android - 以编程方式调整框架布局的大小

Question

我有类似的东西:

  <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/photo1"
            android:orientation="vertical" >
     <FrameLayout
                android:id="@+id/photo2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" >

    </FrameLayout>
    <Fragment>

</Fragment>
    </FrameLayout>

我想调整 photo2 FrameLayout 的大小。

public void setScreenSize() {
    Display display = getWindowManager().getDefaultDisplay();
    FrameLayout layout = (FrameLayout) findViewById(R.id.photo2);
    int screen_height = display.getHeight();
    screen_height = (int) (0.60*screen_height);
    LayoutParams parms = (LayoutParams) layout.getLayoutParams();
    parms.height = screen_height;
    }

不幸的是，这不起作用，我不知道为什么。

Answer 1

您是否将高度设置回布局？

public void setScreenSize() {
    Display display = getWindowManager().getDefaultDisplay();
    FrameLayout layout = (FrameLayout) findViewById(R.id.photo2);
    int screen_height = display.getHeight();
    screen_height = (int) (0.60*screen_height);
    LayoutParams parms = (LayoutParams) layout.getLayoutParams();
    parms.height = screen_height;
    // Set it back.
    layout.setLayoutParams(parms);
}