为什么不能弹出提醒信息

Question

public class MainActivity extends Activity { private IntentFilter intentFilter; private LocalReceiver localReceiver; private LocalBroadcastManager localBroadcastManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); localBroadcastManager = LocalBroadcastManager.getInstance(this);//获取实例 Button button = (Button) findViewById(R.id.button); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent("com.example.broadcasttest.LOCAL_BROADCAST"); localBroadcastManager.sendBroadcast(intent);//发送本地广播 } }); intentFilter = new IntentFilter(); intentFilter.addAction("com.example.broadcasttest.LOCAL-BROADCAST"); localReceiver = new LocalReceiver(); localBroadcastManager.registerReceiver(localReceiver, intentFilter); //注册本地广播器 } @Override protected void onDestroy() { super.onDestroy(); localBroadcastManager.unregisterReceiver(localReceiver); } class LocalReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Toast.makeText(context, "received local broadcast", Toast.LENGTH_SHORT).show(); } }}请问上面代码哪里有问题？为什么点击按钮之后没有弹出提示文本"received local broadcast"？

Answer 1

难道你没有发现Intent intent = new Intent("com.example.broadcasttest.LOCAL_BROADCAST")和intentFilter.addAction("com.example.broadcasttest.LOCAL-BROADCAST")这两句话中的字符串不一样么？我跑了你的代码，-和_的问题，一般而言，需要用一个字符串作为成员变量表示，就是防止写错