上的Andr​​oid活动结果总是返回0和空意图 [英] Android on activity result always return 0 and null intent

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本文介绍了上的Andr​​oid活动结果总是返回0和空意图的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我试图从网上找到几乎所有的解决方案，仍然解决不了我的问题。会有人请通过以下方式codeS帮助吗？我真的不能使它发挥作用。即使我试图把的setResult code在onBack pressed事件，父活动仍然得到结果，code = 0。


  1. 在一个微调的触摸事件父[CreatePostActivity]开始为活动的结果：

@覆盖

 保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
        mContext =这一点;
        APPSTATE =（（ApplicationProvider）getApplicationContext（））;    LayoutInflater膨胀= LayoutInflater.from（本）;
    mContent = inflate.inflate（R.layout.activity_create_post，NULL）;
    的setContentView（mContent）;    spinnerCategory =（微调）mContent.findViewById（R.id.spinnerCategory）;
    spinnerCategory.setOnTouchListener（本）;    arrayCategory =新的String [] {getResources（）的getString（R.string.create_post_category）};
    adapterCategory =新ArrayAdapter＆LT;串GT;（这一点，android.R.layout.simple_spinner_item，arrayCategory）;
    spinnerCategory.setAdapter（adapterCategory）;}
@覆盖
公共布尔onTouch（视图V，MotionEvent事件）{    如果（v.getId（）== R.id.spinnerCategory）{
        束束=新包（）;
        bundle.putInt（类别ID的categoryId）;
        意向意图=新意图（这一点，CreatePostActivity_Category.class）;
        intent.putExtras（包）;
        // intent.setFlags（intent.FLAG_ACTIVITY_CLEAR_TOP）;
        startActivityForResult（意向，Variables.CREATEPOST_CATEGORY_ACTIVITY_REQUEST_ code）;
    }
    返回true;
}


  1. 儿童[CreatePostActivity_Category]包含一个ListView和中包含适配器初始化：

listitem_select_checkbox.xml 

 ＆LT;？XML版本=1.0编码=UTF-8＆GT？;
＆LT;的RelativeLayout的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    机器人：layout_width =match_parent
    机器人：layout_height =match_parent
    机器人：背景=@色/白
    机器人：填充=5DP＆GT;    ＆LT;的TextView
        机器人：ID =@ + ID / textViewItem
        风格=@风格/ Heading.h2
        机器人：layout_width =WRAP_CONTENT
        机器人：layout_height =WRAP_CONTENT
        机器人：layout_centerVertical =真
        机器人：文字=TextView的/＆GT;    ＆LT;复选框
        机器人：ID =@ + ID / checkBoxItem
        机器人：layout_width =WRAP_CONTENT
        机器人：layout_height =WRAP_CONTENT
        机器人：layout_alignParentRight =真
        机器人：layout_centerVertical =真/＆GT;＆LT; / RelativeLayout的＆GT;

CreatePostActivity接收：

  @覆盖
保护无效的onActivityResult（INT申请code，INT结果code，意图数据）{
    如果（要求code == Variables.CREATEPOST_CATEGORY_ACTIVITY_REQUEST_ code）{
        如果（结果code == RESULT_OK）{
            的System.out.println（OK）;
        }其他
            的System.out.println（CANCEL）;
    }
}

