基于Android的太阳方位角计算工具

这个是我今年参加谷歌安卓大赛的作品，结果连我的名字都没有，伤心啊。不过我已经决定在Android上狠下功夫的，这可是个好东西。

先看我的截屏吧。

还有个城市选择界面：

下面是代码了，除了计算公式是找来的外，其他全部都是原创，那可是我的十一八天长假的劳动成果啊。

package lineter.works.sunangle;import java.util.Calendar;public class city {private double weidu, jingdu;private double pianjiao, yangjiao;public boolean weidu_cuowu = false;public boolean jingdu_cuowu = false;public city(double weidu, double jingdu) {if (weidu <= 90.0 && weidu >= -90.0 ){this.weidu = weidu;}else{weidu_cuowu=true;}if(jingdu <= 180.0&& jingdu > -180.0) {this.jingdu = jingdu;}else{jingdu_cuowu=true;}if(!weidu_cuowu && !jingdu_cuowu){this.jisuan();} else {this.pianjiao = 0.0;this.yangjiao = 0.0;}}public String getpianjiao() {String temp1, temp2, temp3;temp1 = String.valueOf((int) (this.pianjiao));temp2 = String.valueOf(Math.abs((int) ((this.pianjiao - (double) (int) (this.pianjiao)) * 60)));if (Integer.parseInt(temp2) < 10)temp2 = "0" + temp2;temp3 = String.valueOf(Math.abs((int) (((this.pianjiao - (double) (int) (this.pianjiao)) * 60 - (double) (int) ((this.pianjiao - (double) (int) (this.pianjiao)) * 60)) * 60)));if (Integer.parseInt(temp3) < 10)temp3 = "0" + temp3;return String.valueOf(temp1 + "°" + temp2 + "'" + temp3 + "\"");}public String getyangjiao() {String temp1, temp2, temp3;temp1 = String.valueOf((int) (this.yangjiao));temp2 = String.valueOf(Math.abs((int) ((this.yangjiao - (double) (int) (this.yangjiao)) * 60)));if (Integer.parseInt(temp2) < 10)temp2 = "0" + temp2;temp3 = String.valueOf(Math.abs((int) (((this.yangjiao - (double) (int) (this.yangjiao)) * 60 - (double) (int) ((this.yangjiao - (double) (int) (this.yangjiao)) * 60)) * 60)));if (Integer.parseInt(temp3) < 10)temp3 = "0" + temp3;return String.valueOf(temp1 + "°" + temp2 + "'" + temp3 + "\"");}private void jisuan() {double temp1, temp2, temp3, temp4, temp5, temp6;double chiwei, shicha;Calendar d = Calendar.getInstance();temp1 = (double) d.get(Calendar.DAY_OF_YEAR);temp2 = 79.6764 + 0.2422 * ((double) d.get(Calendar.YEAR) - 1985)- (double) ((d.get(Calendar.YEAR) - 1985) / 4);temp3 = 2 * Math.PI * (temp1 - temp2) / (365.2422);chiwei = 0.3723 + 23.2567 * Math.sin(temp3) + 0.1149* Math.sin(2 * temp3) - 0.1712 * Math.sin(3 * temp3) - 0.758* Math.cos(temp3) + 0.3656 * Math.cos(2 * temp3) + 0.0201* Math.cos(3 * temp3);shicha = 0.0028 - 1.9857 * Math.sin(temp3) + 9.9059* Math.sin(2 * temp3) - 7.0924 * Math.cos(temp3) - 0.6882* Math.cos(2 * temp3);temp4 = (double) d.get(Calendar.HOUR_OF_DAY)+ ((double) d.get(Calendar.MINUTE)) / 60+ ((double) d.get(Calendar.SECOND)) / 3600;temp4 = temp4 + (this.jingdu - 120.0) * 4 / 60 + shicha / 60;temp5 = Math.sin(this.weidu * Math.PI / 180)* Math.sin(chiwei * Math.PI / 180)+ Math.cos(this.weidu * Math.PI / 180)* Math.cos(chiwei * Math.PI / 180)* Math.cos((temp4 - 12) * 15 * Math.PI / 180);yangjiao = Math.asin(temp5) * 180 / Math.PI;temp6 = (Math.sin(yangjiao * Math.PI / 180)* Math.sin(this.weidu * Math.PI / 180) - Math.sin(chiwei* Math.PI / 180))/ (Math.cos(yangjiao * Math.PI / 180) * Math.cos(this.weidu* Math.PI / 180));pianjiao = Math.acos(temp6) * 180 / Math.PI;if (temp4 < 12.0) {pianjiao = -pianjiao;}}}

