValue / mDisplayMetrics.density;
} /**
* 描述：sp轉換爲px.
*
* @param context the context
* @param spValue the sp value
* @return sp值
*/
public static float sp2px(Context context, float spValue) {
DisplayMetrics mDisplayMetrics = AbAppUtil.getDisplayMetrics(context); return applyDimension(TypedValue.COMPLEX_UNIT_SP,spValue,mDisplayMetrics);
} /**
* 描述：px轉換爲sp.
*
* @param context the context
* @param pxValue the sp value
* @return sp值
*/
public static float px2sp(Context context, float pxValue) {
DisplayMetrics mDisplayMetrics = AbAppUtil.getDisplayMetrics(context); return pxValue / mDisplayMetrics.scaledDensity;
} /**
* 描述：根據屏幕大小縮放.
*
* @param context the context
* @param value the px value
* @return the int
*/
public static int scaleValue(Context context, float value) {
DisplayMetrics mDisplayMetrics = AbAppUtil.getDisplayMetrics(context); //爲了兼容尺寸小密度大的情況
int width = mDisplayMetrics.widthPixels; int height = mDisplayMetrics.heightPixels; //解決橫屏比例問題
if(width > height){
width = mDisplayMetrics.heightPixels;
height = mDisplayMetrics.widthPixels;
} if(mDisplayMetrics.scaledDensity >= AbAppConfig.UI_DENSITY){ //密度
if(width > AbAppConfig.UI_WIDTH){
value = value*(1.3f - 1.0f/mDisplayMetrics.scaledDensity);
}else if(width < AbAppConfig.UI_WIDTH){
value = value*(1.0f - 1.0f/mDisplayMetrics.scaledDensity);
}
}else{ //密度小屏幕大:縮小比例
float offset = AbAppConfig.UI_DENSITY-mDisplayMetrics.scaledDensity; if(offset > 0.5f){
value = value * 0.9f;
}else{
value = value * 0.95f;
}
} return scale(mDisplayMetrics.widthPixels,mDisplayMetrics.heightPixels, value);
} /**
* 描述：根據屏幕大小縮放文本.
*
* @param context the context
* @param value the px value
* @return the int
*/
public static int scaleTextValue(Context context, float value) { return scaleValue(context, value);
} /**
* 描述：根據屏幕大小縮放.
*
* @param displayWidth the display width
* @param displayHeight the display height
* @param pxValue the px value
* @return the int
*/
public static int scale(int displayWidth, int displayHeight, float pxValue) { if(pxValue == 0 ){ return 0;
} float scale = 1; try { int width = displayWidth; int height = displayHeight; //解決橫屏比例問題
if(width > height){
width = displayHeight;
height = displayWidth;
} float scaleWidth = (float) width / AbAppConfig.UI_WIDTH; float scaleHeight = (float) height / AbAppConfig.UI_HEIGHT;
scale = Math.min(scaleWidth, scaleHeight);
} catch (Exception e) {
} return Math.round(pxValue * scale + 0.5f);
} /**
* TypedValue官方源碼中的算法，任意單位轉換爲PX單位
* @param unit TypedValue.COMPLEX_UNIT_DIP
* @param value 對應單位的值
* @param metrics 密度
* @return px值
*/
public static float applyDimension(int unit, float value,
DisplayMetrics metrics){ switch (unit) { case TypedValue.COMPLEX_UNIT_PX: return value; case TypedValue.COMPLEX_UNIT_DIP: return value * metrics.density; case TypedValue.COMPLEX_UNIT_SP: return value * metrics.scaledDensity; case TypedValue.COMPLEX_UNIT_PT: return value * metrics.xdpi * (1.0f/72); case TypedValue.COMPLEX_UNIT_IN: return value * metrics.xdpi; case TypedValue.COMPLEX_UNIT_MM: return value * metrics.xdpi * (1.0f/25.4f);
} return 0;
} /**
*
* 描述：View樹遞歸調用做適配.
