Android开发线程问题

Question

I am making an android app in eclipse my problem is that every time I run it on my emulator it closes after 5 seconds and gives me a message “Unfortunately, 'app name' has stopped working”. I think this is due to the thread that brings up a picture I put in the drawable-hdpi folder because the thread is meant to bring up the picture for 5 seconds then start the program. Any help is greatly appreciated.

package com.thenewboston.travis;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;

public class Splash extends Activity{

@Override
protected void onCreate(Bundle t) {
    // TODO Auto-generated method stub
    super.onCreate(t);
    setContentView(R.layout.splash);
 new Thread(){
        public void run(){
            try{
            sleep(5000);
            }catch(Exception e){
                e.printStackTrace();
            }finally{
                Intent openStartingPoint= new Intent("com.thenewboston.travis.STARTINGPOINT");
                startActivity(openStartingPoint);
            }
        }
    }.start(); }}

The Android Manifest Code

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.thenewboston.travis"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="18" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.thenewboston.travis.Splash"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name="com.thenewboston.travis.startingPoint"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>


</application>

</manifest>

And this is my splash file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" 
android:background="@drawable/yaron_dynamics">


</LinearLayout>

Answer 1

您不能在与UI线程不同的线程中启动startActivity

Answer 2

You can't launch an Activity from a background thread. Instead of a thread, use a Handler :

Runnable r = new Runnable() {
   public void run() {
       Intent i = new Intent("com.thenewboston.travis.STARTINGPOINT");
       startActivity(i);
   }
};

new Handler().postDelayed(r, 5000);