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TextRenderer.MeasureText和Graphics.MeasureString大小不匹配

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针对TextRenderer.MeasureText和Graphics.MeasureString大小不匹配这个问题，本篇文章进行了详细的解答，同时本文还将给你拓展androidcamera的Surf

针对TextRenderer.MeasureText和Graphics.MeasureString大小不匹配这个问题，本篇文章进行了详细的解答，同时本文还将给你拓展android camera的SurfaceTexture - SurfaceTexture作为preview流的消费者,代码位置在哪里.、android – getmeasuredheight()和getmeasuredwidth()在View.measure()之后返回0)、Android 画图：.measureText() 与 .getTextBounds()、android.graphics.SurfaceTexture的实例源码等相关知识，希望可以帮助到你。

本文目录一览：

TextRenderer.MeasureText和Graphics.MeasureString大小不匹配

TextRenderer.MeasureText和Graphics.MeasureString大小不匹配

这不是一个四舍五入的问题。差异〜5+像素。

测试用例字符串：“” MACD（26,12,9）-0.000016“

e.Graphics.MeasureString("MACD (26,12,9) -0.000016", SystemFonts.DefaultFont).Width)TextRenderer.MeasureText("MACD (26,12,9) -0.000016", SystemFonts.DefaultFont).Width)

结果始终是： 

139.3942134

为什么尺寸有这么大的差异？我只需要外部绘画方法的字符串宽度的一轮。但是它应该匹配MeasureString，反之亦然。

答案1

小编典典

TextRenderer使用GDI呈现文本，而Graphics使用GDI +。两者使用略微不同的方法来布置文本，因此大小不同。

您应该使用哪一个取决于最终将用于实际绘制文本的内容。如果要使用GDI
+进行绘制Graphics.DrawString，请使用进行测量Graphics.MeasureString。如果使用GDI进行绘图，请使用进行TextRenderer.DrawText测量TextRenderer.MeasureText。

如果文本将显示在Windows Forms控件内，则使用TextRendererif
UseCompatibleTextRendering设置为false（默认）。

在问题的各行之间阅读，您似乎正在使用，TextRenderer因为事件Graphics外没有实例Paint。如果是这样，您可以自己创建一个进行测量：

using( Graphics g = someControl.CreateGraphics() ){    SizeF size = g.MeasureString("some text", SystemFonts.DefaultFont);}

如果您无权创建图形实例的控件，则可以使用该控件为屏幕创建一个实例，该控件可以很好地用于测量目的。

using( Graphics g = Graphics.FromHwnd(IntPtr.Zero) ){     SizeF size = g.MeasureString("some text", SystemFonts.DefaultFont);}

android camera的SurfaceTexture - SurfaceTexture作为preview流的消费者,代码位置在哪里.

android camera的SurfaceTexture - SurfaceTexture作为preview流的消费者,代码位置在哪里.

环境: 三星Exynos8890平台. 安卓6.0系统
功能: camera2 的preview功能.
问题:目前想测试 preview的显示延时, 但是在HAL层enqueue buffer后, frame是先交给 camera 的 SurfaceTexture去先做处理,然后再交给SurfaceFlinger去合成再显示. 目前我想知道SurfaceTexture具体处理流 程是怎么样的(Framework->HAL->Kernel), 它是怎么把处理好的frame buffer, 之后enqueue给 SurfaceFlinger去合成再显示(我们想在它enqueue buffer处加上 timestamp).  
哪位大神可以给小弟解决一下,万分感谢.

android – getmeasuredheight()和getmeasuredwidth()在View.measure()之后返回0)

android – getmeasuredheight()和getmeasuredwidth()在View.measure()之后返回0)

在使用view.measure()测量具有恒定维度的视图后,getMeasuredHeight()和getMeasureWidth()返回0.

layout_view.xml,用于创建视图的布局

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="100dp"
    android:layout_height="100dp">
</FrameLayout>

测量尺寸的功能

public void measureView(Context context){
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view = inflater.inflate(R.layout.layout_view,null,false);

    view.measure( View.MeasureSpec.UNSPECIFIED,View.MeasureSpec.UNSPECIFIED);