这个是主程序了，

sunangle.java:

package lineter.works.sunangle;import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;public class sunangle extends Activity {public static final String ALL_DATE="POSITION";private EditText etweidu, etjingdu;private Button bcalc, bhelp, bquit;private TextView tvpianjiao, tvyangjiao;final Handler handler = new Handler();private List<String> list=new ArrayList<String>();private ArrayAdapter<String> adapter;private Spinner sp;private Boolean firstchoice=true;private int citychoic;private String[] city_name={"北京","天津","石家庄","保定","唐山","秦皇岛","张家口","承德","太原","大同","临汾","长治", //12"呼和浩特","包头","海拉尔","沈阳","大连","鞍山","锦州","长春","吉林","哈尔滨","齐齐哈尔","牡丹江","上海",  //13"南京","无锡","苏州","徐州","杭州","宁波","温州","金华","合肥","芜湖","安庆","福州","厦门", "泉州","南昌",  //15"九江","赣州","济南","烟台","青岛","郑州","开封","洛阳","许昌","新乡","武汉","宜昌","沙市","长沙","衡阳",   //15"湘潭","常德","广州","汕头","韶关","海口","南宁","桂林","柳州","悟州","成都","重庆","内江","泸州","万县",   //15"贵阳","遵义","昆明","拉萨","日喀则","西安","宝鸡","延安","兰州","天水","酒泉","西宁","银川","乌鲁木齐",   //14"哈密","喀什","和田","台北"};                                                                           //4private double[] city_longitude={116.467,117.167,114.600,115.467,118.150,119.617,114.917,117.867,112.550,113.217,111.217,113.217,   //12111.633,110.000,119.717,123.383,121.633,123.000,121.150,125.300,126.600,126.633,123.917,129.600,121.433,                        //13118.767,120.300,120.650,117.200,120.167,121.567,120.633,119.817,117.267,118.333,117.033,119.317,118.067,118.617,115.883,        //15115.983,114.933,117.033,121.333,120.317,113.700,114.383,112.433,113.800,113.900,114.333,111.250,112.283,112.917,112.567,        //15112.850,111.650,113.300,116.667,113.550,110.167,108.350,110.167,109.317,111.300,104.067,106.550,105.050,105.450,108.367,        //15106.717,106.883,102.700,91.033,88.817,108.917,107.150,109.433,103.833,105.550,98.500,101.817,106.216,87.600,                    //1493.450,75.983,79.917,121.517};                                                                                              //4private double[] city_dimensionality={39.900,39.167,38.050,38.883,39.617,39.900,40.850,40.983,37.850,40.117,36.083,36.083,      //1240.800,40.583,49.233,41.800,38.900,41.067,41.150,43.917,43.800,45.750,47.367,44.583,31.200,                             //1332.050,31.583,31.333,34.267,30.250,29.883,28.000,29.167,31.850,31.350,30.533,26.033,24.433,24.900,28.683,               //1529.717,25.850,36.667,37.550,36.067,34.733,34.867,34.717,34.000,35.300,30.617,30.700,30.267,28.200,26.917,               //1527.900,29.000,23.167,23.350,24.800,20.050,22.783,25.300,24.333,23.467,30.650,29.550,29.583,28.900,30.800,               //1526.567,27.750,25.050,29.650,29.267,34.250,34.350,36.583,36.050,34.583,39.733,36.617,38.467,43.767,                      //1442.833,39.450,37.117,25.033};                                                                                           //4/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setTitle("太阳角度计算工具");setContentView(R.layout.main);etweidu = (EditText) findViewById(R.id.weidu);etjingdu = (EditText) findViewById(R.id.jingdu);bcalc = (Button) findViewById(R.id.bcalc);bcalc.setOnClickListener(new ClickListener());bhelp = (Button) findViewById(R.id.bhelp);bhelp.setOnClickListener(new ClickListener());bquit = (Button) findViewById(R.id.bquit);bquit.setOnClickListener(new ClickListener());tvpianjiao = (TextView) findViewById(R.id.pianjiao);tvyangjiao = (TextView) findViewById(R.id.yangjiao);handler.postDelayed(runnable, 1000);int tmp;for (tmp=0;tmp<city_name.length;tmp++){list.add(city_name[tmp].toString());}sp = (Spinner) findViewById(R.layout.myspinner);adapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,list);adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);sp.setAdapter(adapter);sp.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){@Overridepublic void onItemSelected(AdapterView<?> arg0, View arg1,int arg2, long arg3) {// TODO Auto-generated method stubif(firstchoice){firstchoice=false;}else{etjingdu.setText(String.valueOf( city_longitude[arg2]));etweidu.setText(String.valueOf( city_dimensionality[arg2]));citychoic=arg2;}arg0.setVisibility(View.VISIBLE);}@Overridepublic void onNothingSelected(AdapterView<?> arg0) {// TODO Auto-generated method stub}});SharedPreferences position1=getSharedPreferences(ALL_DATE,0);String lastWeidu=position1.getString("LAST_WEIDU", "38.497");String lastJingdu=position1.getString("LAST_JINGDU", "106.133");citychoic=position1.getInt("CITYCHOIC", 0);etweidu.setText(lastWeidu.toString());etjingdu.setText(lastJingdu.toString());sp.setSelection(citychoic);}@Overrideprotected void onStop() {// TODO Auto-generated method stubsuper.onStop();SharedPreferences.Editor sharedata = getSharedPreferences(ALL_DATE, 0).edit(); sharedata.putString("LAST_WEIDU",etweidu.getText().toString());  sharedata.putString("LAST_JINGDU",etjingdu.getText().toString()); sharedata.putInt("CITYCHOIC", citychoic); sharedata.commit();}@Overrideprotected void onDestroy() {// TODO Auto-generated method stubsuper.onDestroy();handler.removeCallbacks(runnable);}class ClickListener implements View.OnClickListener {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubif (arg0 == bcalc) {city ct = new city(Double.parseDouble(etweidu.getText().toString()), Double.parseDouble(etjingdu.getText().toString()));tvpianjiao.setText(ct.getpianjiao());tvyangjiao.setText(ct.getyangjiao());} else if (arg0 == bhelp) {new AlertDialog.Builder(sunangle.this).setTitle("使用帮助").setMessage("请选择城市或输入当地经纬度计算当前时刻太阳角度。\n"+ "说明:\n  “偏角”以正南方向为0度，东负西正。\n"+ "  “仰角”以地平面为0度,上正下负。".toString()).show();} else if (arg0 == bquit) {finish();}}}Runnable runnable = new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubtry {double tmp1, tmp2;if (etweidu.getText().toString() != ""&& etjingdu.getText().toString() != "") {tmp1 = Double.parseDouble(etweidu.getText().toString());tmp2 = Double.parseDouble(etjingdu.getText().toString());city ct = new city(tmp1, tmp2);tvpianjiao.setText(ct.getpianjiao());tvyangjiao.setText(ct.getyangjiao());if (ct.weidu_cuowu) {tvpianjiao.setText("维度输入错误");}if(ct.jingdu_cuowu){tvyangjiao.setText("经度输入错误");}handler.postDelayed(this, 1000);}} catch (Exception e) {handler.postDelayed(runnable, 1000);}}};
}

