我試圖找到一種方法來修改marginTop通過代碼一個EditText ......我讀到setLayoutParams但我得到ForceClose這個消息:如何用代碼修改marginTop?
08-05 14:53:59.715: ERROR/AndroidRuntime(913): java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams
08-05 14:53:59.715: ERROR/AndroidRuntime(913): at android.widget.RelativeLayout$DependencyGraph.findRoots(RelativeLayout.java:1291)
08-05 14:53:59.715: ERROR/AndroidRuntime(913): at android.widget.RelativeLayout$DependencyGraph.getSortedViews(RelativeLayout.java:1238)
08-05 14:53:59.715: ERROR/AndroidRuntime(913): at android.widget.RelativeLayout.sortChildren(RelativeLayout.java:279)
08-05 14:53:59.715: ERROR/AndroidRuntime(913): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:299)
08-05 14:53:59.715: ERROR/AndroidRuntime(913): at android.view.View.measure(View.java:7964)
誰能解釋我應該怎麼辦?
giveuser = (EditText) findViewById(R.id.txt_username);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(5,5,5,5);
giveuser.setLayoutParams(lp);
和XML:
<EditText android:id="@+id/txt_username"
android:layout_height="wrap_content" android:layout_width="350px"
android:layout_centerHorizontal="true" android:layout_below="@+id/loginsubtitle"
android:layout_marginTop="180dip" android:singleLine="true"
android:hint="Identifiant" />
你有一個轉換異常,你可能使用了與錯誤轉換的findById。你能發佈你的代碼嗎? –