    Log.d(TAG,"Error width : " + view.getMeasuredWidth());
    Log.d(TAG,"Error heeght : " + view.getMeasuredHeight());

}

解决方法

当您调用onCreate()或onCreateView()中的view.getMeasuredWidth()时,该视图尚未绘制.所以,您需要添加一个listen,并在绘制视图时获取回调.就像我的代码一样： 
ViewTreeObserver vto = view.getViewTreeObserver();
            vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
                @Override
                public void onGlobalLayout() {
                    int viewWidth = view.getMeasuredWidth();
                    // handle viewWidth here...
                    if (Build.VERSION.SDK_INT<16) {
                        v.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                    } else { 
                        v.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                    }
            });

注意：删除侦听器以获得更好的性能;

不要调用vto来删除,调用如下：

v.getViewTreeObserver()

Android 画图：.measureText() 与 .getTextBounds()

Android 画图：.measureText() 与 .getTextBounds()

我正在使用
测量文本Paint.getTextBounds()，因为我对获取要呈现的文本的高度和宽度感兴趣。但是，实际呈现的文本总是比.填充.width()的信息宽一点。Rect``getTextBounds()

令我惊讶的是，我测试.measureText()了 ，发现它返回了不同的（更高的）值。我试了一下，发现是对的。

为什么他们报告不同的宽度？如何正确获取高度和宽度？我的意思是，我 可以
使用.measureText()，但是我不知道我是否应该信任.height()返回的getTextBounds().

根据要求，这里是重现问题的最少代码：

final String someText = "Hello. I believe I''m some text!";Paint p = new Paint();Rect bounds = new Rect();for (float f = 10; f < 40; f += 1f) {    p.setTextSize(f);    p.getTextBounds(someText, 0, someText.length(), bounds);    Log.d("Test", String.format(        "Size %f, measureText %f, getTextBounds %d",        f,        p.measureText(someText),        bounds.width())    );}

输出显示差异不仅大于 1（并且没有最后一分钟的舍入误差），而且似乎随着大小而增加（我正要得出更多结论，但它可能完全取决于字体）：

D/Test    (  607): Size 10.000000, measureText 135.000000, getTextBounds 134D/Test    (  607): Size 11.000000, measureText 149.000000, getTextBounds 148D/Test    (  607): Size 12.000000, measureText 156.000000, getTextBounds 155D/Test    (  607): Size 13.000000, measureText 171.000000, getTextBounds 169D/Test    (  607): Size 14.000000, measureText 195.000000, getTextBounds 193D/Test    (  607): Size 15.000000, measureText 201.000000, getTextBounds 199D/Test    (  607): Size 16.000000, measureText 211.000000, getTextBounds 210D/Test    (  607): Size 17.000000, measureText 225.000000, getTextBounds 223D/Test    (  607): Size 18.000000, measureText 245.000000, getTextBounds 243D/Test    (  607): Size 19.000000, measureText 251.000000, getTextBounds 249D/Test    (  607): Size 20.000000, measureText 269.000000, getTextBounds 267D/Test    (  607): Size 21.000000, measureText 275.000000, getTextBounds 272D/Test    (  607): Size 22.000000, measureText 297.000000, getTextBounds 294D/Test    (  607): Size 23.000000, measureText 305.000000, getTextBounds 302D/Test    (  607): Size 24.000000, measureText 319.000000, getTextBounds 316D/Test    (  607): Size 25.000000, measureText 330.000000, getTextBounds 326D/Test    (  607): Size 26.000000, measureText 349.000000, getTextBounds 346D/Test    (  607): Size 27.000000, measureText 357.000000, getTextBounds 354D/Test    (  607): Size 28.000000, measureText 369.000000, getTextBounds 365D/Test    (  607): Size 29.000000, measureText 396.000000, getTextBounds 392D/Test    (  607): Size 30.000000, measureText 401.000000, getTextBounds 397D/Test    (  607): Size 31.000000, measureText 418.000000, getTextBounds 414D/Test    (  607): Size 32.000000, measureText 423.000000, getTextBounds 418D/Test    (  607): Size 33.000000, measureText 446.000000, getTextBounds 441D/Test    (  607): Size 34.000000, measureText 455.000000, getTextBounds 450D/Test    (  607): Size 35.000000, measureText 468.000000, getTextBounds 463D/Test    (  607): Size 36.000000, measureText 474.000000, getTextBounds 469D/Test    (  607): Size 37.000000, measureText 500.000000, getTextBounds 495D/Test    (  607): Size 38.000000, measureText 506.000000, getTextBounds 501D/Test    (  607): Size 39.000000, measureText 521.000000, getTextBounds 515

