Android中吐司当前电池电量

/**

 * 

 * @author chrp

 *

 *土司当当电池电量

 */

public class MainActivity extends Activity {



	class BtteryReceiver extends BroadcastReceiver {



		@Override

		public void onReceive(Context context, Intent intent) {

			// TODO Auto-generated method stub

			System.out.println("+++++++++++++++++++++++");

			// 判断它是否是为电量变化的Broadcast Action

			if (Intent.ACTION_BATTERY_CHANGED.equals(intent.getAction())) {

				// 获取当前电量

				int level = intent.getIntExtra("level", 0);

				// 电量的总刻度

				int scale = intent.getIntExtra("scale", 0);



				// 把它转换成百分比

				String content = ("电池电量为" + ((level * 100) / scale) + "%");



				int key = ((level * 100) / scale);

				switch (key) {

				case 100:

					Toast.makeText(context, "电池已经充满", Toast.LENGTH_LONG).show();

					break;

				case 50:

					Toast.makeText(context, "电池已经使用一半", Toast.LENGTH_LONG)

							.show();

					break;

				case 30:

					Toast.makeText(context, "电池已到30%了", Toast.LENGTH_LONG)

							.show();

					break;

				case 40:

					Toast.makeText(context, "电池已到31%了", Toast.LENGTH_LONG)

							.show();

					break;

				case 10:

					Toast.makeText(context, "电池不足10%", Toast.LENGTH_LONG)

							.show();

					break;

				case 9:

					Toast.makeText(context, "电池不足9%", Toast.LENGTH_LONG).show();

					break;

				case 5:

					Toast.makeText(context, "电池不足5%", Toast.LENGTH_LONG).show();

					break;



				}



			}

		}



	}