Я настоящий начинающий разработчик Android. Я пытаюсь запустить метод для воспроизведения аудиофайла, но я получаю «неудачное» имя приложения «остановился», когда я его открываю.К сожалению, ваше приложение остановлено
Вот журнал ошибок:
FATAL EXCEPTION: main
Process: com.androiddevbook.onyourbike.chapter4, PID: 21393
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:3823)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invoke(Native Method): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.view.View$1.onClick(View.java:3818)
... 9 more
Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.androiddevbook.onyourbike.chapter4/com.androiddevbook.onyourbike.chapter4.Media}; have you declared this activity in your AndroidManifest.xml?
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1628)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
at android.app.Activity.startActivityForResult(Activity.java:3424)
at android.app.Activity.startActivityForResult(Activity.java:3385)
at android.app.Activity.startActivity(Activity.java:3627)
at android.app.Activity.startActivity(Activity.java:3595)
at com.androiddevbook.onyourbike.chapter4.TimerActivity.clickedMusic(TimerActivity.java:178)
... 11 more
А класс Java:
package com.androiddevbook.onyourbike.chapter4;
import java.util.concurrent.TimeUnit;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import com.androiddevbook.onyourbike.chapter4.R;
public class Media extends Activity {
public TextView songName,startTimeField,endTimeField;
private MediaPlayer mediaPlayer;
private double startTime = 0;
private double finalTime = 0;
private Handler myHandler = new Handler();;
private int forwardTime = 5000;
private int backwardTime = 5000;
private SeekBar seekbar;
private ImageButton playButton,pauseButton;
public static int oneTimeOnly = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_media);
songName = (TextView)findViewById(R.id.textView4);
startTimeField =(TextView)findViewById(R.id.textView1);
endTimeField =(TextView)findViewById(R.id.textView2);
seekbar = (SeekBar)findViewById(R.id.seekBar1);
playButton = (ImageButton)findViewById(R.id.imageButton1);
pauseButton = (ImageButton)findViewById(R.id.imageButton2);
songName.setText("song.mp3");
mediaPlayer = MediaPlayer.create(this, R.raw.song);
seekbar.setClickable(false);
pauseButton.setEnabled(false);
}
public void play(View view){
Toast.makeText(getApplicationContext(), "Playing sound",
Toast.LENGTH_SHORT).show();
mediaPlayer.start();
finalTime = mediaPlayer.getDuration();
startTime = mediaPlayer.getCurrentPosition();
if(oneTimeOnly == 0){
seekbar.setMax((int) finalTime);
oneTimeOnly = 1;
}
endTimeField.setText(String.format("%d min, %d sec",
TimeUnit.MILLISECONDS.toMinutes((long) finalTime),
TimeUnit.MILLISECONDS.toSeconds((long) finalTime) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.
toMinutes((long) finalTime)))
);
startTimeField.setText(String.format("%d min, %d sec",
TimeUnit.MILLISECONDS.toMinutes((long) startTime),
TimeUnit.MILLISECONDS.toSeconds((long) startTime) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.
toMinutes((long) startTime)))
);
seekbar.setProgress((int)startTime);
myHandler.postDelayed(UpdateSongTime,100);
pauseButton.setEnabled(true);
playButton.setEnabled(false);
}
private Runnable UpdateSongTime = new Runnable() {
public void run() {
startTime = mediaPlayer.getCurrentPosition();
startTimeField.setText(String.format("%d min, %d sec",
TimeUnit.MILLISECONDS.toMinutes((long) startTime),
TimeUnit.MILLISECONDS.toSeconds((long) startTime) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.
toMinutes((long) startTime)))
);
seekbar.setProgress((int)startTime);
myHandler.postDelayed(this, 100);
}
};
public void pause(View view){
Toast.makeText(getApplicationContext(), "Pausing sound",
Toast.LENGTH_SHORT).show();
mediaPlayer.pause();
pauseButton.setEnabled(false);
playButton.setEnabled(true);
}
public void forward(View view){
int temp = (int)startTime;
if((temp+forwardTime)<=finalTime){
startTime = startTime + forwardTime;
mediaPlayer.seekTo((int) startTime);
}
else{
Toast.makeText(getApplicationContext(),
"Cannot jump forward 5 seconds",
Toast.LENGTH_SHORT).show();
}
}
public void rewind(View view){
int temp = (int)startTime;
if((temp-backwardTime)>0){
startTime = startTime - backwardTime;
mediaPlayer.seekTo((int) startTime);
}
else{
Toast.makeText(getApplicationContext(),
"Cannot jump backward 5 seconds",
Toast.LENGTH_SHORT).show();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.media, menu);
return true;
}
}
Любая помощь будет оценена. спасибо ...
Исключение спрашивает об этом: «Невозможно найти явный класс активности {com.androiddevbook.onyourbike.chapter4/com.androiddevbook.onyourbike.chapter4.Media}; объявили ли вы эту активность в своем AndroidManifest.xml?» У вас есть? –
Вы забыли добавить что-то в свой манифест, возможно :) –
{com.androiddevbook.onyourbike.chapter4/com.androiddevbook.onyourbike.chapter4.Media}; Вы объявили эту активность в своем AndroidManifest.xml? Вау. Ник избил меня! –