动态更改View Stub layout_height属性?

时间:2014-02-24 09:51:48

标签: android layout view viewstub

我在我的应用程序中使用查看存根。我正在将视图存根扩展到布局,它工作正常。现在,如果您看到 dummy_layout.xml ,我已经给出了 android:layout_height = 20dp 。我需要做的是在点击按钮时将视图存根高度从20 dp更改为Wrap_Content 。我怎样才能做到这一点?

我的最终目标是这样。我有一个按钮。当我第一次点击它时,我需要显示存根的完整布局。再次当我第二次点击它时,我需要设置存根的动画以向下滑动并仅显示其中的一部分。

dummy_layout.xml     

    <RelativeLayout
        android:id="@+id/topLayout"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

            <ImageView
                android:id="@+id/imageView1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentLeft="true"
                android:layout_alignParentRight="true"
                android:layout_alignParentTop="true"
                android:src="@drawable/ic_watch_pic" />

            <Button
                android:id="@+id/button1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentLeft="true"
                android:layout_alignParentTop="true"
                android:background="@color/dark_grey"
                android:text="Button" />

            <Button
                android:id="@+id/button2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                android:layout_alignParentTop="true"
                android:text="Button" />

    </RelativeLayout>

    <ViewStub
        android:id="@+id/viewStub1"
        android:layout="@layout/stub_layout"
        android:layout_width="wrap_content"
        **android:layout_height="20dp"**
        android:layout_alignParentBottom="true"/>


</RelativeLayout>

这是我的班级:

public class DummyFragment extends Fragment {

    private View mRootView;
    private Context mContext;
    private Button mButton;
    private boolean isVisible = true;
    private RelativeLayout mParentLayout;

    @Override
    public View onCreateView(final LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        mRootView = inflater.inflate(R.layout.dummy_layout,
                container, false);

        mContext = getActivity();

        mButton = (Button) mTopLayout.findViewById(R.id.button1);

        final ViewStub stub = (ViewStub) mRootView.findViewById(R.id.viewStub1);

            **final View inflated = stub.inflate();**

        inflated.setVisibility(View.VISIBLE);

        final View viewstublayout = mRootView.findViewById(R.id.viewStub1);

        mButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                if(isVisible)
                {
                    isVisible=false;    
                    inflated.setVisibility(View.VISIBLE);
                }
                else
                {
                    isVisible=true;                     
                    inflated.setVisibility(View.INVISIBLE);
                }
            }
        });

        return mRootView;
    }

}

3 个答案:

答案 0 :(得分:1)

您可以通过编辑视图LayoutParams来更改视图的宽度/高度。例如:

View stub = findViewById(R.id.viewStub1);
ViewGroup.LayoutParams lp = stub.getLayoutParams();
lp.height = ViewGroup.LayoutParams.WRAP_CONTENT;
stub.setLayoutParams(lp);

更好的问题是你为什么要这样做?也许有更好的方法来实现你的目标。

答案 1 :(得分:1)

试试这个

    final ViewStub stub = (ViewStub) mRootView.findViewById(R.id.viewStub1);
    View view = stub .inflate();

单击内部按钮

        LayoutParams params = (LayoutParams) view.getLayoutParams();
        params.width = LayoutParams.WRAP_CONTENT;
        view.setLayoutParams(params);

答案 2 :(得分:0)

试试这个并让我知道它是否运作良好。

LayoutParams lp = (LayoutParams) (YourView).getLayoutParams();

 lp.height = newheight;
 YourView.setLayoutParams(lp);