答案1

小编典典

你可以做我所做的来检查这样的问题：

研究 Android 源代码，Paint.java 源，同时查看 measureText 和 getTextBounds 方法。您将了解到
measureText 调用 native_measureText，getTextBounds 调用 nativeGetStringBounds，它们是用
C++ 实现的本地方法。

因此，您将继续研究 Paint.cpp，它实现了两者。

native_measureText -> SkPaintGlue::measureText_CII

nativeGetStringBounds -> SkPaintGlue::getStringBounds

现在，您的研究检查了这些方法的不同之处。经过一些参数检查后，两者都调用了 Skia Lib（Android 的一部分）中的函数
SkPaint::measureText，但它们都调用了不同的重载形式。

深入研究 Skia，我发现这两个调用都在同一个函数中产生了相同的计算，只是返回的结果不同。

回答您的问题： 您的两个调用都进行相同的计算。结果的可能差异实际上在于 getTextBounds 以整数返回边界，而
measureText 返回浮点值。

因此，您得到的是在将 float 转换为 int 期间出现舍入错误，这发生在 SkPaintGlue::doTextBounds 中的 Paint.cpp
中调用函数 SkRect::roundOut。

这两个调用的计算宽度之差可能最大为 1。

编辑 2011 年 10 月 4 日

什么可能比可视化更好。我付出了努力，为了自己的探索，为了值得赏金:)

在此处输入图像描述

这是字体大小 60，红色是 边界 矩形，紫色是 measureText 的结果。

可以看出 bounds left 部分从左侧开始一些像素，并且 measureText 的值在左侧和右侧都增加了该值。这就是所谓的 Glyph 的
AdvanceX 值。（我在 SkPaint.cpp 的 Skia 资源中发现了这一点）

所以测试的结果是 measureText 为两边的文本添加了一些高级值，而 getTextBounds 计算给定文本适合的最小边界。

希望这个结果对你有用。

测试代码：

  protected void onDraw(Canvas canvas){     final String s = "Hello. I''m some text!";     Paint p = new Paint();     Rect bounds = new Rect();     p.setTextSize(60);     p.getTextBounds(s, 0, s.length(), bounds);     float mt = p.measureText(s);     int bw = bounds.width();     Log.i("LCG", String.format(          "measureText %f, getTextBounds %d (%s)",          mt,          bw, bounds.toShortString())      );     bounds.offset(0, -bounds.top);     p.setStyle(Style.STROKE);     canvas.drawColor(0xff000080);     p.setColor(0xffff0000);     canvas.drawRect(bounds, p);     p.setColor(0xff00ff00);     canvas.drawText(s, 0, bounds.bottom, p);  }

android.graphics.SurfaceTexture的实例源码

android.graphics.SurfaceTexture的实例源码

项目：ListVideoPlayer    文件：MediaManager.java    
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture,int i,int i1) {
    Log.i(TAG,"onSurfaceTextureAvailable [" + this.hashCode() + "] ");
    if (savedSurfaceTexture == null) {
        savedSurfaceTexture = surfaceTexture;
        prepare();
    } else {
        textureView.setSurfaceTexture(savedSurfaceTexture);
    }
}
项目：TK_1701    文件：Camera2.java    
public void open() {
    try {
        CameraManager manager = (CameraManager) mActivity.getSystemService(Context.CAMERA_SERVICE);
        for (String cameraId : manager.getCameraIdList()) {
            Cameracharacteristics characteristics = manager.getCameracharacteristics(cameraId);
            if (characteristics.get(Cameracharacteristics.LENS_FACING) == Cameracharacteristics.LENS_FACING_BACK) {
                StreamConfigurationMap map = characteristics.get(Cameracharacteristics.SCALER_STREAM_CONfigURATION_MAP);
                mCameraSize = map.getoutputSizes(SurfaceTexture.class)[0];

