合并两个位图并保存为一个图像

Question

我正在尝试合并两个位图并将其设置到 imageview 中，并在我单击按钮时保存该位图，但是当我合并位图将其设置为图像时，它显示的第二个位图比实际的大 size.here 是我的代码：

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        getBitmap(image1);
        Bitmap drawingBitmap = Bitmap.createBitmap(parts.getWidth(),
                            parts.getHeight(),Bitmap.Config.ARGB_8888);
        canvas = new Canvas(drawingBitmap);

        canvas.drawBitmap(parts,0,0,null);
        canvas.drawBitmap(touch,0,0,null);

        bit=drawingBitmap;

        public void getBitmap(View v) {
            Bitmap bitmap= Bitmap.createBitmap(v.getWidth(),v.getHeight(), Bitmap.Config.ARGB_8888);
            Canvas c = new Canvas(bitmap);
            v.draw(c);

        touch=bitmap;
    }

    Button btn = (Button) findViewById(R.id.button);

    btn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            SaveImage save = new SaveImage();
            save.Save(getApplicationContext(),bit);
        }
    });

}

这里parts是hold camera picture的位图，image1是动态创建的imageview。

SaveImage.java

package com.example.tattoodesign;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.media.MediaScannerConnection;
import android.net.Uri;
import android.os.Environment;
import android.widget.Toast;

public class SaveImage {

    private Context TheThis;
    private String NameOfFolder = "/PaintImage";
    public String NameOfFile = null;
    //private ArrayList<Bitmap> images = null;

     public void Save(Context context,Bitmap ImageToSave){
            TheThis = context;
            String file_path = Environment.getExternalStorageDirectory().getAbsolutePath()+ NameOfFolder;
            String CurrentDateAndTime= getCurrentDateAndTime();
            File dir = new File(file_path);
            NameOfFile="PaintImage"+CurrentDateAndTime+ ".jpg";

            if(!dir.exists()){
               dir.mkdirs();
            }

            File file = new File(dir,NameOfFile);
            if (file.exists ()) file.delete ();
            try {
                FileOutputStream fOut = new FileOutputStream(file);
                ImageToSave.compress(Bitmap.CompressFormat.JPEG, 85, fOut);
                fOut.flush();
                fOut.close();
                MakeSureFileWasCreatedThenMakeAvabile(file);

            }
            catch (FileNotFoundException e) {
                UnableToSave();}
            catch (IOException e){
                UnableToSave();
            }

        }

    private void MakeSureFileWasCreatedThenMakeAvabile(File file) {
        MediaScannerConnection.scanFile(TheThis,
                new String[] { file.toString() }, null,
                new MediaScannerConnection.OnScanCompletedListener() {
                    public void onScanCompleted(String path, Uri uri) {
                    }
                });

    }

    private String getCurrentDateAndTime() {
        Calendar c = Calendar.getInstance();
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
        String formattedDate = df.format(c.getTime());
        return formattedDate;
    }

    private void UnableToSave() {
        Toast.makeText(TheThis, "Picture cannot to gallery", Toast.LENGTH_SHORT)
                .show();

    }
  }

我该如何解决这个问题？

如有任何帮助，我们将不胜感激。

谢谢。

Answer 1

不太可能显示图片 "bigger than it's real size"。它更有可能 "real size" 与您想象的不一样。

请记住，外观尺寸与像素 width/height 和 dpi 有关。

我认为您应该考虑缩放其中一张图像以匹配另一张图像。例如，参见 Bitmap.createScaledBitmap

合并两个位图并保存为一个图像

combine two bitmap and save as one image

android

bitmap