以下代码导致我的应用程序停止工作：
// Passing values to the results activity
Intent intent = new Intent(this, TestResults.class);
intent.putExtra("results", results);
intent.putExtra("Questions", question);
intent.putExtra("CorrectAnswer", correctAnswer);
//this.startActivity(intent);
//passing the score value to the splash activity
Intent SplashIntent = new Intent(this, SplashTest.class);
SplashIntent.putExtra("score", score);
this.startActivity(SplashIntent);
这是因为我在一项活动中有两个意图吗？
Log Cat Crash报告：
04-15 16:33:13.894: E/AndroidRuntime(2322): FATAL EXCEPTION: main
04-15 16:33:13.894: E/AndroidRuntime(2322): Process: com.example.multapply, PID: 2322
04-15 16:33:13.894: E/AndroidRuntime(2322): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.multapply/com.example.multapply.SplashTest}: android.content.res.Resources$NotFoundException: String resource ID #0x0
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.app.ActivityThread.access$800(ActivityThread.java:135)
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.os.Handler.dispatchMessage(Handler.java:102)
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.os.Looper.loop(Looper.java:136)
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.app.ActivityThread.main(ActivityThread.java:5017)
04-15 16:33:13.894: E/AndroidRuntime(2322): at java.lang.reflect.Method.invokeNative(Native Method)
04-15 16:33:13.894: E/AndroidRuntime(2322): at java.lang.reflect.Method.invoke(Method.java:515)
04-15 16:33:13.894: E/AndroidRuntime(2322): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
04-15 16:33:13.894: E/AndroidRuntime(2322): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
04-15 16:33:13.894: E/AndroidRuntime(2322): at dalvik.system.NativeStart.main(Native Method)
04-15 16:33:13.894: E/AndroidRuntime(2322): Caused by: android.content.res.Resources$NotFoundException: String resource ID #0x0
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.content.res.Resources.getText(Resources.java:244)
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.widget.TextView.setText(TextView.java:3888)
04-15 16:33:13.894: E/AndroidRuntime(2322): at com.example.multapply.SplashTest.onCreate(SplashTest.java:32)
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.app.Activity.performCreate(Activity.java:5231)
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
04-15 16:33:13.894: E/AndroidRuntime(2322): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
04-15 16:33:13.894: E/AndroidRuntime(2322): ... 11 more
崩溃报告来自应用程序崩溃的部分
编辑：具有两个意图的类：
public class Test extends Activity implements View.OnClickListener{
//declare vars
TextView text;
EditText answer;
Button submit;
int random1;
int random2;
String[] question= new String[10];//change to array?
int correctAnswer[]=new int[10];//change to array?
int[] results=new int[10];
int score=0;
int questionNumber=1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
// initialising variables
initialiseVars();
//set up random
setUpRandom();
//Set text view equal to question
text.setText(question[questionNumber-1]);
//set on click listener for submit button
submit.setOnClickListener(this);
//updateQuestion?
