如何进行对图片的切割

来源：互联网发布：捷世高软件编辑：程序博客网时间：2024/05/01 11:39

一：要达到的效果

二：布局使用了GridLayout（五列三行）

<?xml version="1.0" encoding="utf-8"?><RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.kirito.puzzlegame.MainActivity">    <ScrollView        android:layout_width="match_parent"        android:layout_height="match_parent">        <HorizontalScrollView            android:layout_width="match_parent"            android:layout_height="match_parent">            <GridLayout                android:id="@+id/gl"                android:columnCount="3"                android:rowCount="5"                android:layout_width="wrap_content"                android:layout_height="wrap_content"/>        </HorizontalScrollView>    </ScrollView></RelativeLayout>

三：以二维数组来表示图片切割的各个部分，使用createBitmap方法切割图片，使用gridlayout的addview方法把图片块添加进去

package com.example.kirito.puzzlegame;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.drawable.BitmapDrawable;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.animation.Animation;import android.view.animation.RotateAnimation;import android.view.animation.TranslateAnimation;import android.widget.GridLayout;import android.widget.ImageView;import android.widget.Toast;public class MainActivity extends AppCompatActivity {    private ImageView ivs[][] = new ImageView[5][3];    private GridLayout gl;    private ImageView null_iv;    private static final String TAG = "MainActivity";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        gl = (GridLayout) findViewById(R.id.gl);        //从drawable下获取图片资源并将其转为bitmap        Bitmap bm = ((BitmapDrawable)getResources().getDrawable(R.drawable.a)).getBitmap();        int bm_height = bm.getHeight() / 5;        int bm_width = bm.getWidth() / 3;        for (int i = 0; i < ivs.length; i++) {            for (int j = 0; j < ivs[0].length; j++) {                ivs[i][j] = new ImageView(this);                //通过bitmap的createBitmap方法来切割图片，把完整图片分割成五行三列                /**                 * createBitmap方法解析                 * Bitmap.createBitmap(source, 60, 0, 480, 260); // 320 - 60 = 260                 Basically, you are drawing from x = 60, y = 0 to x = 480 + 60, y = 260 on a Bitmap                 */                //完整分割图片                Bitmap bp = Bitmap.createBitmap(bm,j * bm_width,i * bm_height,bm_width,bm_height);                ivs[i][j].setImageBitmap(bp);                //这种均等切割为正方形的方式，最终只会显示原图的一部分，即把原图左上角部分的正方形切割下来，其他的就舍弃了                /*Bitmap bp = Bitmap.createBitmap(bm,j * bm_height,i * bm_height,bm_height,bm_height);                ivs[i][j].setImageBitmap(bp);*/                ivs[i][j].setPadding(2,2,2,2);                            }        }        for (int i = 0; i < ivs.length; i++) {            for (int j = 0; j < ivs[0].length; j++) {                //通过给gridview添加切割好的小图片                gl.addView(ivs[i][j]);            }        }            }    }

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