问题
I am trying to implement a Splash Screen using this java and xml code. I created a separate java class from my main activity and placed the java code inside. I created an xml layout in my layout file and placed the xml code inside. However, my app appears normally without a splash screen. It never shows, but the app does not have any errors. Eclipse is not showing any errors either. What could be the cause to this? Thank you in advance. Here is the code.
Java:
package com.carouseldemo.main;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.Menu;
public class Splash extends Activity {
private final int SPLASH_DISPLAY_LENGHT = 1000;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.splash);
/* New Handler to start the Menu-Activity
* and close this Splash-Screen after some seconds.*/
new Handler().postDelayed(new Runnable(){
@Override
public void run() {
/* Create an Intent that will start the Menu-Activity. */
Intent mainIntent = new Intent(Splash.this,Menu.class);
Splash.this.startActivity(mainIntent);
Splash.this.finish();
}
}, SPLASH_DISPLAY_LENGHT);
}
}
XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView android:id="@+id/splashscreen" android:layout_width="wrap_content"
android:layout_height="fill_parent" android:src="@drawable/cat"
android:layout_gravity="center"/>
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:text="Hello World, splash"/>
</LinearLayout>
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.carouseldemo.main"
android:versionCode="1"
android:versionName="1.0"
>
<uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" android:screenOrientation="portrait"/>
<application android:icon="@drawable/buttonone" android:label="@string/app_name">
<activity android:name=".MainActivity" android:label="@string/app_name" android:screenOrientation="portrait" android:configChanges="orientation|keyboardHidden" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
回答1:
MainActivity is launcher activity in manifest file. So, splash is not showing.
Change the launcher activity MainActivity to Splash and write another for MainActivity.
<application android:icon="@drawable/buttonone" android:label="@string/app_name">
<activity android:name=".Splash" android:label="@string/app_name" android:screenOrientation="portrait" android:configChanges="orientation|keyboardHidden" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity" />
</application>
回答2:
Replace the Handler part with this :
Thread splashThread = new Thread() {
public void run() {
try {
Thread.sleep(SPLASH_DISPLAY_LENGHT);
} catch (Exception e) {
} finally {
Intent i = new Intent(Splash.this,Menu.class);
startActivity(i);
finish();
}
}
};
splashThread.start();
回答3:
private static final int STOPSPLASH = 0;
private static final long SPLASHTIME =3000;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.splash);
context = getApplicationContext();
if(savedInstanceState == null){
Message msg = new Message();
msg.what = STOPSPLASH;
spHandler.sendMessageDelayed(msg, SPLASHTIME);
}
}
private Handler spHandler = new Handler() {
@Override
public void handleMessage(Message msg)
{
switch (msg.what)
{
case STOPSPLASH:
gotoHomeScreen();
break;
default:
break;
}
super.handleMessage(msg);
}
};
public void gotoHomeScreen(){
Intent i = new Intent();
i.setClass(Splash.this,Home.class);
startActivity(i);
finish();
spHandler = null;
}
try this.
in your manifest
<activity android:name="Splash" android:configChanges="keyboardHidden" android:theme="@android:style/Theme.NoTitleBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
回答4:
Try out as below :
public class Splash extends Activity { private final int SPLASH_DISPLAY_LENGHT = 1000; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.splash); new Thread(){ public void run() { try { sleep(SPLASH_DISPLAY_LENGHT); Intent mainIntent = new Intent(Splash.this,Menu.class); Splash.this.startActivity(mainIntent); Splash.this.finish(); } catch (InterruptedException e) { e.printStackTrace(); } }; }.start(); }
EDITED:
<activity android:name=".Splash" android:label="@string/app_name" android:screenOrientation="portrait" android:configChanges="orientation|keyboardHidden" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity>
回答5:
Another way to achieve using CountDownTimer
public class MyCounter extends CountDownTimer {
public MyCounter(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
}
@Override
public void onFinish() {
startActivity(new Intent(SplashScreen.this,
TabSample.class));
finish();
MCObject.cancel();
}
@Override
public void onTick(long millisUntilFinished) {
}
}
Within OnCreate
MyCounter MCObject;
MCObject = new MyCounter(3000, 100);
MCObject.start();
回答6:
Use this code, it might help you.
public class SplashScreenActivity extends Activity {
protected int _splashTime = 2000;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash_screen);
Thread splashTread = new Thread() {
@Override
public void run() {
try {
sleep(_splashTime);
}
} catch (InterruptedException e) {
// do nothing
} finally {
startActivity(new Intent(SplashScreenActivity.this,
MainActivity.class));
SplashScreenActivity.this.finish();
}
}
};
splashTread.start();
}
Hope it will help you.
回答7:
Replace your handler
new Thread(new Runnable() {
public void run() {
try {
Thread.sleep(SPLASH_TIME);
startActivity(intent);
finish();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
来源：https://stackoverflow.com/questions/14722035/splash-screen-will-not-display