我的apk给了我两个错误，从今天早上26点开始，但我似乎没有掌握解决方案。第一个问题是有一个很好的方法/技巧来跟踪开放和关闭的parens以及开放和封闭的括号吗？第二个问题我的代码是否存在根本性问题？第一个错误是在私人Button btnExecute;我想我错过了一个封闭的支架，有些地方但不知道在哪里..当昨晚工作时我没有靠近那条线的封闭支架 第二个错误是关闭括号两行从结束onClick。我有一种感觉，它缺少一个分号，paren或支架。 目标是读取微调器中显示的值并使用if语句来确定要运行的例程。在每个例程中，我将检查某些EditText是否为空或空白，如果不是空白则是基于微调器条目的特定公式。
package com.androidbook.triviaquiz8;
import android.app.AlertDialog;
import android.os.Bundle;
import android.os.Environment;
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.SpinnerAdapter;
public class QuizHelpActivity extends QuizActivity {
private EditText m1_sqs1;
private EditText m1_rs1;
private EditText m1_rs2;
private EditText m1_cd;
private EditText m1_els1;
private EditText m1_els2;
private EditText m1_sqs1_eng;
private EditText m1_rs1_eng;
private EditText m1_rs2_eng;
private EditText m1_cd_eng;
private EditText m1_els1_eng;
private EditText m1_els2_eng;
private EditText m1_sqs1_met;
private EditText m1_rs1_met;
private EditText m1_rs2_met;
private EditText m1_cd_met;
private EditText m1_els1_met;
private EditText m1_els2_met;
private EditText m1_sa_in;
private EditText m1_sa_ft;
private EditText m1_sa_mm;
private EditText m1_sa_m;
private EditText m1_ed_in;
private EditText m1_ed_ft;
private EditText m1_ed_mm;
private EditText m1_ed_m;
private Spinner m1_ss_spinner;
private Spinner m1_sqs1_spinner;
private Spinner m1_rs1_spinner;
private Spinner m1_rs2_spinner;
private Spinner m1_cd_spinner;
private Spinner m1_els1_spinner;
private Spinner m1_els2_spinner;
private QuizHelpActivity mContext;
private Button btnSave;
private Button btnClear;
private Button btnExecute;
//
// onCreate - let the fun begin!
//
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
mContext = this;
setContentView(R.layout.help);
m1_sqs1 = (EditText) findViewById(R.id.m1_sqs1);
m1_rs1 = (EditText) findViewById(R.id.m1_rs1);
m1_rs2 = (EditText) findViewById(R.id.m1_rs2);
m1_cd = (EditText) findViewById(R.id.m1_cd);
m1_els1 = (EditText) findViewById(R.id.m1_els1);
m1_els2 = (EditText) findViewById(R.id.m1_els2);
m1_sqs1_eng = (EditText) findViewById(R.id.m1_sqs1);
m1_rs1_eng = (EditText) findViewById(R.id.m1_rs1);
m1_rs2_eng = (EditText) findViewById(R.id.m1_rs2);
m1_cd_eng = (EditText) findViewById(R.id.m1_cd);
m1_els1_eng = (EditText) findViewById(R.id.m1_els1);
m1_els2_eng = (EditText) findViewById(R.id.m1_els2);
m1_sqs1_met = (EditText) findViewById(R.id.m1_sqs1);
m1_rs1_met = (EditText) findViewById(R.id.m1_rs1);
m1_rs2_met = (EditText) findViewById(R.id.m1_rs2);
m1_cd_met = (EditText) findViewById(R.id.m1_cd);
m1_els1_met = (EditText) findViewById(R.id.m1_els1);
m1_els2_met = (EditText) findViewById(R.id.m1_els2);
m1_sa_in = (EditText) findViewById(R.id.m1_sa_in);
m1_sa_ft = (EditText) findViewById(R.id.m1_sa_ft);
m1_sa_mm = (EditText) findViewById(R.id.m1_sa_mm);
m1_sa_m = (EditText) findViewById(R.id.m1_sa_m);
m1_ed_in = (EditText) findViewById(R.id.m1_ed_in);
m1_ed_ft = (EditText) findViewById(R.id.m1_ed_ft);
m1_ed_mm = (EditText) findViewById(R.id.m1_ed_mm);
m1_ed_m = (EditText) findViewById(R.id.m1_ed_m);
//
// Create an OnClick Event in each button.
