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我想將java代碼佈局和xml佈局合併到一個佈局中。如何將xml佈局和編碼佈局合併爲一個佈局
我有Java代碼顯示音頻流的可視化。我有xml佈局，所以我想將兩個佈局合併爲一個來顯示媒體控制按鈕和圖像波紋管可視化佈局。
Java代碼是
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.audiofx.Visualizer;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.TextView;
import java.io.IOException;
public class AudioFxDemoActivity extends Activity {
//Here is your URL defined
String url = "http://vprbbc.streamguys.net/vprbbc24.mp3";
//Constants for vizualizator - HEIGHT 50dip
private static final float VISUALIZER_HEIGHT_DIP = 50f;
//Your MediaPlayer
MediaPlayer mp;
//Vizualization
private Visualizer mVisualizer;
private LinearLayout mLinearLayout;
private VisualizerView mVisualizerView;
private TextView mStatusTextView;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//Info textView
mStatusTextView = new TextView(this);
//Create new LinearLayout (because main.xml is empty)
mLinearLayout = new LinearLayout(this);
mLinearLayout.setOrientation(LinearLayout.VERTICAL);
mLinearLayout.addView(mStatusTextView);
//set content view to new Layout that we create
setContentView(mLinearLayout);
//start media player - like normal
mp = new MediaPlayer();
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
mp.setDataSource(url); // set data source our URL defined
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try { //tell your player to go to prepare state
mp.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//Start your stream/player
mp.start();
//setup your Vizualizer - call method
setupVisualizerFxAndUI();
//enable vizualizer
mVisualizer.setEnabled(true);
//Info text
mStatusTextView.setText("Playing audio...");
}
//Our method that sets Vizualizer
private void setupVisualizerFxAndUI() {
// Create a VisualizerView (defined below), which will render the simplified audio
// wave form to a Canvas.
//You need to have something where to show Audio WAVE - in this case Canvas
mVisualizerView = new VisualizerView(this);
mVisualizerView.setLayoutParams(new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT,
(int)(VISUALIZER_HEIGHT_DIP * getResources().getDisplayMetrics().density)));
mLinearLayout.addView(mVisualizerView);
// Create the Visualizer object and attach it to our media player.
//YOU NEED android.permission.RECORD_AUDIO for that in AndroidManifest.xml
mVisualizer = new Visualizer(mp.getAudioSessionId());
mVisualizer.setCaptureSize(Visualizer.getCaptureSizeRange()[1]);
mVisualizer.setDataCaptureListener(new Visualizer.OnDataCaptureListener() {
public void onWaveFormDataCapture(Visualizer visualizer, byte[] bytes,
int samplingRate) {
mVisualizerView.updateVisualizer(bytes);
}
public void onFftDataCapture(Visualizer visualizer, byte[] bytes, int samplingRate) {}
}, Visualizer.getMaxCaptureRate()/2, true, false);
}
@Override
protected void onPause() {
super.onPause();
if (isFinishing() && mp != null) {
mVisualizer.release();
// mEqualizer.release();
mp.release();
mp = null;
}
}
/**
* A simple class that draws waveform data received from a
* {@link Visualizer.OnDataCaptureListener#onWaveFormDataCapture }
*/
class VisualizerView extends View {
private byte[] mBytes;
private float[] mPoints;
private Rect mRect = new Rect();
private Paint mForePaint = new Paint();
public VisualizerView(Context context) {
super(context);
init();
}
private void init() {
mBytes = null;
mForePaint.setStrokeWidth(1f);
mForePaint.setAntiAlias(true);
mForePaint.setColor(Color.rgb(0, 128, 255));
}
public void updateVisualizer(byte[] bytes) {
mBytes = bytes;
invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mBytes == null) {
return;
}
if (mPoints == null || mPoints.length < mBytes.length * 4) {
mPoints = new float[mBytes.length * 4];
}
mRect.set(0, 0, getWidth(), getHeight());
for (int i = 0; i < mBytes.length - 1; i++) {
mPoints[i * 4] = mRect.width() * i/(mBytes.length - 1);
mPoints[i * 4 + 1] = mRect.height()/2
+ ((byte) (mBytes[i] + 128)) * (mRect.height()/2)/128;
mPoints[i * 4 + 2] = mRect.width() * (i + 1)/(mBytes.length - 1);
mPoints[i * 4 + 3] = mRect.height()/2
+ ((byte) (mBytes[i + 1] + 128)) * (mRect.height()/2)/128;
}
canvas.drawLines(mPoints, mForePaint);
}
}
}
和XML文件是將具有按鈕和其他的東西，我會在以後添加到XML。
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_marginBottom="151dp"
android:layout_marginLeft="22dp"
android:text="Reverse" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button1"
android:layout_alignBottom="@+id/button1"
android:layout_centerHorizontal="true"
android:text="play" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/button2"
android:layout_alignParentRight="true"
android:layout_marginRight="19dp"
android:text="forward" />
-1，你有什麼試過？你知道'膨脹'的方法嗎？ – thelawnmowerman
@thelawnmowerman我知道膨脹方法可以幫助..但在我的情況下，我不知道如何實現這個代碼和XML ..可以請你指導我 –