android實現圖片拼接
阿新 • • 發佈:2019-02-16
通過新建一個矩陣(就是一個整形陣列),然後將要拼接的圖片的color陣列放到矩陣裡,然後再重新畫圖;
package com.test;import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.PublicKey;
import android.R.integer;
import android.R.string;
import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.text.BoringLayout.Metrics;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import android.graphics.*;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.Bitmap.Config;
public class TestActivity extends Activity
{
/** Called when the activity is first created. */
Bitmap maskBitmap;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// setContentView(R.layout.main);
maskBitmap= BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
maskBitmap = BitmapFactory.decodeFile("data/data/com.test/filse/test.gif");
setContentView(new Panel(this));
}
class Panel extends View
{
public Panel(Context context)
{
super(context);
}
public void onDraw(Canvas canvas)
{
canvas.drawColor(Color.BLUE);
int[] pixels = new int[maskBitmap.getByteCount()*4];
for(int i = 0; i < pixels.length; i++)
{
pixels[i] = -2578654;
}
maskBitmap.getPixels(pixels, 0, maskBitmap.getWidth()*2, 0, 0, maskBitmap.getWidth(), maskBitmap.getHeight());
maskBitmap.getPixels(pixels, maskBitmap.getWidth() * maskBitmap.getWidth(), maskBitmap.getWidth(), 0, 0, maskBitmap.getWidth(), maskBitmap.getHeight());
maskBitmap.getPixels(pixels, maskBitmap.getWidth() * maskBitmap.getWidth() * 2, maskBitmap.getWidth(), 0, 0, maskBitmap.getWidth(), maskBitmap.getHeight());
Bitmap newBitmap = Bitmap.createBitmap(pixels, 0, maskBitmap.getWidth(), maskBitmap.getWidth(), maskBitmap.getHeight() * 4,Config.ARGB_8888);
int a = maskBitmap.getHeight();
String b = Integer.toString(a);
Log.v(b, "currentX=" + CONNECTIVITY_SERVICE);
//canvas.drawBitmap(maskBitmap, 10, 10, null);
Bitmap p_1 = BitmapFactory.decodeFile("data/data/com.test/filse/you.jpg");
Bitmap p_2 = BitmapFactory.decodeFile("data/data/com.test/filse/test.jpg");
DisplayMetrics outMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
int s_w = outMetrics.widthPixels;
int s_h = outMetrics.heightPixels;
Log.i("df", s_w + " " + s_h);
float c_w_1 = (float) ((float)s_w / p_1.getWidth() + 0.01);
float c_h_1 = (float) ((float)s_w / p_1.getHeight());
float c_w_2 = (float) ((float)s_w / p_2.getWidth() + 0.01);
float c_h_2 = (float) ((float)s_w / p_2.getHeight());
Log.i("dsf",c_w_1 + " " + c_w_2 + " " + p_2.getWidth());
Matrix _mMatrix = new Matrix();
_mMatrix.postScale(c_w_1, c_h_1);
Bitmap _1 = Bitmap.createBitmap(p_1, 0, 0, p_1.getWidth(), p_1.getHeight(), _mMatrix, true);
Matrix ds = new Matrix();
ds.postScale(c_w_2, c_w_2);
Bitmap _2 = Bitmap.createBitmap(p_2, 0, 0, p_2.getWidth(), p_2.getHeight(), ds, true);
// canvas.drawBitmap(_1, 0, 0, null);
int[] pix = new int[480 * 800 *2];
_1.getPixels(pix, 0, s_w, 0, 0, s_w, _1.getHeight());
_2.getPixels(pix, s_w * _1.getHeight(), s_w, 0, 0, s_w, _2.getHeight());
Log.v("cao ni mei", s_w + " " + _2.getWidth());
Bitmap _3 = Bitmap.createBitmap(pix, 0, s_w, s_w, s_h*2, Config.RGB_565);
Matrix test = new Matrix();
test.postScale((float)4.0, (float)1.0);
// Bitmap t = Bitmap.createBitmap(_3, 0, 0, _3.getWidth(), _3.getHeight(), test, true);
Bitmap t = Bitmap.createScaledBitmap(_3, 400, 400, false);
OutputStream out = null;
try {
out = new FileOutputStream(new File("data/data/com.test/filse/new1.png"));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
t.compress(CompressFormat.JPEG, 100, out);
canvas.drawBitmap(_3, 0, 0, null);
System.exit(0);
/*
float w = (float)(4.0 * 0.1);
float h = (float)(4.0 * 0.1);
Matrix aMatrix = new Matrix();
aMatrix.postScale(w, h);
Bitmap aBitmap = Bitmap.createBitmap(maskBitmap, 0, 0, maskBitmap.getWidth(), maskBitmap.getHeight(), aMatrix, true);
// canvas.drawBitmap(newBitmap, 10, 10, null);
// canvas.drawBitmap(aBitmap, 100, 10, null);
Log.i("origin",Integer.toString(maskBitmap.getHeight()));
Log.i("new", Integer.toString(aBitmap.getHeight()));
*/
}
}
}
網上的另一種方法:
在android中拼接圖片,可以先生成空的點陣圖,然後在往裡面依次drawBitmap,不過要注意記憶體的使用,可以先縮小1/2後拼接起來
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