//
Button btnExecute = (Button) findViewById(R.id.btnExecute);
Button btnSave = (Button) findViewById(R.id.btnSave);
Button btnClear = (Button) findViewById(R.id.btnClear);
btnSave.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
}
});
btnClear.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
}
});
btnExecute.setOnClickListener(new View.OnClickListener() {
private AlertDialog show;
public void onClick(View arg0) {
AdapterView<SpinnerAdapter> m1ssspinner;
if (((m1ssspinner.getSelectedItem() == "Square"))) {
if ((m1_sqs1.getText().length() == 0)
|| (m1_sqs1.getText().toString() == " ")) {
show = new AlertDialog.Builder(mContext).setTitle("Error")
.setMessage("The Square Side length is empty")
.setPositiveButton("OK", null).show();
} else {
double result = new Double(m1_sqs1.getText().toString()) * new Double(m1_sqs1.getText().toString());
m1_sa_in.setText(Double.toString(result));
}
if (((m1ssspinner.getSelectedItem() == "Rectangle"))) {
if ((m1_rs1.getText().length() == 0)
|| (m1_rs1.getText().toString() == " ")
|| (m1_rs1.getText().toString() == " ")
|| (m1_rs1.getText().length() == 0)){
show = new AlertDialog.Builder(mContext).setTitle("Error")
.setMessage("A Rectangle Side length is empty")
.setPositiveButton("OK", null).show();
} else {
double result = new Double(m1_rs1.getText().toString()) * new Double(m1_rs2.getText().toString());
m1_sa_in.setText(Double.toString(result));
}
if (((m1ssspinner.getSelectedItem() == "Circle"))) {
if ((m1_cd.getText().length() == 0)
|| (m1_cd.getText().toString() == " ")
|| (m1_cd.getText().toString() == " ")){
show = new AlertDialog.Builder(mContext).setTitle("Error")
.setMessage("The Circle Diameter is empty")
.setPositiveButton("OK", null).show();
} else {
double result = new Double(m1_cd.getText().toString()) * new Double(m1_cd.getText().toString());
m1_sa_in.setText(Double.toString(result));
}
if (((m1ssspinner.getSelectedItem() == "Elliptical"))) {
if ((m1_els1.getText().length() == 0)
|| (m1_els1.getText().toString() == " ")
|| (m1_els2.getText().toString() == 0)
|| (m1_els2.getText().toString() == " ")){
show = new AlertDialog.Builder(mContext).setTitle("Error")
.setMessage("An Elliptical Diameter is empty")
.setPositiveButton("OK", null).show();
} else {
double result = new Double(m1_els1.getText().toString()) * new Double(m1_els2.getText().toString());
m1_sa_in.setText(Double.toString(result));
}
);
//
// End OnClick Event in each button.
