我正在开发测验应用程序,用户可以选择 4 种类型的问题难度。问题和答案作为字符串数组存储在 string.xml 中。
如果勾选了所有复选框,则相应的字符串数组将存储到 ArrayList NUM_ALL_QuestionNames 以供以后测验检索,因为里面的问题将进一步混合和打乱。
完整编码如下:
public class Num_index extends Activity
{
String[] NUM_SIM_QuestionNames;
String[] NUM_MED_QuestionNames;
String[] NUM_DIF_QuestionNames;
String[] NUM_EXP_QuestionNames;
String[] NUM_SIM_AnswerNames;
String[] NUM_MED_AnswerNames;
String[] NUM_DIF_AnswerNames;
String[] NUM_EXP_AnswerNames;
private List<String> NUM_ALL_QuestionNames; // for quiz
private List<String> NUM_ALL_AnswerNames; // for quiz
private int QuestionImport;
private TextView CheckTextView;
private TextView AlertTextView;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main_num_index);
Button ButtonStart= (Button) findViewById(R.id.buttonStart);
ButtonStart.setOnClickListener(startButtonListener);
CheckTextView = (TextView) findViewById(R.id.checktextView);
AlertTextView = (TextView) findViewById(R.id.alerttextView);
AlertTextView.setText("Start: No alert");
NUM_SIM_QuestionNames = getResources().getStringArray(R.array.Num_Q_Simple_List);
NUM_MED_QuestionNames = getResources().getStringArray(R.array.Num_Q_Medium_List);
NUM_DIF_QuestionNames = getResources().getStringArray(R.array.Num_Q_Diff_List);
NUM_EXP_QuestionNames = getResources().getStringArray(R.array.Num_Q_Expert_List);
NUM_SIM_AnswerNames = getResources().getStringArray(R.array.Num_A_Simple_List);
NUM_MED_AnswerNames = getResources().getStringArray(R.array.Num_A_Medium_List);
NUM_DIF_AnswerNames = getResources().getStringArray(R.array.Num_A_Diff_List);
NUM_EXP_AnswerNames = getResources().getStringArray(R.array.Num_A_Expert_List);
NUM_ALL_QuestionNames = new ArrayList<String>();
NUM_ALL_AnswerNames = new ArrayList<String>();
NUM_ALL_QuestionNames.clear();
NUM_ALL_AnswerNames.clear();
};
private OnClickListener startButtonListener = new OnClickListener()
{
@Override
public void onClick(View v)
{
CheckBox CheckSim = (CheckBox) findViewById(R.id.checkBox2);
CheckBox CheckMed = (CheckBox) findViewById(R.id.checkBox3);
CheckBox CheckDif = (CheckBox) findViewById(R.id.checkBox4);
CheckBox CheckExp = (CheckBox) findViewById(R.id.checkBox5);
if (CheckSim.isChecked())
{
QuestionImport= 0;
QuestionImport = NUM_SIM_QuestionNames.length;
int i =0;
while (i<QuestionImport)
{
String Q_toimport = NUM_SIM_QuestionNames[i];
String A_toimport = NUM_SIM_AnswerNames[i];
NUM_ALL_QuestionNames.add(Q_toimport);
NUM_ALL_AnswerNames.add(A_toimport);
++i;
}
};
// same for other checkbox, not shown here for simplicity //
if ((!CheckSim.isChecked()) && (!CheckMed.isChecked()) && (!CheckDif.isChecked()) && (!CheckExp.isChecked()))
{
int k = 0;
if (NUM_ALL_QuestionNames.size() >0) {k= NUM_ALL_QuestionNames.size();}
CheckTextView.setText(k);
AlertTextView.setText("Please select at least one choice!");
}
if ((CheckSim.isChecked()) || (CheckMed.isChecked()) || (CheckDif.isChecked()) || (CheckExp.isChecked()))
{
int k = 0;
if (NUM_ALL_QuestionNames.size() >0) {k= NUM_ALL_QuestionNames.size();}
CheckTextView.setText(k);
AlertTextView.setText("Have Selection!");
}
}
};
日志猫:
11-17 21:55:41.510: E/AndroidRuntime(12639): FATAL EXCEPTION: main
11-17 21:55:41.510: E/AndroidRuntime(12639): android.content.res.Resources$NotFoundException: String resource ID #0x0
11-17 21:55:41.510: E/AndroidRuntime(12639): at android.content.res.Resources.getText(Resources.java:260)
11-17 21:55:41.510: E/AndroidRuntime(12639): at android.widget.TextView.setText(TextView.java:3680)
11-17 21:55:41.510: E/AndroidRuntime(12639): at com.pearappx.iq_3.Num_index$1.onClick(Num_index.java:188)
11-17 21:55:41.510: E/AndroidRuntime(12639): at android.view.View.performClick(View.java:3627)
11-17 21:55:41.510: E/AndroidRuntime(12639): at android.view.View$PerformClick.run(View.java:14329)
11-17 21:55:41.510: E/AndroidRuntime(12639): at android.os.Handler.handleCallback(Handler.java:605)
11-17 21:55:41.510: E/AndroidRuntime(12639): at android.os.Handler.dispatchMessage(Handler.java:92)
11-17 21:55:41.510: E/AndroidRuntime(12639): at android.os.Looper.loop(Looper.java:137)
11-17 21:55:41.510: E/AndroidRuntime(12639): at android.app.ActivityThread.main(ActivityThread.java:4511)
11-17 21:55:41.510: E/AndroidRuntime(12639): at java.lang.reflect.Method.invokeNative(Native Method)
11-17 21:55:41.510: E/AndroidRuntime(12639): at java.lang.reflect.Method.invoke(Method.java:511)
11-17 21:55:41.510: E/AndroidRuntime(12639): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
11-17 21:55:41.510: E/AndroidRuntime(12639): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
11-17 21:55:41.510: E/AndroidRuntime(12639): at dalvik.system.NativeStart.main(Native Method)
问题:
执行应用程序时,在第 188 行出现错误,即
CheckTextView.setText(k) 的行;
我只想看看 NUM_ALL_QuestionNames 是否已经导入了所有字符串,即如果每个数组都有 8 个值,如果勾选了所有 4 个级别,CheckTextView 将显示 32,如果勾选了 3,则显示 24,依此类推。
但是要解决188行的问题呢?非常感谢!!