该程序为i的每个值提供一个Htm值。我想通过反复按计算按钮依次显示每个值。我希望它显示i = 0的值，然后当我按下按钮时它变为i = 1并显示如此计算的值。 我知道我的问题有点模糊，但你的帮助将非常感激.. 此致
我的主要文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/main"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Optimum Tilt Angle Calculator"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Calculate" />
<TextView
android:id="@+id/beta"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Beta = "
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/rad"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="H = "
android:textAppearance="?android:attr/textAppearanceLarge" />
我的Tilt.java：
package com.ned.tilt;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Tilt extends Activity implements android.view.View.OnClickListener {
private static final double PI = 3.142;
private static final double PHI = 24.8508 * (PI / 180);
private static final double Gsc = 1367;
private static final double RO = 0.2;
int i, beta, ang;
double delta, ws, wss, Rb, Rb_num, Rb_den, Ra,
Htm, Ht;
double Hd[] = new double[12];
double Kt[] = new double[12];
double Gon[] = new double[12];
double Hom[] = new double[12];
int nbar[] = { 17, 47, 75, 105, 135, 162, 198, 228, 258, 288, 318, 344 };
int N[] = { 31, 28, 31, 30, 31, 30, 31, 30, 31, 30, 31, 30 };
double Hm[] = { 4.38, 5.18, 5.93, 6.65, 6.67, 6.40, 5.44, 5.27, 5.62, 5.24,
4.5, 4.11 };
Button cal;
TextView radiation, angle;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initialize();
cal.setOnClickListener(this);
}
private void initialize() {
// TODO Auto-generated method stub
cal = (Button) findViewById(R.id.button1);
radiation = (TextView) findViewById(R.id.rad);
angle = (TextView) findViewById(R.id.beta);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
for (i = 0; i <= 11; i++) {
Htm = 0;
delta = 23.45 * (Math.sin((0.986301369) * (PI / 180)
* (284 + (nbar[i]))));
ws = Math.acos(-(Math.tan(PHI)) * (Math.tan(delta * (PI / 180))));
ws = ws * (180 / PI);
Gon[i] = Gsc
* (1 + (0.033 * Math.cos(0.986301369 * (nbar[i])
* (PI / 180))));
Hom[i] = (86400 / PI)
* Gon[i]
* (((Math.cos(PHI)) * (Math.cos(delta * (PI / 180))) * (Math
.sin(ws * (PI / 180)))) + ((ws * (PI / 180)) * (Math
.sin(PHI) * (Math.sin(delta * (PI / 180))))));
Hom[i] = Hom[i] / 3600000;
Kt[i] = Hm[i] / Hom[i];
Hd[i] = (0.96268) - ((1.45200) * (Kt[i]))
+ ((0.27365) * (Kt[i]) * (Kt[i]))
+ ((0.04279) * (Kt[i]) * (Kt[i]) * (Kt[i]))
+ ((0.000246) * (ws))
+ ((0.001189) * (90 - (PHI * (180 / PI)) + delta));
Hd[i] = Hd[i] * Hm[i];
for (beta = 0; beta <= 90; beta++) {
wss = Math.acos(-(Math.tan((PHI) - (beta * (PI / 180))) * (Math
.tan(delta * (PI / 180)))));
wss = wss * (180 / PI);
if (wss > ws) {
wss = ws;
}
Rb_num = ((Math.cos((PHI) - (beta * (PI / 180))))
* (Math.cos(delta * (PI / 180))) * (Math.sin(wss
* (PI / 180))))
+ (((PI / 180) * wss)
* ((Math.sin((PHI) - (beta * (PI / 180))))) * ((Math
.sin(delta * (PI / 180)))));
Rb_den = ((Math.cos(PHI)) * (Math.cos(delta * (PI / 180))) * (Math
.sin(ws * (PI / 180))))
+ (((PI / 180) * (ws) * (Math.sin(PHI)) * (Math
.sin(delta * (PI / 180)))));
Rb = Rb_num / Rb_den;
Ra = ((1 - (Hd[i] / Hm[i])) * (Rb))
+ ((Hd[i] / (2 * Hm[i])) * (1 + (Math.cos(beta
* (PI / 180)))))
+ ((RO / 2) * (1 - (Math.cos(beta * (PI / 180)))));
Ht = Ra * Hm[i];
if (Ht > Htm) {
Htm = Ht;
ang = beta;
}
}
break;
}
radiation.setText("H = " + Htm);
angle.setText("Beta =" + ang);
}
}
答案 0 :(得分：1)
您想如何展示它们？只需将它们添加到TextView的字符串中即可？
textView.setText(someString);
TextView的ListView各自代表一个新的计算？
private List<String> mCalculations = new LinkedList<String>();
private Adapter mAdapter;
@Override
public onCreate(Bundle instance) {
mAdapter = new ArrayAdapter(getContext(), android.R.layout.simple_list_item_1, mCalculations);
((ListView) findViewById(R.id.my_list_view)).setAdapter(mAdapter);
}
@Override
public void onClick(View v) {
new AsyncTask<Void, Void, Double>() {
public Double doInBackground(Void... values) {
/* perform calculation */
return value;
}
public void onPostExecute(Double... values) {
if(values.length <= 0) return;
String text = String.valueOf(values[0]);
mCalculations.add(String.valueOf(value));
mAdapter.notifyDataSetChanged();
}
}.execute();
}
答案 1 :(得分：1)
只需删除当前循环，因为无论如何都要在一次迭代后调用break： <击>
<击>for (i = 0; i <= 11; i++) {
<击>
然后将i作为一个字段变量，并在每次按下按钮时递增它：
private int i = 0;
@Override
public void onClick(View v) {
// Do all your calculations and call setText() like above...
i++;
if(i == Hm.length) // Start over
i = 0;
}
（这假设每个数组都等于或大于Hm ......这很危险。你应该进行更彻底的检查。）
答案 2 :(得分：1)
据我所知，你不应该使用for循环
for (i = 0; i <= 11; i++)
删除此for循环，声明一个变量，并为其设置“i”，退出onClick时会增加变量。
private int counter=0;
public void onClick(View v) {
int i=counter;
//everything continues, just remove the for loop
angle.setText("Beta =" + ang);
counter++;
if(counter==12) counter=0;//your arrays are fixed, so we are turning back
}
答案 3 :(得分：0)
不要使用for循环，而是创建一个全局变量i，并在每次单击按钮
时增加它答案 4 :(得分：0)
在你的onClick下，你开始使用for循环
for (i = 0; i <= 11; i++) {
这是设置i每次单击按钮时都从零开始。然后在循环结束时使用break来打破循环。这使得这个循环无用，你不需要这个部分的循环。
在初始化函数中，您应该将i设置为零。然后在你的onClick函数中取出第一个for循环和你休息的地方，取出它并用i ++替换它。