<!-- 在SDCard中创建与删除文件权限 -->

 <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

 <!-- 往SDCard写入数据权限 -->

 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

 <?xml version="1.0" encoding="utf-8"?>

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"

     package="com.demo.picturetest"

     android:versionCode="1"

     android:versionName="1.0" >  

     <!-- 在SDCard中创建与删除文件权限 -->

     <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

     <!-- 往SDCard写入数据权限 -->

     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />  

     <uses-sdk

         android:minSdkVersion="8"

         android:targetSdkVersion="19" />  

     <application

         android:allowBackup="true"

         android:icon="@drawable/ic_launcher"

         android:label="@string/app_name"

         android:theme="@style/AppTheme" >

         <activity

             android:name=".MainActivity"

             android:label="@string/app_name" >

             <intent-filter>

                 <action android:name="android.intent.action.MAIN" />  

                 <category android:name="android.intent.category.LAUNCHER" />

             </intent-filter>

         </activity>

     </application>  

 </manifest>  

 package com.demo.picturetest;  

 import java.io.File;

 import java.io.FileNotFoundException;

 import java.io.FileOutputStream;

 import java.io.IOException;  

 import android.app.Activity;

 import android.graphics.Bitmap;

 import android.graphics.Bitmap.Config;

 import android.graphics.BitmapFactory;

 import android.graphics.Canvas;

 import android.graphics.Color;

 import android.graphics.Paint;

 import android.os.Bundle;

 import android.os.Environment;

 import android.util.Log;

 import android.widget.ImageView;  

 public class MainActivity extends Activity {

     private Bitmap mBitmap;

     // 画布

     private Canvas mCanvas;

     // 画笔－－画图片

     private Paint mPicturePaint = new Paint();

     // 画笔－－写字

     private Paint mTextPaint = new Paint();

     // 画笔－－写运动数据

     private Paint mDataPaint = new Paint();  

     private ImageView mImageView;  

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         drawBitmap();

         init();

         // 展示

         mImageView.setImageBitmap(mBitmap);  

     }  

     private void init() {

         mImageView = (ImageView) findViewById(R.id.mImageView);

     }  

     /**

      * 根据图片和文字生成图片

      * */

     private void drawBitmap() {  

         Bitmap bm_bg = BitmapFactory.decodeResource(getResources(),

                 R.drawable.dashboard_bg);

         // 得到图片的宽、高

         int width_bg = bm_bg.getWidth();

         int height_bg = bm_bg.getHeight();  

         // 创建一个你需要尺寸的Bitmap

         mBitmap = Bitmap.createBitmap(width_bg, height_bg, Config.ARGB_8888);

         // 用这个Bitmap生成一个Canvas,然后canvas就会把内容绘制到上面这个bitmap中

         mCanvas = new Canvas(mBitmap);  

         // 绘制背景图片

         mCanvas.drawBitmap(bm_bg, 0.0f, 0.0f, mPicturePaint);

         // 绘制图片

         Bitmap bm_head = BitmapFactory.decodeResource(getResources(),

                 R.drawable.share_head_img);  

         // 得到图片的宽、高

         int width_head = bm_head.getWidth();

         int height_head = bm_head.getHeight();

         // 绘制图片－－保证其在水平方向居中

         mCanvas.drawBitmap(bm_head, (width_bg - width_head) / 2, 0.0f,

                 mPicturePaint);  

         // 绘制文字

         mTextPaint.setColor(Color.WHITE);// 白色画笔

         mTextPaint.setTextSize(80.0f);// 设置字体大小  

         // 绘制文字

         mDataPaint.setColor(Color.RED);// 红色画笔

         mDataPaint.setTextSize(120.0f);// 设置字体大小  

         String distanceTextString = "运动距离：";

         String distanceDataString = String.valueOf(888);

         String distanceScalString = "米";  

         float distanceTextString_width = mTextPaint.measureText(

                 distanceTextString, 0, distanceTextString.length());  

         float distanceDataString_width = mDataPaint.measureText(

                 distanceDataString, 0, distanceDataString.length());

         float distanceScalString_width = mTextPaint.measureText(

                 distanceScalString, 0, distanceScalString.length());

         float x = (width_bg - distanceTextString_width

                 - distanceDataString_width - distanceScalString_width) / 2;  

         mCanvas.drawText(distanceTextString, x, height_head, mTextPaint);// 绘制文字

         mCanvas.drawText(distanceDataString, x + distanceTextString_width,

                 height_head, mDataPaint);// 绘制文字  

         mCanvas.drawText(distanceScalString, x + distanceTextString_width

                 + distanceDataString_width, height_head, mTextPaint);// 绘制文字  

         // 保存绘图为本地图片

         mCanvas.save(Canvas.ALL_SAVE_FLAG);

         mCanvas.restore();  

         File file = new File(Environment.getExternalStorageDirectory()

                 .getPath() + "/share_pic.png");// 保存到sdcard根目录下，文件名为share_pic.png

         Log.i("CXC", Environment.getExternalStorageDirectory().getPath());

         FileOutputStream fos = null;

         try {

             fos = new FileOutputStream(file);

             mBitmap.compress(Bitmap.CompressFormat.PNG, 50, fos);  

         } catch (FileNotFoundException e) {

             // TODO Auto-generated catch block

             e.printStackTrace();

         }

         try {

             fos.close();

         } catch (IOException e) {

             // TODO Auto-generated catch block

             e.printStackTrace();

         }  

     }

 }