[英]Set programmatically margin in android?
我有吼叫xml
。 在這個xml
我需要以MarginTop "@+id/imgFooter" programatically
將MarginTop "@+id/imgFooter" programatically
為"@+id/imgCenter"
。但我不能。 我的XML
:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/rLayout"
android:background="@drawable/backrepeat">
<ImageView
android:id="@+id/imgHeader"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="One"
android:layout_alignParentTop="true"
android:adjustViewBounds="true"
android:layout_centerHorizontal="true"
android:src="@drawable/header" />
<ImageView
android:id="@+id/imgCenter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/imgHeader"
android:layout_above="@+id/imgFooter"
android:contentDescription="Two"
android:src="@drawable/center" />
<ImageView
android:id="@+id/imgFooter"
android:contentDescription="Three"
android:layout_alignParentBottom="true"
android:adjustViewBounds="true"
android:layout_centerHorizontal="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/footer" />
</RelativeLayout>
我的MainActivity.class
:
public class StartPage extends Activity{
ImageView imgHeader;
ImageView imgFooter;
DisplayMetrics metrics;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.start_page);
imgHeader = (ImageView) findViewById(R.id.imgHeader);
metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int width = metrics.widthPixels;
int height = metrics.heightPixels;
int MPTopBottomHeader = (98 * width) / 1080;
int MPLeftRightHeader = (110 * height) / 1920;
RelativeLayout.LayoutParams lpimgHeader = new RelativeLayout.LayoutParams(imgHeader.getLayoutParams());
lpimgHeader.setMargins(MPLeftRightHeader, MPTopBottomHeader, MPLeftRightHeader, MPTopBottomHeader);
imgHeader.setLayoutParams(lpimgHeader);
imgFooter = (ImageView) findViewById(R.id.imgFooter);
int MPTopBottomFooter = (185 * width) / 1080;
int MPLeftRightFooter = (260 * height) / 1920;
===== HERE ======>RelativeLayout.LayoutParams lpimgFooter = new RelativeLayout.LayoutParams(imgFooter.getLayoutParams());
lpimgFooter.setMargins(MPLeftRightFooter, MPTopBottomFooter, MPLeftRightFooter, MPTopBottomFooter);
imgFooter.setLayoutParams(lpimgFooter);
}
}
嗯好吧 您應該使用MarginLayoutParams
並設置bottomMargin
。
/*RelativeLayout.LayoutParams lpimgFooter = new RelativeLayout.LayoutParams(imgFooter.getLayoutParams());
lpimgFooter.setMargins(MPLeftRightFooter, MPTopBottomFooter, MPLeftRightFooter, MPTopBottomFooter);
imgFooter.setLayoutParams(lpimgFooter);*/ (Comment this code)
MarginLayoutParams lpimgFooter = (MarginLayoutParams) imgFooter.getLayoutParams();
lpimgFooter.bottomMargin = MPTopBottomFooter;
lpimgFooter.leftMargin = MPLeftRightFooter;
lpimgFooter.rightMargin = MPLeftRightFooter;
imgFooter.setLayoutParams(lpimgFooter);
用這個:
lpimgFooter.addRule(RelativeLayout.BELOW, R.id.imgCenter);
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