//
//
// check media availability
//
boolean mExternalStorageAvailable = false;
boolean mExternalStorageWriteable = false;
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
// We can read and write the media
mExternalStorageAvailable = mExternalStorageWriteable = true;
} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
// We can only read the media
mExternalStorageAvailable = true;
mExternalStorageWriteable = false;} else {
// Something else is wrong. It may be one of many other states, but all we need
// to know is we can neither read nor write
mExternalStorageAvailable = mExternalStorageWriteable = false;
}
//
// end check media availability
//
//
// create METHOD 1 STACK SHAPE SPINNER (m1_ss_spinner) with displayed text 'centered'
//
Spinner m1ssspinner = (Spinner)findViewById(R.id.m1_ss_spinner);
ArrayAdapter<CharSequence> m1ssadapter = ArrayAdapter.createFromResource(this, R.array.m1_ss_list, R.layout.my_normal_spinner_style);
m1ssadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
m1ssspinner.setAdapter(m1ssadapter);
//
// get METHOD 1 STACK SHAPE UNIT (m1_ss_unit)
//
Object m1_ss_unit = (m1ssspinner.getSelectedItem());
//
// create METHOD 1 SQUARE_SIDE1 SPINNER (m1_sqs1_spinner) with displayed text 'centered'
//
Spinner m1sqs1spinner = (Spinner)findViewById(R.id.m1_sqs1_spinner);
ArrayAdapter<CharSequence> m1sqs1adapter = ArrayAdapter.createFromResource(this, R.array.m1_sqs1_list, R.layout.my_normal_spinner_style);
m1sqs1adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
m1sqs1spinner.setAdapter(m1sqs1adapter);
//
// create METHOD 1 RECTANGLE_SIDE1 SPINNER (m1_rs1_spinner) with displayed text 'centered'
//
Spinner m1rs1spinner = (Spinner)findViewById(R.id.m1_rs1_spinner);
ArrayAdapter<CharSequence> m1rs1adapter = ArrayAdapter.createFromResource(this, R.array.m1_rs1_list, R.layout.my_normal_spinner_style);
m1rs1adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
m1rs1spinner.setAdapter(m1rs1adapter);
//
// create METHOD 1 RECTANGLE_SIDE2 SPINNER (m1_rs2_spinner) with displayed text 'centered'
//
Spinner m1rs2spinner = (Spinner)findViewById(R.id.m1_rs2_spinner);
ArrayAdapter<CharSequence> m1rs2adapter = ArrayAdapter.createFromResource(this, R.array.m1_rs2_list, R.layout.my_normal_spinner_style);
m1rs2adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
m1rs2spinner.setAdapter(m1rs2adapter);
//
// create METHOD 1 CIRCULAR DIAMETER SPINNER (m1_cd_spinner) with displayed text 'centered'
//
Spinner m1cdspinner = (Spinner)findViewById(R.id.m1_cd_spinner);
ArrayAdapter<CharSequence> m1cdadapter = ArrayAdapter.createFromResource(this, R.array.m1_cd_list, R.layout.my_normal_spinner_style);
m1cdadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
m1cdspinner.setAdapter(m1cdadapter);
//
// create METHOD 1 ELLIPTICAL DIAMETER1 SPINNER (m1_cd_spinner) with displayed text 'centered'
//
Spinner m1els1spinner = (Spinner)findViewById(R.id.m1_els1_spinner);
ArrayAdapter<CharSequence> m1els1adapter = ArrayAdapter.createFromResource(this, R.array.m1_els1_list, R.layout.my_normal_spinner_style);
m1els1adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
m1els1spinner.setAdapter(m1els1adapter);
//
// create METHOD 1 ELLIPTICAL DIAMETER2 SPINNER (m1_cd_spinner) with displayed text 'centered'
//
Spinner m1els2spinner = (Spinner)findViewById(R.id.m1_els2_spinner);
ArrayAdapter<CharSequence> m1els2adapter = ArrayAdapter.createFromResource(this, R.array.m1_els2_list, R.layout.my_normal_spinner_style);
m1els2adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
m1els2spinner.setAdapter(m1cdadapter);
}
答案 0 :(得分：2)
这里有很多问题，我甚至不知道从哪里开始。这当然不会编译，因为你有不平衡的{}，但这不仅仅是你的问题
你的第一个if / then包括所有其他的并阻止任何其他人解析为真如
if (((m1ssspinner.getSelectedItem() == "Square")))
封装所有其他测试，例如下一个
if (((m1ssspinner.getSelectedItem() == "Rectangle")))
如果第一个是真的，那么第二个永远不会。
您还有不同类型的本地和类范围的变量，这些变量具有相同的名称，并且本地未初始化（或者没有正确的类型）
AdapterView<SpinnerAdapter> m1ssspinner; // Probably not what you want to use ...
Spinner m1ssspinner = (Spinner) ...
