監聽android home鍵的實作方式

監聽android home鍵的實作方式 1.  通過廣播的方式監聽home鍵，這個比較好使    首先是建立一個廣播接受者

private BroadcastReceiver mHomeKeyEventReceiver = new BroadcastReceiver() {
		String SYSTEM_REASON = "reason";
		String SYSTEM_HOME_KEY = "homekey";
		String SYSTEM_HOME_KEY_LONG = "recentapps";
		 
		@Override
		public void onReceive(Context context, Intent intent) {
			String action = intent.getAction();
			if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
				String reason = intent.getStringExtra(SYSTEM_REASON);
				if (TextUtils.equals(reason, SYSTEM_HOME_KEY)) {
					 //表示按了home鍵,程式到了背景
					Toast.makeText(getApplicationContext(), "home", 1).show();
				}else if(TextUtils.equals(reason, SYSTEM_HOME_KEY_LONG)){
					//表示長按home鍵,顯示最近使用的程式清單
				}
			} 
		}
	};
           

注冊監聽

可以在Activity裡注冊，也可以在Service裡面

//注冊廣播
		registerReceiver(mHomeKeyEventReceiver, new IntentFilter(
				Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
           

完整的代碼如下：

package com.example.homedemo;

import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.text.TextUtils;
import android.view.Menu;
import android.widget.Toast;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		//注冊廣播
		registerReceiver(mHomeKeyEventReceiver, new IntentFilter(
				Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
	}

	 
	/**
	 * 監聽是否點選了home鍵将用戶端推到背景
	 */
	private BroadcastReceiver mHomeKeyEventReceiver = new BroadcastReceiver() {
		String SYSTEM_REASON = "reason";
		String SYSTEM_HOME_KEY = "homekey";
		String SYSTEM_HOME_KEY_LONG = "recentapps";
		 
		@Override
		public void onReceive(Context context, Intent intent) {
			String action = intent.getAction();
			if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
				String reason = intent.getStringExtra(SYSTEM_REASON);
				if (TextUtils.equals(reason, SYSTEM_HOME_KEY)) {
					 //表示按了home鍵,程式到了背景
					Toast.makeText(getApplicationContext(), "home", 1).show();
				}else if(TextUtils.equals(reason, SYSTEM_HOME_KEY_LONG)){
					//表示長按home鍵,顯示最近使用的程式清單
				}
			} 
		}
	};
}