Android：带有TImer的录音机
作者：互联网
我正在尝试开发app,它记录了音频和音频.播放.我能够录制和播放播放录制的文件.现在我想在录制音频或声音时显示录制时间.搜索谷歌&很多事情都无法理解.任何人都可以说我如何进行下一步.
这是我用计时器录音的代码
public class AudioRecordActivity extends Activity implements OnClickListener {
MediaRecorder recorder = new MediaRecorder();
private String fileName;
private Button record;
private Button play;
private Button stop;
private TextView timeDisplay;
Chronometer myChronometer;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
record = (Button) findViewById(R.id.recordButton);
record.setOnClickListener(this);
play = (Button) findViewById(R.id.playButton);
play.setOnClickListener(this);
stop = (Button) findViewById(R.id.stopButton);
stop.setOnClickListener(this);
myChronometer = (Chronometer) findViewById(R.id.timer);
record.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myChronometer.start();
}
});
stop.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myChronometer.stop();
}
});
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.recordButton:
try {
stop.setEnabled(true);
record.setEnabled(false);
startRecording();
} catch (IOException e) {
System.out.println(e + "");
e.printStackTrace();
}
break;
case R.id.stopButton:
stop.setEnabled(false);
record.setEnabled(true);
stopRecording();
break;
case R.id.playButton:
Intent intent = new Intent();
// PLAY ANY AUDIO/VIDEO FILE
intent.setAction(android.content.Intent.ACTION_VIEW);
File file = new File("/sdcard/" + fileName);
intent.setDataAndType(Uri.fromFile(file), "audio/*");
startActivity(intent);
break;
default:
break;
}
}
void startRecording() throws IOException {
SimpleDateFormat timeStampFormat = new SimpleDateFormat(
"yyyy-MM-dd-HH.mm.ss");
// fileName = "audio_" + timeStampFormat.format(new Date()) + ".mp4";
fileName = "audioTest" + ".mp4";
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile("/sdcard/" + fileName);
recorder.setAudioEncodingBitRate(320);
recorder.setAudioSamplingRate(16000);
recorder.setAudioChannels(2);
recorder.prepare();
recorder.start();
}
private void stopRecording() {
if (null != recorder) {
try {
recorder.stop();
recorder.reset();
recorder.release();
recorder = null;
} catch (NullPointerException e) {
Toast.makeText(getApplicationContext(),
"Recording not started", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
if (KeyEvent.KEYCODE_BACK == keyCode) {
finish();
}
return super.onKeyDown(keyCode, event);
}
}
这里我的logcat错误
05-16 16:11:11.603: E/AndroidRuntime(21256): FATAL EXCEPTION: main
05-16 16:11:11.603: E/AndroidRuntime(21256): java.lang.RuntimeException: Unable to start activity ComponentInfo{xxx.com/xxx.com.AudioRecordActivity}: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.Chronometer
05-16 16:11:11.603: E/AndroidRuntime(21256): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
05-16 16:11:11.603: E/AndroidRuntime(21256): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
05-16 16:11:11.603: E/AndroidRuntime(21256): at android.app.ActivityThread.access$600(ActivityThread.java:123)
05-16 16:11:11.603: E/AndroidRuntime(21256): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
05-16 16:11:11.603: E/AndroidRuntime(21256): at android.os.Handler.dispatchMessage(Handler.java:99)
05-16 16:11:11.603: E/AndroidRuntime(21256): at android.os.Looper.loop(Looper.java:137)
05-16 16:11:11.603: E/AndroidRuntime(21256): at android.app.ActivityThread.main(ActivityThread.java:4424)
05-16 16:11:11.603: E/AndroidRuntime(21256): at java.lang.reflect.Method.invokeNative(Native Method)
05-16 16:11:11.603: E/AndroidRuntime(21256): at java.lang.reflect.Method.invoke(Method.java:511)
05-16 16:11:11.603: E/AndroidRuntime(21256): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-16 16:11:11.603: E/AndroidRuntime(21256): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-16 16:11:11.603: E/AndroidRuntime(21256): at dalvik.system.NativeStart.main(Native Method)
05-16 16:11:11.603: E/AndroidRuntime(21256): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.Chronometer
05-16 16:11:11.603: E/AndroidRuntime(21256): at xxx.com.AudioRecordActivity.onCreate(AudioRecordActivity.java:45)
05-16 16:11:11.603: E/AndroidRuntime(21256): at android.app.Activity.performCreate(Activity.java:4465)
05-16 16:11:11.603: E/AndroidRuntime(21256): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
05-16 16:11:11.603: E/AndroidRuntime(21256): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
谢谢…
解决方法:
为此你应该尝试天文台,通过这个你可以实现你的目标好运
天文台的示例代码在这里：
在main.xml中
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Chronometer
android:id="@+id/chronometer"
android:layout_gravity="center_horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/buttonstart"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Start"
/>
<Button
android:id="@+id/buttonstop"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Stop"
/>
<Button
android:id="@+id/buttonreset"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Reset"
/>
</LinearLayout>
在java文件中
package com.exercise.AndroidChronometer;
import android.app.Activity;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.View;
import android.widget.Button;
import android.widget.Chronometer;
public class AndroidChronometer extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final Chronometer myChronometer = (Chronometer)findViewById(R.id.chronometer);
Button buttonStart = (Button)findViewById(R.id.buttonstart);
Button buttonStop = (Button)findViewById(R.id.buttonstop);
Button buttonReset = (Button)findViewById(R.id.buttonreset);
buttonStart.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myChronometer.start();
}});
buttonStop.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myChronometer.stop();
}});
buttonReset.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myChronometer.setBase(SystemClock.elapsedRealtime());
}});
}
}
标签：android,timer,audio-recording 来源： https://codeday.me/bug/20190726/1538859.html