Java Android强制关闭应该已经设置了字幕控制器
我正在android studio中创建录制应用程序。我试着记录和播放结果,没有问题。但是当我第二次尝试录制时,应用程序强制关闭,LogCat只给我“E/MediaPlayer:应该已经设置了字幕控制器” 代码如下: MainActivity.javaJava Android强制关闭应该已经设置了字幕控制器,java,android,Java,Android,我正在android studio中创建录制应用程序。我试着记录和播放结果,没有问题。但是当我第二次尝试录制时,应用程序强制关闭,LogCat只给我“E/MediaPlayer:应该已经设置了字幕控制器” 代码如下: MainActivity.java package com.zihadrizkyef.belajaraudiocapture; import android.media.MediaPlayer; import android.media.MediaRecorder; import
package com.zihadrizkyef.belajaraudiocapture;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
Button btnPlay, btnStop, btnStart;
MediaRecorder myAudioRecorder;
String outputFile = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnPlay = (Button) findViewById(R.id.btnRecordPlay);
btnStart = (Button) findViewById(R.id.btnRecordStart);
btnStop = (Button) findViewById(R.id.btnRecordStop);
btnPlay.setEnabled(false);
btnStop.setEnabled(false);
outputFile = Environment.getExternalStorageDirectory().getAbsolutePath()+"/recording.3gpp";
myAudioRecorder = new MediaRecorder();
myAudioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
myAudioRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
myAudioRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
myAudioRecorder.setOutputFile(outputFile);
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
myAudioRecorder.prepare();
myAudioRecorder.start();
} catch (IOException | IllegalStateException e) {
e.printStackTrace();
}
btnStart.setEnabled(false);
btnStop.setEnabled(true);
Toast.makeText(MainActivity.this, "Recording started", Toast.LENGTH_SHORT).show();
}
});
btnStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
myAudioRecorder.stop();
myAudioRecorder.release();
/*myAudioRecorder = null;*/
btnPlay.setEnabled(true);
btnStart.setEnabled(true);
btnStop.setEnabled(false);
Toast.makeText(MainActivity.this, "Audio recorded successfully", Toast.LENGTH_SHORT).show();
}
});
btnPlay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
MediaPlayer mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setDataSource(outputFile);
} catch (IOException e) {
e.printStackTrace();
}
try {
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mediaPlayer.start();
Toast.makeText(MainActivity.this, "Playing audio", Toast.LENGTH_SHORT).show();
}
});
}
}
请尝试以下代码:
package com.zihadrizkyef.belajaraudiocapture;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
Button btnPlay, btnStop, btnStart;
MediaRecorder myAudioRecorder;
String outputFile = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnPlay = (Button) findViewById(R.id.btnRecordPlay);
btnStart = (Button) findViewById(R.id.btnRecordStart);
btnStop = (Button) findViewById(R.id.btnRecordStop);
btnPlay.setEnabled(false);
btnStop.setEnabled(false);
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
outputFile = Environment.getExternalStorageDirectory().getAbsolutePath()+"/recording.3gpp";
//Creating MediaRecorder and specifying audio source, output format, encoder & output format
myAudioRecorder = new MediaRecorder();
myAudioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
myAudioRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
myAudioRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
myAudioRecorder.setOutputFile(outputFile);
myAudioRecorder.prepare();
myAudioRecorder.start();
} catch (IOException | IllegalStateException e) {
e.printStackTrace();
}
btnStart.setEnabled(false);
btnStop.setEnabled(true);
Toast.makeText(MainActivity.this, "Recording started", Toast.LENGTH_SHORT).show();
}
});
btnStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
myAudioRecorder.stop();
myAudioRecorder.release();
/*myAudioRecorder = null;*/
btnPlay.setEnabled(true);
btnStart.setEnabled(true);
btnStop.setEnabled(false);
Toast.makeText(MainActivity.this, "Audio recorded successfully", Toast.LENGTH_SHORT).show();
}
});
btnPlay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
MediaPlayer mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setDataSource(outputFile);
} catch (IOException e) {
e.printStackTrace();
}
try {
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mediaPlayer.start();
Toast.makeText(MainActivity.this, "Playing audio", Toast.LENGTH_SHORT).show();
}
});
}
}
在这里,我所做的是创建MediaRecorder并指定音频源、输出格式。。。对于每个开始按钮,请单击所有这些内容请尝试以下代码:
package com.zihadrizkyef.belajaraudiocapture;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
Button btnPlay, btnStop, btnStart;
MediaRecorder myAudioRecorder;
String outputFile = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnPlay = (Button) findViewById(R.id.btnRecordPlay);
btnStart = (Button) findViewById(R.id.btnRecordStart);
btnStop = (Button) findViewById(R.id.btnRecordStop);
btnPlay.setEnabled(false);
btnStop.setEnabled(false);
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
outputFile = Environment.getExternalStorageDirectory().getAbsolutePath()+"/recording.3gpp";
//Creating MediaRecorder and specifying audio source, output format, encoder & output format
myAudioRecorder = new MediaRecorder();
myAudioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
myAudioRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
myAudioRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
myAudioRecorder.setOutputFile(outputFile);
myAudioRecorder.prepare();
myAudioRecorder.start();
} catch (IOException | IllegalStateException e) {
e.printStackTrace();
}
btnStart.setEnabled(false);
btnStop.setEnabled(true);
Toast.makeText(MainActivity.this, "Recording started", Toast.LENGTH_SHORT).show();
}
});
btnStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
myAudioRecorder.stop();
myAudioRecorder.release();
/*myAudioRecorder = null;*/
btnPlay.setEnabled(true);
btnStart.setEnabled(true);
btnStop.setEnabled(false);
Toast.makeText(MainActivity.this, "Audio recorded successfully", Toast.LENGTH_SHORT).show();
}
});
btnPlay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
MediaPlayer mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setDataSource(outputFile);
} catch (IOException e) {
e.printStackTrace();
}
try {
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mediaPlayer.start();
Toast.makeText(MainActivity.this, "Playing audio", Toast.LENGTH_SHORT).show();
}
});
}
}
在这里,我所做的是创建MediaRecorder并指定音频源、输出格式。。。所有这些东西对于每个开始按钮点击可能重复的可能重复的感谢,它工作。但是你能告诉我我犯了什么错误吗?问题是创建MediaRecorder和指定音频源、输出格式。。。您需要为每个会话的MediaRecorder创建新对象。如果我使用相同的音频源、输出格式等创建新的MediaRecorder。旧的MediaRecorder是否已删除?是的,旧的MediaRecorder已替换为新的OneHanks,它可以工作。但是你能告诉我我犯了什么错误吗?问题是创建MediaRecorder和指定音频源、输出格式。。。您需要为每个会话的MediaRecorder创建新对象。如果使用相同的音频源、输出格式等创建新的MediaRecorder,是否删除旧的MediaRecorder?是的,旧的MediaRecorder将替换为新的MediaRecorder