Question

我正在开发一个应用程序，其中我使用了启动画面。但是在飞溅消失之后，然后是在切换到我的主要活动之前，下一个屏幕变黑，我不想要黑屏。任何人都可以建议我怎么做？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

SplashScreenAcitvity

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);
}
}

我尝试过异步任务但是没有用。这是我修改过的代码：

ProjectStart

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");
}*/

} //类

在SplashScreen.java中，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。

Answer 1

但是在飞溅消失后，屏幕在切换之前会变黑到我的主要活动

您似乎可能正在MainActivity的UI上执行一些后台处理，这需要时间来完成后台处理。如果是这样的话，使用

的AsyncTask
服务
IntentService

用于后台处理。如果不是，则显示主活动它有什么代码。

Answer 2

您可以在以下链接中找到有关更多帮助的教程：

http://p-xr.com/android-tutorial-how-to-make-a-basic-splash-screen/

http://www.codeproject.com/Articles/113831/An-Advanced-Splash-Screen-for-Android-App

谢谢..！

Answer 3

我认为最佳解决方案是asynctask

鉴于开发人员网站的一个例子。 Asynctask主要有四种方法。

onPreExecute()

doInBackground(Params...)

onProgressUpdate(Progress...)

onPostExecute(Result)

这是其他Example。

Answer 4

为您的活动意图添加一个标志.. setFlags（Intent.FLAG_ACTIVITY_NO_ANIMATION）

在android中的启动画面后出现黑屏

4 个答案: