Hi all!
I am coding a custom view, extended from RelativeLayout, and I want to resize it programmatically, How can I do?
the custom view Class is something like:
public ActiveSlideView(Context context, AttributeSet attr){
super(context, attr);
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if(inflater != null){
inflater.inflate(R.layout.active_slide, this);
}
try a this one:
...
View view = inflater.inflate(R.layout.active_slide, this);
view.setMinimumWidth(200);
and the active_slide.xml is:
<?xml version="1.0" encoding="UTF-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/trislide_active_layout"
android:layout_width="fill_parent"
android:layout_height="120dip"
>
<Gallery android:id="@+id/ondemand_gallery"
android:layout_width="fill_parent"
android:layout_height="100dip"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:gravity="center_vertical"
android:spacing="10dp"
android:paddingTop="20dp"
android:focusable="false"
android:nextFocusLeft="@+id/ondemand_gallery"
android:nextFocusRight="@+id/ondemand_gallery"
/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:gravity= "center"
android:orientation="vertical"
>
<LinearLayout
android:layout_width = "fill_parent"
android:layout_height = "10dip"
/>
<ImageView android:id="@+id/ondemand_trislide_highlight_image"
android:layout_width="60dip"
android:layout_height="85dip"
android:background="@drawable/trislide_active_hl_back"
android:paddingTop="2dip"
android:paddingBottom="10dip"
android:layout_gravity="center"
/>
</LinearLayout>
<TextView android:id="@+id/ondemand_trislide_active_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="20dip"
android:textColor="#FFF"
android:textSize="15sp"
/>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:gravity= "center"
>
<TextView android:id="@+id/ondemand_trislide_active_text_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFF"
android:textSize="15sp"
android:layout_alignParentBottom="true"
/>
<TextView android:id="@+id/ondemand_trislide_active_text_actor"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFF"
android:textSize="7sp"
/>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:gravity= "right"
>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="right">
<TextView android:id="@+id/ondemand_trislide_active_count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="1dip"
android:paddingRight ="8dip"
android:textColor="#FFF"
android:textSize="14sp"
android:background="@drawable/trislide_active_item_count_back"
/>
<LinearLayout
android:layout_width="10dp"
android:layout_height="fill_parent"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="10dip"/>
</LinearLayout>
</merge>
So that the height of this view is 120dip as I set.
Now my mission is to hide some textView and change the Relative layout height to 100dip, I'm a little confused about "measure() and onMeasure()", "setLayoutParams()", "layout()", Can you give me a best practise?
When I use the following code:
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
params.height = 130;
this.setLayoutParams(params);
I got a Exception in Log:
06-03 14:28:10.544: ERROR/AndroidRuntime(929): Uncaught handler: thread main exiting due to uncaught exception
06-03 14:28:10.714: ERROR/AndroidRuntime(929): java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.widget.LinearLayout.measureVertical(LinearLayout.java:326)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.widget.LinearLayout.onMeasure(LinearLayout.java:278)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.view.View.measure(View.java:7964)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3023)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.view.View.measure(View.java:7964)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.widget.LinearLayout.measureVertical(LinearLayout.java:464)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.widget.LinearLayout.onMeasure(LinearLayout.java:278)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.view.View.measure(View.java:7964)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3023)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.view.View.measure(View.java:7964)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.view.ViewRoot.performTraversals(ViewRoot.java:763)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.view.ViewRoot.handleMessage(ViewRoot.java:1633)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.os.Handler.dispatchMessage(Handler.java:99)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.os.Looper.loop(Looper.java:123)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at android.app.ActivityThread.main(ActivityThread.java:4363)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at java.lang.reflect.Method.invokeNative(Native Method)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at java.lang.reflect.Method.invoke(Method.java:521)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
06-03 14:28:10.714: ERROR/AndroidRuntime(929): at dalvik.system.NativeStart.main(Native Method)
Why? Should I change the inner view's size also?
Thanks in advance!
this.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, theSizeIWant));
Problem solved!
NOTE: Be sure to use LinearLayout.LayoutParams!