Android 以编程方式设置视图宽度

Set View Width Programmatically

提问by Jason Crosby

I am trying to set the width and height of a view in code to show an ad for a free app I am working on. All of the UI is done in XML with the exception of this ad. Here is the code that displays the ad. It is in onCreate.

我正在尝试在代码中设置视图的宽度和高度，以显示我正在开发的免费应用程序的广告。除此广告外，所有 UI 均以 XML 格式完成。这是显示广告的代码。它在onCreate.

AdView adView = new AdView(this,"ad_url","my_ad_key",true,true);
LinearLayout layout = (LinearLayout) findViewById(R.id.testing);
adView.setAdListener(this);
layout.addView(adView);

This results in the ad being displayed like this. As you can see the width doesn't quite fill the whole page.

这会导致广告像这样显示。如您所见，宽度并没有完全填满整个页面。

Now when I change the code to this to attempt to set the size:

现在，当我将代码更改为此以尝试设置大小时：

AdView adView = new AdView(this,"ad_url","my_ad_key",true,true);
LinearLayout layout = (LinearLayout) findViewById(R.id.testing);
adView.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, 
                       LayoutParams.WRAP_CONTENT));
adView.setAdListener(this);
layout.addView(adView);

I get this:

我明白了：

I have tried all different combinations of FILL_PARENTand WRAP_CONTENTall with the same result. Is there something I am missing? Or another way I can have the ad fill the width of the device without filling the height? Any suggestions and help is greatly appreciated.

我已经尝试了所有不同的组合FILL_PARENT，并WRAP_CONTENT都具有相同的结果。有什么我想念的吗？或者我可以让广告填充设备的宽度而不填充高度的另一种方法？非常感谢任何建议和帮助。

EDITwhen I try to put it in XML I get an exception:

编辑当我尝试将其放入 XML 时，出现异常：

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:id="@+id/main_layout">

<fragment
    android:name="com.jasoncrosby.app.tipcalculatorfree.MainButtonFragment"
android:id="@+id/button_frag"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"/>
<com.adsdk.sdk.banner.AdView
    android:id="@+id/banner"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>

</LinearLayout>

> 09-09 22:39:43.448: E/AndroidRuntime(586): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.jasoncrosby.app.tipcalculatorfree/com.jasoncrosby.app.tipcalculatorfree.MainActivity}: android.view.InflateException: Binary XML file line #14: Error inflating class com.adsdk.sdk.banner.AdView
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1748)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1764)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.app.ActivityThread.access00(ActivityThread.java:122)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1002)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.os.Handler.dispatchMessage(Handler.java:99)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.os.Looper.loop(Looper.java:132)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.app.ActivityThread.main(ActivityThread.java:4025)
09-09 22:39:43.448: E/AndroidRuntime(586):  at java.lang.reflect.Method.invokeNative(Native Method)
09-09 22:39:43.448: E/AndroidRuntime(586):  at java.lang.reflect.Method.invoke(Method.java:491)
09-09 22:39:43.448: E/AndroidRuntime(586):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
09-09 22:39:43.448: E/AndroidRuntime(586):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
09-09 22:39:43.448: E/AndroidRuntime(586):  at dalvik.system.NativeStart.main(Native Method)
09-09 22:39:43.448: E/AndroidRuntime(586): Caused by: android.view.InflateException: Binary XML file line #14: Error inflating class com.adsdk.sdk.banner.AdView
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.view.LayoutInflater.createView(LayoutInflater.java:579)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:671)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:724)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.view.LayoutInflater.inflate(LayoutInflater.java:391)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.view.LayoutInflater.inflate(LayoutInflater.java:347)
09-09 22:39:43.448: E/AndroidRuntime(586):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:223)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.app.Activity.setContentView(Activity.java:1780)
09-09 22:39:43.448: E/AndroidRuntime(586):  at com.jasoncrosby.app.tipcalculatorfree.MainActivity.onCreate(MainActivity.java:95)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1712)
09-09 22:39:43.448: E/AndroidRuntime(586):  ... 11 more
09-09 22:39:43.448: E/AndroidRuntime(586): Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet]
09-09 22:39:43.448: E/AndroidRuntime(586):  at java.lang.ClassMembers.getConstructorOrMethod(ClassMembers.java:235)
09-09 22:39:43.448: E/AndroidRuntime(586):  at java.lang.Class.getConstructor(Class.java:459)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.view.LayoutInflater.createView(LayoutInflater.java:551)
09-09 22:39:43.448: E/AndroidRuntime(586):  ... 21 more

采纳答案by Mobiledata

This code let you fill the banner to the maximum width and keep the ratio. This will only work in portrait. You must recreate the ad when you rotate the device. In landscape you should just leave the ad as is because it will be quite big an blurred.

此代码可让您将横幅填充到最大宽度并保持比例。这仅适用于纵向。旋转设备时必须重新制作广告。在横向中，您应该保持广告原样，因为它会变得非常模糊。

Display display = getWindowManager().getDefaultDisplay();
int width = display.getWidth();
double ratio = ((float) (width))/300.0;
int height = (int)(ratio*50);

AdView adView = new AdView(this,"ad_url","my_ad_key",true,true);
LinearLayout layout = (LinearLayout) findViewById(R.id.testing);
mAdView.setLayoutParams(new FrameLayout.LayoutParams(LayoutParams.FILL_PARENT,height));
adView.setAdListener(this);
layout.addView(adView);

回答by Serhii Nadolynskyi

You can use something like code below, if you need to affect only specific value, and not touch others:

如果您只需要影响特定值而不影响其他值，则可以使用类似下面的代码：

view.getLayoutParams().width = newWidth;

回答by Ujjwal

in code add below line:

在代码中添加以下行：

spin27.setLayoutParams(new LinearLayout.LayoutParams(200, 120));

回答by Hardik Patel

yourView.setLayoutParams(new LinearLayout.LayoutParams(width, height));

回答by saurabh

hsThumbList.setLayoutParams(new LayoutParams(100, 400));

回答by zelva

check it in mdpi device.. If the ad displays correctly, the error should be in "px" to "dip" conversion..

在 mdpi 设备中检查它。如果广告显示正确，错误应该是“px”到“dip”的转换。

回答by LuxuryMode

The first parameter to LayoutParams is the width and the second is the height. So if you want the width to be FILL_PARENT, but the width to be, say, 20px, then use something new LayoutParams(FILL_PARENT, 20). Of course you should never use actual pixels in your code; you'll need to conver that to density-independent pixels, but you get the idea. Also, you need to make sure your parent LinearLayout has the right width and height that you're looking for. Seems to be you want the LinearLayout to fill the parent width-wise and then have the adview fill that linearlayout witdh-wise as well, so you probably need to specify android:layout_width:"fill_parent" and android:layout_height:"wrap_content" in your linear layout's xml.

LayoutParams 的第一个参数是宽度，第二个参数是高度。因此，如果您希望宽度为 FILL_PARENT，但宽度为 20px，则使用新的 LayoutParams(FILL_PARENT, 20)。当然，您永远不应该在代码中使用实际像素；您需要将其转换为与密度无关的像素，但您明白了。此外，您需要确保您的父 LinearLayout 具有您正在寻找的正确宽度和高度。似乎您希望 LinearLayout 以宽度方式填充父级，然后让 adview 也以宽度方式填充该线性布局，因此您可能需要在中指定 android:layout_width:"fill_parent" 和 android:layout_height:"wrap_content"您的线性布局的 xml。