NotePad
This is an AndroidStudio rebuild of google SDK sample NotePad
一 功能扩展如下：
1.增加时间戳显示
2.添加笔记查询功能
3.界面UI美化
4.更改记事本的背景
二 主界面增加时间戳：
在 NoteEditor.java文件中的updateNote中添加
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式 values.put(NotePad.Notes.COLUMN_NAME_MODIFICATION_DATE, df.format(new Date()));
三、点击+,新建note界面，UI美化：
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<EditText
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_weight="1"
android:layout_marginLeft="10dp"
android:textColor="#000000"
android:id="@+id/et_Search"
android:hint="输入标题查找"
android:textCursorDrawable="@drawable/contact_edit_edittext_normal"
/>
<ImageView
android:layout_width="30dp"
android:layout_height="30dp"
android:background="@drawable/search1"
android:layout_marginRight="10dp"
android:layout_marginTop="5dp"
android:layout_marginLeft="10dp"
android:id="@+id/iv_searchnotes"
/>
</LinearLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_weight="1"
android:orientation="vertical"
android:layout_height="wrap_content">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:cacheColorHint="#00000000"
android:divider="#FFFFCC"
android:dividerHeight="0dp"
android:id="@id/android:list"
>
</ListView>
<ImageButton
android:id="@+id/fab"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="bottom|center"
android:layout_margin="45dp"
android:background="@drawable/tianjia"
android:backgroundTintMode="add"/>
四、更换主题界面：
public void ColorSelect(View view){
String color;
switch(view.getId()){
case R.id.pink:
Drawable btnDrawable1 = getResources().getDrawable(R.drawable.pink);
ll_noteList.setBackgroundDrawable(btnDrawable1);
lv_notesList.setBackgroundDrawable(btnDrawable1);
break;
case R.id.Yello:
Drawable btnDrawable2 = getResources().getDrawable(R.drawable.yellow);
ll_noteList.setBackgroundDrawable(btnDrawable2);
lv_notesList.setBackgroundDrawable(btnDrawable2);
break;
case R.id.PaleVioletRed:
Drawable btnDrawable3 = getResources().getDrawable(R.drawable.palevioletred);
ll_noteList.setBackgroundDrawable(btnDrawable3);
lv_notesList.setBackgroundDrawable(btnDrawable3);
break;
case R.id.LightGrey:
Drawable btnDrawable4 = getResources().getDrawable(R.drawable.lightgrey);
ll_noteList.setBackgroundDrawable(btnDrawable4);
lv_notesList.setBackgroundDrawable(btnDrawable4);
break;
case R.id.MediumPurple:
Drawable btnDrawable5 = getResources().getDrawable(R.drawable.mediumpurple);
ll_noteList.setBackgroundDrawable(btnDrawable5);
lv_notesList.setBackgroundDrawable(btnDrawable5);
break;
case R.id.DarkGray:
Drawable btnDrawable6 = getResources().getDrawable(R.drawable.darkgray);
ll_noteList.setBackgroundDrawable(btnDrawable6);
lv_notesList.setBackgroundDrawable(btnDrawable6);
break;
case R.id.Snow:
Drawable btnDrawable7 = getResources().getDrawable(R.drawable.snow);
ll_noteList.setBackgroundDrawable(btnDrawable7);
lv_notesList.setBackgroundDrawable(btnDrawable7);
break;
}
}
五、搜索笔记：
使用TextWatcher实现textview输入监听，使用数据库语句like实现模糊查找
private void addSearchView() {
//给listview添加头部(search)
View v=View.inflate(this, R.layout.notelistheader,null);
getListView().addHeaderView(v);
//给搜索框添加搜索功能
final EditText et_Search=(EditText)v.findViewById(R.id.et_search);
et_Search.addTextChangedListener(new TextWatcherForSearch(){
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
super.onTextChanged(charSequence, i, i1, i2);
if (charSequence.length()!=0 && et_Search.getText().toString().length()!=0){
String str_Search = et_Search.getText().toString();
Cursor search_cursor = managedQuery(
getIntent().getData(),
PROJECTION,
NotePad.Notes.COLUMN_NAME_TITLE+" like ?",
new String[]{"%"+str_Search+"%"}, //匹配字符串条件
NotePad.Notes.DEFAULT_SORT_ORDER // Use the default sort order.
);
adapter.swapCursor(search_cursor);//刷新listview
}else {
if (cursor!=null)//删除搜索框中的text后刷新listview
adapter.swapCursor(cursor);//刷新listview
}
}
});
}
```