                HandlerThread thread = new HandlerThread("OpenCamera");
                thread.start();
                Handler backgroundHandler = new Handler(thread.getLooper());

                manager.openCamera(cameraId,mCameraDeviceCallback,null);

                // カメラの物理的な情報を得る
                mCameracharacteristics = manager.getCameracharacteristics( cameraId );
                return;
            }
        }
    } catch (CameraAccessException e) {
        e.printstacktrace();
    }
}
项目：VideoCRE    文件：Camera2Session.java    
@Override
public void onopened(CameraDevice camera) {
  checkIsOnCameraThread();

  Logging.d(TAG,"Camera opened.");
  cameraDevice = camera;

  final SurfaceTexture surfaceTexture = surfaceTextureHelper.getSurfaceTexture();
  surfaceTexture.setDefaultBufferSize(captureFormat.width,captureFormat.height);
  surface = new Surface(surfaceTexture);
  List<Surface> surfaces = new ArrayList<Surface>();
  surfaces.add(surface);
  if (mediaRecorderSurface != null) {
    Logging.d(TAG,"Add MediaRecorder surface to capture session.");
    surfaces.add(mediaRecorderSurface);
  }
  try {
    camera.createCaptureSession(surfaces,new CaptureSessionCallback(),cameraThreadHandler);
  } catch (CameraAccessException e) {
    reportError("Failed to create capture session. " + e);
    return;
  }
}
项目：AAVT    文件：Mp4Provider.java    
@Override
public Point open(SurfaceTexture surface) {
    try {
        if(!extractMedia()){
            return new Point(0,0);
        }
        mFrameSem=new Semaphore(0);
        mDecodeSem=new Semaphore(1);
        videoProvideEndFlag=false;
        isUserWantToStop=false;
        mAudioEncodeTrack=mStore.addTrack(mExtractor.getTrackFormat(mAudioDecodeTrack));
        MediaFormat format=mExtractor.getTrackFormat(mVideoDecodeTrack);
        mVideoDecoder = MediaCodec.createDecoderByType(format.getString(MediaFormat.KEY_MIME));
        mVideoDecoder.configure(format,new Surface(surface),null,0);
        mVideoDecoder.start();
        startDecodeThread();
    } catch (IOException e) {
        e.printstacktrace();
    }
    return mVideoSize;
}
项目：GestureVideoView    文件：TextureRenderView.java    
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public void bindToMediaPlayer(IMediaPlayer mp) {
    if (mp == null)
        return;

    if ((Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) &&
            (mp instanceof ISurfaceTextureHolder)) {
        ISurfaceTextureHolder textureHolder = (ISurfaceTextureHolder) mp;
        mTextureView.mSurfaceCallback.setownSurfaceTexture(false);

        SurfaceTexture surfaceTexture = textureHolder.getSurfaceTexture();
        if (surfaceTexture != null) {
            mTextureView.setSurfaceTexture(surfaceTexture);
        } else {
            textureHolder.setSurfaceTexture(mSurfaceTexture);
            textureHolder.setSurfaceTextureHost(mTextureView.mSurfaceCallback);
        }
    } else {
        mp.setSurface(openSurface());
    }
}
项目：ShaddockVideoPlayer    文件：TextureRenderView.java    
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public void bindToMediaPlayer(IMediaPlayer mp) {
    if (mp == null)
        return;

    if ((Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) &&
            (mp instanceof ISurfaceTextureHolder)) {
        ISurfaceTextureHolder textureHolder = (ISurfaceTextureHolder) mp;
        mTextureView.mSurfaceCallback.setownSurfaceTexture(false);

