mediaplayer 및 viewpager를 사용하여 사운드 파일을 재생하려고하지만 작동하지 않습니다. 오류 메시지가 표시됩니다.사용자 이벤트의 사운드 파일 재생
"Unfortunately, the process horizontalviewpaging has stopped"
(페이지 스 와이 핑 및 클릭 이벤트) 어떻게이 문제를 해결할 수 있습니까?
package ro.ovidiuconeac.horizontalviewswiping;
import ro.ovidiuconeac.horizontalviewswiping.R;
import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class CustomPageChangeListener extends Activity implements OnPageChangeListener, OnClickListener {
private MediaPlayer soundplay = null;
@SuppressWarnings("unused")
public void onCreate(Bundle savedInstanceState) {
// load layout
super.onCreate(savedInstanceState);
setContentView(R.layout.page_1);
MediaPlayer soundplay=MediaPlayer.create(this, R.raw.catsound);
}
private Button buttonBlue = null;
private Button buttonYellow = null;
private Button buttonRed = null;
private Activity context = null;
/**
* Constructor
*/
public CustomPageChangeListener(Activity context) {
this.context = context;
}
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
public void onPageSelected(int position) {
switch (position) {
case 0 : {
ButtonBlue = (Button) context.findViewById(R.id.buttonBlue);
buttonBlue.setOnClickListener(this);
soundplay.start();
break;
}
case 1 : {
buttonYellow = (Button) context.findViewById(R.id.buttonYellow);
buttonYellow.setOnClickListener(this);
soundplay.start();
break;
}
case 2 : {
buttonRed = (Button) context.findViewById(R.id.buttonRed);
buttonRed.setOnClickListener(this);
soundplay.start();
break;
}
}
}
public void onClick(View v) {
// Click button blue
if (buttonBlue != null && v.getId() == buttonBlue.getId()) {
Toast.makeText(context, "Blue screen", Toast.LENGTH_SHORT).show();
soundplay.start();
}
// Click button yellow
if (buttonYellow != null && v.getId() == buttonYellow.getId()) {
Toast.makeText(context, "Yellow screen", Toast.LENGTH_SHORT).show();
soundplay.start();
}
// Click button red
if (buttonRed != null && v.getId() == buttonRed.getId()) {
Toast.makeText(context, "Red screen", Toast.LENGTH_SHORT).show();
soundplay.start();
}
}
}
이 질문에 대한 추가 정보 인 '답변'에서 편집되었습니다.
> 09-01 08:38:04.964: E/AndroidRuntime(631): FATAL EXCEPTION: main
> 09-01 08:38:04.964: E/AndroidRuntime(631): java.lang.NullPointerException
> 09-01 08:38:04.964: E/AndroidRuntime(631): at android.content.ContextWrapper.getApplicationContext(ContextWrapper.java:101)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at ro.ovidiuconeac.horizontalviewswiping.CustomPageChangeListener.onClick(CustomPageChangeListener.java:80)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at android.view.View.performClick(View.java:4084)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at android.view.View$PerformClick.run(View.java:16966)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at android.os.Handler.handleCallback(Handler.java:615)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at android.os.Handler.dispatchMessage(Handler.java:92)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at android.os.Looper.loop(Looper.java:137)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at android.app.ActivityThread.main(ActivityThread.java:4745)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at java.lang.reflect.Method.invokeNative(Native Method)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at java.lang.reflect.Method.invoke(Method.java:511)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
> 09-01 08:38:04.964: E/AndroidRuntime(631): at dalvik.system.NativeStart.main(Native Method)
코드가 변경되었지만 작동하지 않습니다.
package ro.ovidiuconeac.horizontalviewswiping;
import ro.ovidiuconeac.horizontalviewswiping.R;
import android.app.Activity;
import android.media.MediaPlayer;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class CustomPageChangeListener extends Activity implements OnPageChangeListener, OnClickListener {
MediaPlayer soundplay;
private Button buttonBlue = null;
private Button buttonYellow = null;
private Button buttonRed = null;
private Activity context = null;
/**
* Constructor
*/
public CustomPageChangeListener(Activity context) {
this.context = context;
}
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
public void onPageSelected(int position) {
switch (position) {
case 0 : {
buttonBlue = (Button) context.findViewById(R.id.buttonBlue);
buttonBlue.setOnClickListener(this);
break;
}
case 1 : {
buttonYellow = (Button) context.findViewById(R.id.buttonYellow);
buttonYellow.setOnClickListener(this);
break;
}
case 2 : {
buttonRed = (Button) context.findViewById(R.id.buttonRed);
buttonRed.setOnClickListener(this);
break;
}
}
}
public void onClick(View v) {
// Click button blue
if (buttonBlue != null && v.getId() == buttonBlue.getId()) {
Toast.makeText(context, "Blue screen", Toast.LENGTH_SHORT).show();
}
// Click button yellow
if (buttonYellow != null && v.getId() == buttonYellow.getId()) {
// Toast.makeText(context, "Yellow screen", Toast.LENGTH_SHORT).show();
playMusic();
}
// Click button red
if (buttonRed != null && v.getId() == buttonRed.getId()) {
Toast.makeText(context, "Red screen", Toast.LENGTH_SHORT).show();
}
}
public void playMusic() {
soundplay = new MediaPlayer();
try {
soundplay = MediaPlayer.create(getApplicationContext(), R.raw.bangyeni);
soundplay.setVolume(1, 1);
soundplay.start();
}
catch (Exception e){
Toast.makeText(context, "Error", Toast.LENGTH_SHORT).show();
}
}
}
게시물 관련 LogCat 출력 –
LogCat 오류 로그를 공유하면 더 잘 도와 드릴 수 있습니다. – JRaymond
잊어 버렸을 때 대답을 수락 해주십시오. – WIllJBD