我正在开发一个使用闪屏的应用程序。但是在飞溅消失后，
下一个屏幕在切换到我的主要活动之前变黑，我不想要黑屏。谁能建议我如何做到这一点？这是我的代码。
启动器活动
public class MainActivity extends Activity{
public static final String TAG = "MainActivity";
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
Intent in = new Intent(getApplicationContext(), SplashScreenActivity.class);
synchronized (this) {
try {
wait(50);
} catch (InterruptedException e) {
String str = e.toString();
Log.d(TAG, str);
}//catch
}//synchronized block
startActivity(in);
}//onCreate
}//class
闪屏活动
public class SplashScreenActivity extends Activity {
private Thread splashThread;
public static final String TAG = "SplashScreenActivity";
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
final SplashScreenActivity splashScreen = this;
splashThread = new Thread(){
public void run(){
try {
synchronized (this) {
wait(3000);
}
} catch (Exception e) {
String str = e.toString();
Log.d(TAG, str);
}
finish();
Intent in = new Intent();
in.setClass(splashScreen, ProjectActivity.class);
startActivity(in);
stop();
}//run
};
splashThread.start();
}//onCreate
}//class
项目活动 这是主要操作将从中开始的类。
public class ProjectActivity extends TabActivity {
static int x=0;
static int color;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.tabxml);
if(x==1)
{
Dor.c=1;
color = getIntent().getExtras().getInt("color");
//Intent in=new Intent();
//in.putExtra("color",color);
}
Resources res = getResources(); // Resource object to get Drawables
TabHost tabHost = getTabHost(); // The activity TabHost
TabHost.TabSpec spec; // Resusable TabSpec for each tab
Intent intent; // Reusable Intent for each tab
// Create an Intent to launch an Activity for the tab (to be reused)
intent = new Intent().setClass(this, Dor.class);
// Initialize a TabSpec for each tab and add it to the TabHost
spec = tabHost.newTabSpec("dor").setIndicator("Dor",
res.getDrawable(R.drawable.ic_tab_artists))
.setContent(intent);
tabHost.addTab(spec);
// Do the same for the other tabs
intent = new Intent().setClass(this, Album.class);
spec = tabHost.newTabSpec("albums").setIndicator("Albums",
res.getDrawable(R.drawable.ic_tab_album)
.setContent(intent);
tabHost.addTab(spec);
intent = new Intent().setClass(this, Forhandler.class);
spec = tabHost.newTabSpec("forhandler").setIndicator("Forhandler",
res.getDrawable(R.drawable.ic_tab_forhandler))
.setContent(intent);
tabHost.addTab(spec);
intent = new Intent().setClass(this, Diplomat.class);
spec = tabHost.newTabSpec("diplomat").setIndicator("Diplomat",
res.getDrawable(R.drawable.ic_tab_diplomat))
.setContent(intent);
tabHost.addTab(spec);
tabHost.setCurrentTab(0);
}
}
我尝试了异步任务，但没有奏效。这是我修改后的代码：
项目启动
public class ProjectStart extends AsyncTask<Context, Void, Void>{
public static final String TAG = "ProjectStart";
/*public ProjectStart() {
super("ProjectStart");
// TODO Auto-generated constructor stub
}*/
Context ctx;
public ProjectStart(Context context){
this.ctx = context;
}//constructor
@Override
protected Void doInBackground(Context... params) {
// TODO Auto-generated method stub
Intent in = new Intent();
in.setClass(ctx, ProjectActivity.class);
Log.d(TAG, "doInBackground called");
return null;
}//doInBackground
/*@Override
protected void onHandleIntent(Intent intent) {
// TODO Auto-generated method stub
Intent in = new Intent();
in.setClass(getApplicationContext(), ProjectActivity.class);
startActivity(in);
Log.d("Project Start", "onHandleIntentCalled");
}*/
}//班级
在 SplashScreen.java 我做了以下修改
splashThread = new Thread() {
public void run(){
try {
synchronized (this) {
wait(3000);
}//synchronized
}//try
catch(InterruptedException e) {}
finally {
finish();
new ProjectStart(sPlashScreen).execute();
/*Intent in = new Intent(getApplicationContext(), ProjectStart.class);
startService(in);*/
stop();
}//finally
Log.d(TAG, "run method called");
}//run
};
而且，这是堆栈跟踪：
04-19 11:29:02.181: E/AndroidRuntime(341): FATAL EXCEPTION: Thread-8
04-19 11:29:02.181: E/AndroidRuntime(341): java.lang.ExceptionInInitializerError
04-19 11:29:02.181: E/AndroidRuntime(341): at abc.com.camera.SplashScreen$1.run(SplashScreen.java:32)
04-19 11:29:02.181: E/AndroidRuntime(341): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
04-19 11:29:02.181: E/AndroidRuntime(341): at android.os.Handler.<init>(Handler.java:121)
04-19 11:29:02.181: E/AndroidRuntime(341): at android.os.AsyncTask$InternalHandler.<init>(AsyncTask.java:421)
04-19 11:29:02.181: E/AndroidRuntime(341): at android.os.AsyncTask$InternalHandler.<init>(AsyncTask.java:421)
04-19 11:29:02.181: E/AndroidRuntime(341): at android.os.AsyncTask.<clinit>(AsyncTask.java:152)
04-19 11:29:02.181: E/AndroidRuntime(341): ... 1 more
04-19 11:29:02.181: E/AndroidRuntime(341): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
我没有得到什么问题。