Question

我是android的新手并尝试将三个图像合并到canvas.as你将在我的代码中看到使用三个图像。但在画布中只有两个图像显示第一个和最后一个，看起来像在画布中绘制时丢失了中间图像（沙漠）。这是代码

代码： -

package com.example.combineimage;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;

import android.os.Bundle;
import android.os.IInterface;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class CombineActivity extends Activity {

    private Bitmap image1,image2,image3,combo_image,image1newsize,image2newsize,image3newsize,merge_image;
    Context mcontext;
    private InputStream inputis1,inputis2,inputis3;
    private Button click_to_combine;
    private final int fixedimage_size=100;
    private ImageView final_imageview;
    int blurValue = 5;
    ArrayList<Bitmap> myimage_list;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_combine);
        mcontext=CombineActivity.this;

        click_to_combine=(Button) findViewById(R.id.button_click);

        final_imageview=(ImageView) findViewById(R.id.imageView1);

        myimage_list=new ArrayList<Bitmap>();

        try{
            inputis1=mcontext.getResources().openRawResource(R.drawable.koala);
        image1=BitmapFactory.decodeStream(inputis1);
        image1newsize=resize_image(image1);
        inputis2=mcontext.getResources().openRawResource(R.drawable.desert);
         image2 = BitmapFactory.decodeStream(inputis2);
         image2newsize=resize_image(image2);
         inputis3 =mcontext.getResources().openRawResource(R.drawable.jellyfish);
         image3=BitmapFactory.decodeStream(inputis3);
         image3newsize=resize_image(image3);

         myimage_list.add(image1newsize);
         myimage_list.add(image2newsize);
         myimage_list.add(image3newsize);
        }
        finally
        {
            try {
                inputis2.close();
                inputis2.close();
                inputis3.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

        click_to_combine.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                merge_image=merge_given_image(myimage_list);

                final_imageview.setImageBitmap(merge_image);
            }
        });

    }

    protected Bitmap merge_given_image(ArrayList<Bitmap> myimage_list2) {
        // TODO Auto-generated method stub
        Rect srcrect,destrect;
        Bitmap combobitmap;
        int total_width=0,total_height=0;
        int total_image=myimage_list2.size();
        int count=0;
        Canvas mcanvas;
        Bitmap temp_bitmap=null;
        for(int i=0;i<total_image;i++)
        {
             temp_bitmap=myimage_list2.get(i);
            total_width=total_width+temp_bitmap.getWidth();
            Log.e("Total size", ".."+total_width+total_image);

        }
        total_height=temp_bitmap.getHeight();
        Log.e("Total size", ".."+total_height);
        combobitmap=Bitmap.createBitmap(total_width, total_height, Bitmap.Config.ARGB_8888);
        mcanvas=new Canvas(combobitmap);

        for(int i=0;i<total_image;i++)
        {
            srcrect=new Rect(0, 0, myimage_list2.get(i).getWidth(), myimage_list2.get(i).getHeight());
            destrect=new Rect(srcrect);
            if(i!=0)
            {
                destrect.offset(myimage_list2.get(i-1).getWidth(), 0);

                count=count+1;
                Log.e("COUNT", ".."+count);
            }

            mcanvas.drawBitmap(myimage_list2.get(i), srcrect, destrect, null);

        }

        return combobitmap;
    }

    private Bitmap resize_image(Bitmap image_org) {


        int org_width=image_org.getWidth();
        int org_height=image_org.getHeight();

        int newheight=fixedimage_size;
        int newwidth=fixedimage_size;

        float scalewidth=((float)newwidth)/org_width;
        float scaleheight=((float)newheight)/org_height;

        Matrix matrix=new Matrix();

        matrix.postScale(scalewidth, scaleheight);

        Bitmap newsizeimage=Bitmap.createBitmap(image_org, 0, 0, org_width, org_height, matrix, true);

        return newsizeimage;
        // TODO Auto-generated method stub



    }

    protected Bitmap merge_given_image(Bitmap image_first, Bitmap image_second,
            Bitmap image_third) {
        // TODO Auto-generated method stub


        Bitmap combobitmap;
        //BlurMaskFilter blurfilter;
        //Paint paintblur=new Paint();

        int total_width,total_height;


        total_width=image_first.getWidth()+image_second.getWidth()+image_third.getWidth();
        total_height=image_first.getHeight();


        combobitmap=Bitmap.createBitmap(total_width, total_height, Bitmap.Config.ARGB_8888);
        Canvas combocanvas=new Canvas(combobitmap);


//      //Create background in White
//       Bitmap alpha = combobitmap.extractAlpha();
//       paintblur.setColor(Color.WHITE);
//       combocanvas.drawBitmap(combobitmap, 0, 0, paintblur);

//      //Create outer blur, in White
//       blurfilter = new BlurMaskFilter(blurValue, BlurMaskFilter.Blur.OUTER);
//       paintblur.setMaskFilter(blurfilter);
//       combocanvas.drawBitmap(combobitmap, 0, 0, paintblur);

//      //Create inner blur
//       blurfilter = new BlurMaskFilter(blurValue, BlurMaskFilter.Blur.INNER);
//       paintblur.setMaskFilter(blurfilter);
//       combocanvas.drawBitmap(combobitmap, 0, 0, paintblur);


        combocanvas.drawBitmap(image_first,0f, 0f, null);
        combocanvas.drawBitmap(image_second, (image_first.getWidth()/2), 0f, null);
        combocanvas.drawBitmap(image_third, image_second.getWidth(), 0f, null);

        return combobitmap;

    }

    @Override
    protected void onPause() {
        // TODO Auto-generated method stub
        image1.recycle();
        image1newsize.recycle();
        image2.recycle();
        image2newsize.recycle();
        image3.recycle();
        image3newsize.recycle();
        super.onPause();
    }


}

在上面的代码中你会发现两个方法一个有三个位图，一个方法有三个图像的arraylist。所以在三个图像显示前两个图像的一半有一些修改，即combocanvas.drawBitmap(image_second, (image_first.getWidth()/2), 0f, null);但是arraylist的方法只显示两个图像。输出的快照也是 sanpshot of output 。我跟着并通过他的链接 1：merging image with rect draw 2：merging image in canvas

但没有获得所需的输出，所以任何人都可以告诉我在哪里做错了。任何帮助都会非常有帮助。谢谢

在android中向画布添加两个以上的图像

0 个答案: