按下android中的按钮后如何启动一个不同的活动？

Question

I want that a new activity should start with some delay on pressing a button. Is it possible to do that , and whats the procedure.

Answer 1

Use a postDelayed() call with a runnable that launches your activity. An example code could be

    //will care for all posts
    Handler mHandler = new Handler();

    //the button's onclick method
    onClick(...)
    {
        mHandler.postDelayed(mLaunchTask,MYDELAYTIME);
    }

    //will launch the activity
    private Runnable mLaunchTask = new Runnable() {
        public void run() {
            Intent i = new Intent(getApplicationContext(),MYACTIVITY.CLASS);
            startActivity(i);
        }
     };

Note that this lets the interface remain reactive. You should then care for removing the onclick listener from your button.

Answer 2

You could call a Runnable using the Handler postDelayed() method.

Here's an example (http://developer.android.com/resources/articles/timed-ui-updates.html):

private Handler mHandler = new Handler();

...

OnClickListener mStartListener = new OnClickListener() {
   public void onClick(View v) {
            mHandler.postDelayed(mUpdateTimeTask, 100);
   }
};

private Runnable mUpdateTimeTask = new Runnable() {
   public void run() {
       // do what you need to do here after the delay
   }
};

Props to @mad for getting it right the first time around.

Answer 3

Use This code

new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            final Intent mainIntent = new Intent(CurrentActivity.this, SecondActivity.class);
            LaunchActivity.this.startActivity(mainIntent);
            LaunchActivity.this.finish();
        }
    }, 4000);

Answer 4

您可以使用该方法postDelayed(Runnable action, long delayMillis)上View到添加Runnable到消息队列的（近似）的延迟后运行。

Answer 5

Sometimes, u need to do it whenever your app process is killed or not. In that case you can not use handling runnable or messages inside your process. In this case your can just use AlarmManager to this. Hope this example helps anybody:

Intent intent = new Intent();
...

PendingIntent pendingIntent = PendingIntent.getActivity(<your context>, 0, intent, PendingIntent.FLAG_ONE_SHOT);
AlarmManager mgr = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
mgr.set(AlarmManager.RTC, <your delay>, pendingIntent);

Answer 6

runOnUiThread(new Runnable() {
        @Override
        public void run() {
            new Handler().postDelayed(new Runnable(){
                @Override
                public void run() {
                    Intent intent = new Intent(getApplicationContext(), MainActivity.class);
                    startActivity(intent);
                }
            }, 4000);
        }
    });

Answer 7

try this piece of code

new Timer().schedule(new TimerTask() {          
    @Override
    public void run() {

        // run AsyncTask here.    


    }
 }, 3000);