Creating Android Custom Component: Check Box
Suppose, you are developing a data driven application of something related settings or kind of stuff, and where you want to implement on-off or show-hide kind of functionality. To implement such kind of functionalities we use Check Box or On-Off button components as front end. Most of the programming languages provides us some built-in components […]
Android Using ImageButton
Most of the time in the application we want to say more about, what button will function on click. But its not possible to write entire statement/description as label of button. And there is option for it to set image/picture as Icon on the button. In the given below xml you can see, how we […]
Android Using Buttons and Ways to Handling Event
In android development life-cycle, Button view is most common view used on activity. This article shows you basic types of Button view and how we can implement event handlers in different ways. Lets create layout xml first with some Buttons. main.xml
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<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:orientation="vertical" > <Button android:id="@+id/btn1" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="BUTTON 1"/> <Button android:id="@+id/btn2" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="BUTTON 2"/> <Button android:id="@+id/btn3" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="BUTTON 3" android:onClick="onBtnClick" /> <ToggleButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="BUTTON 4 Toggle" android:onClick="onToggleClick" /> </LinearLayout> |
Implementing onClick handlers in various ways.
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public class MainActivity extends ActionBarActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Button 1 Button btn1 = (Button) findViewById(R.id.btn1); btn1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(getApplicationContext(), "Button 1 Clicked", Toast.LENGTH_LONG).show(); } }); // Button 2 Button btn2 = (Button) findViewById(R.id.btn2); btn2.setOnClickListener(btnClickListener); } // anonymous class call by button 2 as on click listener private OnClickListener btnClickListener = new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(getApplicationContext(), "Button 2 Clicked", Toast.LENGTH_LONG).show(); } }; // Button 3 public void onBtnClick(View view){ Toast.makeText(getApplicationContext(), "Button 3 Clicked", Toast.LENGTH_LONG).show(); } // Button 4 Toggle public void onToggleClick(View view){ ToggleButton btn4 = (ToggleButton) view; Toast.makeText(getApplicationContext(), "Toggle Button 4 mode is " + btn4.isChecked(), Toast.LENGTH_LONG).show(); } } |
Handling Event Way 1 Notice the […]