当子活动完成onActivityResult有时不叫 [英] onActivityResult sometimes not called when Sub-Activity finishes

问题描述

在测试过程中，我发现有时候我的子活动结束（）不执行onActivityResult。大多数时候它的工作好了，我想不通，何时，为何出现此问题。

子活动启动：

 公共无效launchSubActivity（类和LT ;?延伸活动＆GT; subActivityClass，捆绑数据，
        OnSubActivityResult回调）{

    意图I =新的意图（这一点，subActivityClass）;
    如果（数据！= NULL）i.putExtras（数据）;

    随机兰特=新的随机（）;
    INT的correlationID = rand.nextInt（）;

    _callbackMap.put（的correlationID，回调）;

    startActivityForResult（ⅰ，的correlationID）;

}
 

次级活动结束：

 公共无效选择（）{
    叠B =新包（）;
    b.putInt（年，year_result）;
    b.putInt（月，month_result）;
    b.putInt（日，day_result）;
    this.getIntent（）putExtras（b）中。;
    this.setResult（RESULT_OK，this.getIntent（））;
    this.finish（）;
}
 

onActivityResult（由纳兹穆尔伊德里斯）：

  / **
 *这是onActivityResult方法的基本实现，
 *处理自动生成correlationIds和添加/删除回调
 *仿函数来处理结果
 * /
@覆盖
保护无效onActivityResult（INT的correlationID，诠释结果code，
        意图数据）{

    Log.d（Prototype.TAG，SimpleActivity结果+结果code）;

    尝试 {
        OnSubActivityResult回调= _callbackMap.get（的correlationID）;

        开关（结果code）{
        案例Activity.RESULT_CANCELED：
            callback.onResultCancel（数据）;
            _callbackMap.remove（的correlationID）;
            打破;
        案例Activity.RESULT_OK：
            callback.onResultOkay（数据）;
            _callbackMap.remove（的correlationID）;
            打破;
        默认：
            Log.e（Prototype.TAG，
                    找不到回调处理的correlationID）;
        }
    }赶上（例外五）{
        登陆
                .E（Prototype.TAG，
                        从子活动问题处理结果，E）;
    }

}
 

解决方案

也许你有一个像杀活动标志或限制后台进程的一些开发商的选择。

进入设置 - >开发人员选项取消选中不保留活动和后台进程限制设置为标准限值

有关的额外信息，请查阅 http://stackoverflow.com/a/14195833/779408 和的http://stackoverflow.com/a/11522468/779408

During testing I noticed that sometimes the finish() of my sub-activity doesn't execute onActivityResult. Most of the times it works okay, and I can't figure out, when and why this problem occurs.

Subactivity start:

public void launchSubActivity(Class<? extends Activity> subActivityClass, Bundle data,
        OnSubActivityResult callback) {

    Intent i = new Intent(this, subActivityClass);
    if(data!=null) i.putExtras(data);

    Random rand = new Random();
    int correlationId = rand.nextInt();

    _callbackMap.put(correlationId, callback);

    startActivityForResult(i, correlationId);

}

Subactivity finish:

public void select() {
    Bundle b = new Bundle();
    b.putInt("YEAR", year_result);
    b.putInt("MONTH", month_result);
    b.putInt("DAY", day_result);
    this.getIntent().putExtras(b);
    this.setResult(RESULT_OK, this.getIntent());
    this.finish();
}

onActivityResult (by Nazmul Idris):

/**
 * this is the underlying implementation of the onActivityResult method that
 * handles auto generation of correlationIds and adding/removing callback
 * functors to handle the result
 */
@Override
protected void onActivityResult(int correlationId, int resultCode,
        Intent data) {

    Log.d(Prototype.TAG, "SimpleActivity Result "+resultCode);

    try {
        OnSubActivityResult callback = _callbackMap.get(correlationId);

        switch (resultCode) {
        case Activity.RESULT_CANCELED:
            callback.onResultCancel(data);
            _callbackMap.remove(correlationId);
            break;
        case Activity.RESULT_OK:
            callback.onResultOkay(data);
            _callbackMap.remove(correlationId);
            break;
        default:
            Log.e(Prototype.TAG,
                    "Couldn't find callback handler for correlationId");
        }
    } catch (Exception e) {
        Log
                .e(Prototype.TAG,
                        "Problem processing result from sub-activity", e);
    }

}

解决方案

Maybe you have some developer options like kill activity flag or limit background process.

Go to setting-> developer options unchecked Don't keep activities and Background process limit set to standard limit.

For extra information check http://stackoverflow.com/a/14195833/779408 and http://stackoverflow.com/a/11522468/779408

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