如何在特定时间段后开始活动? [英] How to start an activity after certain time period?

问题描述

我需要在特定时间段后从当前活动开始一项活动.我编码如下.

i need to start an activity from the current activity after a certain time period. I coded like below.

public class FirstActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_first);


    new Timer().schedule(new TimerTask(){
        public void run() { 
            startActivity(new Intent(FirstActivity.this, SecondActivity.class));
        }
    }, 2000); 
}

但它不起作用..它一直崩溃..我的方法正确吗?我的清单文件如下

But its not working..it keeps on crashing.. Is my method correct? my manifest file is as below

`

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="15" />

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".FirstActivity"
        android:label="@string/title_activity_first" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".SecondActivity"
        android:label="@string/title_activity_second" >
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value="com.example.first.FirstActivity" />
    </activity>
</application>

推荐答案

可以使用Handler类的postDelayed()方法来执行这个:

You can use the Handler class postDelayed() method to perform this:

Handler mHandler = new Handler();
mHandler.postDelayed(new Runnable() {

    @Override
    public void run() {
        //start your activity here  
    }

}, 1000L);

其中 1000L 是 Runnable 类中的代码之后的时间(以毫秒为单位)将被调用.

Where 1000L is the time in milliseconds after which the code within the Runnable class will be called.

尝试使用这个.

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