Android StartActivityForResult更新ListView中的行

我有一个使用ListView显示主题列表的活动。每行都有一个文本视图，设置为红色表示该主题的问题尚未回答。当用户单击一行时，它应该启动一个活动，询问关于该主题的问题

我想通过调用startActivityForResult来启动活动，这将使用问题被询问的事实更新行，并将文本视图变为绿色

我的问题是如何从onActivityResult更新listview中的特定行

public class QuestionListForInTransaction extends ActionBarActivity {

    ListView listView;


      public void onCreate(Bundle icicle) {
            super.onCreate(icicle);

            setContentView(R.layout.questionlistforintxlayout);
            getSupportActionBar().setDisplayShowHomeEnabled(true);
            getSupportActionBar().setIcon(R.drawable.ic_launcher);
            setTitle("Call Question(s)");

            listView = (ListView)findViewById(R.id.txinquestionlist);

            String[] values = new String[] { "Are you the driver?", "Question 2", "Question 3", };


            MySimpleArrayAdapter adapter = new MySimpleArrayAdapter(this, values);
            listView.setAdapter(adapter);
            listView.setOnItemClickListener(listener);




          }//end of onCreate




          public class MySimpleArrayAdapter extends ArrayAdapter<String> {
              private final Context context;
              private final String[] values;

              public MySimpleArrayAdapter(Context context, String[] values) {
                super(context, R.layout.questionlisttxinrowlayout, values);
                this.context = context;
                this.values = values;
              }

              @Override
              public View getView(int position, View convertView, ViewGroup parent) {

                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                View rowView = inflater.inflate(R.layout.questionlisttxinrowlayout, parent, false);

                TextView question = (TextView) rowView.findViewById(R.id.tvquestionforintx);
                question.setText(values[position]);

                TextView answered = (TextView) rowView.findViewById(R.id.rowstatusbox);
                answered.setBackgroundColor(Color.RED);

                String questionStr = values[position];
                rowView.setTag(questionStr);


                return rowView;

              }




            } //end of adapter class



          OnItemClickListener listener = new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                //Toast.makeText(QuestionListForInTransaction.this, "pos = " + position, Toast.LENGTH_LONG).show();

                String question = (String)view.getTag();

                if(question.equalsIgnoreCase("Are you the driver?")){

                     //Toast.makeText(QuestionListForInTransaction.this, "Are you the driver?" + position, Toast.LENGTH_LONG).show();

                    final int QUESTION_REQUEST = 1;
                    Intent questionIntent = new Intent(QuestionListForInTransaction.this, Question.class);
                    startActivityForResult(questionIntent, QUESTION_REQUEST);

                     //TextView answered = (TextView) view.findViewById(R.id.rowstatusbox);
                     //answered.setBackgroundColor(Color.GREEN);

                }


            }
        };


        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent intent){
            super.onActivityResult(requestCode, resultCode, intent);
            Bundle extras = intent.getExtras();
            if(extras != null)
            int result = extras.getInt("result");

            //*********************update a row green**********************
        }

    } //end of class

Intransaction的公共类问题列表扩展了ActionBarActivity{
列表视图列表视图；
创建公共空间（捆绑冰柱）{
超级冰柱；
setContentView（R.layout.questionlistforintxlayout）；
getSupportActionBar（）.setDisplayShowHomeEnabled（true）；
getSupportActionBar（）.setIcon（R.drawable.ic_启动器）；
片名（“通话问题”）；
listView=（listView）findViewById（R.id.txinquestionlist）；
字符串[]值=新字符串[]{“你是司机吗？”，“问题2”，“问题3”，}；
mysimplarrayadapter adapter=新的mysimplarrayadapter（这个值）；
setAdapter（适配器）；
setOnItemClickListener（listener）；
}//onCreate结束
公共类MySimpleArrayAdapter扩展了ArrayAdapter{
私人最终语境；
私有最终字符串[]值；
公共MySimpleArrayAdapter（上下文上下文，字符串[]值）{
super（上下文，R.layout.QuestionListXinRowLayout，值）；
this.context=上下文；
这个值=值；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
LayoutFlater充气器=（LayoutFlater）context.getSystemService（context.LAYOUT\u充气器\u服务）；
视图行视图=充气机。充气（R.layout.questionlistxinRowLayout，父级，false）；
TextView问题=（TextView）rowView.findViewById（R.id.tvquestionforintx）；
问题.setText（值[位置]）；
TextView answered=（TextView）rowView.findViewById（R.id.rowstatusbox）；
回答：挫折背景色（颜色：红色）；
字符串questionStr=值[位置]；
rowView.setTag（questionStr）；
返回行视图；
}
}//适配器类的结尾
OnItemClickListener=新建OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父对象、视图、整型位置、长id）{
//Toast.makeText（QuestionListForInTransaction.this，“pos=“+位置，Toast.LENGTH_LONG）.show（）；
String question=（String）view.getTag（）；
如果（问题.equalsIgnoreCase（“你是司机吗？”））{
//Toast.makeText（QuestionListForInTransaction.this，“你是司机吗？”+位置，Toast.LENGTH\u LONG.show（）；
最后一个整型问题要求=1；
意向questionIntent=新意向（QuestionListForInTransaction.this，Question.class）；
startActivityForResult（问题意图、问题请求）；
//TextView answered=（TextView）view.findViewById（R.id.rowstatusbox）；
//回答：挫折背景色（颜色：绿色）；
}
}
};
@凌驾
ActivityResult上受保护的void（int-requestCode、int-resultCode、Intent-Intent）{
super.onActivityResult（请求代码、结果代码、意图）；
Bundle extras=intent.getExtras（）；
如果（附加值！=null）
int result=extras.getInt（“结果”）；
//*********************将行更新为绿色**********************
}
}//下课

