1.首先是创建一个广播接受者
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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键,程序到了后台 Toast.makeText(getApplicationContext(), "home", Toast.LENGTH_LONG).show(); }else if(TextUtils.equals(reason, SYSTEM_HOME_KEY_LONG)){ //表示长按home键,显示最近使用的程序列表 } } } }; |
2.注册监听
可以在Activity里注册，也可以在Service,Application里面
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//注册广播 registerReceiver(mHomeKeyEventReceiver, new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)); |
完整的代码如下：
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import android.app.Application; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.text.TextUtils; import android.widget.Toast; public class MainApplication extends Application { /** * 监听是否点击了home键将客户端推到后台 */ 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键,程序到了后台 Toast.makeText(getApplicationContext(), "home", Toast.LENGTH_LONG).show(); }else if(TextUtils.equals(reason, SYSTEM_HOME_KEY_LONG)){ //表示长按home键,显示最近使用的程序列表 } } } }; @Override public void onCreate() { super.onCreate(); //注册广播 registerReceiver(mHomeKeyEventReceiver, new IntentFilter( Intent.ACTION_CLOSE_SYSTEM_DIALOGS)); } @Override public void onTerminate() { unregisterReceiver(mHomeKeyEventReceiver); super.onTerminate(); } } |
参考链接：监听android home键的实现方式