このスプラッシュ画面で始まる Android プロジェクトを開発しています。プロジェクトは、タブレット以外のエミュレーターと実際のデバイスでスムーズに動作します。
package com.example.project;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Window;
import android.view.WindowManager;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.TextView;
public class Splashscreen extends Activity
{
private static String TAG=Splashscreen.class.getName();
private static long SLEEP_TIME=6;
TextView tv;
ImageView iv;
@Override
protected void onCreate(Bundle savedInstanceState)
{
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.splash1);
TranslateAnimation translate = new TranslateAnimation(Animation.RELATIVE_TO_PARENT,0,Animation.RELATIVE_TO_PARENT,0,Animation.ABSOLUTE,250,Animation.ABSOLUTE,0);
translate.setDuration(3000);
translate.reset();
translate.setFillAfter(true);
tv=(TextView)findViewById(R.id.tt1);
tv.startAnimation(translate);
iv=(ImageView)findViewById(R.id.i1);
Animation anim1= new AlphaAnimation(1, 0);
anim1.setDuration(1000);
anim1.setInterpolator(new LinearInterpolator());
anim1.setRepeatCount(1);
anim1.setRepeatMode(Animation.REVERSE);
iv.startAnimation(anim1);
IntentLauncher launcher=new IntentLauncher();
launcher.start();
}
private class IntentLauncher extends Thread
{
public void run()
{
try{
Thread.sleep(SLEEP_TIME*1000);
}catch(Exception e)
{
Log.e(TAG,e.getMessage());
}
Intent i=new Intent(Splashscreen.this,Login_or_up.class);
Splashscreen.this.startActivity(i);
Splashscreen.this.finish();
}
}
}
logCat に表示されるエラーは次のとおりです。
02-19 18:04:45.434: D/AndroidRuntime(613): Shutting down VM
02-19 18:04:45.454: W/dalvikvm(613): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
02-19 18:04:45.464: E/AndroidRuntime(613): FATAL EXCEPTION: main
02-19 18:04:45.464: E/AndroidRuntime(613): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.project/com.example.project.Splashscreen}: java.lang.NullPointerException
02-19 18:04:45.464: E/AndroidRuntime(613): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
02-19 18:04:45.464: E/AndroidRuntime(613): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
02-19 18:04:45.464: E/AndroidRuntime(613): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
02-19 18:04:45.464: E/AndroidRuntime(613): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
02-19 18:04:45.464: E/AndroidRuntime(613): at android.os.Handler.dispatchMessage(Handler.java:99)
02-19 18:04:45.464: E/AndroidRuntime(613): at android.os.Looper.loop(Looper.java:123)
02-19 18:04:45.464: E/AndroidRuntime(613): at android.app.ActivityThread.main(ActivityThread.java:4627)
02-19 18:04:45.464: E/AndroidRuntime(613): at java.lang.reflect.Method.invokeNative(Native Method)
02-19 18:04:45.464: E/AndroidRuntime(613): at java.lang.reflect.Method.invoke(Method.java:521)
02-19 18:04:45.464: E/AndroidRuntime(613): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
02-19 18:04:45.464: E/AndroidRuntime(613): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
02-19 18:04:45.464: E/AndroidRuntime(613): at dalvik.system.NativeStart.main(Native Method)
02-19 18:04:45.464: E/AndroidRuntime(613): Caused by: java.lang.NullPointerException
02-19 18:04:45.464: E/AndroidRuntime(613): at com.example.project.Splashscreen.onCreate(Splashscreen.java:38)
02-19 18:04:45.464: E/AndroidRuntime(613): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-19 18:04:45.464: E/AndroidRuntime(613): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
02-19 18:04:45.464: E/AndroidRuntime(613): ... 11 more
02-19 18:04:47.394: I/Process(613): Sending signal. PID: 613 SIG: 9
この問題を解決するために私を助けてください。