updateQuestion();
}
public void initialiseVars() {
text = (TextView) findViewById(R.id.tvTopRandomTest);
answer = (EditText) findViewById(R.id.etEnterAnswerRandomTest);
submit = (Button) findViewById(R.id.btnSubmitRandomTest);
}
public void setUpRandom(){
//setting up randoms
Random random= new Random();
// Generating random number between 1 and 12
random1 = random.nextInt(12) + 1;
// Generating another random number between 1 and 12
random2 = random.nextInt(12) + 1;
question[questionNumber-1]= random1 + " x " + random2 + " = ";
correctAnswer[questionNumber-1]= random1*random2; //note: possibly may not be used
}
public void updateQuestion(){
//updating question after each click
setUpRandom();
text.setText(question[questionNumber-1]);
answer.setText("");
}
public void onClick(View v){
// sets text view equal to whats typed in in editText
final String entry = answer.getText().toString();
// convert from string value to int
int a = Integer.parseInt(entry); // note: maybe change name
//setting the user answer equal to the question
results[questionNumber-1]=a;
if(a==correctAnswer[questionNumber-1]){
score++;
}
if (questionNumber < 10) {
questionNumber++;//updates question
// called after an answer is given
updateQuestion();
} else {
// Passing values to the results activity
Intent intent = new Intent(this, TestResults.class);
intent.putExtra("results", results);
intent.putExtra("Questions", question);
intent.putExtra("CorrectAnswer", correctAnswer);
//this.startActivity(intent);
//passing the score value to the splash activity
Intent SplashIntent = new Intent(this, SplashTest.class);
SplashIntent.putExtra("score", score);
this.startActivity(SplashIntent);
}
}
}
答案 0 :(得分：2)
问题是，在用第一个意图调用startActivity()之后，之后的代码不会被执行。这意味着您尝试在SplashTest中访问的任何数据实际上都不存在。此问题的解决方法是将数据保存到内部/外部存储或SharedPreferences并从那里访问它。
由于您的数组不大，我们绝对可以使用SharePreferences来存储数据。
我们将SharedPreferences中的每个数据保存为String-String键值对。
要存储int数组，我们可以将所有元素组合成一个String，并使用逗号作为分隔符。
存储“问题”String数组作为String是一个有趣的问题，因为String可能包含任何字符。这使得难以有效地选择分隔符。我写了一个名为EncodeDecode的类，将String数组转换为String（并返回）：https://gist.github.com/liangricha/10759438。随意阅读代码/提供反馈。它应该是完全有用的。
我的代码片段使用我EncodeDecode中的函数。
保存数据
要将数据存储在SharedPreferences中，您可以写：
//Grab SharedPreferences of application.
SharedPreferences.Editor editor = getSharedPreferences("Data", MODE_PRIVATE).edit();
//Use StringBuilder to build data string.
StringBuilder strBuild = new StringBuilder();
//Store "results"(int array)
for(int i = 0; i < results.length; i++)
strBuild.append(str.append(correctAnswer[i]).append(","));
editor.putString("results", strBuild.toString());
strBuild.setLength(0);
//Store "question"(String array) ***REFERENCES CLASS IN GIST ABOVE***
String arrStr = EncodeDecode.encode(question)
editor.putString("questions", arrString);
//Store "correctAnswer"(int array)
for(int i = 0; i < correctAnswer.length; i++)
strBuild.append(str.append(correctAnswer[i]).append(","));
editor.putString("correctAnswer", strBuild.toString());
//Store "score"(int)
editor.putString("score", Integer.toString(score));
//Write changes to disk.
editor.commit();
检索数据
首先，获取对SharedPreferences的引用：
SharedPreferences prefs = getSharedPreferences("Data", MODE_PRIVATE);
获取“结果”int数组：
String[] resultsStrs = prefs.getString("results", "").split(",");
int arrLength = resultsStrs.length;
int[] results = new int[arrLength];
for(int i = 0; i < resultsStrs.length; i++)
results[i] = Integer.parseInt(resultsStrs[i]);
获取“问题”字符串数组：
String qStr = prefs.getString("question", "");
String[] question = EncodeDecode.decode(qStr);
获取“correctAnswer”int数组：
String[] correctAnsStrs = prefs.getString("correctAnswer", "").split(",");
int arrLength = correctAnsStrs.length;
int[] correctAnswer = new int[arrLength];
for(int i = 0; i < correctAnsStrs.length; i++)
correctAnswer[i] = Integer.parseInt(correctAnsStrs[i]);
获得“得分”int：
String scoreStr = prefs.getString("score", "");
int score = Integer.parseInt(scoreStr);
答案 1 :(得分：0)
问题是在同一个活动中没有或没有更多的意图：来自java视点的Intent是一个对象，所以你可以分配你想要的任意数量。
但是当你执行startActivity（）时，你正在停止当前活动以启动一个新活动，因此，在该调用之后，任何后续代码都不会被保证执行，因为它包含在正在停止的活动中。
你必须将startActivity（）视为无返回调用，如return语句，因此不要在此之后放置任何代码。
答案 2 :(得分：0)
崩溃报告中的错误显示您正在尝试调用setText（int）（当我假设您实际上尝试将其设置为通过Intent传递的String时，这是实际上被解析为int）。
在您的第二个活动中，您应该尝试拨打
setText(String.valueOf(your_int_variable_here));
确保它不会将其解析为资源ID（int）而不是实际的String。