Camera 2 Preview已拉伸

Question

我目前正在制作一个使用Camera2应用程序接口的安卓应用程序。我正面临着AutoFitTextureView的问题，图像显示为拉伸。我的AutoFitTextureView代码如下所示

public class AutoFitTextureView extends TextureView {
private int mRatioWidth = 0;
private int mRatioHeight = 0;
private boolean mWithMargin = false;
public AutoFitTextureView(Context context) {
    this(context, null);
}
public AutoFitTextureView(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
}
public AutoFitTextureView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}

public void setAspectRatio(int width, int height) {
    if (width < 0 || height < 0) {
        throw new IllegalArgumentException("Size cannot be negative.");
    }
    mRatioWidth = width;
    mRatioHeight = height;
    requestLayout();
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    int width = MeasureSpec.getSize(widthMeasureSpec);
    int height = MeasureSpec.getSize(heightMeasureSpec);
    if (0 == mRatioWidth || 0 == mRatioHeight) {
        setMeasuredDimension(width, height);
    } else {
        if (width < height * mRatioWidth / mRatioHeight) {
            setMeasuredDimension(width, width * mRatioHeight / mRatioWidth);
        } else {
            setMeasuredDimension(height * mRatioWidth / mRatioHeight, height);
        }
    }
}

XML代码-

拉伸图像：

​

​

我使用的XML代码如下预览图所示：

 <com.qopius.AutoFitTextureViewNew
        android:id="@+id/texture"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
         />

Answer 1

试试这段代码

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    int width = MeasureSpec.getSize(widthMeasureSpec);
    int height = MeasureSpec.getSize(heightMeasureSpec);
    if (0 == mRatioWidth || 0 == mRatioHeight) {
        setMeasuredDimension(width, height);
    } else {
            if (width < height * mRatioWidth / mRatioHeight) {
            if (width > height * mRatioWidth / mRatioHeight) {
                setMeasuredDimension(width, width * mRatioHeight / mRatioWidth);
            } else {
                setMeasuredDimension(height * mRatioWidth / mRatioHeight, height);
}
}

Answer 2

试试这个

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    int width = MeasureSpec.getSize(widthMeasureSpec);
    int height = MeasureSpec.getSize(heightMeasureSpec);
    if (0 == mRatioWidth || 0 == mRatioHeight) {
        setMeasuredDimension(width, height);
    } else {
        if (width > height * mRatioWidth / mRatioHeight) {
            setMeasuredDimension(width, width * mRatioHeight / mRatioWidth);
        } else {
            setMeasuredDimension(height * mRatioWidth / mRatioHeight, height);
        }
    }
}

Answer 3

您需要将AutoFitTextureView放在允许其调整大小的父视图/容器中。如果父视图不允许这样做，那么无论你在它的onMeasure中做什么，它都会调整纹理视图的大小。

例如，Camera2Basic示例将AutoFitTextureView放在RelativeLayout中：

https://github.com/googlesamples/android-Camera2Basic/blob/master/Application/src/main/res/layout/fragment_camera2_basic.xml