public class MyActivity extends Activity {
     protected void onCreate(Bundle icicle) {
         super.onCreate(icicle);

         setContentView(R.layout.content_layout_id);

         final Button button = (Button) findViewById(R.id.button_id);
         button.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
                 // Perform action on click
             }
         });
     }
 }

<EditText
    android:id="@+id/search"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:hint="@string/search_hint"
    android:inputType="text"
    android:imeOptions="actionSend" />

 <EditText
    android:id="@+id/postal_address"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:hint="@string/postal_address_hint"
    android:inputType="textPostalAddress|
                       textCapWords|
                       textNoSuggestions" />

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <CheckBox android:id="@+id/checkbox_meat"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/meat"
        android:onClick="onCheckboxClicked"/>
    <CheckBox android:id="@+id/checkbox_cheese"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/cheese"
        android:onClick="onCheckboxClicked"/>
</LinearLayout>

public void onCheckboxClicked(View view) {
    // Is the view now checked?
    boolean checked = ((CheckBox) view).isChecked();
    
    // Check which checkbox was clicked
    switch(view.getId()) {
        case R.id.checkbox_meat:
            if (checked)
                // Put some meat on the sandwich
            else
                // Remove the meat
            break;
        case R.id.checkbox_cheese:
            if (checked)
                // Cheese me
            else
                // I‘m lactose intolerant
            break;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <RadioButton android:id="@+id/radio_pirates"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/pirates"
        android:onClick="onRadioButtonClicked"/>
    <RadioButton android:id="@+id/radio_ninjas"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/ninjas"
        android:onClick="onRadioButtonClicked"/>
</RadioGroup>

public void onRadioButtonClicked(View view) {
    // Is the button now checked?
    boolean checked = ((RadioButton) view).isChecked();
    
    // Check which radio button was clicked
    switch(view.getId()) {
        case R.id.radio_pirates:
            if (checked)
                // Pirates are the best
            break;
        case R.id.radio_ninjas:
            if (checked)
                // Ninjas rule
            break;
    }
}

<ToggleButton  
    android:id = "@+id/togglebutton" 
    android:layout_width = "wrap_content" 
    android:layout_height = "wrap_content" 
    android:textOn = "Vibrate在“ 
    机器人：textOff = “振动关闭” 
    机器人：的onClick = “onToggleClicked” />

public void onToggleClicked(View view) {
    // Is the toggle on?
    boolean on = ((ToggleButton) view).isChecked();
    
    if (on) {
        // Enable vibrate
    } else {
        // Disable vibrate
    }
}

<Spinner
         android:id="@+id/mySpinner"
         android:layout_width="wrap_content"
	 android:entries="@array/planets_arrays"
         android:prompt="@string/planets_prompt"
         android:layout_height="wrap_content" />

<?xml version="1.0" encoding="utf-8"?>
<resources>
	<string-array name="planets_array">
		<item>Mercury</item>
		<item>Venus</item>
		<item>Earth</item>
		<item>Mars</item>
	</string-array>
</resources>

public void setSpinnerToValue(Spinner spinner, String value) {
	int index = 0;
	SpinnerAdapter adapter = spinner.getAdapter();
	for (int i = 0; i < adapter.getCount(); i++) {
		if (adapter.getItem(i).equals(value)) {
			index = i;
			break; // terminate loop
		}
	}
	spinner.setSelection(index);
}

Spinner spinner = (Spinner) findViewById(R.id.spinner);
// Create an ArrayAdapter using the string array and a default spinner layout
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
        R.array.planets_array, android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
spinner.setAdapter(adapter);

<NumberPicker 
        android:id="@+id/np_total"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"  
/>

public class DemoPickerActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_demo_picker);
        NumberPicker numberPicker = 
            (NumberPicker) findViewById(R.id.np_total);
        numberPicker.setMinValue(0); 
        numberPicker.setMaxValue(100);    
        numberPicker.setWrapSelectorWheel(true);
    }
}

// within onCreate
numberPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
    @Override
    public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
        Log.d("DEBUG", "Selected number in picker is " + newVal);
    }
});