利用代码实现Android多分辨率的对应——即一套图片对应多个分辨率

main.xml如下:

<RelativeLayout 
    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"
   >

    <TextView
        android:id="@+id/titleTextView"
        android:layout_width="150px"
        android:layout_height="50px"
        android:text="@string/hello_world"
        android:gravity="center"
        android:background="@android:color/black"
        android:textColor="@android:color/white"
        android:layout_centerHorizontal="true"
     />
    
    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="fill_parent"
        android:layout_height="200px"
        android:layout_marginTop="80px"
        android:orientation="horizontal" >
        <Button
            android:id="@+id/firstButton"
            android:layout_width="150px"
            android:layout_height="100px"
            android:layout_marginLeft="50px"
            android:layout_marginTop="40px"
            android:orientation="horizontal"
            android:text="Button1" />

        <Button
            android:id="@+id/secondButton"
            android:layout_width="150px"
            android:layout_height="100px"
            android:layout_marginLeft="100px"
            android:layout_marginTop="40px"
            android:orientation="horizontal"
            android:text="Button2" />
    </LinearLayout>
    
    <RelativeLayout
        android:id="@+id/relativeLayout"
        android:layout_width="fill_parent"
        android:layout_height="300px"
        android:layout_marginTop="280px" >

        <ImageView
            android:id="@+id/firstImageView"
            android:layout_width="150px"
            android:layout_height="200px"
            android:layout_alignParentLeft="true"
            android:src="@drawable/icon" />
        
         <ImageView
            android:id="@+id/secondImageView"
             android:layout_width="150px"
            android:layout_height="200px"
            android:layout_alignParentRight="true"
            android:src="@drawable/icon" />
    </RelativeLayout>

</RelativeLayout>

ViewScaleUtil如下:

package cn.utils;
import android.app.Activity;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.View;
import android.widget.TextView;

public class ViewScaleUtil {
	public static float sScale = 1.0f;
	
	public static final int BASE_SCREEN_WIDTH = 480;
	public static final int BASE_SCREEN_HEIGHT = 854;

	public static final int LAYOUT_PARAMS_TYPE_LINEAR_LAYOUT = 0;
	public static final int LAYOUT_PARAMS_TYPE_RELATIVE_LAYOUT = 1;
	public static final int LAYOUT_PARAMS_TYPE_FRAME_LAYOUT = 2;

	public static final int LAYOUT_PARAMS_WIDTH = 0;
	public static final int LAYOUT_PARAMS_HEIGHT = 1;
	public static final int LAYOUT_PARAMS_TOP_MARGIN = 2;
	public static final int LAYOUT_PARAMS_LEFT_MARGIN = 3;
	public static final int LAYOUT_PARAMS_BOTTOM_MARGIN = 4;
	public static final int LAYOUT_PARAMS_RIGHT_MARGIN = 5;
	public static final int LAYOUT_PARAMS_COUNT = 6;
	
	public static void setScale(Activity context) {
		int width, height;
		DisplayMetrics displayMetrics = new DisplayMetrics();
		context.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
		height = displayMetrics.heightPixels;
		width = displayMetrics.widthPixels;
		sScale = (float) width / BASE_SCREEN_WIDTH;
		System.out.println("---> sScale="+sScale);
	}
	
	
	public static int[] scaleProcess(View view, int paramType) {
		if (view == null || sScale == 1.0f){
			return null;
			}
		int[] orgLayoutParams = new int[LAYOUT_PARAMS_COUNT];
		switch (paramType) {
		case LAYOUT_PARAMS_TYPE_LINEAR_LAYOUT:
			android.widget.LinearLayout.LayoutParams llp
			= (android.widget.LinearLayout.LayoutParams) view.getLayoutParams();
			
			orgLayoutParams[LAYOUT_PARAMS_WIDTH] = llp.width;
			orgLayoutParams[LAYOUT_PARAMS_HEIGHT] = llp.height;
			orgLayoutParams[LAYOUT_PARAMS_TOP_MARGIN] = llp.topMargin;
			orgLayoutParams[LAYOUT_PARAMS_LEFT_MARGIN] = llp.leftMargin;
			orgLayoutParams[LAYOUT_PARAMS_BOTTOM_MARGIN] = llp.bottomMargin;
			orgLayoutParams[LAYOUT_PARAMS_RIGHT_MARGIN] = llp.rightMargin;
			// Size
			if (llp.width > 0){
				llp.width = (int) Math.ceil(llp.width * sScale);
				}
			if (llp.height > 0){
				llp.height = (int) Math.ceil(llp.height * sScale);
				}
			// Margin
			llp.topMargin = (int) Math.ceil(llp.topMargin * sScale);
			llp.leftMargin = (int) Math.ceil(llp.leftMargin * sScale);
			llp.bottomMargin = (int) Math.ceil(llp.bottomMargin * sScale);
			llp.rightMargin = (int) Math.ceil(llp.rightMargin * sScale);
			view.setLayoutParams(llp);
			break;
		case LAYOUT_PARAMS_TYPE_RELATIVE_LAYOUT:
			android.widget.RelativeLayout.LayoutParams 
			rlp = (android.widget.RelativeLayout.LayoutParams) view.getLayoutParams();
			
