以编程方式设置视图宽度

Question

我正在尝试在代码中设置视图的宽度和高度，以显示我正在处理的免费应用的广告。除了此广告之外，所有UI都以XML格式完成。以下是显示广告的代码。它位于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);

这会导致广告显示如下。正如您所看到的，宽度并不能完全覆盖整个页面。

现在当我将代码更改为此时尝试设置大小：

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);

我明白了：

我尝试了FILL_PARENT和WRAP_CONTENT的所有不同组合，但结果相同。有什么我想念的吗？或者另一种方法，我可以让广告填充设备的宽度而不填充高度？非常感谢任何建议和帮助。

编辑当我尝试将其放入XML时，我得到一个例外：

<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.access$1500(ActivityThread.java:122)
09-09 22:39:43.448: E/AndroidRuntime(586):  at android.app.ActivityThread$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

Answer 1

您可以使用下面的代码，如果您只需要影响特定值，而不是触及他人：

view.getLayoutParams().width = newWidth;

Answer 2

此代码可让您将横幅填充到最大宽度并保持比率。 这只适用于肖像。您必须在旋转设备时重新创建广告。 在风景中你应该保留广告，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);

Answer 3

在代码中添加以下行：

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

Answer 4

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  <div class="ui top attached steps" [class.one]="steps.length == 1" [class.two]="steps.length == 2" [class.three]="steps.length == 3" [class.four]="steps.length == 4" [class.five]="steps.length == 5">
    <div  class="step" *ngFor="let item of steps">
      <i class="industry icon"></i>
      <div class="content">
        <div class="title">test title</div>
        <div class="description">test content</div>
      </div>
    </div>
  </div>
  <div class="ui segment" *ngFor="let item of steps">
    <!--

    @========================================
        HERE IS A Quotation

        I need to inject only one step component content that match the condition Stepper.activeStep == step.sid

Note : Please I do not want to use ng-template in app.component.html :)

     @========================================
    -->

  </div>
</div>

Answer 5

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，你不应该在你的代码中使用实际的像素;你需要将它转换为与密度无关的像素，但你明白了。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。似乎是你希望LinearLayout在宽度方面填充父级，然后让adview填充那个linearlayout，所以你可能需要指定android：layout_width：“fill_parent”和android：layout_height：“wrap_content”in你的线性布局的xml。

Answer 6

在mdpi设备中检查..如果广告正确显示，则错误应该是“px”到“dip”转换..

Answer 7

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