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1、添加功能的view页面部分

实际效果如下：

2、以下为上面view的实现代码，通过继承edittext，自定义一些风格，如文字颜色变成蓝色，为每一行文字添加下划线等。

public class LinedEditText extends EditText {	private Rect mRect;	private Paint mPaint;	//构造函数	public LinedEditText(Context context, AttributeSet attrs) {		super(context, attrs);		mRect = new Rect();		//设置颜料颜色为蓝色		mPaint = new Paint();		mPaint.setColor(Color.BLUE);	}	//生成视图	@Override	protected void onDraw(Canvas canvas) {		int count = getLineCount();		Rect r = mRect;		Paint paint = mPaint;		//设置每一行的格式		for (int i = 0; i < count; i++) {			//取得每一行的基准Y坐标，并将每一行的界限值填写到r中			int baseline = getLineBounds(i, r);			//设置每一行的文字下带下划线			canvas.drawLine(r.left, baseline + 5, r.right, baseline + 5, paint);		}		super.onDraw(canvas);	}}

public class AddActivity extends Activity {	  private final Handler msgHandler = new Handler(){  	        public void handleMessage(Message msg) {  	                switch (msg.arg1) {  	                case 1:  	                        Toast.makeText(getApplicationContext(), msg.obj.toString(), Toast.LENGTH_SHORT).show();  	                        break;  	                default:  	                        break;  	                }  	        }  	    }; 	String a = "" ;	    	    	//标题、内容和时间	private EditText etName,etMain, etTime;	//保存按钮、取消按钮	private Button btnCommit,btnCancel;	//数据库操作类	private SQLiteDatabase sdb;	private ActivityManager am;	//年月日时分秒，用于保存日历详细信息	private int year, month, day, hours, minute, second;	private Calendar c;	private PendingIntent pi;	private AlarmManager alm;	//编辑模式标志	private boolean EDIT=false;	private String noteId;	//初始化函数	/** Called when the activity is first created. */	@Override	public void onCreate(Bundle savedInstanceState) {				super.onCreate(savedInstanceState);		setContentView(R.layout.add);				//将当前Activity添加到Activity列表中		am = ActivityManager.getInstance();		am.addActivity(this);		//初始化各个元素		etName = (EditText) findViewById(R.id.noteName);		etMain = (EditText) findViewById(R.id.noteMain);		btnCommit = (Button) findViewById(R.id.btnCommit);		btnCancel = (Button) findViewById(R.id.btnCancel);		etTime = (EditText) findViewById(R.id.noteTime);		Intent intent=getIntent();		noteId = intent.getStringExtra("noteId");		//如果noteId值不为空，则进入编辑模式，否则进入预览模式		if(noteId != null)			EDIT=true;		else			EDIT=false;		//数据库连接类		SqliteDBConnect sd = new SqliteDBConnect(AddActivity.this);		//获得数据库操作类		sdb = sd.getReadableDatabase();		if(EDIT)		{			//通过noteId取得对应的信息			Cursor c = sdb.query("note", new String[] { "noteId", "noteName",					"noteContent", "noteTime" }, "noteId=?",					new String[] { noteId }, null, null, null);			//将获得的信息写入对应的EditText			while (c.moveToNext()) {				etName.setText(c.getString(c.getColumnIndex("noteName")));				etMain.setText(c.getString(c.getColumnIndex("noteContent")));				etTime.setText(c.getString(c.getColumnIndex("noteTime")));			}			c.close();		}else{			//设置默认闹钟为当前时间			etTime.setText(am.returnTime());		}		//设置文本颜色为红色		etTime.setTextColor(Color.RED);		//为闹钟设置长按监听器，弹出日期选择界面		etTime.setOnLongClickListener(new OnLongClickListener() {			@Override			public boolean onLongClick(View v) {				//实例化日历				c = Calendar.getInstance();				//取得日历信息中的年月日时分秒				year = c.get(Calendar.YEAR);				month = c.get(Calendar.MONTH);				day = c.get(Calendar.DAY_OF_MONTH);				hours = c.get(Calendar.HOUR);				minute = c.get(Calendar.MINUTE);				second = c.get(Calendar.SECOND);				//新建一个日期选择控件				DatePickerDialog dpd = new DatePickerDialog(AddActivity.this,						new DatePickerDialog.OnDateSetListener() {							//设置日期的时候触发							@Override							public void onDateSet(DatePicker view, int y,									int monthOfYear, int dayOfMonth) {								String[] time = { "",										hours + ":" + minute + ":" + second };								try {									//将日期和时间分割									String[] time2 = etTime.getText()											.toString().trim().split(" ");									//取得时间的信息保存到time[1]中									if (time2.length == 2) {										time[1] = time2[1];									}								} catch (Exception e) {									// TODO Auto-generated catch block									e.printStackTrace();								}								String mo = "", da = "";								//将月份转换成两位数								if (monthOfYear < 9) {									mo = "0" + (monthOfYear + 1);								} else {									mo = monthOfYear+1 + "";								}								//将天数转换成两位数								if (dayOfMonth < 10) {									da = "0" + dayOfMonth;								} else {									da = dayOfMonth + "";								}								//将设置的结果保存到etTime中								etTime.setText(y + "-" + mo + "-" + da + " "										+ time[1]);							}						}, year, month, day);				dpd.setTitle("设置日期");				//显示日期控件				dpd.show();				return true;			}		});//		//设置单击监听器，弹出时间选择界面		etTime.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				//实例化日历				c = Calendar.getInstance();				//取得当前的年月日信息				year = c.get(Calendar.YEAR);				month = c.get(Calendar.MONTH);				day = c.get(Calendar.DAY_OF_MONTH);				//注意这里不是HOUR,HOUR返回的是12制的时间格式				hours = c.get(Calendar.HOUR_OF_DAY);				minute = c.get(Calendar.MINUTE);				second = c.get(Calendar.SECOND);				//新建时间选择器				TimePickerDialog tpd = new TimePickerDialog(AddActivity.this,						new OnTimeSetListener() {							@Override							public void onTimeSet(TimePicker view,									int hourOfDay, int minute) {								String[] time = {										year + "-" + month + "-" + day, "" };								try {									//分割时间和日期									time = etTime.getText().toString().trim()											.split(" ");								} catch (Exception e) {									// TODO Auto-generated catch block									e.printStackTrace();								}								String ho = "", mi = "";								//设置小时								if (hourOfDay < 10) {									ho = "0" + hourOfDay;								} else {									ho = hourOfDay + "";								}								//设置分钟								if (minute < 10) {									mi = "0" + minute;								} else {									mi = minute + "";								}								//将设置的结果保存到etTime中								etTime.setText(time[0] + " " + ho + ":" + mi);							}						}, hours, minute, true);				tpd.setTitle("设置时间");				//显示时间控件				tpd.show();			}		});//		//保存按钮监听器		btnCommit.setOnClickListener(new View.OnClickListener() {			@Override			public void onClick(View v) {				AlertDialog.Builder adb = new Builder(AddActivity.this);				//设置标题和信息				adb.setTitle("保存");				adb.setMessage("确定要保存吗？");				//设置按钮功能				adb.setPositiveButton("保存",						new DialogInterface.OnClickListener() {							@Override							public void onClick(DialogInterface dialog,									int which) {								//保存备忘录信息								saveNote();							}						});				adb.setNegativeButton("取消",						new DialogInterface.OnClickListener() {							@Override							public void onClick(DialogInterface dialog,									int which) {								Toast.makeText(AddActivity.this, "不保存",										Toast.LENGTH_SHORT).show();							}						});				//显示对话框				adb.show();			}		});		//设置取消按钮监听器		btnCancel.setOnClickListener(new View.OnClickListener() {			@Override			public void onClick(View v) {				AlertDialog.Builder adb = new Builder(AddActivity.this);				//设置标题和消息				adb.setTitle("提示");				adb.setMessage("确定不保存吗？");				//设置按键监听器				adb.setPositiveButton("确定",						new DialogInterface.OnClickListener() {							@Override							public void onClick(DialogInterface dialog,									int which) {								//进入主界面								Intent intent = new Intent();								intent.setClass(AddActivity.this,										MainActivity.class);								startActivity(intent);							}						});				adb.setNegativeButton("取消", null);				//显示对话框				adb.show();			}		});	}//	//新建菜单选项	@Override	public boolean onCreateOptionsMenu(Menu menu) {		menu.add(0, 1, 1, "关于");		menu.add(0, 2, 2, "设置闹铃");		menu.add(0, 3, 