更新：不幸的是，我还无法为我的问题找到解决方案......
我正在android上开发一个记录器，我想在记录时显示可视化。我有以下课程。当我运行项目并按下开始记录时，我在录制时看不到任何可视化工具。我在真实设备上测试下面的代码并添加权限到清单。
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>
我使用开源项目可视化器来播放“Felix Palmer”，并自己将链接记录器的新方法添加到可视化器。我认为必须完美运行。但不幸的是，我的录音机真的有任何显示。（代码没有任何错误）我如何解决我的问题并查看可视化工具？这是VisualizerView.java课...
import java.util.HashSet;
import java.util.Set;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.media.audiofx.Visualizer;
import android.util.AttributeSet;
import android.view.View;
import com.pheelicks.visualizer.renderer.Renderer;
public class VisualizerView extends View {
private byte[] mBytes;
private byte[] mFFTBytes;
private Rect mRect = new Rect();
private Visualizer mVisualizer;
private Set<Renderer> mRenderers;
private Paint mFlashPaint = new Paint();
private Paint mFadePaint = new Paint();
public VisualizerView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs);
init();
}
public VisualizerView(Context context, AttributeSet attrs)
{
this(context, attrs, 0);
}
public VisualizerView(Context context)
{
this(context, null, 0);
}
private void init() {
mBytes = null;
mFFTBytes = null;
mFlashPaint.setColor(Color.argb(122, 255, 255, 255));
mFadePaint.setColor(Color.argb(238, 255, 255, 255)); // Adjust alpha to change how quickly the image fades
mFadePaint.setXfermode(new PorterDuffXfermode(Mode.MULTIPLY));
mRenderers = new HashSet<Renderer>();
}
//-----------------------------------------------
public void link(MediaRecorder recorder)
{
if(recorder == null)
{
throw new NullPointerException("Cannot link to null MediaPlayer");
}
mVisualizer = new Visualizer(0);
mVisualizer.setCaptureSize(Visualizer.getCaptureSizeRange()[1]);
Visualizer.OnDataCaptureListener datacaptureListener1=new Visualizer.OnDataCaptureListener()
{
@Override
public void onWaveFormDataCapture(Visualizer visualizer, byte[] bytes,
int samplingRate)
{
// TODO Auto-generated method stub
updateVisualizer(bytes);
}
@Override
public void onFftDataCapture(Visualizer visualizer, byte[] bytes,
int samplingRate)
{
// TODO Auto-generated method stub
updateVisualizerFFT(bytes);
}
};
mVisualizer.setDataCaptureListener(datacaptureListener1,Visualizer.getMaxCaptureRate() /2,false,true);
mVisualizer.setEnabled(true);
}
//-----------------------------------------------
这是AudioRecorder.java...
public class AudioRecorder
{
private String name="";
private static int id=0;
private MediaRecorder recorder = new MediaRecorder();
private String path=null;
VisualizerView mVisualizerView;
private Context context=null;
//-----------------------------------------------
public AudioRecorder(Context context)
{
this.context=context;
}
//-----------------------------------------------
public void Record() throws IOException
{
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(this.path);
LayoutInflater inflater = LayoutInflater.from(context);
View view = inflater.inflate(R.layout.recorder1, null);
mVisualizerView = (VisualizerView)view.findViewById(R.id.visualizer1);
mVisualizerView.link(recorder);
addLineRenderer();
try
{
recorder.prepare();
}
catch (IllegalStateException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
try
{
System.out.println("****");
recorder.start();
}
catch (Exception e)
{
}
}
//------------------------------------------
public void stopRecord() throws IOException
{
recorder.stop();
recorder.release();
}
这是我的 XML 中的可视化工具。
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="@drawable/highlight_shared"
android:orientation="vertical"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="5dp" >
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="@drawable/corner_liner" >
<com.pheelicks.visualizer.VisualizerView
android:id="@+id/visualizer1"
android:layout_width="match_parent"
android:layout_height="fill_parent"/>
</FrameLayout>
</LinearLayout>