无法在onCreate中设置LayoutParams

这是一个小原型，但它重复了真实程序的错误。无法在onCreate中设置LayoutParams

文件TestLPActivity：

package cz.gangnus.testlp; 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.ViewGroup.LayoutParams; 
import android.widget.LinearLayout; 

public class TestLPActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     LinearLayout allForm = (LinearLayout) findViewById(R.id.AllChannelsListForm); 
     int formWidth=1080; 
     int formHeight=540; 
     allForm.setLayoutParams(new LayoutParams(formWidth,formHeight)); 
    } 
}

的main.xml：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/AllChannelsListForm" 
    android:layout_width="1080dp" 
    android:layout_height="wrap_content" 
    android:background="@drawable/channels_list_bg" 
    android:gravity="top|left" 
    android:orientation="vertical" > 
</LinearLayout>

缺省清单：

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="cz.gangnus.testlp" 
android:versionCode="1" 
android:versionName="1.0" > 
<uses-sdk android:minSdkVersion="10" /> 
<application 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" > 
    <activity 
     android:name=".TestLPActivity" 
     android:label="@string/app_name" > 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 
      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
</application> 
</manifest>

PNG文件具有1140的宽度和高度570

不设置LAYO utparams一切都OK。但随着IT应用与下面的堆栈整理后的onResume下降：

FrameLayout(ViewGroup).measureChildWithMargins(View, int, int, int, int) line: 3129 
FrameLayout.onMeasure(int, int) line: 250 
FrameLayout(View).measure(int, int) line: 8313 
LinearLayout.measureVertical(int, int) line: 531  
LinearLayout.onMeasure(int, int) line: 309 
LinearLayout(View).measure(int, int) line: 8313 
PhoneWindow$DecorView(ViewGroup).measureChildWithMargins(View, int, int, int, int)  line: 3138 
PhoneWindow$DecorView(FrameLayout).onMeasure(int, int) line: 250  
PhoneWindow$DecorView(View).measure(int, int) line: 8313  
ViewRoot.performTraversals() line: 839 
ViewRoot.handleMessage(Message) line: 1859 
ViewRoot(Handler).dispatchMessage(Message) line: 99 
Looper.loop() line: 130 
ActivityThread.main(String[]) line: 3683  
Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method] 
Method.invoke(Object, Object...) line: 507 
ZygoteInit$MethodAndArgsCaller.run() line: 839 
ZygoteInit.main(String[]) line: 597 
NativeStart.main(String[]) line: not available [native method]

移动帕拉姆设置的onResume不会改变任何东西的行为。

事先感谢您的帮助。

来源

2012-01-20 Gangnus

为什么你可以手动设置你的布局根的尺寸是多少？ – Rich

尝试这种方式

LayoutParams params = allForm.getLayoutParams(); 
params.width=1080; 
params.height=540; 
allForm.setLayoutParams(params);

来源

2012-01-20 12:27:26 Pratik

哦！真的，愚蠢的我！一些重要的东西没有在新的LayoutParams中设置！所以，我必须改变旧的。 – Gangnus

无法在onCreate中设置LayoutParams

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