Sunday, May 12, 2013

Show and hide ActionBar using Java code

With android:theme="@android:style/Theme.Holo" is using, Java code can detect if ActionBar is showing currently by calling ActionBar.isShowing() method, and show/hide it by calling ActionBar.show()/ActionBar.hide().

Show and hide ActionBar using Java code


package com.example.androidactionbar;

import android.os.Bundle;
import android.app.ActionBar;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button buttonToggleActionBar = (Button)findViewById(R.id.toggleactionbar);
buttonToggleActionBar.setOnClickListener(new OnClickListener(){

@Override
public void onClick(View arg0) {
ActionBar myActionBar = getActionBar();
boolean myActionBarisShowing = myActionBar.isShowing();
if(myActionBarisShowing){
myActionBar.hide();
Toast.makeText(getApplicationContext(),
"Hide ActionBar",
Toast.LENGTH_LONG).show();
}else{
myActionBar.show();
Toast.makeText(getApplicationContext(),
"Show ActionBar",
Toast.LENGTH_LONG).show();
}
}});
}

}


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context=".MainActivity" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<Button
android:id="@+id/toggleactionbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Toggle ActionBar" />

</LinearLayout>


AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidactionbar"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="17" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@android:style/Theme.Holo" >
<activity
android:name="com.example.androidactionbar.MainActivity"
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>


Related:
- Display and hide ActionBar in XML

Next:
- Save state of ActionBar visibility

No comments:

Post a Comment