3, "退出");		return super.onCreateOptionsMenu(menu);	}	//为菜单选项绑定监听器	@Override	public boolean onMenuItemSelected(int featureId, MenuItem item) {		switch (item.getItemId()) {		//关于		case 1:			AlertDialog.Builder adb = new Builder(AddActivity.this);			adb.setTitle("关于");			adb.setMessage("备忘录V1.0");			adb.setPositiveButton("确定", null);			adb.show();			break;		//设置闹铃		case 2:			Intent intent = new Intent();			intent.setClass(AddActivity.this, SetAlarm.class);			startActivity(intent);			break;		//退出		case 3:			AlertDialog.Builder adb2 = new Builder(AddActivity.this);			adb2.setTitle("消息");			adb2.setMessage("真的要退出吗？");			adb2.setPositiveButton("确定", new DialogInterface.OnClickListener() {				@Override				public void onClick(DialogInterface dialog, int which) {					//关闭列表中的所有Activity					am.exitAllProgress();				}			});			adb2.setNegativeButton("取消", null);			//显示对话框			adb2.show();			break;		default:			break;		}		return super.onMenuItemSelected(featureId, item);	}	//按键判断	@Override	public boolean onKeyDown(int keyCode, KeyEvent event) {		//当按键是返回键时		if (keyCode == KeyEvent.KEYCODE_BACK) {			AlertDialog.Builder adb = new Builder(AddActivity.this);			adb.setTitle("消息");			adb.setMessage("是否要保存？");			adb.setPositiveButton("保存", new DialogInterface.OnClickListener() {				@Override				public void onClick(DialogInterface dialog, int which) {					//保存备忘录					saveNote();				}			});			adb.setNegativeButton("不保存", new DialogInterface.OnClickListener() {				@Override				public void onClick(DialogInterface dialog, int which) {					Intent intent2 = new Intent();					intent2.setClass(AddActivity.this, MainActivity.class);					//回到主页面					startActivity(intent2);				}			});			//显示对话框			adb.show();		}		return super.onKeyDown(keyCode, event);	}	//保存备忘录	public void saveNote() {		//取得输入的内容		String name = etName.getText().toString().trim();		String content = etMain.getText().toString().trim();		String time = etTime.getText().toString().trim();		//内容和标题都不能为空		if ("".equals(name) || "".equals(content)) {			Toast.makeText(this, "名称和内容都不能为空", Toast.LENGTH_SHORT)					.show();		} else {			if(EDIT)			{				am.saveNote(sdb, name, content, noteId, time);				Toast.makeText(this, "更新成功", Toast.LENGTH_SHORT)				.show();			}			else			{				am.addNote(sdb, name, content, time);				Toast.makeText(this, "添加成功", Toast.LENGTH_SHORT)					.show();			}			//分割日期和时间			String[] t = etTime.getText().toString().trim().split(" ");			//分割日期			String[] t1 = t[0].split("-");			//分割时间			String[] t2 = t[1].split(":");			//实例化日历			Calendar c2 = Calendar.getInstance();			//设置日历为闹钟的时间			c2.set(Integer.parseInt(t1[0]), Integer.parseInt(t1[1])-1,					Integer.parseInt(t1[2]), Integer.parseInt(t2[0]),					Integer.parseInt(t2[1]));						c=Calendar.getInstance();			//闹钟的时间应至少比现在多10s			if (c.getTimeInMillis() + 1000 * 10 <= c2.getTimeInMillis()) {				String messageContent;				//当内容字数大于20个字时，切掉一部分以‘...’代替，并存储在messageContent中				if (content.length() > 20) {					messageContent = content.substring(0, 18) + "...";				} else {					messageContent = content;				}				Intent intent = new Intent();				intent.setClass(this, AlarmNote.class);				//传递标题和内容信息				intent.putExtra("messageTitle", name);				intent.putExtra("messageContent", messageContent);				pi = PendingIntent.getBroadcast(this, 0, intent,						PendingIntent.FLAG_UPDATE_CURRENT);				//获得闹钟服务				alm = (AlarmManager) getSystemService(ALARM_SERVICE);				//设置闹钟				alm.set(AlarmManager.RTC_WAKEUP, c2.getTimeInMillis(), pi);			}			Intent intent2 = new Intent();			intent2.setClass(this, MainActivity.class);			//回到主目录			startActivity(intent2);			AddActivity.this.finish();		}	}	@Override	public void onDestroy()	{		super.onDestroy();		//关闭数据库连接		sdb.close();			}}

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