CreatePostActivity_Category：

 公共类CategoryAdapter扩展BaseAdapter实现OnCheckedChangeListener {
    私人LayoutInflater吹气= NULL;    公共CategoryAdapter（CategoryModel []列表）{
        吹气=（LayoutInflater）mContext.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
    }    @覆盖
    公众诠释的getCount（）{
        返回mListItems.length;
    }    @覆盖
    公共对象的getItem（INT位置）{
        返回的位置;
    }    @覆盖
    众长getItemId（INT位置）{
        返回的位置;
    }    @覆盖
    公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
        查看VI = convertView;
        如果（convertView == NULL）
            VI = inflater.inflate（R.layout.listitem_select_checkbox，NULL）;        TextView的textViewItem =（TextView中）vi.findViewById（R.id.textViewItem）;
        textViewItem.setText（mListItems [位置] .getDescription（（字符串）appState.get preference（变量preF_LANG）））;        复选框checkBoxItem =（复选框）vi.findViewById（R.id.checkBoxItem）;
        如果（==的categoryId mListItems [位置] .CategoryId）
            checkBoxItem.setChecked（真）;
        checkBoxItem.setTag（R.id.tag_id，mListItems [位置] .CategoryId）;
        checkBoxItem.setTag（R.id.tag_desc，mListItems [位置] .getDescription（（字符串）appState.get preference（变量preF_LANG）））;
        checkBoxItem.setOnCheckedChangeListener（本）;        返回VI;
    }    @覆盖
    公共无效onCheckedChanged（CompoundButton V，布尔器isChecked）{
        如果（器isChecked）{
            INT ID =的Integer.parseInt（（（CompoundButton）ⅴ）.getTag（R.id.tag_id）的ToString（））;
            desc字符串=（（CompoundButton）V）.getTag（R.id.tag_desc）的ToString（）;            束束=新包（）;
            bundle.putInt（类别ID，身份证）;
            bundle.putString（类别，DESC）;
            意图mIntent =新的Intent（）;
            mIntent.putExtras（包）;            如果（的getParent（）== NULL）{
                的setResult（Activity.RESULT_OK，mIntent）;
            }其他{
                的getParent（）的setResult（Activity.RESULT_OK，mIntent）。
            }
            完（）;
        }
    }
}@覆盖
保护无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;    mContext =这一点;
    APPSTATE =（（ApplicationProvider）getApplicationContext（））;
    数据库= DatabaseHelper.instance（）;    LayoutInflater膨胀= LayoutInflater.from（本）;
    mContent = inflate.inflate（R.layout.activity_create_post_category，NULL）;
    的setContentView（mContent）;    的ImageButton ibtnClose =（的ImageButton）mContent.findViewById（R.id.ibtnClose）;
    ibtnClose.setOnClickListener（新OnClickListener（）{
        公共无效的onClick（视图v）{
            完（）;
        }
    }）;    listViewCategory =（ListView控件）mContent.findViewById（R.id.listViewCategory）;
    光标CR = database.select（SELECT CATEGORY_ID，edesc，cdesc FROM类别）;
    mListItems =新CategoryModel [cr.getCount（）];    如果（CR！= NULL）{
        如果（cr.moveToFirst（））{
            INT I = 0;
            做{
                INT的categoryId = cr.getInt（cr.getColumnIndex（CATEGORY_ID））;
                串cdesc = cr.getString（cr.getColumnIndex（cdesc））;
                串edesc = cr.getString（cr.getColumnIndex（edesc））;
                mListItems [I] =新CategoryModel（的categoryId，cdesc，edesc）;
                我++;
            }而（cr.moveToNext（））;
        }
    }
    cr.close（）;    CategoryAdapter mCategoryAdapter =新CategoryAdapter（mContext，mListItems）;
    listViewCategory.setAdapter（mCategoryAdapter）;    MDATA = this.getIntent（）getExtras（）。
    的categoryId = mData.getInt（类别ID）;
}


解决方案

最后我想通了！

我写了一篇关于触摸监听器原来已经被解雇三次，这就是为什么它无法检索实际的返回结果。

这个解决它 - > 安卓设置微调onClickListener（） 

 私人View.OnTouchListener Spinner_OnTouch =新View.OnTouchListener（）{
    公共布尔onTouch（视图V，MotionEvent事件）{
        如果（event.getAction（）== MotionEvent.ACTION_UP）{            如果（v.getId（）== R.id.spinnerCategory）{
                束束=新包（）;
                bundle.putInt（类别ID的categoryId）;
                意向意图=新意图（mContext，CreatePostActivity_Category.class）;
                intent.putExtras（包）;
                startActivityForResult（意向，Variables.CREATEPOST_CATEGORY_ACTIVITY_REQUEST_ code）;
            }
        }
        返回true;
    }
};

一切正常。
感谢所有建议和正确的答案。

I tried almost all solutions found from the net and still can't solve my problem. Would anyone please help with the following codes? I really can't make it work. Even if I tried to put the setresult code in onBackPressed event, the parent activity still get result code = 0.

  1. Start activity for result in the parent [CreatePostActivity] on touch event of a spinner:

@Override

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        mContext = this;
        appState = ((ApplicationProvider) getApplicationContext());

    LayoutInflater inflate = LayoutInflater.from(this);
    mContent = inflate.inflate(R.layout.activity_create_post, null);
    setContentView(mContent);

    spinnerCategory = (Spinner) mContent.findViewById(R.id.spinnerCategory);
    spinnerCategory.setOnTouchListener(this);

    arrayCategory = new String[] { getResources().getString(R.string.create_post_category) };
    adapterCategory = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, arrayCategory);
    spinnerCategory.setAdapter(adapterCategory);}


@Override
public boolean onTouch(View v, MotionEvent event) {

    if (v.getId() == R.id.spinnerCategory) {
        Bundle bundle = new Bundle();
        bundle.putInt("CategoryId", categoryId);
        Intent intent = new Intent(this, CreatePostActivity_Category.class);
        intent.putExtras(bundle);
        // intent.setFlags(intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivityForResult(intent, Variables.CREATEPOST_CATEGORY_ACTIVITY_REQUEST_CODE);
    }
    return true;
}