* AbAppConfig.uiWidth = 1080;
* AbAppConfig.uiHeight = 700;
* scaleContentView((RelativeLayout)findViewById(R.id.rootLayout));
* 要求佈局中的單位都用px並且和美工的設計圖尺寸一致，包括所有寬高，Padding,Margin,文字大小
* @param contentView
*/
public static void scaleContentView(ViewGroup contentView){
AbViewUtil.scaleView(contentView); if(contentView.getChildCount()>0){ for(int i=0;i<contentView.getChildCount();i++){
View view = contentView.getChildAt(i); if(view instanceof ViewGroup){ if(isNeedScale(view)){
scaleContentView((ViewGroup)(view));
}
}else{
scaleView(contentView.getChildAt(i));
}
}
}
} /**
*
* 描述：View樹遞歸調用做適配.
* AbAppConfig.uiWidth = 1080;
* AbAppConfig.uiHeight = 700;
* scaleContentView(context,R.id.rootLayout);
* 要求佈局中的單位都用px並且和美工的設計圖尺寸一致，包括所有寬高，Padding,Margin,文字大小
* @param parent
* @param id
*/
public static void scaleContentView(View parent,int id){
ViewGroup contentView = null;
View view = parent.findViewById(id); if(view instanceof ViewGroup){
contentView = (ViewGroup)view;
scaleContentView(contentView);
}
} /**
*
* 描述：View樹遞歸調用做適配.
* AbAppConfig.uiWidth = 1080;
* AbAppConfig.uiHeight = 700;
* scaleContentView(context,R.id.rootLayout);
* 要求佈局中的單位都用px並且和美工的設計圖尺寸一致，包括所有寬高，Padding,Margin,文字大小
* @param context
* @param id
*/
public static void scaleContentView(Context context,int id){
ViewGroup contentView = null;
View view = ((Activity)context).findViewById(id); if(view instanceof ViewGroup){
contentView = (ViewGroup)view;
scaleContentView(contentView);
}
} /**
* 按比例縮放View，以佈局中的尺寸爲基準
* @param view
*/
@SuppressLint("NewApi") public static void scaleView(View view){ if(!isNeedScale(view)){ return;
} if (view instanceof TextView){
TextView textView = (TextView) view;
setTextSize(textView,textView.getTextSize());
}
ViewGroup.LayoutParams params = (ViewGroup.LayoutParams) view.getLayoutParams(); if (null != params){ int width = INVALID; int height = INVALID; if (params.width != ViewGroup.LayoutParams.WRAP_CONTENT
&& params.width != ViewGroup.LayoutParams.MATCH_PARENT){
width = params.width;
} if (params.height != ViewGroup.LayoutParams.WRAP_CONTENT
&& params.height != ViewGroup.LayoutParams.MATCH_PARENT){
height = params.height;
} //size
setViewSize(view,width,height); // Padding
setPadding(view,view.getPaddingLeft(),view.getPaddingTop(),view.getPaddingRight(),view.getPaddingBottom());
} // Margin
if(view.getLayoutParams() instanceof MarginLayoutParams){
MarginLayoutParams mMarginLayoutParams = (MarginLayoutParams) view
.getLayoutParams(); if (mMarginLayoutParams != null){
setMargin(view,mMarginLayoutParams.leftMargin,mMarginLayoutParams.topMargin,mMarginLayoutParams.rightMargin,mMarginLayoutParams.bottomMargin);
}
} if(VERSION.SDK_INT>=16){ //最大最小寬高
int minWidth = scaleValue(view.getContext(),view.getMinimumWidth()); int minHeight = scaleValue(view.getContext(),view.getMinimumHeight());
view.setMinimumWidth(minWidth);
view.setMinimumHeight(minHeight);
}
} /**
*
* 描述：是否需要Scale.
