191

是否可以在 Android 中设置视图的绝对位置?(我知道有一个AbsoluteLayout,但它已被弃用......)

例如,如果我有一个 240x320px 的屏幕,我如何添加一个 20x20px 的屏幕,ImageView使其中心位于 (100,100) 位置?

4

8 回答 8

282

您可以使用相对布局。假设您想要一个位于布局内 (50,60) 位置的 30x40 ImageView。在您的活动中的某个地方:

// Some existing RelativeLayout from your layout xml
RelativeLayout rl = (RelativeLayout) findViewById(R.id.my_relative_layout);

ImageView iv = new ImageView(this);

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(30, 40);
params.leftMargin = 50;
params.topMargin = 60;
rl.addView(iv, params);

更多示例:

分别在 (50,60) 和 (80,90) 放置两个 30x40 ImageView(一个黄色,一个红色):

RelativeLayout rl = (RelativeLayout) findViewById(R.id.my_relative_layout);
ImageView iv;
RelativeLayout.LayoutParams params;

iv = new ImageView(this);
iv.setBackgroundColor(Color.YELLOW);
params = new RelativeLayout.LayoutParams(30, 40);
params.leftMargin = 50;
params.topMargin = 60;
rl.addView(iv, params);

iv = new ImageView(this);
iv.setBackgroundColor(Color.RED);
params = new RelativeLayout.LayoutParams(30, 40);
params.leftMargin = 80;
params.topMargin = 90;
rl.addView(iv, params);

将一个 30x40 黄色 ImageView 放置在 (50,60) 和另一个 30x40 红色 ImageView <80,90>相对于黄色 ImageView:

RelativeLayout rl = (RelativeLayout) findViewById(R.id.my_relative_layout);
ImageView iv;
RelativeLayout.LayoutParams params;

int yellow_iv_id = 123; // Some arbitrary ID value.

iv = new ImageView(this);
iv.setId(yellow_iv_id);
iv.setBackgroundColor(Color.YELLOW);
params = new RelativeLayout.LayoutParams(30, 40);
params.leftMargin = 50;
params.topMargin = 60;
rl.addView(iv, params);

iv = new ImageView(this);
iv.setBackgroundColor(Color.RED);
params = new RelativeLayout.LayoutParams(30, 40);
params.leftMargin = 80;
params.topMargin = 90;

// This line defines how params.leftMargin and params.topMargin are interpreted.
// In this case, "<80,90>" means <80,90> to the right of the yellow ImageView.
params.addRule(RelativeLayout.RIGHT_OF, yellow_iv_id);

rl.addView(iv, params);
于 2010-07-20T22:58:11.787 回答
73

通常,您可以通过指定 leftMargin 和 topMargin 属性,使用 FrameLayout 作为容器将 View 添加到特定位置

以下示例将使用 FrameLayout 作为全屏容器将 20x20px ImageView 放置在位置 (100,200):

XML

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/root"
    android:background="#33AAFF"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
</FrameLayout>

活动/片段/自定义视图

//...
FrameLayout root = (FrameLayout)findViewById(R.id.root);
ImageView img = new ImageView(this);
img.setBackgroundColor(Color.RED);
//..load something inside the ImageView, we just set the background color

FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(20, 20);
params.leftMargin = 100;
params.topMargin  = 200;
root.addView(img, params);
//...

这可以解决问题,因为边距可以用作绝对 (X,Y) 坐标,而无需使用 RelativeLayout:

在此处输入图像描述

于 2015-01-07T17:15:14.637 回答
18

只是为了添加到上面 Andy Zhang 的答案,如果你愿意,你可以给 rl.addView 提供参数,然后再对其进行更改,所以:

params = new RelativeLayout.LayoutParams(30, 40);
params.leftMargin = 50;
params.topMargin = 60;
rl.addView(iv, params);

同样可以写成:

params = new RelativeLayout.LayoutParams(30, 40);
rl.addView(iv, params);
params.leftMargin = 50;
params.topMargin = 60;

所以如果你保留了params变量,你可以在添加到rl之后随时改变iv的布局。

于 2012-01-19T03:02:15.943 回答
5

一种更简洁和动态的方式,无需在代码中硬编码任何像素值。

我想在单击按钮的正下方放置一个对话框(我会即时充气)。

并以这种方式解决了它:

    // get the yoffset of the position where your View has to be placed 
    final int yoffset = < calculate the position of the view >

    // position using top margin
    if(myView.getLayoutParams() instanceof MarginLayoutParams) {
        ((MarginLayoutParams) myView.getLayoutParams()).topMargin = yOffset;
    }

但是,您必须确保 的父布局myViewRelativeLayout.

