合併倆張圖片

import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.Rect;

import android.graphics.drawable.BitmapDrawable;

import android.os.Bundle;

import android.os.Handler;

import android.os.Handler.Callback;

import android.os.Message;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageView;

 

public class MainActivity extends Activity {

 

    private ImageView ivBmp1;

    private ImageView ivBmp2;

    private ImageView ivBmpMerge;

    private Button mergeBtn;

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        initUi();

    }

 

    private void initUi() {

        ivBmp1 = (ImageView) findViewById(R.id.iv_bmp1);

        ivBmp2 = (ImageView) findViewById(R.id.iv_bmp2);

        ivBmpMerge = (ImageView) findViewById(R.id.iv_bmp_merge);

        mergeBtn = (Button) findViewById(R.id.btn_merge);

        mergeBtn.setOnClickListener(new OnClickListener() {

 

            @Override

            public void onClick(View v) {

                showMergeBitmap();

            }

        });

 

    }

 

    private Handler handler = new Handler(new Callback() {

 

        @Override

        public boolean handleMessage(Message msg) {

            Bitmap bitmap = (Bitmap) msg.obj;

            ivBmpMerge.setImageBitmap(bitmap);

            return false;

        }

    });

 

    /**

     * 顯示合併的圖

     */

    protected void showMergeBitmap() {

        new Thread(new Runnable() {

 

            @Override

            public void run() {

                Bitmap bitmap = mergeBitmap();

                Message messge = handler.obtainMessage();

                messge.obj = bitmap;

                handler.sendMessage(messge);

            }

        }).start();

    }

 

    /*

     * 使用Canvas合併Bitmap

     */

    private Bitmap mergeBitmap() {

        // 獲取ImageView上得Bitmap圖片

        Bitmap bmp1 = ((BitmapDrawable) ivBmp1.getDrawable()).getBitmap();

        Bitmap bmp2 = ((BitmapDrawable) ivBmp2.getDrawable()).getBitmap();

 

        // 創建空得背景bitmap

        // 生成畫布圖像

        Bitmap resultBitmap = Bitmap.createBitmap(ivBmpMerge.getWidth(),

                ivBmpMerge.getHeight(), Bitmap.Config.RGB_565);

        Canvas canvas = new Canvas(resultBitmap);// 使用空白圖片生成canvas

 

        // 將bmp1繪製在畫布上

        Rect srcRect = new Rect(0, 0, bmp1.getWidth(), bmp1.getHeight());// 截取bmp1中的矩形區域

        Rect dstRect = new Rect(0, 0, ivBmpMerge.getWidth() / 2,

                ivBmpMerge.getHeight());// bmp1在目標畫布中的位置

        canvas.drawBitmap(bmp1, srcRect, dstRect, null);

 

        // 將bmp2繪製在畫布上

        srcRect = new Rect(0, 0, bmp2.getWidth(), bmp2.getHeight());// 截取bmp1中的矩形區域

        dstRect = new Rect(ivBmpMerge.getWidth() / 2, 0, ivBmpMerge.getWidth(),

                ivBmpMerge.getHeight());// bmp2在目標畫布中的位置

        canvas.drawBitmap(bmp2, srcRect, dstRect, null);

        // 將bmp1,bmp2合併顯示

        return resultBitmap;

    }

 

}










運行效果