开发随笔：界面推荐逻辑优化（文末小彩蛋）
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项目实战，小结项目开发中的得与失，项目优化工作，用到了以下几个知识点，在这里和大家分享一下：
进展-界面、推荐逻辑优化：
layout_margin、layout_height微调，对界面精雕细琢：
android:layout_margin="2dp"
双指针优化，不能直接赋值，否则游标联动，大坑：
Cursor cursor = db.query("Room", null, null, null, null, null,
"name,time");
Cursor cursorNext = db.query("Room", null, null, null, null, null,
"name,time");
suggest_btn_suggest = (Button) findViewById(R.id.suggest_btn_suggest);
suggest_btn_suggest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
SQLiteDatabase db = dbHelper.getWritableDatabase();
Cursor cursor = db.query("Room", null, null, null, null, null,
"name,time");
Cursor cursorNext = db.query("Room", null, null, null, null, null,
"name,time");
//public Cursor query (String table, String[] columns, String selection, String[] selectionArgs, String groupBy, String having, String orderBy)
if (cursor.moveToFirst() && cursorNext.moveToFirst()) {
do {
String local = cursor.getString(cursor
.getColumnIndex("local"));
String time = cursor.getString(cursor
.getColumnIndex("time"));
String name = cursor.getString(cursor.getColumnIndex("name"));
Log.d("权兴权意-Cursor", "name-" + name + " time-" + time + " local-" + local);
String localArray[] = local.split("-");
String timeArray[] = time.split("-");
// Log.d(TAG, name + "-localArray[0]:" + localArray[0] + ",mLou:" + mLou + ",localArray[1]" + localArray[1] + ",mCeng:" + mCeng);
if(localArray[0].equals(mLou) && localArray[1].equals(mCeng)){//楼层匹配
//1.会议室为空，无会议，直接预订；
if (time.equals("")){
roomName = name;
roomLocal = local;
break;
}else{
//2.会议室非空
mStartTime = FormatTime(mStartHour) + ":" + FormatTime(mStartMinute);//预订会议开始时间
mEndTime = FormatTime(mEndHour) + ":" + FormatTime(mEndMinute);//预订会议结束时间
// Log.d(TAG, "mStartTime:" + mStartTime + ",mEndTime:" + mEndTime);
// Log.d(TAG, "cursorNext.moveToPosition cursor.getPosition() + 1:" + cursorNext.moveToPosition(cursor.getPosition() + 1));
// Log.d(TAG, "cursorNext.getString(cursorNext.getColumnIndex(\\"name\\")):" + cursorNext.getString(cursorNext.getColumnIndex("name")));
// Log.d(TAG, "cursor.getString(cursor.getColumnIndex(\\"name\\")):" + cursor.getString(cursor.getColumnIndex("name")));
//2.1会议室只有一场会议
if(!cursorNext.moveToPosition(cursor.getPosition() + 1) || !cursorNext.getString(cursorNext.getColumnIndex("name")).equals(cursor.getString(cursor.getColumnIndex("name")))){
//预订会议结束时间早于原会议开始时间或者预订会议开始时间晚于原会议结束时间
Log.d(TAG, "timeArray[0]:" + timeArray[0] + "timeArray[1]:" + timeArray[1]);
if(mEndTime.compareTo(timeArray[0]) < 0 || mStartTime.compareTo(timeArray[1]) > 0){
roomName = name;
roomLocal = local;
//Log.d(TAG, "2.1会议室只有一场会议:" + roomName + roomLocal);
break;
}
}
//2.2.会议室有多场会议，遍历操作，区间：
//将会议室会议根据时间按降序排列A,B，取区间如图A-C-B，
//C的开始时间晚于A的结束时间，
//C的结束时间早于B的开始时间，
if(mStartTime.compareTo(timeArray[1]) > 0 && cursorNext.moveToPosition(cursor.getPosition() + 1)){
if(name.equals(cursorNext.getString(cursor.getColumnIndex("name")))){
String timeNext = cursorNext.getString(cursor
.getColumnIndex("time"));
String timeArrayNext[] = timeNext.split("-");
if(timeArrayNext[0].compareTo(mEndTime) > 0){
roomName = name;
roomLocal = local;
break;
}
}
}
}
}
// Log.d("权兴权意：", "nameCur-" + nameCur);
// Log.d("权兴权意：", "passwordCur-" + passwordCur);
// Log.d("权兴权意：", "idCur-" + idCur);
} while (cursor.moveToNext());
}
cursor.close();
db.close();
Intent intent = new Intent();
intent.setClass(SuggestActivity.this, RoomListActivity.class);
intent.putExtra("roomName",roomName);
intent.putExtra("roomLocal",roomLocal);
startActivity(intent);
}
});
AS插件，见文末小彩蛋。
属性动画，见另一篇博客。
小结：
进展-界面、推荐逻辑优化：
layout_margin、layout_height微调；
双指针优化，简化情况，Log调试；
AS插件，属性动画。
文末小彩蛋：
Android Studio安装插件的方式其实和Eclipse大同小异。废话不多说，直接上图：
区域1：你当前已经安装了的插件
区域2：在线安装
区域3：从硬盘安装，即针对你已经下载好了的插件，可通过这项选择到你下好的插件，进行安装。
还有一个Install JetBrains plugin其实和区域2是一样的，只是这边将JetBrains类型的插件放一起了，便于安装而已。
这边再讲下区域2，点击出现下图，可以直接在输入框中搜索你要安装的插件，然后点击右边的install按键即可。
比如我要安装Findbugs:
最后附上推荐模块核心源代码，欢迎交流：
package com.quan.car.qmeeting;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.TimePicker;
import utils.MyDatabaseHelper;
/**
* Created by 权兴权意 on 2016/8/23.
