屏幕旋转时 onSurfaceTextureSizeChanged 的​​ Android 错误值

Question

我正在尝试将视频流式传输到自定义 TextureView。视频以全屏模式显示。纵向模式和横向模式的布局相同:

<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"
    android:id="@+id/root_layout"
    tools:context=".SampleActivity">

    <com.my.package.MyCustomTextureView
        android:id="@+id/texture_custom"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:keepScreenOn="true" />

    ...
</RelativeLayout>

Manifest 中的 Activity 设置为自行处理方向更改:

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".SampleActivity"
        android:configChanges="orientation|keyboardHidden|screenSize"
        android:label="@string/app_name"
        android:theme="@style/FullscreenTheme" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

当方向改变时，Activity 似乎找到了正确的尺寸:

public class SampleActivity extends FragmentActivity {

    ....

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);

        RelativeLayout root = (RelativeLayout) findViewById(R.id.root_layout);
        MyCustomTextureView view = (MyCustomTextureView) findViewById(R.id.texture_custom);

        Log.d(TAG, "onConfigurationChanged newConfig: " + newConfig.screenWidthDp + "x" + newConfig.screenHeightDp + " root: "+root.getWidth() + "x" + root.getHeight() + " view: " + view.getWidth() + "x" + view.getHeight());

        ....

    }
}

Activity 日志输出，当我从纵向切换到横向时(注意:这是在布局更改之前):

09-29 15:30:28.975  22303-22303/com.my.package D/com.my.package.SampleActivity onConfigurationChanged newConfig: 598x335 root: 1080x1920 view: 1080x1920

...但是自定义纹理 View 收到了错误的值:

public class MyCustomTextureView extends TextureView implements TextureView.SurfaceTextureListener {

    ....

    @Override
    public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height) {

        Log.v(TAG, "onSurfaceTextureSizeChanged params: " + width + "x" + height + ", old values " + mMyWidth + "x" + mMyHeight + ", method values: " + getWidth() + "x" + getHeight());

    }

    ....
}

TextureView 日志输出，当我从纵向转换为横向时:

09-29 15:30:29.037  22303-22303/com.my.package V/com.my.package.MyCustomTextureView﹕ onSurfaceTextureSizeChanged params: 1080x1080, old values 1080x1920, method values: 1080x1080

如果我回到纵向模式，它似乎会再次检索到正确的尺寸:

Activity :

09-29 15:30:45.019  22303-22303/com.my.package D/com.my.package.SampleActivity onConfigurationChanged newConfig: 360x567 layout: 1920x1080 view: 1080x1080

纹理 View :

09-29 15:30:45.096  22303-22303/com.my.package V/com.my.package.MyCustomTextureView onSurfaceTextureSizeChanged params: 1080x1920, old values 1080x1920, method values: 1080x1920

我做错了什么？

Answer 1

...好吧，我自己通过反复试验找到了解决方案。主要是错误。

无论如何，我仍然不知道为什么会有这种行为。如果您有任何想法，请随时发表评论并启发我 :D(并帮助其他可能遇到类似问题的人)。

阅读后我想到了这个想法Mark G.的问题。我只是在 onConfigurationChanged 函数中添加了一行:

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

    RelativeLayout root = (RelativeLayout) findViewById(R.id.root_layout);
    MyCustomTextureView myView = (MyCustomTextureView) findViewById(R.id.texture_custom);

    Log.d(TAG, "onConfigurationChanged newConfig: " + newConfig.screenWidthDp + "x" + newConfig.screenHeightDp + " root: "+root.getWidth() + "x" + root.getHeight() + " view: " + myView.getWidth() + "x" + myView.getHeight());

    myView.setLayoutParams(new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT));

    ....

}

通过此更改，当我从 1080x1920 传递到 1920x1080 时，我在 onSurfaceTextureSizeChanged 函数中获得了正确的值，而不是 1080x1080。当我从 1920x1080 变为 1080x1920 时也是如此。

...不，不要问我为什么必须手动放置它。我不知道。

为了完全确定，我尝试将该行直接放在 onSurfaceTextureSizeChanged 函数中，而不是放在 onConfigurationChanged 中:

@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height) {

    Log.v(TAG, "onSurfaceTextureSizeChanged params: " + width + "x" + height + ", old values " + mMyWidth + "x" + mMyHeight + ", method values: " + getWidth() + "x" + getHeight());

    setLayoutParams(new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT));

}

...那没用。再一次，我不知道为什么。这可能是因为 1080x1080 不是 TextureView 的错误大小，而是根 RelativeLayout 本身的错误大小。