Android中复制图片的实例代码

<LinearLayout 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"  android:paddingBottom="@dimen/activity_vertical_margin"  android:paddingLeft="@dimen/activity_horizontal_margin"  android:paddingRight="@dimen/activity_horizontal_margin"  android:paddingTop="@dimen/activity_vertical_margin"  android:orientation="vertical"  tools:context=".MainActivity" > <ImageView   android:id="@+id/iv_one"   android:layout_width="wrap_content"   android:layout_height="wrap_content"/> <ImageView   android:id="@+id/iv_two"   android:layout_width="wrap_content"   android:layout_height="wrap_content"/></LinearLayout>

public class MainActivity extends Activity {  private ImageView ivOne;  private ImageView ivTwo;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    //1.获取图片控件    ivOne = (ImageView) findViewById(R.id.iv_one);    ivTwo = (ImageView) findViewById(R.id.iv_two);    //2.把tomcat.png 转换成bitmap 然后显示到iv_src     Bitmap srcBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.tomcat);    //3.将原图放置在第一个控件中    ivOne.setImageBitmap(srcBitmap);    //4.创建原图模板    Bitmap copybitmap = Bitmap.createBitmap(srcBitmap.getWidth(), srcBitmap.getHeight(), srcBitmap.getConfig());    //5.想作画 需要一个画布  以copybitmap为模板     Canvas canvas = new Canvas(copybitmap);    //6.创建一个画笔     Paint paint = new Paint();    //7.开始作画  srcBitmap参考原图去画    canvas.drawBitmap(srcBitmap, new Matrix(), paint);    for (int i = 0; i < 10; i++) {      //[一次修改多个像素]      copybitmap.setPixel(20+i,30, Color.RED);    }    //8.把copybitmap显示到ivTwo上    ivTwo.setImageBitmap(copybitmap);      }}