        SurfaceTexture surfaceTexture = textureHolder.getSurfaceTexture();
        if (surfaceTexture != null) {
            mTextureView.setSurfaceTexture(surfaceTexture);
        } else {
            textureHolder.setSurfaceTexture(mSurfaceTexture);
            textureHolder.setSurfaceTextureHost(mTextureView.mSurfaceCallback);
        }
    } else {
        mp.setSurface(openSurface());
    }
}
项目：EZFilter    文件：EGLEnvironment.java    
EglSurface(final EGLEnvironment egl,final Object surface) {
    if (!(surface instanceof SurfaceView)
            && !(surface instanceof Surface)
            && !(surface instanceof SurfaceHolder)
            && !(surface instanceof SurfaceTexture))
        throw new IllegalArgumentException("unsupported surface");
    mEgl = egl;
    mEglSurface = mEgl.createWindowSurface(surface);
    mWidth = mEgl.querySurface(mEglSurface,EGL14.EGL_WIDTH);
    mHeight = mEgl.querySurface(mEglSurface,EGL14.EGL_HEIGHT);
}
项目：NSMPlayer-Android    文件：TextureRenderView.java    
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface,int width,int height) {
    mSurfaceTexture = surface;
    mIsFormatChanged = false;
    mWidth = 0;
    mHeight = 0;

    ISurfaceHolder surfaceHolder = new InternalSurfaceHolder(mWeakRenderView.get(),surface);
    for (IRenderCallback renderCallback : mRenderCallbackMap.keySet()) {
        renderCallback.onSurfaceCreated(surfaceHolder,0);
    }
}
项目：OkayCamera-Android    文件：Camera2RawFragment.java    
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture texture) {
    synchronized (mCameraStateLock) {
        mPreviewSize = null;
    }
    return true;
}
项目：react-native-scan-doc    文件：CameraglrendererBase.java    
private void initSurfaceTexture() {
    Log.d(LOGTAG,"initSurfaceTexture");
    deleteSurfaceTexture();
    initTexOES(texCamera);
    mSTexture = new SurfaceTexture(texCamera[0]);
    mSTexture.setonFrameAvailableListener(this);
}
项目：BLPlayer    文件：TextureRenderView.java    
public InternalSurfaceHolder(@NonNull TextureRenderView textureView,@Nullable SurfaceTexture surfaceTexture,@NonNull ISurfaceTextureHost surfaceTextureHost) {
    mTextureView = textureView;
    mSurfaceTexture = surfaceTexture;
    mSurfaceTextureHost = surfaceTextureHost;
}
项目：EyeShopping    文件：CameraglrendererBase.java    
private void initSurfaceTexture() {
    Log.d(LOGTAG,"initSurfaceTexture");
    deleteSurfaceTexture();
    initTexOES(texCamera);
    mSTexture = new SurfaceTexture(texCamera[0]);
    mSTexture.setonFrameAvailableListener(this);
}
项目：Exoplayer2Radio    文件：SimpleExoPlayer.java    
/**
 * Sets the {@link TextureView} onto which video will be rendered. The player will track the
 * lifecycle of the surface automatically.
 *
 * @param textureView The texture view.
 */
public void setVideoTextureView(TextureView textureView) {
  removeSurfaceCallbacks();
  this.textureView = textureView;
  if (textureView == null) {
    setVideoSurfaceInternal(null,true);
  } else {
    if (textureView.getSurfaceTextureListener() != null) {
      Log.w(TAG,"Replacing existing SurfaceTextureListener.");
    }
    SurfaceTexture surfaceTexture = textureView.getSurfaceTexture();
    setVideoSurfaceInternal(surfaceTexture == null ? null : new Surface(surfaceTexture),true);
    textureView.setSurfaceTextureListener(componentListener);
  }
