[英]how to change the x of view in relativelayout Programmatically in android
我在relativeleayout中有一個視圖,我想將視圖的位置更改為relativeleayout的中間:我該怎么辦?
xml:
<RelativeLayout
android:id="@+id/partieoption"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:weightSum="6"
android:orientation="horizontal" >
<ImageView
android:id="@+id/photo2"
android:src="@drawable/loglog"
android:layout_width="50dp"
android:layout_height="50dp"
/>
</RelativeLayout>
和
RelativeLayout partieoption = (RelativeLayout) findViewById(R.id.partieoption);
ImageView x = (ImageView) findViewById(R.id.photo2);
您需要使用CENTER_IN_PARENT 規則為ImageView
創建RelativeLayout.LayoutParams ,然后通過setLayoutParams(ViewGroup.LayoutParams params)
。
這是一個例子:
ImageView imageView = (ImageView)findViewById(R.id.iv_image);
RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams)imageView.getLayoutParams();
layoutParams.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE);
imageView.setLayoutParams(layoutParams);
<ImageView
android:id="@+id/photo2"
android:src="@drawable/loglog"
android:layout_width="50dp"
android:layout_height="50dp"
android:gravity="center"
android:layout_gravity="center"
/>
要移動視圖,請添加以下代碼
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
RelativeLayout partieoption = (RelativeLayout) findViewById(R.id.partieoption);
ImageView iv = (ImageView) findViewById(R.id.photo2);
ObjectAnimator transAnimation= ObjectAnimator.ofFloat(iv, x, iv.getX(), width/2);
transAnimation.setDuration(3000);
transAnimation.start();
使用xml中的gravity屬性,如下所示:
android:layout_gravity="center"
在你的情況下,我想會是這樣的:
<RelativeLayout
android:id="@+id/partieoption"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:weightSum="6"
android:orientation="horizontal" >
<ImageView
android:id="@+id/photo2"
android:src="@drawable/loglog"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_gravity="center"
/>
</RelativeLayout>
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