package com.example.broadcastbestpractice;
import android.app.AlertDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.view.WindowManager;
public class ForceOfflineReceiver extends BroadcastReceiver {
public void onReceive(final Context context, Intent intent) {
// TODO Auto-generated method stub
AlertDialog.Builder dialogBuilder=new AlertDialog.Builder(context);
dialogBuilder.setTitle("Warning");
dialogBuilder.setMessage("你被强制下线了，请重新登录！！");
dialogBuilder.setCancelable(false);
dialogBuilder.setPositiveButton("OK",new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
ActivityCollector.finishAll();
Intent intent=new Intent(context,LoginActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent); //为什么要调用context来启动呢？
}
});
AlertDialog alertDialog=dialogBuilder.create();
alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
alertDialog.show();
}
}
就是后面为什么要通过context.startActivity(intent); 来启动活动呢？为什么不可以直接通过startActivity(intent)来启动，原因是什么？