  1. Child [CreatePostActivity_Category] contains a listview and initialize with adapter like below:

listitem_select_checkbox.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    android:padding="5dp" >

    <TextView
        android:id="@+id/textViewItem"
        style="@style/Heading.h2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:text="TextView" />

    <CheckBox
        android:id="@+id/checkBoxItem"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true" />

</RelativeLayout>

CreatePostActivity to receive :

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == Variables.CREATEPOST_CATEGORY_ACTIVITY_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
            System.out.println("OK");
        } else
            System.out.println("CANCEL");
    }
}

CreatePostActivity_Category:

public class CategoryAdapter extends BaseAdapter implements OnCheckedChangeListener {
    private LayoutInflater inflater = null;

    public CategoryAdapter(CategoryModel[] list) {
        inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {
        return mListItems.length;
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View vi = convertView;
        if (convertView == null)
            vi = inflater.inflate(R.layout.listitem_select_checkbox, null);

        TextView textViewItem = (TextView) vi.findViewById(R.id.textViewItem);
        textViewItem.setText(mListItems[position].getDescription((String) appState.getPreference(Variables.PREF_LANG)));

        CheckBox checkBoxItem = (CheckBox) vi.findViewById(R.id.checkBoxItem);
        if (categoryId == mListItems[position].CategoryId)
            checkBoxItem.setChecked(true);
        checkBoxItem.setTag(R.id.tag_id, mListItems[position].CategoryId);
        checkBoxItem.setTag(R.id.tag_desc, mListItems[position].getDescription((String) appState.getPreference(Variables.PREF_LANG)));
        checkBoxItem.setOnCheckedChangeListener(this);

        return vi;
    }

    @Override
    public void onCheckedChanged(CompoundButton v, boolean isChecked) {
        if (isChecked) {
            int id = Integer.parseInt(((CompoundButton) v).getTag(R.id.tag_id).toString());
            String desc = ((CompoundButton) v).getTag(R.id.tag_desc).toString();

            Bundle bundle = new Bundle();
            bundle.putInt("CategoryId", id);
            bundle.putString("Category", desc);
            Intent mIntent = new Intent();
            mIntent.putExtras(bundle);

            if (getParent() == null) {
                setResult(Activity.RESULT_OK, mIntent);
            } else {
                getParent().setResult(Activity.RESULT_OK, mIntent);
            }
            finish();
        }
    }
}



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    mContext = this;
    appState = ((ApplicationProvider) getApplicationContext());
    database = DatabaseHelper.instance();

    LayoutInflater inflate = LayoutInflater.from(this);
    mContent = inflate.inflate(R.layout.activity_create_post_category, null);
    setContentView(mContent);

    ImageButton ibtnClose = (ImageButton) mContent.findViewById(R.id.ibtnClose);
    ibtnClose.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            finish();
        }
    });

    listViewCategory = (ListView) mContent.findViewById(R.id.listViewCategory);
    Cursor cr = database.select("SELECT category_id, edesc, cdesc FROM category");
    mListItems = new CategoryModel[cr.getCount()];

    if (cr != null) {
        if (cr.moveToFirst()) {
            int i = 0;
            do {
                int categoryId = cr.getInt(cr.getColumnIndex("category_id"));
                String cdesc = cr.getString(cr.getColumnIndex("cdesc"));
                String edesc = cr.getString(cr.getColumnIndex("edesc"));
                mListItems[i] = new CategoryModel(categoryId, cdesc, edesc);
                i++;
            } while (cr.moveToNext());
        }
    }
    cr.close();

    CategoryAdapter mCategoryAdapter = new CategoryAdapter(mContext, mListItems);
    listViewCategory.setAdapter(mCategoryAdapter);

    mData = this.getIntent().getExtras();
    categoryId = mData.getInt("CategoryId");
}

解决方案

Finally I figured it out!!!

The original on touch listener I wrote has been fired three times, that's why it was unable to retrieve the actual return result.

Solved it by this --> Android: setting a spinner onClickListener()

private View.OnTouchListener Spinner_OnTouch = new View.OnTouchListener() {
    public boolean onTouch(View v, MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_UP) {

            if (v.getId() == R.id.spinnerCategory) {
                Bundle bundle = new Bundle();
                bundle.putInt("CategoryId", categoryId);
                Intent intent = new Intent(mContext, CreatePostActivity_Category.class);
                intent.putExtras(bundle);
                startActivityForResult(intent, Variables.CREATEPOST_CATEGORY_ACTIVITY_REQUEST_CODE);
            }
        }
        return true;
    }
};

Everything works. Thanks all for the suggested and correct answers.

这篇关于上的Andr​​oid活动结果总是返回0和空意图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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