*/
public class SuggestActivity extends Activity{
private TimePicker startTime_tp_suggest;
private TimePicker endTime_tp_suggest;
private TextView time_tv_suggest;
private Button yesTime_btn_suggest;
private int mStartHour;
private int mStartMinute;
private int mEndHour;
private int mEndMinute;
private String mStartTime;
private String mEndTime;
private RadioGroup lou_rg_suggest;
private RadioGroup ceng_rg_suggest;
private TextView floor_tv_suggest;
private Button yesFloor_btn_suggest;
private String mLou;
private String mCeng;
private Button suggest_btn_suggest;
private MyDatabaseHelper dbHelper;
private String roomName;
private String roomLocal;
private static final String TAG = "SuggestActivity";
// private static final String TAG = "SuggestActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.suggest);
// Log.d(TAG, "onCreate: ");
// Log.d(TAG, "onCreate() called with: " + "savedInstanceState = [" + savedInstanceState + "]");
// Intent i = getIntent();
// roomName = i.getStringExtra("roomName");
// roomLocal = i.getStringExtra("roomLocal");
dbHelper = new MyDatabaseHelper(this, "Meeting.db", null, MyDatabaseHelper.DB_VERSION);
time_tv_suggest = (TextView) findViewById(R.id.time_tv_suggest);
startTime_tp_suggest = (TimePicker) findViewById(R.id.startTime_tp_suggest);
startTime_tp_suggest.setIs24HourView(true);
startTime_tp_suggest.setCurrentHour(startTime_tp_suggest.getCurrentHour());
startTime_tp_suggest.setCurrentMinute(startTime_tp_suggest.getCurrentMinute());
startTime_tp_suggest.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {
@Override
public void onTimeChanged(TimePicker view, int hour, int minute) {
mStartHour = hour;
mStartMinute = minute;
}
});
endTime_tp_suggest = (TimePicker) findViewById(R.id.endTime_tp_suggest);
endTime_tp_suggest.setIs24HourView(true);
endTime_tp_suggest.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {
@Override
public void onTimeChanged(TimePicker view, int hour, int minute) {
mEndHour = hour;
mEndMinute = minute;
}
});
yesTime_btn_suggest = (Button) findViewById(R.id.yesTime_btn_suggest);
yesTime_btn_suggest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
time_tv_suggest.setText(new StringBuffer().append(" ").append(FormatTime(mStartHour))
.append(":").append(FormatTime(mStartMinute))
.append("-").append(FormatTime(mEndHour))
.append(":").append(FormatTime(mEndMinute)));
}
});
floor_tv_suggest = (TextView) findViewById(R.id.floor_tv_suggest);
lou_rg_suggest = (RadioGroup) findViewById(R.id.lou_rg_suggest);
lou_rg_suggest.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int id) {
switch (id){
case R.id.e11_rb_suggest:
//Toast.makeText(SuggestActivity.this, "E11", Toast.LENGTH_SHORT).show();
mLou = "E11";
break;
case R.id.e13_rb_suggest:
//Toast.makeText(SuggestActivity.this, "E13", Toast.LENGTH_SHORT).show();
mLou = "E13";
break;
default:
break;
}
}
});
ceng_rg_suggest = (RadioGroup) findViewById(R.id.ceng_rg_suggest);
ceng_rg_suggest.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int id) {
switch (id){
case R.id.ceng1_rb_suggest:
//Toast.makeText(SuggestActivity.this, "1", Toast.LENGTH_SHORT).show();
mCeng = "1";
break;
case R.id.ceng2_rb_suggest:
//Toast.makeText(SuggestActivity.this, "2", Toast.LENGTH_SHORT).show();
mCeng = "2";
break;
case R.id.ceng3_rb_suggest:
//Toast.makeText(SuggestActivity.this, "3", Toast.LENGTH_SHORT).show();
mCeng = "3";
break;
case R.id.ceng4_rb_suggest:
//Toast.makeText(SuggestActivity.this, "4", Toast.LENGTH_SHORT).show();
mCeng = "4";
break;
case R.id.ceng5_rb_suggest:
//Toast.makeText(SuggestActivity.this, "5", Toast.LENGTH_SHORT).show();
mCeng = "5";
break;
default:
break;
}
}
});
yesFloor_btn_suggest = (Button) findViewById(R.id.yesFloor_btn_suggest);