更完整的代码:

    // identify the button
    final Button clickedButton = <... code to find the button here ...>

    // inflate the dialog - the following style preserves xml layout params
    final View floatingDialog = 
        this.getLayoutInflater().inflate(R.layout.floating_dialog,
            this.floatingDialogContainer, false);

    this.floatingDialogContainer.addView(floatingDialog);

    // get the buttons position
    final int[] buttonPos = new int[2];
    clickedButton.getLocationOnScreen(buttonPos);        
    final int yOffset =  buttonPos[1] + clickedButton.getHeight();

    // position using top margin
    if(floatingDialog.getLayoutParams() instanceof MarginLayoutParams) {
        ((MarginLayoutParams) floatingDialog.getLayoutParams()).topMargin = yOffset;
    }

这样,您仍然可以期望目标视图调整到使用布局 XML 文件设置的任何布局参数,而不是在 Java 代码中硬编码这些像素/dps。

于 2012-07-31T14:08:33.517 回答
1

检查截图

将任何视图放在您想要的XY点上

布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.test.MainActivity" >

    <AbsoluteLayout
        android:id="@+id/absolute"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <RelativeLayout
            android:id="@+id/rlParent"
            android:layout_width="match_parent"
            android:layout_height="match_parent" >

            <ImageView
                android:id="@+id/img"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@drawable/btn_blue_matte" />
        </RelativeLayout>
    </AbsoluteLayout>

</RelativeLayout>

Java 类

public class MainActivity extends Activity {

    private RelativeLayout rlParent;
    private int width = 100, height = 150, x = 20, y= 50; 

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        AbsoluteLayout.LayoutParams param = new AbsoluteLayout.LayoutParams(width, height, x, y);
        rlParent = (RelativeLayout)findViewById(R.id.rlParent);
        rlParent.setLayoutParams(param);
    }
}

完毕

于 2015-06-02T04:25:54.613 回答
0

以防万一它可能对某人有所帮助,您也可以尝试这个动画器 ViewPropertyAnimator如下

myView.animate().x(50f).y(100f);

myView.animate().translateX(pixelInScreen) 

注意:此像素与视图无关。这个像素是屏幕中的像素位置。

归功于bpr10 答案

于 2017-07-26T10:25:05.193 回答
-1

尝试以下代码以设置特定位置的视图:-

            TextView textView = new TextView(getActivity());
            textView.setId(R.id.overflowCount);
            textView.setText(count + "");
            textView.setGravity(Gravity.CENTER);
            textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 12);
            textView.setTextColor(getActivity().getResources().getColor(R.color.white));
            textView.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    // to handle click 
                }
            });
            // set background 
            textView.setBackgroundResource(R.drawable.overflow_menu_badge_bg);

            // set apear

            textView.animate()
                    .scaleXBy(.15f)
                    .scaleYBy(.15f)
                    .setDuration(700)
                    .alpha(1)
                    .setInterpolator(new BounceInterpolator()).start();
            FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(
                    FrameLayout.LayoutParams.WRAP_CONTENT,
                    FrameLayout.LayoutParams.WRAP_CONTENT);
            layoutParams.topMargin = 100; // margin in pixels, not dps
            layoutParams.leftMargin = 100; // margin in pixels, not dps
            textView.setLayoutParams(layoutParams);

            // add into my parent view
            mainFrameLaout.addView(textView);
于 2015-09-17T09:16:35.353 回答
-2

我的Xamarin代码,我为此目的使用FrameLayout ,以下是我的代码:

               List<object> content = new List<object>();

        object aWebView = new {ContentType="web",Width="300", Height = "300",X="10",Y="30",ContentUrl="http://www.google.com" };
        content.Add(aWebView);
        object aWebView2 = new { ContentType = "image", Width = "300", Height = "300", X = "20", Y = "40", ContentUrl = "https://www.nasa.gov/sites/default/files/styles/image_card_4x3_ratio/public/thumbnails/image/leisa_christmas_false_color.png?itok=Jxf0IlS4" };
        content.Add(aWebView2);
        FrameLayout myLayout = (FrameLayout)FindViewById(Resource.Id.frameLayout1);
        foreach (object item in content)
        {

            string contentType = item.GetType().GetProperty("ContentType").GetValue(item, null).ToString();
            FrameLayout.LayoutParams param = new FrameLayout.LayoutParams(Convert.ToInt32(item.GetType().GetProperty("Width").GetValue(item, null).ToString()), Convert.ToInt32(item.GetType().GetProperty("Height").GetValue(item, null).ToString()));
            param.LeftMargin = Convert.ToInt32(item.GetType().GetProperty("X").GetValue(item, null).ToString());
            param.TopMargin = Convert.ToInt32(item.GetType().GetProperty("Y").GetValue(item, null).ToString());

            switch (contentType) {
                case "web":{
                        WebView webview = new WebView(this);

                        //webview.hei;
                        myLayout.AddView(webview, param);
                        webview.SetWebViewClient(new WebViewClient());
                        webview.LoadUrl(item.GetType().GetProperty("ContentUrl").GetValue(item, null).ToString());

                        break;
                    }
                case "image":
                    {
                        ImageView imageview = new ImageView(this);

                        //webview.hei;
                        myLayout.AddView(imageview, param);
                        var imageBitmap =  GetImageBitmapFromUrl("https://www.nasa.gov/sites/default/files/styles/image_card_4x3_ratio/public/thumbnails/image/leisa_christmas_false_color.png?itok=Jxf0IlS4");
                        imageview.SetImageBitmap(imageBitmap);


                        break;
                    }

            }

        }

这对我很有用,因为我需要 view 的属性根据它们的外观相互重叠,例如视图堆叠在一起

于 2016-11-06T07:59:00.623 回答