}
项目：MediaCodecRecorder    文件：RecordingActivity.java    
@Override
public void onCameraSurfaceDestroy(SurfaceTexture surfaceTexture) {
    Log.d(TAG,"onCameraSurfaceDestroy");
    isSurfaceReady = false;
    mCamera.stopPreview();
    mCamera.release();
    if (mVideoRecorder.isRecording()) {
        mVideoRecorder.stop();
    }
}
项目：Team9261-2017-2018    文件：CameraglrendererBase.java    
private void initSurfaceTexture() {
    Log.d(LOGTAG,"initSurfaceTexture");
    deleteSurfaceTexture();
    initTexOES(texCamera);
    mSTexture = new SurfaceTexture(texCamera[0]);
    mSTexture.setonFrameAvailableListener(this);
}
项目：GitHub    文件：TextureRenderView.java    
@Override
public void releaseSurfaceTexture(SurfaceTexture surfaceTexture) {
    if (surfaceTexture == null) {
        Log.d(TAG,"releaseSurfaceTexture: null");
    } else if (mDidDetachFromWindow) {
        if (surfaceTexture != mSurfaceTexture) {
            Log.d(TAG,"releaseSurfaceTexture: didDetachFromWindow(): release different SurfaceTexture");
            surfaceTexture.release();
        } else if (!mOwnSurfaceTexture) {
            Log.d(TAG,"releaseSurfaceTexture: didDetachFromWindow(): release detached SurfaceTexture");
            surfaceTexture.release();
        } else {
            Log.d(TAG,"releaseSurfaceTexture: didDetachFromWindow(): already released by TextureView");
        }
    } else if (mWillDetachFromWindow) {
        if (surfaceTexture != mSurfaceTexture) {
            Log.d(TAG,"releaseSurfaceTexture: willDetachFromWindow(): release different SurfaceTexture");
            surfaceTexture.release();
        } else if (!mOwnSurfaceTexture) {
            Log.d(TAG,"releaseSurfaceTexture: willDetachFromWindow(): re-attach SurfaceTexture to TextureView");
            setownSurfaceTexture(true);
        } else {
            Log.d(TAG,"releaseSurfaceTexture: willDetachFromWindow(): will released by TextureView");
        }
    } else {
        if (surfaceTexture != mSurfaceTexture) {
            Log.d(TAG,"releaseSurfaceTexture: alive: release different SurfaceTexture");
            surfaceTexture.release();
        } else if (!mOwnSurfaceTexture) {
            Log.d(TAG,"releaseSurfaceTexture: alive: re-attach SurfaceTexture to TextureView");
            setownSurfaceTexture(true);
        } else {
            Log.d(TAG,"releaseSurfaceTexture: alive: will released by TextureView");
        }
    }
}
项目：PaoMovie    文件：CameraEngine.java    
public static void startPreview(SurfaceTexture surfaceTexture){
    try {
        mCamera.setPreviewTexture(surfaceTexture);
        mCamera.startPreview();
    } catch (IOException e) {
        // Todo Auto-generated catch block
        e.printstacktrace();
    }   
}
项目：real_time_circle_detection_android    文件：CameraglrendererBase.java    
private void initSurfaceTexture() {
    Log.d(LOGTAG,"initSurfaceTexture");
    deleteSurfaceTexture();
    initTexOES(texCamera);
    mSTexture = new SurfaceTexture(texCamera[0]);
    mSTexture.setonFrameAvailableListener(this);
}
项目：mao-android    文件：VideoPlayFragment.java    
@Override
public void onSurfaceCreated(GL10 gl,EGLConfig config) {
    GLES20.glClearColor(0.0f,1.0f,0.0f,0.0f);
    GLES20.gldisable(GLES20.GL_DEPTH_TEST);
    mTexture = Openglutils.genOesTexture();
    mGLImageView.setimageTexture(mTexture);

