Android图片添加文字保存到指定文件夹

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package com.example.imagetest;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.widget.ImageView;
/**
 * 图片上写字demo
 *
 *
* @QQ 7617812 2013-4-23 version 1.0
 */
public class MainActivity extends Activity {
@Override
 protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String str = "要写的文字";
ImageView imageView = (ImageView) this.findViewById(R.id.imageView1);
drawNewBitmap(imageView, str);
}
/**
* 在图片上面写字
*
* @param imageView
* @param str
*/
 private void drawNewBitmap(ImageView imageView, String str) {
Bitmap photo = BitmapFactory.decodeResource(this.getResources(),
R.drawable.ic_launcher);
int width = photo.getWidth();
int hight = photo.getHeight();
System.out.println("宽" + width + "高" + hight);
Bitmap icon = Bitmap
.createBitmap(width, hight, Bitmap.Config.ARGB_8888); // 建立一个空的BItMap
Canvas canvas = new Canvas(icon);// 初始化画布绘制的图像到icon上
Paint photoPaint = new Paint(); // 建立画笔
photoPaint.setDither(true); // 获取跟清晰的图像采样
photoPaint.setFilterBitmap(true);// 过滤一些
Rect src = new Rect(0, 0, photo.getWidth(), photo.getHeight());// 创建一个指定的新矩形的坐标
Rect dst = new Rect(0, 0, width, hight);// 创建一个指定的新矩形的坐标
canvas.drawBitmap(photo, src, dst, photoPaint);// 将photo 缩放或则扩大到
// dst使用的填充区photoPaint
Paint textPaint = new Paint(Paint.ANTI_ALIAS_FLAG
| Paint.DEV_KERN_TEXT_FLAG);// 设置画笔
textPaint.setTextSize(20.0f);// 字体大小
textPaint.setTypeface(Typeface.DEFAULT_BOLD);// 采用默认的宽度
textPaint.setColor(Color.RED);// 采用的颜色
canvas.drawText(str, 20, 26, textPaint);// 绘制上去字,开始未知x,y采用那只笔绘制
canvas.save(Canvas.ALL_SAVE_FLAG);
canvas.restore();
imageView.setImageBitmap(icon);
saveMyBitmap(icon,"test");
 }
/**
* 保存文件到指定的路径下面
* @param bitmap
* @param bitName  文件名字
*/
 public void saveMyBitmap(Bitmap bitmap, String bitName) {
File f = new File("/sdcard/ebs/" + bitName + ".png");
FileOutputStream fOut = null;
try {
f.createNewFile();
fOut = new FileOutputStream(f);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, fOut);
fOut.flush();
fOut.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

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