这是一个小应用程序，它会询问一些问题，然后它会显示答案。当我们完成所有问题的回答后，会出现新的活动并向我们显示除最后一个之外的所有答案。我搜索了这个问题，看到了答案，但没有一个在我的情况下工作。谢谢你的帮助。 这是我的代码：
主要布局的XML代码。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.itrio.iqtest.Result_QA"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Answers"
android:textSize="22sp"
android:textStyle="bold"
android:layout_margin="20dp"/>
<ListView
android:id="@+id/result_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ListView>
</LinearLayout>
另一个XML自定义视图。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:padding="10dp">
<TextView
android:id="@+id/question_result"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:textSize="18sp"
android:textStyle="bold">
</TextView>
<View
android:layout_width="match_parent"
android:layout_height="10dp"/>
<TextView
android:textStyle="italic"
android:id="@+id/answer_result"
android:layout_width="fill_parent"
android:textSize="18sp"
android:layout_marginBottom="10dp"
android:layout_height="wrap_content">
</TextView>
</LinearLayout>
以下是问题代码：
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Collections;
public class Genius extends AppCompatActivity {
private TextView question_view;
private Button mNext;
int currentQ = 0;
RadioGroup genius_rg;
RadioButton op1, op2, op3, op4,checked;
private int score;
int turns=0;
boolean check= false, shuffle = true;
String[] questions = new String[8];
String[] answers = new String[8];
//Keys
private static final String Question_Index_key = "Index value of Questions";
private static final String Checked_Radio = "Selected radio Button";
private static final String Is_Radio_Checked = "ISC";
private static final String Do_Not_Shuffle_Again = "Dont' shuffle";
public static final String Result_Questions = "questions to display at result activity";
public static final String Result_Answers = "answers to display at result activity";
ArrayList<Genius_Questions> bank= new ArrayList<Genius_Questions>(){
{
add( new Genius_Questions("There are seventy bottles on a table. If one falls down, then how many remain? (Voice)" , "7","6","0","68","6"));
add(new Genius_Questions("How many numbers from 1 - 100, which have the letter 'A' in their spellings?", "13", "54", "2", "0", "0"));
add(new Genius_Questions("If you choose an answer to this question at random, what is the chance you will be correct?", "25%", "0%", "50%", "25%", "0%"));
// add(new Genius_Questions("Rearrange the letters of the name SOCRATES to give two other eight letter words. What will be the first letter of both words?","T","R","C","S",""));
add(new Genius_Questions("A pet shop has 8 hamsters, 18 rabbits and 7 guinea pigs. How many dogs does it have?","15","10","6","4","4"));
add(new Genius_Questions("What letter is next in this sequence?\n" +
"O, T, T, F, F, S, S, E, __ ", "O", "E", "N", "G", "N"));
add(new Genius_Questions("What letter is next in this sequence?\n" +
"M, A, M, J, J, A, S, O,__", "P", "N", "D", "F", "N"));
add(new Genius_Questions("Complete the following sentence: \"Read every third spot young...\"", "Vagrant", "Psycho", "Doppelganger", "Warrior", "Psycho"));
add(new Genius_Questions("?sdrawkcab nettirw iP ni srebmun ruof tsrif eht era tahW", "414.3", "141.3", "3.141", "411.3", "141.3"));
add(new Genius_Questions("What are ID ten T mistakes?", "IDIOTS", "IDENTITY", "I didn't get it", "Useless question.", "IDIOTS"));
add(new Genius_Questions("Clark does 5 sets of pushup, 6 sets of sit-up, 7 sets of squat, and 8 sets of bench dip in a day. So what do you think which organ in his body would be the largest?", "Muscles", "Skeleton", "Skin", "Nerves", "Skin"));
add(new Genius_Questions("It took 20,000 workers to build the Taj Mahal in 20 years. How many workers would be required to build it in 10 years?", "10,000", "40,000", "30,000", "Not Possible", "Not Possible"));
}
};
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(Question_Index_key,currentQ);
outState.putInt(Checked_Radio,genius_rg.getCheckedRadioButtonId());
outState.putBoolean(Is_Radio_Checked,check);
outState.putBoolean(Do_Not_Shuffle_Again, shuffle);
}
@Override
public void onBackPressed() {
super.onBackPressed();
Dialog alert_exit = new QuizExitAlert(Genius.this);
alert_exit.show();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
//Changes 'back' button action
if (keyCode == KeyEvent.KEYCODE_BACK) {
Dialog alert_exit = new QuizExitAlert(Genius.this);
alert_exit.show();
}
return true;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_genius);
if (savedInstanceState != null) {
currentQ = savedInstanceState.getInt(Question_Index_key);
if (savedInstanceState.getBoolean(Is_Radio_Checked)) {
checked = (RadioButton) findViewById(savedInstanceState.getInt(Checked_Radio));
checked.setChecked(true);
}
shuffle = savedInstanceState.getBoolean(Do_Not_Shuffle_Again);
}
question_view = (TextView) findViewById(R.id.question_genius);
genius_rg = (RadioGroup) findViewById(R.id.radio_genius);
op1 = (RadioButton) findViewById(R.id.g_op1);
op2 = (RadioButton) findViewById(R.id.g_op2);
op3 = (RadioButton) findViewById(R.id.g_op3);
op4 = (RadioButton) findViewById(R.id.g_op4);
Collections.shuffle(bank);
question_view.setText(bank.get(currentQ).getQ());
op1.setText(bank.get(currentQ).getOp1());
op2.setText(bank.get(currentQ).getOp2());
op3.setText(bank.get(currentQ).getOp3());
op4.setText(bank.get(currentQ).getOp4());
mNext = (Button) findViewById(R.id.next_genius);
mNext.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
turns++;
if (turns >= 8) {
new AlertDialog.Builder(Genius.this)
.setTitle("Done!!!")