    mSurfaceTexture = new SurfaceTexture(mTexture);
    mSurfaceTexture.setonFrameAvailableListener(this);
    mVideoPlayer.setoutSurface(new Surface(mSurfaceTexture));
}
项目：airgram    文件：VideoEditorActivity.java    
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
    if (videoPlayer == null) {
        return true;
    }
    videoPlayer.setdisplay(null);
    return true;
}
项目：BLPlayer    文件：TextureRenderView.java    
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
    mSurfaceTexture = surface;
    mIsFormatChanged = false;
    mWidth = 0;
    mHeight = 0;

    ISurfaceHolder surfaceHolder = new InternalSurfaceHolder(mWeakRenderView.get(),surface,this);
    for (IRenderCallback renderCallback : mRenderCallbackMap.keySet()) {
        renderCallback.onSurfaceDestroyed(surfaceHolder);
    }

    Log.d(TAG,"onSurfaceTextureDestroyed: destroy: " + mOwnSurfaceTexture);
    return mOwnSurfaceTexture;
}
项目：PlayerBase    文件：TextureRenderView.java    
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
    mSurfaceTexture = surface;
    mIsFormatChanged = false;
    mWidth = 0;
    mHeight = 0;

    ISurfaceHolder surfaceHolder = new InternalSurfaceHolder(mWeakRenderView.get(),"onSurfaceTextureDestroyed: destroy: " + mOwnSurfaceTexture);
    return mOwnSurfaceTexture;
}
项目：AndroidTvDemo    文件：TextureRenderView.java    
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface,int height)
{
    mSurfaceTexture = surface;
    mIsFormatChanged = true;
    mWidth = width;
    mHeight = height;

    ISurfaceHolder surfaceHolder = new InternalSurfaceHolder(mWeakRenderView.get(),this);
    for (IRenderCallback renderCallback : mRenderCallbackMap.keySet())
    {
        renderCallback.onSurfaceChanged(surfaceHolder,width,height);
    }
}
项目：boohee_v5.6    文件：TextureRenderView.java    
public void onSurfaceTextureAvailable(SurfaceTexture surface,int height) {
    this.mSurfaceTexture = surface;
    this.mIsFormatChanged = false;
    this.mWidth = 0;
    this.mHeight = 0;
    ISurfaceHolder surfaceHolder = new InternalSurfaceHolder((TextureRenderView) this
            .mWeakRenderView.get(),this);
    for (IRenderCallback renderCallback : this.mRenderCallbackMap.keySet()) {
        renderCallback.onSurfaceCreated(surfaceHolder,0);
    }
}
项目：MOAAP    文件：CameraglrendererBase.java    
private void initSurfaceTexture() {
    Log.d(LOGTAG,"initSurfaceTexture");
    deleteSurfaceTexture();
    initTexOES(texCamera);
    mSTexture = new SurfaceTexture(texCamera[0]);
    mSTexture.setonFrameAvailableListener(this);
}
项目：trust-wallet-android    文件：CameraSource.java    
/**
 * Opens the camera and starts sending preview frames to the underlying detector.  The preview
 * frames are not displayed.
 *
 * @throws IOException if the camera's preview texture or display Could not be initialized
 */
@RequiresPermission(Manifest.permission.CAMERA)
public CameraSource start() throws IOException {
    synchronized (mCameraLock) {
        if (mCamera != null) {
            return this;
        }

        mCamera = createCamera();

        // SurfaceTexture was introduced in Honeycomb (11),so if we are running and
        // old version of Android. fall back to use SurfaceView.
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            mDummySurfaceTexture = new SurfaceTexture(DUMMY_TEXTURE_NAME);
            mCamera.setPreviewTexture(mDummySurfaceTexture);
        } else {
            mDummySurfaceView = new SurfaceView(mContext);
            mCamera.setPreviewdisplay(mDummySurfaceView.getHolder());
        }
        mCamera.startPreview();

        mProcessingThread = new Thread(mFrameProcessor);
        mFrameProcessor.setActive(true);
        mProcessingThread.start();
    }
    return this;
}
项目：Agora-Screen-Sharing-Android    文件：glrender.java    
public void onSurfaceTextureAvailable(SurfaceTexture surface,int height) {
    Log.d(TAG,"onSurfaceTextureAvailable " + surface + " " + width + " " + height);
    initHandlerThread();

    Message msg = Message.obtain(mGLHandler,MSG_TYPE_SURFACE_CREATED,surface);
    mGLHandler.sendMessage(msg);
    msg = Message.obtain(mGLHandler,MSG_TYPE_SURFACE_CHANGED,height);
    mGLHandler.sendMessage(msg);
}
项目：Hitalk    文件：TextureVideoView.java    
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface,int height) {
    mSurface = new Surface(surface);
    if(mTargetState == STATE_PLAYING) {
        if(SHOW_LOGS) Log.i(TAG,"onSurfaceTextureAvailable start");
        start();
    }
}
项目：aurora    文件：SampleVideo.java    
/**
 * 处理显示逻辑
 */
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface,int height) {
    super.onSurfaceTextureAvailable(surface,height);
    resolveRotateUI();
    resolveTransform();
}
项目：Android-Code-Demos    文件：CameraglrendererBase.java    
private void initSurfaceTexture() {
    Log.d(LOGTAG,"initSurfaceTexture");
    deleteSurfaceTexture();
    initTexOES(texCamera);
    mSTexture = new SurfaceTexture(texCamera[0]);
    mSTexture.setonFrameAvailableListener(this);
}
项目：grafika    文件：TextureViewCanvasActivity.java    
@Override   // will be called on UI thread
public boolean onSurfaceTextureDestroyed(SurfaceTexture st) {
    Log.d(TAG,"onSurfaceTextureDestroyed");

