移動(dòng)應(yīng)用開發(fā)技術(shù)的課程設(shè)計(jì)

#2020年4月19日publicvoidsave(Viewview){if(checkDate()||checkStartTime())return;StringBuilderresult=newStringBuilder();result.append(date.getText().toString()+"");result.append(startTime.getText().toString()+"-");result.append(item.getText().toString());try{if(this.getIntent().getStringExtra("flag").equals("change")){intindex=getIntent().getExtras().getInt("position");Stringline="";StringBuildersb=newStringBuilder();FileInputStreamin=openFileInput("item");BufferedReaderbr=newBufferedReader(newInputStreamReader(in));for(inti=0;i<index;i++){sb.append(br.readLine()+"\n");}br.readLine();sb.append(result.toString()+"\n");while(true){if((line=br.readLine())!=null)sb.append(line+"\n");elsebreak;}FileOutputStreamout=openFileOutput("item",MODE_PRIVAT);PrintStreamps=newPrintStream(out);ps.print(sb.toString());ps.close();out.close();Toast.makeText(this,"保存完畢！",ToastLENGTH_LONG).show();Intentintent=getIntent();setResult(0x111,intent);finish();}else{FileOutputStreamout=openFileOutput("item",MODE_APPEND);PrintStreamps=newPrintStream(out);ps.println(result.toString());ps.close();out.close();Toast.makeText(this,"保存完畢！",ToastLENGTH_LONG).show();Intentintent=getIntent();setResult(0x111,intent);finish();}}catch(Exceptione){e.printStackTrace();}publicbooleancheckDate(){if(date.getText().toString().equals"")){Toast.makeText(this,"日期不能為空！",ToastLENGTH_LONG).show();returnfalse;}returnfalse;}publicbooleancheckStartTime(){if(startTime.getText().toString().equals"")){Toast.makeText(this,"時(shí)間不能為空！",ToastLENGTH_LONG).show();returntrue;}returnfalse;事務(wù)查詢代碼publicString[]splitString(Strings){String[]ss=newString[3];intfirstIndex=0,secondIndex=0,flag=0;chara[]=s.toCharArray();for(inti=0;i<a.length;i++){if(a[i]=='')if(flag==0){firstIndex=i;flag=1;}else{break;}}if(a[i]=='-'){secondIndex=i;}}ss[0]=s.substring(0,firstIndex);ss[1]=s.substring(firstIndex+1,secondIndex);ss[2]=s.substring(secondIndex+1,s.length());returnss;}事務(wù)刪除代碼publicvoiddelete(Viewview){intindex=getIntent().getExtras().getInt("position");Stringline="";StringBuildersb=newStringBuilder();try{FileInputStreamin=openFileInput("item");BufferedReaderbr=newBufferedReader(newInputStreamReader(in));for(inti=0;i<index;i++){sb.append(br.readLine()+"\n");}br.readLine();while(true){if((line=br.readLine())!=null)sb.append(line+"\n");elsebreak;}FileOutputStreamout=openFileOutput("item",MODE_PRIVATE);PrintStreamps=newPrintStream(out);ps.print(sb.toString());ps.close();out.close();Toast.makeText(this,"刪除成功！",ToastLENGTH_LONG).show();Intentintent=getIntent();setResult(0x111,intent);finish();}catch(Exceptione){e.printStackTrace();}}事務(wù)修改代碼setActivity.setText("修改");title.setText("事務(wù)管理")；delete.setVisibility(View.VISIBL);intindex=getIntent().getExtras().getInt("position")；//Toast.makeText(this,""+index,Toast.LENGTH_LONG).show()；FileInputStreamin；Stringline=""；try{in=openFileInput("item")；BufferedReaderbr=newBufferedReader(newInputStreamReader(in))；for(inti=0;i<=index;i++){line=br.readLine();}//Toast.makeText(this,line,Toast.LENGTH_LONG).show();String[]s=splitString(line);date.setText(s[0]);startTime.setText(s[1]);item.setText(s[2]);}catch(Exceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}5.2收支功能實(shí)現(xiàn)5.2.1收支新增代碼save.setOnClickListener(newView.OnClickListener(){@OverridepublicvoidonClick(Viewview){//TODOAuto-generatedmethodstubStringt=time.getText().toString();Stringi=income.getText().toString();Stringo=outcome.getText().toString();db.execSQL("insertintoshouruvalues(?,?,?)",newString[]{t,i,o});Toast.makeText(Mbook.this,"保存成功",ToastLENGTH_SHORT).show();5.2.2收支查詢代