我在开发一块下单送货软件的时候遇到的这个问题.场景描述,用户从首页选择里订单,进入了订单确认页面,确认后进入了选择支付页面,支付成功以后需要返回首页.如何在进入首页的时候清除堆栈里所有的Activity?说说有效的方法吧.FLAG_ACTIVITY_CLEAR_TOP1
2Intent intent = new Intent(A.this,B.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
看看里面的安卓源码1
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8/**
* If set in an Intent passed to {@link Context#startActivity Context.startActivity()},
* this flag will cause any existing task that would be associated with the
* activity to be cleared before the activity is started. That is, the activity
* becomes the new root of an otherwise empty task, and any old activities
* are finished. This can only be used in conjunction with {@link #FLAG_ACTIVITY_NEW_TASK}.
*/
public static final int FLAG_ACTIVITY_CLEAR_TASK = 0X00008000;
源码中明确说明如果在startActivity的时候传递FLAG_ACTIVITY_CLEAR_TASK这个标志,那么这个标志将会清除之前所有已经打开的activity.然后将会变成另外一个空栈的root,然后其他的Activitys就都被关闭了.这个方法必须跟着{@link #FLAG_ACTIVITY_NEW_TASK}一起使用.
