Question

我有2项活动，家长活动开始儿童活动。当我们进入Child Activity时，用户通过菜单中的“Up”-Button关闭它，并返回到Parent Activity。

基本代码摘要：

家长（主要）活动：

protected static final int TIMERCHOOSER_REQUEST = 1;

开始新活动（从菜单按钮调用）：

private void openTimerChooser() {
        Intent intent = new Intent(this, TimerChooserActivity.class);
        startActivityForResult(intent,TIMERCHOOSER_REQUEST);
    }

并获取结果：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode,resultCode,data);

    Log.d("Main", "called onActivityResult");  //this and below is never executed
    if (requestCode == TIMERCHOOSER_REQUEST) {
        switch(resultCode) {
            case RESULT_CANCELED:
                Log.d("Main", "Intent result was canceled by TIMERCHOOSER");
            case RESULT_OK:
                //code to handle data from TIMERCHOOSER_REQUEST
                Log.d("Main", "accepted resultCode. value: "+resultCode);
                String result = data.getStringExtra("result");
                Toast toast = Toast.makeText(getApplicationContext(),result,Toast.LENGTH_SHORT);
                toast.show();
            default:
                Log.d("Main", "invalid/unhandled resultCode? value: "+resultCode);
        }
    }
    else
        Log.d("Main", "invalid/unhandled requestCode? value: "+requestCode);
}

子活动（“TimerChooserActivity”）：

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    switch(id) {
        case R.id.action_settings:
            return true;
        case android.R.id.home:
            Log.d("TimerChooser", "finishing intent");
            Intent returnIntent = new Intent();
            returnIntent.putExtra("result", "Some result");
            /*if(result == "User activated textview")
                setResult(RESULT_OK,returnIntent);
            else
                setResult(RESULT_CANCELED,returnIntent);*/
            setResult(RESULT_OK,returnIntent);
            finish();
        default:
            return super.onOptionsItemSelected(item);
    }
}

您可以通过菜单/操作栏中的主页/向上按钮返回到Parent（Maint）活动。这有效。但是，无论我设置什么样的结果，都不会调用onActivityResult()。

我的清单中也没有奇怪的标签。只是标准的东西：

android:allowBackup
android:icon
android:label
android:theme
android:name
android:parentActivityName
android:value

发生了什么事？

Answer 1

在你的android.R.id.home案例中，你没有返回一个值，而是你正在进入默认情况

我的onActivityResult（）永远不会被调用

1 个答案: