慕課網--toggleButton

ToggleButton(開關按鈕)是Android系統中比較簡單的一個組件，是一個具有選中和未選擇狀態雙狀態的按鈕，並且需要爲不同的狀態設置不同的顯示文本。

package com.example.test_toggle_button;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.ToggleButton;

public class MainActivity extends Activity implements OnCheckedChangeListener{
	private ToggleButton tb;
	private ImageView img;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		tb = (ToggleButton) findViewById(R.id.toggleButton1);
		img = (ImageView) findViewById(R.id.imageView1);
		
		tb.setOnCheckedChangeListener(this);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}
	
	@Override
	public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
		img.setImageResource(isChecked ? R.drawable.on : R.drawable.off);
		
	}
	
}

<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"
>

    <ToggleButton
        android:id="@+id/toggleButton1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textOn="開"
        android:textOff="關"
        android:checked="false"
     />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/off" />

</LinearLayout>