.setMessage("You have answered all the questions.")
.setPositiveButton("Submit", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent result = new Intent(Genius.this,Result_QA.class);
result.putExtra(Result_Questions, questions);
result.putExtra(Result_Answers, answers);
startActivity(result);
}
}).show();
}else {
if (op1.isChecked() || op2.isChecked() || op3.isChecked() || op4.isChecked()) {
checked = (RadioButton) findViewById(genius_rg.getCheckedRadioButtonId());
if (bank.get(currentQ).getAns() == checked.getText()) {
score += 10;
}
questions[currentQ] = bank.get(currentQ).getQ();
answers[currentQ] = bank.get(currentQ).getAns();
genius_rg.clearCheck();
currentQ++;
question_view.setText(bank.get(currentQ).getQ());
op1.setText(bank.get(currentQ).getOp1());
op2.setText(bank.get(currentQ).getOp2());
op3.setText(bank.get(currentQ).getOp3());
op4.setText(bank.get(currentQ).getOp4());
} else {
Toast.makeText(Genius.this, "Select an option to proceed", Toast.LENGTH_SHORT).show();
}
}
}
});
}
}
以下是LisView Activity的代码：
import android.os.Bundle;
import android.app.Activity;
import android.widget.ListView;
public class Result_QA extends Activity {
ListView result;
ReslutListViewAdapter reslutListViewAdapter;
String[] ques, ans;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_result__q);
Bundle b= getIntent().getExtras();
ques = b.getStringArray(new Genius().Result_Questions);
ans = b.getStringArray(new Genius().Result_Answers);
result = (ListView) findViewById(R.id.result_view);
reslutListViewAdapter = new ReslutListViewAdapter(this, ques, ans);
System.out.println("adapter => "+reslutListViewAdapter.getCount());
result.setAdapter(reslutListViewAdapter);
}
}
ListViewAdapter类的代码：
import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
public class ReslutListViewAdapter extends BaseAdapter {
Activity context;
String[] questions;
String[] answers;
public ReslutListViewAdapter(Activity con, String[] ques, String[] ans){
super();
context = con;
questions = ques;
answers = ans;
}
@Override
public int getCount() {
return questions.length;
}
private class ViewHolder {
TextView mQ;
TextView mA;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
LayoutInflater inflater = context.getLayoutInflater();
if (convertView == null)
{
convertView = inflater.inflate(R.layout.result_listadapter, null);
holder = new ViewHolder();
holder.mQ = (TextView) convertView.findViewById(R.id.question_result);
holder.mA = (TextView) convertView.findViewById(R.id.answer_result);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
holder.mQ.setText(questions[position]);
holder.mA.setText(answers[position]);
return convertView;
}
}
答案 0 :(得分：1)
首先listview已经过了Recyclerview，这使我们的工作变得更轻松，并且在RecyclerView中进行了更多改进，以使开发人员的工作更轻松。
出现此问题时，ListView不支持wrap_content。因此，请将ListView的高度和宽度更改为match_parent。然后在适配器xml文件中，父布局高度应为wrap_content，但您已将其提及为match_parent，因此也将其更改为wrap_content。希望这可以解决您的问题。如果上述解决方案不起作用，请尝试删除适配器XML布局中的填充和边距（来自result_listadapter.xml文件中的父布局）。
FYI fill_parent已被弃用，我们应该使用match_parent代替。因此，请避免使用fill_parent。
希望这会有所帮助：）