相关疑难解决方法(0)

我正在使用一个AlarmManager触发广播信号的意图.以下是我的代码:

AlarmManager mgr = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(this, Wakeup.class);
try
{
    PendingIntent pi = PendingIntent.getBroadcast(this, 0, i, 0);
    Long elapsed +=  // sleep time;
    mgr.set(AlarmManager.RTC_WAKEUP, elapsed, pi);
}
catch(Exception r)
{
    Log.v(TAG, "RunTimeException: " + r);
}

我从一个调用这个代码Activity,所以我不知道如何得到以下错误...

ERROR/AndroidRuntime(7557): java.lang.RuntimeException: Unable to start receiver com.wcc.Wakeup: android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?

我使用asyncTask显示Dialog,然后几分钟后启动一个新活动.

不幸的是,活动在任务完成之前开始了???

package com.android.grad;

import android.app.Activity;

import android.app.ProgressDialog;

import android.os.AsyncTask;

import android.widget.Toast;

public class LoginTask extends AsyncTask<Void, Void, Boolean> {
private Activity activity;
private ProgressDialog pd;

public LoginTask(Activity activity) {
    this.activity = activity;
}

@Override
protected void onPreExecute() {
    pd = ProgressDialog.show(activity, "Signing in",
            "Please wait while we are signing you in..");
}

@Override
protected Boolean doInBackground(Void... arg0) {
    try {
        Thread.sleep(10000000);
    } catch (InterruptedException e) {
    }
    pd.dismiss();
    return true;
}

@Override
protected void onPostExecute(Boolean result) {
    Toast.makeText(activity, Boolean.toString(result), …