			orgLayoutParams[LAYOUT_PARAMS_HEIGHT] = rlp.height;
			orgLayoutParams[LAYOUT_PARAMS_TOP_MARGIN] = rlp.topMargin;
			orgLayoutParams[LAYOUT_PARAMS_LEFT_MARGIN] = rlp.leftMargin;
			orgLayoutParams[LAYOUT_PARAMS_BOTTOM_MARGIN] = rlp.bottomMargin;
			orgLayoutParams[LAYOUT_PARAMS_RIGHT_MARGIN] = rlp.rightMargin;
			// Size
			if (rlp.width > 0){
				rlp.width = (int) Math.ceil(rlp.width * sScale);
				}
			if (rlp.height > 0){
				rlp.height = (int) Math.ceil(rlp.height * sScale);
				}
			// Margin
			rlp.topMargin = (int) Math.ceil(rlp.topMargin * sScale);
			rlp.leftMargin = (int) Math.ceil(rlp.leftMargin * sScale);
			rlp.bottomMargin = (int) Math.ceil(rlp.bottomMargin * sScale);
			rlp.rightMargin = (int) Math.ceil(rlp.rightMargin * sScale);
			view.setLayoutParams(rlp);
			break;
		case LAYOUT_PARAMS_TYPE_FRAME_LAYOUT:
			android.widget.FrameLayout.LayoutParams 
			flp = (android.widget.FrameLayout.LayoutParams) view.getLayoutParams();
			orgLayoutParams[LAYOUT_PARAMS_WIDTH] = flp.width;
			orgLayoutParams[LAYOUT_PARAMS_HEIGHT] = flp.height;
			orgLayoutParams[LAYOUT_PARAMS_TOP_MARGIN] = flp.topMargin;
			orgLayoutParams[LAYOUT_PARAMS_LEFT_MARGIN] = flp.leftMargin;
			orgLayoutParams[LAYOUT_PARAMS_BOTTOM_MARGIN] = flp.bottomMargin;
			orgLayoutParams[LAYOUT_PARAMS_RIGHT_MARGIN] = flp.rightMargin;
			// Size
			if (flp.width > 0){
				flp.width = (int) Math.ceil(flp.width * sScale);
				}
			if (flp.height > 0){
				flp.height = (int) Math.ceil(flp.height * sScale);
				}
			// Margin
			flp.topMargin = (int) Math.ceil(flp.topMargin * sScale);
			flp.leftMargin = (int) Math.ceil(flp.leftMargin * sScale);
			flp.bottomMargin = (int) Math.ceil(flp.bottomMargin * sScale);
			flp.rightMargin = (int) Math.ceil(flp.rightMargin * sScale);
			view.setLayoutParams(flp);
			break;
		}

		return orgLayoutParams;
	}


	public static int[] scaleProcessTextView(TextView view, int paramType) {
		if (view == null || sScale == 1.0f){
			return null;
			}
		int[] orgLayoutParams = scaleProcess(view, paramType);
		scaleProcessTextViewTextSize(view);
		return orgLayoutParams;
	}
	

	public static void scaleProcessTextViewTextSize(TextView view) {
		if (view == null || sScale == 1.0f){
			return;
			}
		float size = view.getTextSize();
		size *= sScale;
		view.setTextSize(TypedValue.COMPLEX_UNIT_PX, size);
	}

}

MainActivity如下:

package cn.testviewscaleutil;
import cn.utils.ViewScaleUtil;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.app.Activity;

public class MainActivity extends Activity {
	private TextView mTitleTextView;
	private View mLinearLayout;
	private Button mFirstButton;
	private Button mSecondButton;
	private View mRelativeLayout;
	private ImageView mFirstImageView;
	private ImageView mSecondImageView;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		init();
	}
	private void init(){
		mLinearLayout=findViewById(R.id.linearLayout);
		mTitleTextView=(TextView) findViewById(R.id.titleTextView);
		mLinearLayout=findViewById(R.id.linearLayout);
		mFirstButton=(Button) findViewById(R.id.firstButton);
		mSecondButton=(Button) findViewById(R.id.secondButton);
		mRelativeLayout=findViewById(R.id.relativeLayout);
		mFirstImageView=(ImageView) findViewById(R.id.firstImageView);
		mSecondImageView=(ImageView) findViewById(R.id.secondImageView);
		ViewScaleUtil.setScale(MainActivity.this);
		ViewScaleUtil.scaleProcess(mTitleTextView, ViewScaleUtil.LAYOUT_PARAMS_TYPE_RELATIVE_LAYOUT);
		ViewScaleUtil.scaleProcess(mLinearLayout, ViewScaleUtil.LAYOUT_PARAMS_TYPE_RELATIVE_LAYOUT);
		ViewScaleUtil.scaleProcess(mFirstButton, ViewScaleUtil.LAYOUT_PARAMS_TYPE_LINEAR_LAYOUT);
		ViewScaleUtil.scaleProcess(mSecondButton, ViewScaleUtil.LAYOUT_PARAMS_TYPE_LINEAR_LAYOUT);
		ViewScaleUtil.scaleProcess(mRelativeLayout, ViewScaleUtil.LAYOUT_PARAMS_TYPE_RELATIVE_LAYOUT);
		ViewScaleUtil.scaleProcess(mFirstImageView, ViewScaleUtil.LAYOUT_PARAMS_TYPE_RELATIVE_LAYOUT);
		ViewScaleUtil.scaleProcess(mSecondImageView, ViewScaleUtil.LAYOUT_PARAMS_TYPE_RELATIVE_LAYOUT);
	}
}