学习Android切割图片并保存到项目文件夹

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学习如何在Android 里将一张图片切割成几张的图片，并保存到相应项目的文件夹下。

布局：行数，列数，图片，按钮切割

布局文件：

<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:orientation="vertical"    tools:context="${relativePackage}.${activityClass}" >    <LinearLayout        android:layout_width="match_parent"        android:layout_height="60dp"        android:orientation="horizontal" >        <LinearLayout            android:layout_width="150dp"            android:layout_height="match_parent"            android:orientation="vertical" >            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="@string/rows" />            <EditText                android:id="@+id/edRows"                android:layout_width="match_parent"                android:layout_height="wrap_content" />        </LinearLayout>        <LinearLayout            android:layout_width="150dp"            android:layout_height="match_parent"            android:orientation="vertical" >            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="@string/cols" />            <EditText                android:id="@+id/edCols"                android:layout_width="match_parent"                android:layout_height="wrap_content" />        </LinearLayout>    </LinearLayout>    <ImageView        android:id="@+id/orgImg"        android:layout_width="wrap_content"        android:layout_height="300dp"        android:src="@drawable/orgimg" />    <Button        android:id="@+id/btCut"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="10dp"        android:text="@string/cut" /></LinearLayout>

MainActiviey:

package com.lyang.cutimage;import android.app.Activity;import android.content.Intent;import android.content.res.Resources;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity {private EditText edRows, edCols;private int row, col;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                edRows = (EditText) findViewById(R.id.edRows);        edCols = (EditText) findViewById(R.id.edCols);                Button btnCut = (Button) findViewById(R.id.btCut);        btnCut.setOnClickListener(new btnCutClickLister());            }        private final class btnCutClickLister implements OnClickListener{@Overridepublic void onClick(View v) {/* * 得到行数和列数 */int rows, cols;String str;str = edRows.getText().toString();            try {                 rows = Integer.parseInt(str);                              } catch (Exception e) {                 rows = 1;            }str = edCols.getText().toString();            try {                 cols = Integer.parseInt(str);                              } catch (Exception e) {             cols = 1;            }            /*             * 取得要切割的图片             */            Resources res = getResources();              Bitmap bmp = BitmapFactory.decodeResource(res, R.drawable.orgimg);                                     /*             * 切割图片             */            ImageCut imgCut = new ImageCut();            imgCut.context = MainActivity.this;            if (imgCut.cutImage(bmp, cols, rows)) {            Toast.makeText(MainActivity.this, "切割成功", Toast.LENGTH_SHORT).show();            } else {            Toast.makeText(MainActivity.this, "切割失败", Toast.LENGTH_SHORT).show();            }}    }}

切割图片的类：

package com.lyang.cutimage;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import android.content.Context;import android.graphics.Bitmap;public class ImageCut {public Context context;

<span style="white-space:pre"></span>/*

<span style="white-space:pre"></span> *切割图片

<span style="white-space:pre"></span>*/public Boolean cutImage(Bitmap bmp, int cols, int rows) {int width = bmp.getWidth();int height = bmp.getHeight();int oneWidth = width / cols;int oneHeight = height / rows;for (int i = 0; i < rows; i++) {for (int j = 0; j < cols; j++) {int xValue = j * oneWidth;int yValue = i * oneHeight;Bitmap newBmp = Bitmap.createBitmap(bmp, xValue, yValue,oneWidth, oneHeight);saveImage(newBmp, "Cut_" +Integer.toString(i * rows + j)+ ".jpg");}}return true;}/* * 保存图片到项目文件夹下 */public void saveImage(Bitmap bmp, String picName) {// 得到项目文件夹 /data/data/com.xxxx.xxxx/filesFile f = new File(context.getFilesDir().getAbsolutePath(), picName);if (f.exists()) {f.delete();}try {FileOutputStream out = new FileOutputStream(f);bmp.compress(Bitmap.CompressFormat.JPEG, 90, out);out.flush();out.close();} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}public Context getContext() {return context;}public void setContext(Context context) {this.context = context;}}

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