特定の一時停止後に自動的に更新される画像スライドショーを設定しようとしています。Handler と timer クラスを使用して実装しようとしました。しかし、うまくいきません。私を助けてください。
コード：
import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.Gallery.LayoutParams;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher;
public class MainActivity extends Activity implements
AdapterView.OnItemSelectedListener, ViewSwitcher.ViewFactory {
@Override
public void onCreate(Bundle savedInstanceState) {
final Handler mHandler = new Handler();
int delay = 1000;
int pause = 5000;
Timer timer = new Timer();
timer.schedule(new TimerTask(){
@Override
public void run() {
// TODO Auto-generated method stub
int position = 0;
mSwitcher.setImageResource(mImageIds[position]);
position++;
}
}, delay, pause);
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
mSwitcher = (ImageSwitcher) findViewById(R.id.switcher);
mSwitcher.setFactory(this);
mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_in));
mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_out));
Gallery g = (Gallery) findViewById(R.id.gallery);
g.setAdapter(new ImageAdapter(this));
g.setOnItemSelectedListener(this);
}
public void onItemSelected(AdapterView parent, View v, int position, long id) {
mSwitcher.setImageResource(mImageIds[position]);
}
public void onNothingSelected(AdapterView parent) {
}
public View makeView() {
ImageView i = new ImageView(this);
i.setBackgroundColor(0xFF000000);
i.setScaleType(ImageView.ScaleType.FIT_CENTER);
i.setLayoutParams(new ImageSwitcher.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
return i;
}
private ImageSwitcher mSwitcher;
public class ImageAdapter extends BaseAdapter {
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(mContext);
i.setImageResource(mThumbIds[position]);
i.setAdjustViewBounds(true);
i.setLayoutParams(new Gallery.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
i.setBackgroundResource(R.drawable.ic_launcher);
return i;
}
private Context mContext;
}
private Integer[] mThumbIds = { R.drawable.image1, R.drawable.image2, R.drawable.image3, R.drawable.image4, R.drawable.image5 };
enter code here
private Integer[] mImageIds = { R.drawable.image1,
R.drawable.image2, R.drawable.image3, R.drawable.image4, R.drawable.image5};
}
XML コード:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageSwitcher
android:id="@+id/switcher"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />
<Gallery
android:id="@+id/gallery"
android:layout_width="fill_parent"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:background="#55000000"
android:gravity="center_vertical"
android:spacing="16dp" />
</RelativeLayout>
ログキャット:
06-17 12:13:28.418: D/dalvikvm(357): GC_EXTERNAL_ALLOC freed 910 objects / 62408 bytes in 46ms
06-17 12:13:29.428: D/dalvikvm(357): GC_EXTERNAL_ALLOC freed 268 objects / 12480 bytes in 38ms
06-17 12:13:29.758: W/dalvikvm(357): threadid=7: thread exiting with uncaught exception (group=0x4001d800)
06-17 12:13:29.758: E/AndroidRuntime(357): FATAL EXCEPTION: Timer-0
06-17 12:13:29.758: E/AndroidRuntime(357): android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
06-17 12:13:29.758: E/AndroidRuntime(357): at android.view.ViewRoot.checkThread(ViewRoot.java:2802)
06-17 12:13:29.758: E/AndroidRuntime(357): at android.view.ViewRoot.focusableViewAvailable(ViewRoot.java:1596)
06-17 12:13:29.758: E/AndroidRuntime(357): at android.view.ViewGroup.focusableViewAvailable(ViewGroup.java:451)
06-17 12:13:29.758: E/AndroidRuntime(357): at android.view.ViewGroup.focusableViewAvailable(ViewGroup.java:451)
06-17 12:13:29.758: E/AndroidRuntime(357): at android.view.ViewGroup.focusableViewAvailable(ViewGroup.java:451)
06-17 12:13:29.758: E/AndroidRuntime(357): at android.view.ViewGroup.focusableViewAvailable(ViewGroup.java:451)
06-17 12:13:29.758: E/AndroidRuntime(357): at android.view.View.setFlags(View.java:4493)
06-17 12:13:29.758: E/AndroidRuntime(357): at android.view.View.setVisibility(View.java:3030)
06-17 12:13:29.758: E/AndroidRuntime(357): at android.widget.ViewAnimator.showOnly(ViewAnimator.java:146)
06-17 12:13:29.758: E/AndroidRuntime(357): at android.widget.ViewAnimator.setDisplayedChild(ViewAnimator.java:102)
06-17 12:13:29.758: E/AndroidRuntime(357): at android.widget.ViewAnimator.showNext(ViewAnimator.java:120)
06-17 12:13:29.758: E/AndroidRuntime(357): at android.widget.ImageSwitcher.setImageResource(ImageSwitcher.java:42)
06-17 12:13:29.758: E/AndroidRuntime(357): at com.example.slideshow.MainActivity$1.run(MainActivity.java:37)
06-17 12:13:29.758: E/AndroidRuntime(357): at java.util.Timer$TimerImpl.run(Timer.java:289)
06-17 12:13:46.839: I/Process(357): Sending signal. PID: 357 SIG: 9