Question

如何通过代码而非xml为视频视图设置android:layout_alignParentBottom="true"？

Answer 1

我假设您要将VideoView添加到RelativeLayout？

RelativeLayout relativeLayout = findViewById(R.id.your_relative_layout);
mVideo = new VideoView(this); 
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); // or wrap_content
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
relativeLayout.addView(mVideo , layoutParams);

Answer 2

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
YourVideoView.setLayoutParams(params);

Answer 3

从您的视图中获取布局参数并添加规则

 RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams) view.getLayoutParams();
 lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);

Answer 4

有些参考文献是Here1和Here2

这就是你要做的事情：

创建RelativeLayout.LayoutParams对象。使用addRule（int）或addRule（int，int）来设置规则。第一种方法用于添加不需要值的规则。将参数设置为视图（在本例中为每个按钮）。

    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,   RelativeLayout.LayoutParams.WRAP_CONTENT);  
    params.addRule(RelativeLayout.ALIGN_PARENT_LEFT,RelativeLayout.TRUE);  
    yourView.setLayoutParams(params);

android：layout_alignParentBottom代码

4 个答案: