关于SurfaceView横竖屏切换显示问题

我们一般都会用SurfaceView做预览和播放，话不多说，直接上代码清单文件中设置好代码中实现onConfigurationChanged()方法

android:configChanges="orientation|screenSize

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {

//竖屏显示

        LayoutParams lp = mSurface.getLayoutParams();
        lp.width = lp.MATCH_PARENT;
        lp.height = 680;
        mSurface.setLayoutParams(lp);


    } else if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {

//横屏显示
        LayoutParams lp = mSurface.getLayoutParams();
        lp.width = lp.MATCH_PARENT;
        lp.height =lp.MATCH_PARENT;
        mSurface.setLayoutParams(lp);

    }

通过判断横竖屏来设置surfaceView的宽高就可以了，有的需求是横竖屏切换后要保持一定的比例，请看下面

DisplayMetrics dm = new DisplayMetrics();
if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
    ((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(dm);

    int screenWidth = dm.widthPixels;

    int screenHeigh = dm.heightPixels;
    LayoutParams lp = mSurface.getLayoutParams();
    lp.width = screenWidth;
    lp.height = screenWidth * 9/16;

    mSurface.setLayoutParams(lp);

} else if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
    ((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(dm);

    int screenWidth = dm.widthPixels;

    int screenHeigh = dm.heightPixels;
    LayoutParams lp = mSurface.getLayoutParams();
    lp.width = screenHeigh*16/9;
    lp.height =screenHeigh;
    mSurface.setLayoutParams(lp);
}

获取手机系统的宽高，你想要什么比例就按比例计算就可以了。

关于SurfaceView横竖屏切换显示问题

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