看看代码就知道我是怎么费了九牛二虎之力才做出来的了吧，唉，重在参与吧。

不好意思，少上传个布局文件。

main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="fill_parent" android:background="@drawable/taiyang" ><TableLayout android:layout_width="fill_parent"android:stretchColumns="0,1"android:layout_height="fill_parent"android:padding="10dp"><TableRow><TextViewandroid:text="请选择城市"android:textSize="18dp" /><Spinner android:id="@+layout/myspinner" android:layout_width="wrap_content"android:layout_height="wrap_content"/></TableRow><TableRow><TextViewandroid:text="当地维度(°)"android:textSize="18dp" /><EditText android:id="@+id/weidu"android:text="38.16" android:numeric="decimal"/></TableRow><TableRow><TextView android:text="当地经度(°)"android:textSize="18dp" /><EditText android:id="@+id/jingdu"android:text="106.1" android:numeric="decimal"/></TableRow><TableRow><TextViewandroid:text="太阳偏角"android:textSize="18dp"/><TextViewandroid:id="@+id/pianjiao"android:text="0.0"android:textSize="18dp"android:textColor="#4754f8"/></TableRow><TableRow><TextViewandroid:text="太阳仰角"android:textSize="18dp"/><TextViewandroid:id="@+id/yangjiao"android:text="0.0"android:textSize="18dp"android:textColor="#4754f8"/></TableRow><TableRow><TextViewandroid:text="当前时间"android:textSize="22dp"/><DigitalClock android:text="DigitalClock" android:id="@+id/digitalClock1" android:layout_width="wrap_content" android:layout_height="wrap_content"android:textSize="22dp"android:textColor="#0ff"/></TableRow><TableRow><Buttonandroid:id="@+id/bhelp"android:text="帮助"android:layout_width="wrap_content" /><Buttonandroid:id="@+id/bquit"android:text="退出系统"android:layout_width="wrap_content" /></TableRow><Button android:id="@+id/bcalc"android:text="计算角度"android:layout_width="wrap_content" android:visibility="invisible"/></TableLayout>
</LinearLayout>

字符串文件

string.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources><string name="hello">Hello World, sunangle!</string><string name="app_name">sunangle</string><string name="helpmsg">使用帮助。</string>
</resources>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="lineter.works.sunangle" android:versionCode="1"android:versionName="1.0"><uses-sdk android:minSdkVersion="4" /><application android:icon="@drawable/sunangle"android:label="@string/app_name" android:launchMode="singleInstance"><activity android:name=".sunangle" android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application>
</manifest>

其实也没什么权限，它也不需要什么权限，只是有个单例运行设置，在第八行，注意下就行了。

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