只需创建一些自定义包装类，如下所示：

public class QuestionWrapper {
private String mQuestionText;
private boolean mIsAsked;

public QuestionWrapper(String defaultQuestionText, boolean isAsked) {
    mQuestionText = defaultQuestionText;
    mIsAsked = isAsked;
}

public boolean isAsked() {
    return mIsAsked;
}

public void setIsAswked(boolean isAsked) {
    mIsAsked = isAsked;
}

public String getQuestionText() {
    return mQuestionText;
}

    public class MySimpleArrayAdapter extends ArrayAdapter<QuestionWrapper> {
    private final Context context;
    private final List<QuestionWrapper> mWrappers;

    public MySimpleArrayAdapter(Context context, List<QuestionWrapper> wrappers) {
        super(context, R.layout.questionlisttxinrowlayout, wrappers);
        this.context = context;
        this.mWrappers = wrappers;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View rowView = inflater.inflate(R.layout.questionlisttxinrowlayout, parent, false);
        QuestionWrapper wrapper = mWrappers.get(position);
        TextView question = (TextView) rowView.findViewById(R.id.tvquestionforintx);
        question.setText(wrapper.getQuestionText());

        TextView answered = (TextView) rowView.findViewById(R.id.rowstatusbox);
        if (wrapper.isAsked()) {
            answered.setBackgroundColor(Color.GREEN);
        } else {
            answered.setBackgroundColor(Color.RED);
        }

        rowView.setTag(wrapper.getQuestionText());

        return rowView;

    }

}

然后，您需要将此包装器列表设置为适配器：

public class QuestionListForInTransaction extends ActionBarActivity {
    List<QuestionWrapper>  mWrappers = new ArrayList<>();
    MySimpleArrayAdapter mAdapter;

并按如下方式更新适配器：

public class QuestionWrapper {
private String mQuestionText;
private boolean mIsAsked;

public QuestionWrapper(String defaultQuestionText, boolean isAsked) {
    mQuestionText = defaultQuestionText;
    mIsAsked = isAsked;
}

public boolean isAsked() {
    return mIsAsked;
}

public void setIsAswked(boolean isAsked) {
    mIsAsked = isAsked;
}

public String getQuestionText() {
    return mQuestionText;
}

    public class MySimpleArrayAdapter extends ArrayAdapter<QuestionWrapper> {
    private final Context context;
    private final List<QuestionWrapper> mWrappers;

    public MySimpleArrayAdapter(Context context, List<QuestionWrapper> wrappers) {
        super(context, R.layout.questionlisttxinrowlayout, wrappers);
        this.context = context;
        this.mWrappers = wrappers;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View rowView = inflater.inflate(R.layout.questionlisttxinrowlayout, parent, false);
        QuestionWrapper wrapper = mWrappers.get(position);
        TextView question = (TextView) rowView.findViewById(R.id.tvquestionforintx);
        question.setText(wrapper.getQuestionText());

