Android实现可以图文混合和长截图的日记本App，优秀安卓课程设计！

package com.example.lenovo.mynotebook.function; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.drawable.BitmapDrawable; import android.os.Environment; import android.text.Spannable; import android.text.SpannableString; import android.text.style.ImageSpan; import android.util.DisplayMetrics; import android.util.Log; import android.widget.EditText; import android.widget.ScrollView; import com.example.lenovo.mynotebook.MainActivity; import com.example.lenovo.mynotebook.R; import com.example.lenovo.mynotebook.db.DBdataSource; import com.example.lenovo.mynotebook.model.NoteInfo; import com.example.lenovo.mynotebook.ui.MessageBox; import com.example.lenovo.mynotebook.ui.UiHelper; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.regex.Matcher; import java.util.regex.Pattern; import java.io.FileDescriptor; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; /* 封装一些操作编辑器的方法 */ public class NoteWrapper { /* 此接口的作用是想edit_activity传送一个新的NoteInfo */ public interface INoteInfo{ void getANewNote(NoteInfo noteInfo); } public NoteWrapper (INoteInfo iNoteInfo,Context contexts) { this.iNoteInfo=iNoteInfo; context=contexts; } private static Context context; private static String TAG = "Listview and ScrollView item 截图:"; public static final String PARTENIMAGEPATH="/sdcard/myImage/[0-9]*.jpg"; private INoteInfo iNoteInfo=null; private DBdataSource dBdataSource=null; private NoteInfo noteInfo=null; private MessageBox messageBox=null; private Intent intent=null; private String name; private String type; /* 将插入如的图片保存到文件并返回路径名 */ public String SaveToFile(String FilePath,String name,Bitmap bitmap){ FileOutputStream FOut = null; File file = new File(FilePath); // File file=StorageUtils.getOwnCacheDirectory file.mkdirs();// 创建文件夹 String fileName = FilePath+name; File pfile = new File(FilePath,name); try { FOut = new FileOutputStream(pfile); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, FOut);// 把数据写入文件 } catch (FileNotFoundException e) { e.printStackTrace(); }finally { try { FOut.flush(); FOut.close(); } catch (IOException e) { e.printStackTrace(); } } return fileName; } /* 内容中是否包含图片 */ public boolean isHaveImage(String content){ Pattern p=Pattern.compile(PARTENIMAGEPATH); Matcher m=p.matcher(content); if(m.find()) return true; else return false; } /* 将截图保存到文件 */ public File bitMap2File(Bitmap bitmap) { String path = ""; if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) { path = Environment.getExternalStorageDirectory() + File.separator;//保存到sd根目录下 } // File f = new File(path, System.currentTimeMillis() + ".jpg"); File f = new File(path, "share" + ".jpg"); if (f.exists()) { f.delete(); } try { FileOutputStream out = new FileOutputStream(f); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out); out.flush(); out.close(); bitmap.recycle(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { return f; } } /* 截图压缩 */ public Bitmap compressImage(Bitmap image) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); image.compress(Bitmap.CompressFormat.JPEG, 10, baos);//质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中 int options = 100; while (baos.toByteArray().length / 1024 > 400) { //循环判断如果压缩后图片是否大于400kb,大于继续压缩（这里可以设置大些） baos.reset();//重置baos即清空baos image.compress(Bitmap.CompressFormat.JPEG, options, baos);//这里压缩options%，把压缩后的数据存放到baos中 options -= 10;//每次都减少10 } ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());//把压缩后的数据baos存放到ByteArrayInputStream中 Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);//把ByteArrayInputStream数据生成图片 return bitmap; } /* 获取ScrollView的截屏长图 */ public static Bitmap getScrollViewBitmap(ScrollView scrollView, String picpath) { int h = 0; Bitmap bitmap=null; // 获取listView实际高度 for (int i = 0; i < scrollView.getChildCount(); i++) { h += scrollView.getChildAt(i).getHeight(); } //从drable文件中获取背景图片转换成Bitmap Bitmap icon = BitmapFactory.decodeResource(context.getResources(), R.drawable.timg); //然后根据ScrollView的实际高度拉伸背景图片 icon=Bitmap.createScaledBitmap(icon,scrollView.getWidth(),h,true); Log.d(TAG, "实际高度:" + h); Log.d(TAG, " 高度:" + scrollView.getHeight()); // 创建对应大小的bitmap,此时这个Bitmap还未画上任何团 bitmap = Bitmap.createBitmap(scrollView.getWidth(), h, Bitmap.Config.ARGB_8888); final Canvas canvas = new Canvas(bitmap); //将拉伸好的背景图片覆盖上去,画布就创建好了 canvas.drawBitmap(icon,0,0,null); //将ScrollView的内容画到画布上 scrollView.draw(canvas); return bitmap; } //计算图片的缩放值 public int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) { final int height = options.outHeight; final int width = options.outWidth; int inSampleSize = 1; if (height > reqHeight || width > reqWidth) { final int heightRatio = Math.round((float) height / (float) reqHeight); final int widthRatio = Math.round((float) width / (float) reqWidth); inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio; } return inSampleSize; } /* 获取图片的比例 */ public BitmapFactory.Options getBili(int reqWidth, int reqHeight){ final BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; // Calculate inSampleSize options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); // Decode bitmap with inSampleSize set options.inJustDecodeBounds = false; return options; } /* 进一步修饰图片大小 */ public Bitmap jinyibu(Bitmap bitmap,Context context){ DisplayMetrics dm = context.getResources().getDisplayMetrics(); int w_screen = dm.widthPixels; int w_width = w_screen; int b_width = bitmap.getWidth(); int b_height = bitmap.getHeight(); int w_height = w_width * b_height / b_width; bitmap = Bitmap.createScaledBitmap(bitmap, w_width, w_height, false); return bitmap; } /* 解析内容：用到了正则表达式 获取EditView的