    synchronized (mlock) {
        mSurfaceTexture = null;
    }
    return true;
}
项目：rtmp-rtsp-stream-client-java    文件：Camera2apimanager.java    
public Size[] getCameraResolutionsFront() {
  try {
    Cameracharacteristics cameracharacteristics = cameraManager.getCameracharacteristics("0");
    if (cameracharacteristics.get(Cameracharacteristics.LENS_FACING)
        != Cameracharacteristics.LENS_FACING_FRONT) {
      cameracharacteristics = cameraManager.getCameracharacteristics("1");
    }
    StreamConfigurationMap streamConfigurationMap =
        cameracharacteristics.get(Cameracharacteristics.SCALER_STREAM_CONfigURATION_MAP);
    return streamConfigurationMap.getoutputSizes(SurfaceTexture.class);
  } catch (CameraAccessException e) {
    Log.e(TAG,e.getMessage());
    return new Size[0];
  }
}
项目：BLPlayer    文件：TextureRenderView.java    
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface,this);
    for (IRenderCallback renderCallback : mRenderCallbackMap.keySet()) {
        renderCallback.onSurfaceCreated(surfaceHolder,0);
    }
}
项目：phonk    文件：CustomVideoTextureView.java    
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface,int height) {
    if (mOnEvent != null) mOnEvent.surfaceTextureAvailable(surface);

    mWidth = width;
    mHeight = height;
}
项目：Idea-ijkplayer    文件：TextureRenderView.java    
public InternalSurfaceHolder(@NonNull TextureRenderView textureView,@NonNull ISurfaceTextureHost surfaceTextureHost) {
    mTextureView = textureView;
    mSurfaceTexture = surfaceTexture;
    mSurfaceTextureHost = surfaceTextureHost;
}
项目：airgram    文件：OutputSurface.java    
@Override
public void onFrameAvailable(SurfaceTexture st) {
    synchronized (mFrameSyncObject) {
        if (mFrameAvailable) {
            throw new RuntimeException("mFrameAvailable already set,frame Could be dropped");
        }
        mFrameAvailable = true;
        mFrameSyncObject.notifyAll();
    }
}
项目：live_master    文件：TextureMediaPlayer.java    
@Override
public void setSurfaceTexture(SurfaceTexture surfaceTexture) {
    if (mSurfaceTexture == surfaceTexture)
        return;

    releaseSurfaceTexture();
    mSurfaceTexture = surfaceTexture;
    if (surfaceTexture == null) {
        super.setSurface(null);
    } else {
        super.setSurface(new Surface(surfaceTexture));
    }
}
项目：PlusGram    文件：OutputSurface.java    
private void setup() {
    mTextureRender = new TextureRenderer(rotateRender);
    mTextureRender.surfaceCreated();
    mSurfaceTexture = new SurfaceTexture(mTextureRender.getTextureId());
    mSurfaceTexture.setonFrameAvailableListener(this);
    mSurface = new Surface(mSurfaceTexture);
}
项目：CameraKitView    文件：Camera2.java    
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture texture) {
    if (mTextureView != null) {
        mTextureView.setSurfaceTextureListener(null);
    }
    return true;
}

关于TextRenderer.MeasureText和Graphics.MeasureString大小不匹配的问题我们已经讲解完毕，感谢您的阅读，如果还想了解更多关于android camera的SurfaceTexture - SurfaceTexture作为preview流的消费者,代码位置在哪里.、android – getmeasuredheight()和getmeasuredwidth()在View.measure()之后返回0)、Android 画图：.measureText() 与 .getTextBounds()、android.graphics.SurfaceTexture的实例源码等相关内容，可以在本站寻找。

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