yesFloor_btn_suggest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
floor_tv_suggest.setText(new StringBuffer().append(" ").append((mLou))
.append("-").append(mCeng));
//roomLocal = mLou + "-" + mCeng;
}
});
suggest_btn_suggest = (Button) findViewById(R.id.suggest_btn_suggest);
suggest_btn_suggest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
SQLiteDatabase db = dbHelper.getWritableDatabase();
Cursor cursor = db.query("Room", null, null, null, null, null,
"name,time");
Cursor cursorNext = db.query("Room", null, null, null, null, null,
"name,time");
//public Cursor query (String table, String[] columns, String selection, String[] selectionArgs, String groupBy, String having, String orderBy)
if (cursor.moveToFirst() && cursorNext.moveToFirst()) {
do {
String local = cursor.getString(cursor
.getColumnIndex("local"));
String time = cursor.getString(cursor
.getColumnIndex("time"));
String name = cursor.getString(cursor.getColumnIndex("name"));
Log.d("权兴权意-Cursor", "name-" + name + " time-" + time + " local-" + local);
String localArray[] = local.split("-");
String timeArray[] = time.split("-");
// Log.d(TAG, name + "-localArray[0]:" + localArray[0] + ",mLou:" + mLou + ",localArray[1]" + localArray[1] + ",mCeng:" + mCeng);
if(localArray[0].equals(mLou) && localArray[1].equals(mCeng)){//楼层匹配
//1.会议室为空，无会议，直接预订；
if (time.equals("")){
roomName = name;
roomLocal = local;
break;
}else{
//2.会议室非空
mStartTime = FormatTime(mStartHour) + ":" + FormatTime(mStartMinute);//预订会议开始时间
mEndTime = FormatTime(mEndHour) + ":" + FormatTime(mEndMinute);//预订会议结束时间
// Log.d(TAG, "mStartTime:" + mStartTime + ",mEndTime:" + mEndTime);
// Log.d(TAG, "cursorNext.moveToPosition cursor.getPosition() + 1:" + cursorNext.moveToPosition(cursor.getPosition() + 1));
// Log.d(TAG, "cursorNext.getString(cursorNext.getColumnIndex(\\"name\\")):" + cursorNext.getString(cursorNext.getColumnIndex("name")));
// Log.d(TAG, "cursor.getString(cursor.getColumnIndex(\\"name\\")):" + cursor.getString(cursor.getColumnIndex("name")));
//2.1会议室只有一场会议
if(!cursorNext.moveToPosition(cursor.getPosition() + 1) || !cursorNext.getString(cursorNext.getColumnIndex("name")).equals(cursor.getString(cursor.getColumnIndex("name")))){
//预订会议结束时间早于原会议开始时间或者预订会议开始时间晚于原会议结束时间
Log.d(TAG, "timeArray[0]:" + timeArray[0] + "timeArray[1]:" + timeArray[1]);
if(mEndTime.compareTo(timeArray[0]) < 0 || mStartTime.compareTo(timeArray[1]) > 0){
roomName = name;
roomLocal = local;
//Log.d(TAG, "2.1会议室只有一场会议:" + roomName + roomLocal);
break;
}
}
//2.2.会议室有多场会议，遍历操作，区间：
//将会议室会议根据时间按降序排列A,B，取区间如图A-C-B，
//C的开始时间晚于A的结束时间，
//C的结束时间早于B的开始时间，
if(mStartTime.compareTo(timeArray[1]) > 0 && cursorNext.moveToPosition(cursor.getPosition() + 1)){
if(name.equals(cursorNext.getString(cursor.getColumnIndex("name")))){
String timeNext = cursorNext.getString(cursor
.getColumnIndex("time"));
String timeArrayNext[] = timeNext.split("-");
if(timeArrayNext[0].compareTo(mEndTime) > 0){
roomName = name;
roomLocal = local;
break;
}
}
}
}
}
// Log.d("权兴权意：", "nameCur-" + nameCur);
// Log.d("权兴权意：", "passwordCur-" + passwordCur);
// Log.d("权兴权意：", "idCur-" + idCur);
} while (cursor.moveToNext());
}
cursor.close();
db.close();
Intent intent = new Intent();
intent.setClass(SuggestActivity.this, RoomListActivity.class);
intent.putExtra("roomName",roomName);
intent.putExtra("roomLocal",roomLocal);
startActivity(intent);
}
});
// Toast.makeText(SuggestActivity.this, "SuggestActivity--" + mHour + ":" + mMinute,
// Toast.LENGTH_SHORT).show();
}
private String FormatTime(int time){
String s = Integer.toString(time);
if(s.length() == 1){
s = "0" + s;
}
return s;
}
}
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