然后你有重复测试的块
if ((m1_rs1.getText().length() == 0) // Same test twice!
|| (m1_rs1.getText().toString() == " ")
|| (m1_rs1.getText().toString() == " ")
|| (m1_rs1.getText().length() == 0))
或者你正在做同样的事情，还要测试一个字符串对int
if (((m1ssspinner.getSelectedItem() == "Elliptical"))) {
if ((m1_els1.getText().length() == 0)
|| (m1_els1.getText().toString() == " ")
|| (m1_els2.getText().toString() == 0) // you probably meant int!
|| (m1_els2.getText().toString() == " ")){
此外，您的测试是将从微调器返回的对象与字符串文字（它们不匹配）进行比较
您正在初级化您的视图类，而不是在setcontent视图等之后的oncreate等等。
无论如何这个块至少会编译，但是这个程序根本不会像写的那样工作，你还有很多东西可以解决。
我的建议是一步一步，如果你发现你有老鼠窝，如果/那你可能需要重新考虑解决方案
btnExecute.setOnClickListener(new View.OnClickListener()
{
private AlertDialog show;
public void onClick(View arg0)
{
//AdapterView<SpinnerAdapter> m1ssspinner; // Probably you meant to use the class scoped of same name
if (((m1ssspinner.getSelectedItem() == "Square"))) {
if ((m1_sqs1.getText().length() == 0)
|| (m1_sqs1.getText().toString() == " ")) {
show = new AlertDialog.Builder(mContext).setTitle("Error")
.setMessage("The Square Side length is empty")
.setPositiveButton("OK", null).show();
} else
{
double result = new Double(m1_sqs1.getText().toString()) * new Double(m1_sqs1.getText().toString());
m1_sa_in.setText(Double.toString(result));
}
} else
if (((m1ssspinner.getSelectedItem() == "Rectangle"))) {
if ((m1_rs1.getText().length() == 0)
|| (m1_rs1.getText().toString() == " ")
|| (m1_rs1.getText().toString() == " ")
|| (m1_rs1.getText().length() == 0)) {
show = new AlertDialog.Builder(mContext).setTitle("Error")
.setMessage("A Rectangle Side length is empty")
.setPositiveButton("OK", null).show();
} else
{
double result = new Double(m1_rs1.getText().toString()) * new Double(m1_rs2.getText().toString());
m1_sa_in.setText(Double.toString(result));
}
} else
if (((m1ssspinner.getSelectedItem() == "Circle"))) {
if ((m1_cd.getText().length() == 0)
|| (m1_cd.getText().toString() == " ")
|| (m1_cd.getText().toString() == " "))
{
show = new AlertDialog.Builder(mContext).setTitle("Error")
.setMessage("The Circle Diameter is empty")
.setPositiveButton("OK", null).show();
} else
{
double result = new Double(m1_cd.getText().toString()) * new Double(m1_cd.getText().toString());
m1_sa_in.setText(Double.toString(result));
}
} else
if ((m1ssspinner.getSelectedItem() == "Elliptical")) {
if ((m1_els1.getText().length() == 0)
|| (m1_els1.getText().toString() == " ")
|| (m1_els2.getText().length() == 0)
|| (m1_els2.getText().toString() == " "))
{
show = new AlertDialog.Builder(mContext).setTitle("Error")
.setMessage("An Elliptical Diameter is empty")
.setPositiveButton("OK", null).show();
} else {
double result = new Double(m1_els1.getText().toString()) * new Double(m1_els2.getText().toString());
m1_sa_in.setText(Double.toString(result));
}
}
}
}
);
答案 1 :(得分：0)
下面似乎错了。将AlertDialog显示在函数
中btnExecute.setOnClickListener(new View.OnClickListener()
{
private AlertDialog show;
public void onClick(View arg0)
答案 2 :(得分：0)
带括号的错误。我建议你通过一个数字来设置评论。
如果您打开括号，请添加1，如果您有一个括号，则减1。
这将有助于您将来克服这个问题：
if(true)
{ //1
while(true)
{ //2
} //1
} //0
答案 3 :(得分：0)
问题在你的btnExecute.you没有放'}'。在btnExecute之后看到最后的其他你要放另一个}
答案 4 :(得分：0)
以下没有结束括号......
btnExecute.setOnClickListener(new View.OnClickListener() { ...
public void onClick(View arg0) { ...
if (((m1ssspinner.getSelectedItem() == "Square"))) { ...
if (((m1ssspinner.getSelectedItem() == "Rectangle"))) { ...
if (((m1ssspinner.getSelectedItem() == "Circle"))) { ...
if (((m1ssspinner.getSelectedItem() == "Elliptical"))) { ...
您的btnExecute.setOnClickListener应如下所示
btnExecute.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
... your if statements ...
}
});