* @param view
* @return
*/
public static boolean isNeedScale(View view){ if (view instanceof AbListViewHeader){ return false;
} if (view instanceof AbListViewFooter){ return false;
} return true;
} /**
* 縮放文字大小
* @param textView button
* @param size sp值
* @return
*/
public static void setSPTextSize(TextView textView,float size) { float scaledSize = scaleTextValue(textView.getContext(),size);
textView.setTextSize(scaledSize);
} /**
* 縮放文字大小,這樣設置的好處是文字的大小不和密度有關，
* 能夠使文字大小在不同的屏幕上顯示比例正確
* @param textView button
* @param sizePixels px值
* @return
*/
public static void setTextSize(TextView textView,float sizePixels) { float scaledSize = scaleTextValue(textView.getContext(),sizePixels);
textView.setTextSize(TypedValue.COMPLEX_UNIT_PX,scaledSize);
} /**
* 縮放文字大小
* @param context
* @param textPaint
* @param sizePixels px值
* @return
*/
public static void setTextSize(Context context,TextPaint textPaint,float sizePixels) { float scaledSize = scaleTextValue(context,sizePixels);
textPaint.setTextSize(scaledSize);
} /**
* 縮放文字大小
* @param context
* @param paint
* @param sizePixels px值
* @return
*/
public static void setTextSize(Context context,Paint paint,float sizePixels) { float scaledSize = scaleTextValue(context,sizePixels);
paint.setTextSize(scaledSize);
} /**
* 設置View的PX尺寸
* @param view 如果是代碼new出來的View，需要設置一個適合的LayoutParams
* @param widthPixels
* @param heightPixels
*/
public static void setViewSize(View view,int widthPixels, int heightPixels){ int scaledWidth = scaleValue(view.getContext(), widthPixels); int scaledHeight = scaleValue(view.getContext(), heightPixels);
ViewGroup.LayoutParams params = view.getLayoutParams(); if(params == null){
AbLogUtil.e(AbViewUtil.class, "setViewSize出錯,如果是代碼new出來的View，需要設置一個適合的LayoutParams"); return;
} if (widthPixels != INVALID){
params.width = scaledWidth;
} if (heightPixels != INVALID && heightPixels!=1){
params.height = scaledHeight;
}
view.setLayoutParams(params);
} /**
* 設置PX padding.
*
* @param view the view
* @param left the left padding in pixels
* @param top the top padding in pixels
* @param right the right padding in pixels
* @param bottom the bottom padding in pixels
*/
public static void setPadding(View view, int left, int top, int right, int bottom) { int scaledLeft = scaleValue(view.getContext(), left); int scaledTop = scaleValue(view.getContext(), top); int scaledRight = scaleValue(view.getContext(), right); int scaledBottom = scaleValue(view.getContext(), bottom);
view.setPadding(scaledLeft, scaledTop, scaledRight, scaledBottom);
} /**
* setting PX margin.
*
* @param view the view
* @param left the left margin in pixels
* @param top the top margin in pixels
* @param right the right margin in pixels
* @param bottom the bottom margin in pixels
*/
public static void setMargin(View view, int left, int top, int right, int bottom) { int scaledLeft = scaleValue(view.getContext(), left); int scaledTop = scaleValue(view.getContext(), top); int scaledRight = scaleValue(view.getContext(), right); int scaledBottom = scaleValue(view.getContext(), bottom); if(view.getLayoutParams() instanceof MarginLayoutParams){
MarginLayoutParams mMarginLayoutParams = (MarginLayoutParams) view
.getLayoutParams(); if (mMarginLayoutParams != null){ if (left != INVALID) {
mMarginLayoutParams.leftMargin = scaledLeft;
} if (right != INVALID) {
mMarginLayoutParams.rightMargin = scaledRight;
} if (top != INVALID) {
mMarginLayoutParams.topMargin = scaledTop;
} if (bottom != INVALID) {
mMarginLayoutParams.bottomMargin = scaledBottom;
}
view.setLayoutParams(mMarginLayoutParams);
}
}
}
}下面簡單介紹其用法。
1）首先，自定義一個Application子類。
2）將自定義Application子類添加到Manifest文件中。
<application android:name=".application.MyApplication"
3）在Application子類的onCreate()方法中添加美工尺寸。
//美工效果圖分辨率，用於適配 AbAppConfig.UI_WIDTH = 640; AbAppConfig.UI_HEIGHT = 1136;
4）然後，在佈局文件的最外層容器中添加一個id。
android:id="@+id/act_main_root_layout"
5）如果是Activity，那麼在Activity的onCreate（）方法中添加如下內容。
setContentView(R.layout.activity_forget_pwd); //根據屏幕分辨率和屏幕密度自定縮放 AbViewUtil.scaleContentView((LinearLayout) findViewById(R.id.act_main_root_layout));
如果是Fragment，那麼在Fragment的onCreateView（）方法中添加如下內容。
inflater = LayoutInflater.from(getActivity()); rootView = inflater.inflate(R.layout.fragment_function, container, false); AbViewUtil.scaleContentView((LinearLayout) rootView.findViewById(R.id.fgm_main_root_layout));
6）注意，佈局文件中的寬高和文字大小都統一使用美工提供的分辨率的值，單位統一使用px，至此。一個Activity的屏幕適配就完成了。