        TextView answered = (TextView) rowView.findViewById(R.id.rowstatusbox);
        if (wrapper.isAsked()) {
            answered.setBackgroundColor(Color.GREEN);
        } else {
            answered.setBackgroundColor(Color.RED);
        }

        rowView.setTag(wrapper.getQuestionText());

        return rowView;

    }

---

我认为对于startActivityForResult中的RequestCode，您可以使用Adapter click position。

只需创建一些自定义包装类，如下所示：

public class QuestionWrapper {
private String mQuestionText;
private boolean mIsAsked;

public QuestionWrapper(String defaultQuestionText, boolean isAsked) {
    mQuestionText = defaultQuestionText;
    mIsAsked = isAsked;
}

public boolean isAsked() {
    return mIsAsked;
}

public void setIsAswked(boolean isAsked) {
    mIsAsked = isAsked;
}

public String getQuestionText() {
    return mQuestionText;
}

    public class MySimpleArrayAdapter extends ArrayAdapter<QuestionWrapper> {
    private final Context context;
    private final List<QuestionWrapper> mWrappers;

    public MySimpleArrayAdapter(Context context, List<QuestionWrapper> wrappers) {
        super(context, R.layout.questionlisttxinrowlayout, wrappers);
        this.context = context;
        this.mWrappers = wrappers;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View rowView = inflater.inflate(R.layout.questionlisttxinrowlayout, parent, false);
        QuestionWrapper wrapper = mWrappers.get(position);
        TextView question = (TextView) rowView.findViewById(R.id.tvquestionforintx);
        question.setText(wrapper.getQuestionText());

        TextView answered = (TextView) rowView.findViewById(R.id.rowstatusbox);
        if (wrapper.isAsked()) {
            answered.setBackgroundColor(Color.GREEN);
        } else {
            answered.setBackgroundColor(Color.RED);
        }

        rowView.setTag(wrapper.getQuestionText());

        return rowView;

    }

}

然后，您需要将此包装器列表设置为适配器：

public class QuestionListForInTransaction extends ActionBarActivity {
    List<QuestionWrapper>  mWrappers = new ArrayList<>();
    MySimpleArrayAdapter mAdapter;

并按如下方式更新适配器：

public class QuestionWrapper {
private String mQuestionText;
private boolean mIsAsked;

public QuestionWrapper(String defaultQuestionText, boolean isAsked) {
    mQuestionText = defaultQuestionText;
    mIsAsked = isAsked;
}

public boolean isAsked() {
    return mIsAsked;
}

public void setIsAswked(boolean isAsked) {
    mIsAsked = isAsked;
}

public String getQuestionText() {
    return mQuestionText;
}

    public class MySimpleArrayAdapter extends ArrayAdapter<QuestionWrapper> {
    private final Context context;
    private final List<QuestionWrapper> mWrappers;

    public MySimpleArrayAdapter(Context context, List<QuestionWrapper> wrappers) {
        super(context, R.layout.questionlisttxinrowlayout, wrappers);
        this.context = context;
        this.mWrappers = wrappers;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View rowView = inflater.inflate(R.layout.questionlisttxinrowlayout, parent, false);
        QuestionWrapper wrapper = mWrappers.get(position);
        TextView question = (TextView) rowView.findViewById(R.id.tvquestionforintx);
        question.setText(wrapper.getQuestionText());

        TextView answered = (TextView) rowView.findViewById(R.id.rowstatusbox);
        if (wrapper.isAsked()) {
            answered.setBackgroundColor(Color.GREEN);
        } else {
            answered.setBackgroundColor(Color.RED);
        }

        rowView.setTag(wrapper.getQuestionText());

        return rowView;

    }

---

我认为对于startActivityForResult中的RequestCode，您可以使用适配器单击位置。

您可以创建自定义类，使用两个值String和boolean，并在得到结果时将boolean设置为false。然后通知适配器。您可以创建自定义类，有两个值String和boolean，并在得到结果时将boolean设置为false。然后通知适配器。嘿，谢谢你花时间这么做，谢谢！但是，我得到了一个错误，“显式调用构造函数时无法引用实例字段mWrappers”。这是针对适配器构造函数的超级部分中的mWrappers变量。我刚刚在outter类中重命名了mWapper。非常感谢你的帮助：）嘿，谢谢你花时间做这件事，谢谢！但是，我得到了一个错误，“显式调用构造函数时无法引用实例字段mWrappers”。这是针对适配器构造函数的超级部分中的mWrappers变量。我刚刚在outter类中重命名了mWapper。非常感谢您的帮助：）