应用程序使用onTouch,崩溃onClick
问题描述:
我目前正在尝试长时间录制音频并按住。当我点击并按住该应用程序时,该应用程序仍然有效,但是,当我单击该按钮时,该应用程序会崩溃。请帮我弄清楚为什么会发生这种情况。应用程序使用onTouch,崩溃onClick
p/s:另外,有人可以告诉我如何格式化日志显示在这里?我很难与
代码
public class MainActivity extends AppCompatActivity {
private static final String LOG_TAG = "Hello";
TextView recordDisplay;
Button recordButton;
private MediaRecorder mRecorder = null;
private String mFileName = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recordDisplay = (TextView) findViewById(R.id.dislayRecordView);
recordButton = (Button) findViewById(R.id.recordButton);
mFileName = Environment.getExternalStorageDirectory().getAbsolutePath();
mFileName += "/SKBeon_recording.3gp";
recordButton.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if(motionEvent.getAction()==MotionEvent.ACTION_DOWN){
startRecording();
recordDisplay.setText("Recording Started!");
}else if (motionEvent.getAction() == MotionEvent.ACTION_UP){
stopRecording();
recordDisplay.setText("Recording Sopped!");
}
return false;
}
});
}
private void startRecording() {
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mRecorder.setOutputFile(mFileName);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
mRecorder.prepare();
} catch (IOException e) {
Log.e(LOG_TAG, "prepare() failed");
}
mRecorder.start();
}
private void stopRecording() {
mRecorder.stop();
mRecorder.release();
mRecorder = null;
}
}
的Xml主:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent">
<TextView
android:id="@+id/dislayRecordView"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<Button
android:id="@+id/recordButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Record"
/>
</LinearLayout>
logcat的:
- 09-04 01:28:51.618 22535-22535/english_malay.my.apps.com.recordaudio E/MediaRecorder: stop failed: -1007
- 09-04 01:28:51.619 22535-22535/english_malay.my.apps.com.recordaudio E/InputEventReceiver: Exception dispatching input event.
- 09-04 01:28:51.619 22535-22535/english_malay.my.apps.com.recordaudio E/MessageQueue-JNI: Exception in MessageQueue callback: handleReceiveCallback
- 09-04 01:28:51.621 22535-22535/english_malay.my.apps.com.recordaudio E/MessageQueue-JNI: java.lang.RuntimeException: stop failed.
* at android.media.MediaRecorder.stop(Native Method)
* at english_malay.my.apps.com.recordaudio.MainActivity.stopRecording(MainActivity.java:70)
* at english_malay.my.apps.com.recordaudio.MainActivity.access$100(MainActivity.java:18)
- 09-04 01:28:51.621 22535-22535/english_malay.my.apps.com.recordaudio D/AndroidRuntime: Shutting down VM
- 09-04 01:28:51.622 22535-22535/english_malay.my.apps.com.recordaudio E/AndroidRuntime: FATAL EXCEPTION: main
- Process: english_malay.my.apps.com.recordaudio, PID: 22535
java.lang.RuntimeException: stop failed.
* at android.media.MediaRecorder.stop(Native Method)
* at english_malay.my.apps.com.recordaudio.MainActivity.stopRecording(MainActivity.java:70)
答
简单,那是因为你正在试图阻止非记录记录!
你应该在停止记录仪之前检查。
private void startRecording() {
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mRecorder.setOutputFile(mFileName);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
mRecorder.prepare();
} catch (IOException e) {
Log.e(LOG_TAG, "prepare() failed");
}
isRecording = true;
mRecorder.start();
}
和:
private void stopRecording() {
try{
if(mRecorder!=null && isRecording){
mRecorder.stop();
mRecorder.release();
mRecorder = null;
}
}catch (Exception e){//handle this exception}
}
另外,应在开始记录之前添加一些延迟时间(1秒例如)时:action == MotionEvent.ACTION_DOWN
,为了能够click
和click&hold
区分
答
裹在try/catch语句您stopRecording()
内容
答
您的mRecorder在调用stopRecording时为null。做以下修改
private void stopRecording() {
if(mRecorder!=null){
mRecorder.stop();
mRecorder.release();
mRecorder = null;
}
}
答
在调用stop()
方法之前,您必须检查mRecorder
对象是否为null它。由于该对象为空,因此您将遇到崩溃。
private void stopRecording() {
if(null != mRecorder){
mRecorder.stop();
mRecorder.release();
mRecorder = null;
}
}
好,它的工作原理!最后一件事,你能告诉我如何在开始录制之前延迟或者任何链接都可以做到。谢谢你,Atef Hares。 –
@ S.k.Surain不用客气。你可以使用这个[answer](https://*.com/a/9166354/5993410)这是一个简单的方法来延迟执行一些代码。 –
我也很好奇。它从技术上调用Action_down(它又调用startRecording())是如何不记录的?再次感谢 –